/* ════════════════════════════════════════════════════════════
   VORTEX · дизайн-система «Чернила и бумага»
   Piazzolla (заголовки) · Golos Text (интерфейс) · IBM Plex Mono (индексы)
   ════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Piazzolla:ital,opsz,wght@0,8..30,500;0,8..30,600;0,8..30,700;1,8..30,500;1,8..30,600&family=Golos+Text:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --paper: #F5F2EA;
  --paper-2: #EFEBE0;
  --card: #FCFAF4;
  --ink: #201D17;
  --text: #26221B;
  --text2: #716A5C;
  --label: #8F8779;
  --border: rgba(32,29,23,0.16);
  --hairline: rgba(32,29,23,0.11);
  --accent: #B4491F;          /* терракота */
  --accent-hover: #9C3C1A;
  --accent-light: rgba(180,73,31,0.07);
  --ok: #33604A;
  --ok-bg: #E6EEE0;
  --err: #A03A20;
  --err-bg: #F4E5DD;
  --chat-bg: #F1EDE3;
  --bubble-ai: #FCFAF4;
  --bubble-ai-border: rgba(32,29,23,0.12);
  --input-bg: #FCFAF4;
  --av-user-bg: #E3E7DA;
  --btn-ink: #201D17;
  --btn-ink-text: #F5F2EA;
  --font-display: 'Piazzolla', 'Times New Roman', Georgia, serif;
  --font-ui: 'Golos Text', -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --shadow-card: 0 1px 2px rgba(32,29,23,0.04);
  --shadow-pop: 0 18px 50px rgba(32,29,23,0.16), 0 4px 12px rgba(32,29,23,0.08);
}
body.dark {
  --paper: #171410;
  --paper-2: #1D1913;
  --card: #211D16;
  --ink: #EDE7D9;
  --text: #E9E3D4;
  --text2: #9C9384;
  --label: #7E766A;
  --border: rgba(237,231,217,0.18);
  --hairline: rgba(237,231,217,0.12);
  --accent: #D96B3B;
  --accent-hover: #E67A49;
  --accent-light: rgba(217,107,59,0.10);
  --ok: #8FBA9F;
  --ok-bg: #23302A;
  --err: #DE8A6A;
  --err-bg: #372218;
  --chat-bg: #1B1712;
  --bubble-ai: #241F18;
  --bubble-ai-border: rgba(237,231,217,0.13);
  --input-bg: #1D1913;
  --av-user-bg: #2A3226;
  --btn-ink: #EDE7D9;
  --btn-ink-text: #1B1712;
  --shadow-card: 0 1px 2px rgba(0,0,0,0.25);
  --shadow-pop: 0 18px 50px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.3);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  background: var(--paper);
  color: var(--text);
  min-height: 100vh;
  transition: background .25s, color .25s;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
/* лёгкое зерно бумаги */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 2000; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  opacity: .5;
}
body.dark::after { opacity: .3; }

::selection { background: rgba(180,73,31,0.18); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--label); }
::-webkit-scrollbar-track { background: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
button { font-family: var(--font-ui); }
input, textarea { font-family: var(--font-ui); }

.screen { display: none; width: 100%; min-height: 100vh; }
.screen.active { display: flex; }
.page { display: flex; width: 100%; min-height: 100vh; }

/* иконки */
.ic { width: 20px; height: 20px; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; display: inline-block; vertical-align: -4px; }

/* ── типографика ── */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--label);
}

/* ════════════════ ШАПКА САЙТА ════════════════ */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner { max-width: 1120px; margin: 0 auto; display: flex; align-items: center; gap: 20px; padding: 15px 28px; }
.nav-logo { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.nav-orb {
  width: 30px; height: 30px; display: grid; place-items: center;
  background: var(--btn-ink); color: var(--btn-ink-text);
  font-family: var(--font-display); font-style: italic; font-weight: 700; font-size: 17px;
  border-radius: 7px; text-decoration: none; line-height: 1;
}
.nav-name { font-family: var(--font-display); font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.nav-links { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav-link {
  padding: 8px 13px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em;
  color: var(--text2); text-decoration: none; text-transform: uppercase; border-radius: var(--r-sm);
  transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--ink); background: var(--paper-2); }
.nav-cta {
  margin-left: 10px; padding: 9px 20px; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text) !important;
  font-size: 13.5px; font-weight: 600; text-decoration: none;
  transition: opacity .15s;
}
.nav-cta:hover { opacity: .88; }
.nav-theme-btn {
  background: none; border: 1px solid var(--border); border-radius: var(--r-sm);
  width: 34px; height: 34px; cursor: pointer; color: var(--text2);
  display: flex; align-items: center; justify-content: center; transition: all .15s;
}
.nav-theme-btn:hover { color: var(--ink); border-color: var(--ink); }
.nav-theme-btn .ic { width: 16px; height: 16px; }
@media (max-width: 760px) { .nav-links .nav-link { display: none; } }

/* ── Общее меню приложения (после входа) ── */
.app-nav .nav-inner { gap: 14px; }
.app-nav-links { display: flex; align-items: center; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.app-nav-links::-webkit-scrollbar { display: none; }
.app-nav .nav-link { white-space: nowrap; }
.app-nav .nav-link.is-active { color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); }
.app-nav-right { margin-left: auto; display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.app-nav .nav-cta { margin-left: 0; border: none; cursor: pointer; font-family: inherit; }
@media (max-width: 760px) {
  .app-nav .nav-links .nav-link { display: inline-block; }
  .app-nav .nav-name { display: none; }
  .app-nav .nav-inner { padding: 12px 14px; gap: 10px; }
  .app-nav .nav-cta { padding: 9px 13px; font-size: 12.5px; }
}
@media (max-width: 720px) {
  /* «Выход» на телефоне живёт в настройках — в меню он только съедает место */
  .app-nav .app-nav-exit { display: none; }
  .app-nav .nav-link { padding: 7px 9px; font-size: 12px; letter-spacing: .04em; }
  /* растушёванный правый край — видно, что меню можно листать вбок */
  .app-nav-links.can-scroll {
    -webkit-mask-image: linear-gradient(to right, #000 84%, transparent 100%);
    mask-image: linear-gradient(to right, #000 84%, transparent 100%);
  }
}
/* с общим меню экраны занимают остаток окна, а не полный 100vh */
body:has(#app-nav) .screen { min-height: calc(100vh - 60px) !important; }
body:has(#app-nav) .chat-app { min-height: calc(100vh - 96px) !important; }

/* ════════════════ ЛЕНДИНГ ════════════════ */
.hero {
  max-width: 1120px; margin: 0 auto; padding: 92px 28px 76px;
  display: grid; grid-template-columns: 1.08fr .92fr; gap: 64px; align-items: center;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; padding-top: 56px; gap: 44px; } }
.hero-badge { display: block; margin-bottom: 26px; }
.hero-title {
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 600; line-height: 1.06; letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.hero-title em { font-style: italic; font-weight: 600; color: var(--accent); }
.hero-sub { font-size: 17px; line-height: 1.7; color: var(--text2); margin-bottom: 34px; max-width: 470px; }
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text);
  font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none;
  transition: opacity .15s, transform .15s;
}
.btn-primary:hover { opacity: .88; transform: translateY(-1px); }
.btn-primary:active { transform: none; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 2px; border: none; background: none;
  color: var(--text); font-size: 15px; font-weight: 500; cursor: pointer; text-decoration: none;
  border-bottom: 1px solid var(--border); border-radius: 0;
  transition: border-color .15s;
}
.btn-ghost:hover { border-color: var(--ink); }
.hero-stats { display: flex; flex-wrap: wrap; margin-top: 48px; border-top: 1px solid var(--hairline); }
.hero-stat { padding: 18px 34px 0 0; margin-right: 34px; }
.hero-stat + .hero-stat { border-left: 1px solid var(--hairline); padding-left: 34px; }
/* на узком экране три цифры не влезают в строку — уменьшаем отступы */
@media (max-width: 560px) {
  .hero-stat { padding: 16px 14px 0 0; margin-right: 14px; }
  .hero-stat + .hero-stat { padding-left: 14px; }
  .hero-stat b { font-size: 24px; }
  .hero-stat span { font-size: 10px; letter-spacing: .06em; }
}
.hero-stat b { display: block; font-family: var(--font-display); font-size: 30px; font-weight: 600; color: var(--ink); line-height: 1.1; }
.hero-stat span { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--label); }

/* мокап урока в hero */
.hero-mock {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-card); overflow: hidden;
  /* без этого колонка грида растягивается по содержимому
     и на телефоне мокап вылезает за край экрана */
  min-width: 0;
}
.hero > * { min-width: 0; }
.hero-mock .mock-top {
  display: flex; align-items: center; gap: 10px; padding: 13px 18px;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--label);
}
.mock-live { margin-left: auto; display: flex; align-items: center; gap: 6px; color: var(--accent); }
.mock-live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.mock-msgs { display: flex; flex-direction: column; gap: 14px; padding: 20px 18px 22px; }
.mock-msg { display: flex; gap: 10px; align-items: flex-start; }
.mock-msg.user { flex-direction: row-reverse; }
.mock-av {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  border: 1px solid var(--border); color: var(--text2); background: var(--paper);
}
.mock-av.ai { background: var(--btn-ink); color: var(--btn-ink-text); border-color: transparent; }
.mock-bubble { padding: 11px 15px; border-radius: var(--r-md); font-size: 13.5px; line-height: 1.65; max-width: 88%; color: var(--text); }
.mock-msg.ai .mock-bubble { background: var(--paper); border: 1px solid var(--hairline); border-top-left-radius: 3px; }
.mock-msg.user .mock-bubble { background: var(--btn-ink); color: var(--btn-ink-text); border-top-right-radius: 3px; }
.mock-svg { margin-top: 10px; background: #FCFAF4; border-radius: var(--r-sm); border: 1px solid var(--hairline); padding: 10px; }
.mock-svg svg { width: 100%; height: auto; display: block; }

/* секции */
.section { max-width: 1120px; margin: 0 auto; padding: 68px 28px; border-top: 1px solid var(--hairline); }
.section-head { display: flex; align-items: baseline; gap: 22px; margin-bottom: 14px; }
.section-index { font-family: var(--font-mono); font-size: 13px; color: var(--accent); letter-spacing: .06em; }
.section-title { font-size: clamp(26px, 3.2vw, 38px); font-weight: 600; letter-spacing: -0.015em; line-height: 1.15; }
.section-title em { font-style: italic; color: var(--accent); }
.section-sub { font-size: 15.5px; color: var(--text2); line-height: 1.7; max-width: 620px; margin: 10px 0 44px; }

/* фичи: сетка с hairline-разделителями */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline); border-left: 1px solid var(--hairline);
}
@media (max-width: 860px) { .features-grid { grid-template-columns: 1fr; } }
.feature-card {
  padding: 30px 28px 34px; border-right: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
  background: transparent; transition: background .2s;
}
.feature-card:hover { background: var(--card); }
.feature-icon { color: var(--accent); margin-bottom: 18px; }
.feature-icon .ic { width: 26px; height: 26px; stroke-width: 1.4; }
.feature-num { font-family: var(--font-mono); font-size: 11px; color: var(--label); letter-spacing: .1em; display: block; margin-bottom: 18px; }
.feature-card h3 { font-size: 19px; font-weight: 600; margin-bottom: 9px; }
.feature-card p { font-size: 14px; line-height: 1.7; color: var(--text2); }

/* предметы: редакционный индекс-список */
.subj-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; }
@media (max-width: 800px) { .subj-cols { grid-template-columns: 1fr; } }
.subj-index { border-top: 1px solid var(--hairline); }
.subj-row {
  display: flex; align-items: center; gap: 18px; padding: 15px 6px;
  border-bottom: 1px solid var(--hairline); text-decoration: none; color: var(--text);
  transition: padding-left .18s, background .18s;
}
.subj-row:hover { padding-left: 16px; background: var(--card); }
.subj-row .n { font-family: var(--font-mono); font-size: 12px; color: var(--label); width: 26px; flex-shrink: 0; }
.subj-row .name { font-family: var(--font-display); font-size: 19px; font-weight: 600; color: var(--ink); }
.subj-row .note { margin-left: auto; font-size: 13px; color: var(--text2); text-align: right; }
.subj-row .arr { color: var(--accent); opacity: 0; transition: opacity .18s; }
.subj-row:hover .arr { opacity: 1; }
@media (max-width: 640px) { .subj-row .note { display: none; } }

/* шаги */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
@media (max-width: 820px) { .steps-grid { grid-template-columns: 1fr; gap: 30px; } }
.step-card { border-top: 2px solid var(--ink); padding-top: 22px; }
.step-num { font-family: var(--font-mono); font-size: 13px; color: var(--accent); letter-spacing: .08em; display: block; margin-bottom: 14px; }
.step-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 9px; }
.step-card p { font-size: 14px; line-height: 1.7; color: var(--text2); }

/* CTA-полоса */
.cta-band { max-width: 1120px; margin: 0 auto; padding: 0 28px 76px; }
.cta-band-inner {
  border-radius: var(--r-lg); padding: 64px 40px; text-align: center;
  background: var(--btn-ink); color: var(--btn-ink-text);
}
.cta-band-inner h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 600; color: var(--btn-ink-text); margin-bottom: 12px; letter-spacing: -0.015em; }
.cta-band-inner h2 em { font-style: italic; color: #D96B3B; }
body.dark .cta-band-inner h2 em { color: #B4491F; }
.cta-band-inner p { opacity: .72; font-size: 15px; margin-bottom: 30px; }
.btn-white {
  display: inline-block; padding: 14px 30px; border-radius: var(--r-sm);
  background: var(--accent); color: #FCFAF4; font-size: 15px; font-weight: 600; text-decoration: none;
  transition: opacity .15s, transform .15s;
}
.btn-white:hover { opacity: .9; transform: translateY(-1px); }
body.dark .btn-white { color: #FCFAF4; }

/* футер */
.site-footer { border-top: 1px solid var(--hairline); }
.footer-inner { max-width: 1120px; margin: 0 auto; padding: 46px 28px 36px; display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; }
.footer-brand { max-width: 270px; }
.footer-brand p { font-size: 13px; color: var(--text2); line-height: 1.7; margin-top: 14px; }
.footer-col h4 { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--label); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: var(--text2); text-decoration: none; margin-bottom: 9px; transition: color .15s; }
.footer-col a:hover { color: var(--accent); }
.footer-legal-row {
  max-width: 1120px; margin: 0 auto; padding: 0 28px 4px;
  display: flex; flex-wrap: wrap; gap: 6px 24px;
}
.footer-legal-row a { font-size: 13px; color: var(--text2); text-decoration: none; transition: color .15s; }
.footer-legal-row a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1120px; margin: 0 auto; padding: 18px 28px 26px; border-top: 1px solid var(--hairline);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--label);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ════════════════ АВТОРИЗАЦИЯ / КАРТОЧНЫЕ ЭКРАНЫ ════════════════ */
#screen-auth, #screen-onboarding-grade, #screen-onboarding-subjects,
#screen-subjects, #screen-welcome, #screen-exam, #screen-exam-task {
  flex-direction: column; align-items: center; justify-content: center; padding: 24px;
}
.auth-card, .subjects-card, .welcome-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-card); width: 100%; max-width: 430px; padding: 38px 34px;
}
.subjects-card { max-width: 540px; padding: 34px 32px; }
.auth-logo {
  width: 44px; height: 44px; margin: 0 auto 18px; display: grid; place-items: center;
  background: var(--btn-ink); color: var(--btn-ink-text); border-radius: 10px;
  font-family: var(--font-display); font-style: italic; font-weight: 700; font-size: 24px;
}
.auth-title { font-family: var(--font-display); font-size: 27px; font-weight: 700; text-align: center; margin-bottom: 6px; color: var(--ink); }
.auth-sub { font-size: 13.5px; color: var(--text2); text-align: center; margin-bottom: 26px; }
.auth-tabs { display: flex; border: 1px solid var(--border); border-radius: var(--r-sm); padding: 3px; margin-bottom: 22px; gap: 3px; background: var(--paper); }
.auth-tab {
  flex: 1; padding: 8px; border: none; border-radius: 6px; font-size: 13.5px; font-weight: 600;
  cursor: pointer; background: transparent; color: var(--text2); transition: all .18s;
}
.auth-tab.active { background: var(--btn-ink); color: var(--btn-ink-text); }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.field-label {
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; color: var(--label);
  display: block; margin-bottom: 6px; text-transform: uppercase; letter-spacing: .12em;
}
.auth-input {
  width: 100%; padding: 12px 14px; border-radius: var(--r-sm); border: 1px solid var(--border);
  font-size: 14.5px; color: var(--text); background: var(--input-bg); outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.auth-input:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(32,29,23,0.06); }
body.dark .auth-input:focus { box-shadow: 0 0 0 3px rgba(237,231,217,0.08); }
.auth-btn {
  width: 100%; padding: 13px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text);
  font-size: 15px; font-weight: 600; cursor: pointer; margin-top: 6px; transition: opacity .15s;
}
.auth-btn:hover { opacity: .88; }
.auth-error { font-size: 13px; color: var(--err); background: var(--err-bg); padding: 10px 12px; border-radius: var(--r-sm); text-align: center; display: none; }
.auth-home-link { display: block; text-align: center; margin-top: 20px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--label); text-decoration: none; }
.auth-home-link:hover { color: var(--accent); }

/* ════════════════ КАБИНЕТ ════════════════ */
.subjects-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 6px; }
.subjects-greeting { font-family: var(--font-display); font-size: 24px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
/* подпись к списку предметов: сверху над ней теперь стоят «Продолжить» и цель дня */
.subjects-sub { font-size: 14px; color: var(--text2); margin: 26px 0 12px; }
.subjects-list { display: flex; flex-direction: column; margin-bottom: 16px; border-top: 1px solid var(--hairline); }
.subject-item {
  display: flex; align-items: center; justify-content: space-between; padding: 4px 2px;
  border-bottom: 1px solid var(--hairline); transition: background .15s, padding-left .15s;
}
.subject-item:hover { background: var(--paper-2); padding-left: 10px; }
.subject-item-left { display: flex; align-items: center; gap: 13px; cursor: pointer; flex: 1; padding: 12px 0; }
.subject-icon { display: flex; color: var(--accent); }
.subject-icon .ic { width: 19px; height: 19px; stroke-width: 1.5; }
.subject-name { font-family: var(--font-display); font-size: 17.5px; font-weight: 600; color: var(--ink); }
.subject-del {
  background: none; border: none; color: var(--label); cursor: pointer; font-size: 15px;
  padding: 6px 9px; border-radius: 6px; transition: all .15s; line-height: 1;
}
.subject-del:hover { background: var(--err-bg); color: var(--err); }
.add-subject-btn {
  width: 100%; padding: 12px; border: 1px dashed var(--border); border-radius: var(--r-sm);
  background: transparent; color: var(--text2); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.add-subject-btn:hover { border-color: var(--ink); color: var(--ink); }
.add-panel { display: none; margin-top: 14px; background: var(--paper); border-radius: var(--r-md); padding: 16px; border: 1px solid var(--border); }
.add-panel p { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--label); margin-bottom: 12px; }
.subject-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.subject-option {
  padding: 8px 15px; border-radius: 999px; border: 1px solid var(--border); background: var(--card);
  font-size: 13px; font-weight: 500; color: var(--text2); cursor: pointer; transition: all .15s;
}
.subject-option:hover { border-color: var(--ink); color: var(--ink); }
.subjects-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; }
.logout-btn {
  background: none; border: 1px solid var(--border); border-radius: var(--r-sm); padding: 8px 16px;
  font-size: 13px; font-weight: 600; color: var(--text2); cursor: pointer; transition: all .15s;
}
.logout-btn:hover { border-color: var(--err); color: var(--err); }
.icon-btn {
  background: none; border: 1px solid var(--border); border-radius: var(--r-sm);
  width: 36px; height: 36px; cursor: pointer; color: var(--text2);
  display: flex; align-items: center; justify-content: center; transition: all .15s;
}
.icon-btn:hover { color: var(--ink); border-color: var(--ink); }
.icon-btn .ic { width: 17px; height: 17px; }

.exam-nav-btn, .lang-nav-btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: var(--r-sm); padding: 9px 17px;
  font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .15s;
  text-decoration: none;
}
.exam-nav-btn { background: var(--btn-ink); color: var(--btn-ink-text); border: 1px solid transparent; }
.exam-nav-btn:hover { opacity: .88; }
.lang-nav-btn { background: transparent; color: var(--ink); border: 1px solid var(--border); }
.lang-nav-btn:hover { border-color: var(--ink); }

/* ════════════════ ПРИВЕТСТВИЕ ПРЕДМЕТА ════════════════ */
.welcome-card { text-align: center; padding: 44px 36px; }
.welcome-emoji { display: flex; justify-content: center; margin-bottom: 20px; color: var(--accent); }
.welcome-emoji .ic { width: 42px; height: 42px; stroke-width: 1.2; }
.welcome-title { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin-bottom: 14px; color: var(--ink); letter-spacing: -0.01em; }
.welcome-text { font-size: 15px; color: var(--text2); line-height: 1.75; margin-bottom: 30px; }
.welcome-btn {
  padding: 14px 34px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text);
  font-size: 15px; font-weight: 600; cursor: pointer; transition: opacity .15s, transform .15s;
}
.welcome-btn:hover { opacity: .88; transform: translateY(-1px); }
.welcome-btn:disabled { opacity: .35; cursor: not-allowed; transform: none; }

/* ════════════════ ОНБОРДИНГ ════════════════ */
.onb-grade-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; margin-bottom: 4px; }
.onb-grade-opt {
  padding: 13px 4px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card);
  font-family: var(--font-mono); font-size: 14px; font-weight: 500; color: var(--text2);
  cursor: pointer; text-align: center; transition: all .15s;
}
.onb-grade-opt:hover { border-color: var(--ink); color: var(--ink); }
.onb-grade-opt.selected { border-color: transparent; background: var(--btn-ink); color: var(--btn-ink-text); }
.onb-subject-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.onb-subject-opt {
  padding: 9px 17px; border-radius: 999px; border: 1px solid var(--border); background: var(--card);
  font-size: 13.5px; font-weight: 500; color: var(--text2); cursor: pointer; transition: all .15s;
}
.onb-subject-opt:hover { border-color: var(--ink); color: var(--ink); }
.onb-subject-opt.selected { border-color: transparent; background: var(--btn-ink); color: var(--btn-ink-text); }

/* ════════════════ ЧАТ ════════════════ */
#screen-chat, #screen-exam-chat, #screen-theory { flex-direction: column; align-items: center; justify-content: flex-start; padding: 18px; }
.chat-app {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-card); width: 100%; max-width: 680px;
  display: flex; flex-direction: column; min-height: calc(100vh - 36px); overflow: hidden;
}
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--hairline); flex-shrink: 0; }
.topbar-left { display: flex; align-items: center; gap: 12px; }
.back-btn {
  background: none; border: 1px solid var(--border); border-radius: var(--r-sm);
  width: 34px; height: 34px; cursor: pointer; font-size: 15px; color: var(--text2);
  display: flex; align-items: center; justify-content: center; transition: all .15s; text-decoration: none;
}
.back-btn:hover { color: var(--ink); border-color: var(--ink); }
.topbar-subject { font-family: var(--font-display); font-size: 17px; font-weight: 700; color: var(--ink); display: flex; align-items: center; gap: 9px; }
.topbar-subject .ic { color: var(--accent); width: 18px; height: 18px; }
.topbar-right { display: flex; gap: 8px; align-items: center; }
.stabs-bar { display: flex; gap: 6px; padding: 10px 16px; overflow-x: auto; flex-shrink: 0; border-bottom: 1px solid var(--hairline); }
.stabs-bar::-webkit-scrollbar { height: 0; }
.stab {
  padding: 6px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); background: transparent; color: var(--text2); white-space: nowrap; transition: all .15s;
}
.stab:hover { color: var(--ink); border-color: var(--ink); }
.stab.active { background: var(--btn-ink); color: var(--btn-ink-text); border-color: transparent; }
.qbtns { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 16px; flex-shrink: 0; border-bottom: 1px solid var(--hairline); }
.qbtn {
  padding: 6px 12px; font-size: 12.5px; border-radius: var(--r-sm); cursor: pointer;
  border: 1px solid var(--hairline); background: transparent; color: var(--text2); transition: all .15s; font-weight: 500;
}
.qbtn:hover { color: var(--accent); border-color: var(--accent); }
.chat { flex: 1; overflow-y: auto; padding: 18px 16px; display: flex; flex-direction: column; gap: 14px; background: var(--chat-bg); }
.msg { display: flex; gap: 10px; align-items: flex-start; }
.msg.user { flex-direction: row-reverse; }
.av {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 15px; overflow: hidden;
}
.av.ai { background: var(--btn-ink); color: var(--btn-ink-text); font-family: var(--font-mono); font-size: 9.5px; font-weight: 600; letter-spacing: .04em; }
.av.user { background: var(--av-user-bg); }
.av img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.bubble { padding: 11px 15px; border-radius: var(--r-md); font-size: 14px; line-height: 1.7; max-width: 85%; color: var(--text); }
.msg.ai .bubble { background: var(--bubble-ai); border: 1px solid var(--bubble-ai-border); border-top-left-radius: 3px; box-shadow: var(--shadow-card); }
.msg.user .bubble { background: var(--btn-ink); color: var(--btn-ink-text); border-top-right-radius: 3px; }
/* сообщение об ошибке связи — сразу видно, что это не ответ репетитора */
.msg.msg-err .bubble { background: color-mix(in srgb, var(--err) 8%, var(--bubble-ai)); border-color: var(--err); }
.input-area { padding: 12px 16px; border-top: 1px solid var(--hairline); display: flex; gap: 8px; align-items: flex-end; flex-shrink: 0; background: var(--card); }
.input-area textarea {
  flex: 1; padding: 11px 14px; font-size: 14px; border-radius: var(--r-sm); border: 1px solid var(--border);
  background: var(--input-bg); color: var(--text); resize: none; min-height: 44px; max-height: 120px;
  line-height: 1.5; outline: none; transition: border-color .15s;
}
.input-area textarea:focus { border-color: var(--ink); }
.sbtn {
  width: 44px; height: 44px; border-radius: var(--r-sm); border: none;
  background: var(--btn-ink); color: var(--btn-ink-text); cursor: pointer;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: opacity .15s;
}
.sbtn:hover { opacity: .88; }
.sbtn:disabled { opacity: .35; cursor: not-allowed; }
.sbtn .ic { width: 18px; height: 18px; }
/* ── ФОТО ЗАДАЧИ В ЧАТ ── */
.photo-btn { background: var(--paper-2); color: var(--text); border: 1px solid var(--border); }
.photo-btn:hover { background: var(--card); opacity: 1; }
.photo-btn .ic { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linejoin: round; stroke-linecap: round; }
.photo-preview {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
  margin: 0 16px; padding: 10px 12px; border: 1px dashed var(--border);
  border-radius: var(--r-sm); background: var(--paper-2);
}
.photo-preview img { width: 54px; height: 54px; object-fit: cover; border-radius: 6px; border: 1px solid var(--hairline); }
.photo-preview-txt { flex: 1; font-size: 13px; line-height: 1.45; color: var(--text); }
.photo-preview-txt span { color: var(--text2); font-size: 12px; }
.photo-drop {
  width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--card); color: var(--text2); cursor: pointer; flex-shrink: 0; font-size: 14px; line-height: 1;
}
.photo-drop:hover { color: var(--err); border-color: var(--err); }
.msg-photo { display: block; max-width: 260px; width: 100%; border-radius: 8px; margin-bottom: 8px; }
@media (max-width: 560px) { .msg-photo { max-width: 190px; } }

.status { font-size: 12px; padding: 3px 16px 7px; color: var(--text2); flex-shrink: 0; min-height: 22px; font-family: var(--font-mono); }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }

/* стрик */
.streak-badge {
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 13px;
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; color: var(--text);
}
.streak-badge .ic { width: 13px; height: 13px; color: var(--accent); }

/* печатает… */
.typing { display: flex; gap: 4px; align-items: center; padding: 4px 0; }
.dot { width: 5px; height: 5px; border-radius: 50%; background: var(--label); animation: bop 1.2s infinite; }
.dot:nth-child(2) { animation-delay: .2s; }
.dot:nth-child(3) { animation-delay: .4s; }
@keyframes bop { 0%,60%,100%{transform:translateY(0);opacity:.4} 30%{transform:translateY(-6px);opacity:1} }

/* ════════════════ ТЕСТЫ / ТРЕНАЖЁР ════════════════ */
.quiz-btn-wrap { text-align: center; margin: 6px 0 10px; }
.quiz-start-btn {
  background: var(--btn-ink); color: var(--btn-ink-text); border: none; border-radius: var(--r-sm);
  padding: 11px 24px; font-size: 13.5px; font-weight: 600; cursor: pointer; transition: opacity .15s;
}
.quiz-start-btn:hover { opacity: .88; }
.quiz-cards { margin: 6px 0 10px; }
.quiz-header {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; padding: 11px 15px;
  background: var(--card); border: 1px solid var(--hairline); border-left: 2px solid var(--accent); border-radius: var(--r-sm);
}
.quiz-header strong { color: var(--ink); }
.quiz-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); padding: 18px; margin-bottom: 10px; box-shadow: var(--shadow-card); }
.quiz-qnum { font-family: var(--font-mono); font-size: 10.5px; color: var(--label); text-transform: uppercase; letter-spacing: .12em; margin-bottom: 10px; }
.quiz-qtext { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 14px; line-height: 1.6; }
.quiz-input {
  width: 100%; padding: 11px 14px; border-radius: var(--r-sm); border: 1px solid var(--border);
  font-size: 14px; outline: none; color: var(--text); background: var(--input-bg); margin-bottom: 10px;
  transition: border-color .15s;
}
.quiz-input:focus { border-color: var(--ink); }
.quiz-input:disabled { opacity: .55; }
.choice-row { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.choice-label {
  display: flex; align-items: center; gap: 10px; font-size: 14px; cursor: pointer;
  padding: 10px 13px; border-radius: var(--r-sm); border: 1px solid var(--border); color: var(--text); transition: border-color .12s;
}
.choice-label:hover { border-color: var(--ink); }
.choice-label input { accent-color: var(--accent); }
.quiz-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.quiz-check-btn {
  background: var(--btn-ink); color: var(--btn-ink-text); border: none; border-radius: var(--r-sm);
  padding: 10px 22px; font-size: 13px; font-weight: 600; cursor: pointer; transition: opacity .15s;
}
.quiz-check-btn:hover { opacity: .88; }
.quiz-check-btn:disabled { opacity: .35; cursor: not-allowed; }
.quiz-nav-btn {
  background: transparent; color: var(--text); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 10px 16px; font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.quiz-nav-btn:hover { border-color: var(--ink); }
.quiz-feedback { font-size: 13.5px; font-weight: 500; min-height: 0; line-height: 1.6; }
.quiz-feedback.correct { color: var(--ok); padding: 10px 13px; background: var(--ok-bg); border-radius: var(--r-sm); margin-top: 4px; }
.quiz-feedback.wrong { color: var(--err); padding: 10px 13px; background: var(--err-bg); border-radius: var(--r-sm); margin-top: 4px; }
.ex-lamp {
  display: inline-flex; align-items: center; justify-content: center; vertical-align: middle;
  width: 26px; height: 26px; margin-left: 8px; padding: 0; cursor: pointer;
  border: 1px solid currentColor; border-radius: 50%; background: transparent; color: inherit;
  transition: transform .15s, background .15s;
}
.ex-lamp:hover { transform: scale(1.12); }
.ex-lamp .ic { width: 14px; height: 14px; stroke-width: 1.9; }
.ex-expl {
  margin-top: 8px; padding: 11px 14px; font-size: 13.5px; line-height: 1.65; font-weight: 500;
  color: var(--text); background: var(--accent-soft, rgba(180,73,31,0.07));
  border: 1px dashed var(--accent, #B4491F); border-radius: var(--r-sm);
}
.ex-expl .ic-s { width: 13px; height: 13px; vertical-align: -2px; color: var(--accent, #B4491F); }
.quiz-summary {
  text-align: center; font-family: var(--font-display); font-size: 17px; font-weight: 600; color: var(--ink);
  padding: 18px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); margin-top: 8px;
}
.svg-wrap { margin-top: 14px; background: #FCFAF4; border-radius: var(--r-sm); padding: 14px 12px; display: block; border: 1px solid var(--hairline); overflow: hidden; }
.svg-wrap svg { width: 100%; height: auto; display: block; max-width: 500px; margin: 0 auto; }

.task-card {
  background: var(--card); border: 1px solid var(--hairline); border-left: 2px solid var(--accent);
  border-radius: var(--r-sm); padding: 14px 17px; margin-bottom: 8px; font-size: 14px; color: var(--text); line-height: 1.7;
}
.task-card strong { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.next-task-btn {
  display: inline-block; margin-top: 10px; padding: 10px 20px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text); font-size: 13px; font-weight: 600; cursor: pointer; transition: opacity .15s;
}
.next-task-btn:hover { opacity: .88; }
.learn-btn {
  display: inline-block; margin-top: 8px; padding: 10px 20px; border: 1px solid var(--border); border-radius: var(--r-sm);
  background: transparent; color: var(--text); font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.learn-btn:hover { border-color: var(--ink); }
.result-card { text-align: center; padding: 24px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); margin: 8px 0; }
.result-card .result-score { font-family: var(--font-display); font-size: 40px; font-weight: 700; color: var(--ink); }
.result-card p { font-size: 14px; color: var(--text2); margin-top: 6px; }

/* ════════════════ ЭКЗАМЕНЫ ════════════════ */
.exam-type-btn {
  flex: 1; padding: 12px; border: 1px solid var(--border); border-radius: var(--r-sm);
  font-family: var(--font-mono); font-size: 14px; font-weight: 600; letter-spacing: .1em;
  cursor: pointer; background: transparent; color: var(--text2); transition: all .18s;
}
.exam-type-btn.active { border-color: transparent; background: var(--btn-ink); color: var(--btn-ink-text); }
.exam-task-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 4px; }
.exam-task-num {
  padding: 14px 8px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card);
  font-family: var(--font-mono); font-size: 14px; font-weight: 500; color: var(--text2);
  cursor: pointer; text-align: center; transition: all .15s;
}
.exam-task-num:hover { border-color: var(--ink); color: var(--ink); background: var(--paper-2); }
/* цвет номера показывает, как задание давалось в прошлый раз */
.exam-task-num { position: relative; }
.exam-task-num.is-ok  { border-color: var(--ok); color: var(--ok); background: color-mix(in srgb, var(--ok) 8%, transparent); }
.exam-task-num.is-bad { border-color: var(--err); color: var(--err); background: color-mix(in srgb, var(--err) 8%, transparent); }
.exam-task-num.is-ok::after, .exam-task-num.is-bad::after {
  content: ''; position: absolute; top: 6px; right: 6px; width: 5px; height: 5px; border-radius: 50%;
  background: currentColor;
}
.exam-legend {
  display: flex; flex-wrap: wrap; gap: 14px; margin: 12px 0 2px;
  font-size: 12.5px; color: var(--text2);
}
.exam-legend span { display: inline-flex; align-items: center; gap: 6px; }
.exam-legend i { width: 9px; height: 9px; border-radius: 50%; border: 1px solid var(--border); }
.exam-legend i.ok  { background: var(--ok);  border-color: var(--ok); }
.exam-legend i.bad { background: var(--err); border-color: var(--err); }
.exam-summary {
  margin: 2px 0 14px; padding: 12px 14px; border-radius: var(--r-sm);
  background: var(--paper-2); border: 1px solid var(--hairline);
  font-size: 13.5px; color: var(--text); line-height: 1.55;
}
.exam-summary b { font-weight: 600; }

/* ── ПРОБНИК ЦЕЛИКОМ (mock.html) ─────────────────────────────── */
.mock-wrap { max-width: 760px; margin: 0 auto; padding: 0 16px 60px; }
.mock-bar {
  /* липнет под шапкой сайта, а не под ней самой — высоту шапки ставит скрипт */
  position: sticky; top: var(--nav-h, 67px); z-index: 30; display: flex; align-items: center; gap: 12px;
  margin: 0 -16px 18px; padding: 12px 16px;
  background: var(--paper); border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}
.mock-clock {
  font-family: var(--font-mono); font-size: 22px; font-weight: 600; color: var(--text);
  letter-spacing: .5px; font-variant-numeric: tabular-nums;
}
.mock-bar-sub { font-size: 12.5px; color: var(--text2); }
.mock-bar-fill { flex: 1; }
.mock-bar.is-low { background: color-mix(in srgb, var(--err) 10%, var(--paper)); border-bottom-color: var(--err); }
.mock-bar.is-low .mock-clock, .mock-bar.is-low .mock-bar-sub { color: var(--err); }

.mock-card { margin-bottom: 16px; }
.mock-card h2 { margin: 8px 0 10px; font-family: var(--font-display); font-size: 26px; }
.mock-card p { font-size: 14px; line-height: 1.65; color: var(--text2); margin: 0 0 10px; }

.mock-choice { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.mock-choice .done-btn, .mock-choice .quiz-nav-btn { flex: 1 1 220px; }

.mock-task { margin-bottom: 14px; border-left: 3px solid transparent; }
.mock-task.is-ok  { border-left-color: var(--ok); }
.mock-task.is-bad { border-left-color: var(--err); }

.mock-progress {
  display: block; height: 6px; margin: 14px auto 0; max-width: 320px;
  border-radius: 999px; background: var(--paper-2); border: 1px solid var(--hairline); overflow: hidden;
}
.mock-progress i { display: block; height: 100%; background: var(--accent); transition: width .3s; }

.mock-ans {
  display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 10px; padding-top: 10px;
  border-top: 1px dashed var(--hairline); font-size: 13.5px; color: var(--text2);
}
.mock-ans b { color: var(--text); font-weight: 600; }

@media (max-width: 560px) {
  .mock-bar { top: var(--nav-h, 61px); }
  .mock-clock { font-size: 19px; }
  .mock-card h2 { font-size: 22px; }
  .mock-choice .done-btn, .mock-choice .quiz-nav-btn { flex: 1 1 100%; }
}

.theory-open-btn {
  display: block; width: 100%; margin: 0 0 16px; padding: 13px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text); font-size: 14px; font-weight: 600;
  cursor: pointer; text-align: center; text-decoration: none; transition: opacity .15s;
}
.theory-open-btn:hover { opacity: .88; }
.theory-task-link {
  display: inline-block; margin-top: 6px; padding: 8px 15px; border-radius: var(--r-sm);
  border: 1px solid var(--accent); background: transparent; color: var(--accent);
  font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.theory-task-link:hover { background: var(--accent); color: #FCFAF4; }

/* ════════════════ ТЕОРИЯ ════════════════ */
.theory-toc { display: flex; gap: 6px; padding: 12px 16px; overflow-x: auto; flex-shrink: 0; border-bottom: 1px solid var(--hairline); }
.theory-toc::-webkit-scrollbar { height: 0; }
.toc-chip {
  padding: 6px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 500; cursor: pointer;
  border: 1px solid var(--border); background: transparent; color: var(--text2); white-space: nowrap; transition: all .15s;
}
.toc-chip:hover { color: var(--accent); border-color: var(--accent); }
/* выбор предмета, когда теорию открыли без параметров */
.theory-block.pick h3::before { content: none; }
.theory-pick { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.theory-pick .toc-chip { text-decoration: none; padding: 9px 16px; font-size: 13.5px; }
.theory-body { flex: 1; overflow-y: auto; padding: 8px 24px 28px; background: var(--chat-bg); }
.theory-block { padding: 22px 0; border-bottom: 1px solid var(--hairline); scroll-margin-top: 8px; }
.theory-block:last-child { border-bottom: none; }
.theory-block h3 {
  font-family: var(--font-display); font-size: 19px; font-weight: 700; color: var(--ink);
  margin-bottom: 12px; display: flex; align-items: baseline; gap: 10px;
}
.theory-block h3::before { content: "§"; color: var(--accent); font-size: 15px; }
.theory-block p { font-size: 14.5px; line-height: 1.8; color: var(--text); margin: 0 0 10px; }
.theory-block ul { margin: 0 0 10px; padding-left: 20px; }
.theory-block li { font-size: 14.5px; line-height: 1.75; color: var(--text); margin-bottom: 5px; }
.theory-block b { color: var(--ink); font-weight: 700; }
.theory-block i { color: var(--text2); }
.theory-block table { border-collapse: collapse; margin: 6px 0 12px; }
.theory-block td { border: 1px solid var(--border); padding: 6px 10px; font-size: 14px; }

/* ════════════════ МОДАЛКА НАСТРОЕК ════════════════ */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(24,21,16,0.45); z-index: 1000;
  align-items: center; justify-content: center; padding: 20px;
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
}
.modal-overlay.open { display: flex; }
.modal-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  width: 100%; max-width: 440px; max-height: 90vh; overflow-y: auto; padding: 26px; box-shadow: var(--shadow-pop);
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.modal-title { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--ink); }
.modal-close {
  background: none; border: 1px solid var(--border); border-radius: var(--r-sm);
  width: 34px; height: 34px; font-size: 14px; cursor: pointer; color: var(--text2);
  display: flex; align-items: center; justify-content: center; transition: all .15s;
}
.modal-close:hover { color: var(--err); border-color: var(--err); }
.modal-section { padding: 18px 0; border-top: 1px solid var(--hairline); display: flex; flex-direction: column; gap: 10px; }
.modal-section:first-of-type { border-top: none; }
.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.settings-label { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--label); }
.modal-grade-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.modal-grade-opt {
  padding: 9px 4px; border-radius: var(--r-sm); border: 1px solid var(--border); background: transparent;
  font-family: var(--font-mono); font-size: 13px; color: var(--text2); cursor: pointer; text-align: center; transition: all .15s;
}
.modal-grade-opt:hover { border-color: var(--ink); color: var(--ink); }
.modal-grade-opt.selected { border-color: transparent; background: var(--btn-ink); color: var(--btn-ink-text); }
.toggle { position: relative; display: inline-block; width: 42px; height: 24px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; cursor: pointer; inset: 0; background: var(--border); border-radius: 24px; transition: .25s; }
.toggle-slider:before { content: ""; position: absolute; width: 18px; height: 18px; left: 3px; bottom: 3px; background: var(--card); border-radius: 50%; transition: .25s; }
input:checked + .toggle-slider { background: var(--accent); }
input:checked + .toggle-slider:before { transform: translateX(18px); }
.avatar-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.av-opt { font-size: 21px; cursor: pointer; padding: 4px; border-radius: var(--r-sm); border: 1.5px solid transparent; transition: all .15s; line-height: 1; }
.av-opt:hover { background: var(--paper-2); }
.av-opt.selected { border-color: var(--accent); background: var(--accent-light); }
.upload-av-btn {
  display: inline-block; padding: 10px 14px; border: 1px dashed var(--border); border-radius: var(--r-sm);
  background: transparent; color: var(--text2); font-size: 13px; font-weight: 600; cursor: pointer; text-align: center; transition: all .15s;
}
.upload-av-btn:hover { border-color: var(--ink); color: var(--ink); }
.api-input {
  flex: 1; padding: 9px 12px; border-radius: var(--r-sm); border: 1px solid var(--border);
  font-size: 12px; font-family: var(--font-mono); color: var(--text); background: var(--input-bg); outline: none;
}
.api-input:focus { border-color: var(--ink); }
.modal-btn {
  width: 100%; padding: 10px; border: none; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text); font-size: 13px; font-weight: 600; cursor: pointer; transition: opacity .15s;
}
.modal-btn:hover { opacity: .88; }
.stat-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 6px; }
.stat-cell { border: 1px solid var(--border); border-radius: var(--r-md); padding: 16px 12px; text-align: center; }
.stat-cell .num { font-family: var(--font-display); font-size: 30px; font-weight: 700; color: var(--ink); line-height: 1.1; display: flex; align-items: center; justify-content: center; gap: 8px; }
.stat-cell .num .ic { width: 18px; height: 18px; color: var(--accent); }
.stat-cell .cap { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--label); margin-top: 7px; }
.stat-cell .sub { font-size: 11.5px; color: var(--text2); margin-top: 6px; line-height: 1.5; }

/* ════════════════ ЯЗЫКИ ════════════════ */
#screen-lang-picker { flex-direction: column; align-items: center; justify-content: center; padding: 24px; }
.lang-picker-card {
  width: 100%; max-width: 470px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--r-lg); box-shadow: var(--shadow-card); padding: 28px;
}
.lang-picker-head { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.lang-picker-title { font-family: var(--font-display); font-size: 23px; font-weight: 700; color: var(--ink); }
.lang-picker-sub { font-size: 13px; color: var(--text2); margin-top: 2px; }
.lang-choice {
  display: flex; align-items: center; gap: 16px; width: 100%; text-align: left;
  padding: 16px 4px; border: none; border-bottom: 1px solid var(--hairline);
  background: transparent; cursor: pointer; text-decoration: none;
  transition: padding-left .18s, background .18s;
}
.lang-choice:first-of-type { border-top: 1px solid var(--hairline); }
.lang-choice:hover { padding-left: 14px; background: var(--paper-2); }
.lang-flag {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; letter-spacing: .08em;
  color: var(--accent); border: 1px solid var(--border); border-radius: 6px; padding: 7px 9px; flex-shrink: 0;
}
.lang-choice-text { display: flex; flex-direction: column; flex: 1; gap: 2px; }
.lang-choice-text b { font-family: var(--font-display); font-size: 17.5px; font-weight: 600; color: var(--ink); }
.lang-choice-text small { font-size: 12.5px; color: var(--text2); }
.lang-choice-go { font-size: 17px; color: var(--accent); opacity: 0; transition: opacity .18s; }
.lang-choice:hover .lang-choice-go { opacity: 1; }

.lang-topbar { display: flex; align-items: center; gap: 12px; padding: 13px 18px; background: var(--card); border-bottom: 1px solid var(--hairline); flex-shrink: 0; }
.lang-topbar .topbar-subject { font-size: 17px; }

/* ════════════════ КУРС ЯЗЫКА ════════════════ */
.course-wrap { width: 100%; max-width: 760px; margin: 0 auto; padding: 30px 20px 48px; }
.course-hero { border-bottom: 2px solid var(--ink); padding-bottom: 26px; margin-bottom: 26px; }
.course-hero .eyebrow { display: block; margin-bottom: 12px; color: var(--accent); }
.course-hero h1 { font-size: clamp(28px, 4vw, 38px); font-weight: 700; letter-spacing: -0.015em; margin-bottom: 10px; }
.course-hero p { font-size: 15px; line-height: 1.7; color: var(--text2); max-width: 560px; }
.course-grid { display: grid; gap: 14px; }
.course-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); padding: 22px 24px; box-shadow: var(--shadow-card); }
.course-kicker { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 10px; }
.course-card h2 { font-family: var(--font-display); font-size: 21px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.course-card > p { font-size: 14px; line-height: 1.65; color: var(--text2); margin-bottom: 8px; }
.course-vocab { display: flex; flex-direction: column; margin: 12px 0 6px; border-top: 1px solid var(--hairline); }
.vocab-row { display: flex; align-items: center; gap: 12px; padding: 9px 2px; border-bottom: 1px solid var(--hairline); }
.vocab-say { background: none; border: none; cursor: pointer; color: var(--label); flex-shrink: 0; transition: color .15s, background .15s, transform .1s; width: 36px; height: 36px; margin: -7px -6px; padding: 0; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; vertical-align: middle; -webkit-tap-highlight-color: transparent; }
.vocab-say:hover { color: var(--accent); background: var(--accent-light); }
.vocab-say:active { transform: scale(.9); }
.vocab-say .ic { width: 21px; height: 21px; }
.vocab-term { font-size: 14.5px; font-weight: 600; color: var(--ink); }
.vocab-ru { font-size: 13px; color: var(--text2); margin-left: auto; text-align: right; }
.course-box { margin-top: 10px; padding: 12px 15px; border-radius: var(--r-sm); background: var(--paper); border: 1px solid var(--hairline); font-size: 13.5px; line-height: 1.65; color: var(--text); }
.course-box b { color: var(--accent); font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; font-weight: 600; }
.course-check { margin-top: 10px; }
.course-check .quiz-input { margin-bottom: 8px; }
.course-note { font-size: 12px; color: var(--label); text-align: center; margin-top: 26px; font-family: var(--font-mono); }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}

/* ════════════════ УПРАЖНЕНИЯ В КУРСАХ ЯЗЫКОВ ════════════════ */

/* оглавление уроков */
.course-toc { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 22px; }

/* теоретический блок */
.course-theory { margin: 16px 0 6px; padding: 16px 18px; background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--r-md); }
.course-theory h3 { font-family: var(--font-display); font-size: 16.5px; font-weight: 700; color: var(--ink); margin-bottom: 10px; display: flex; align-items: baseline; gap: 8px; }
.course-theory h3::before { content: "§"; color: var(--accent); font-size: 13px; }
.course-theory p { font-size: 14px; line-height: 1.75; color: var(--text); margin: 0 0 8px; }
.course-theory ul, .course-theory ol { margin: 0 0 8px; padding-left: 20px; }
.course-theory li { font-size: 14px; line-height: 1.7; color: var(--text); margin-bottom: 5px; }
.course-theory b { color: var(--ink); }
.course-theory i { color: var(--text2); }
.course-theory table { border-collapse: collapse; width: 100%; margin: 8px 0 4px; font-size: 13px; }
.course-theory th { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--label); text-align: left; padding: 7px 10px; border-bottom: 1.5px solid var(--border); }
.course-theory td { padding: 6.5px 10px; border-bottom: 1px solid var(--hairline); color: var(--text); line-height: 1.5; vertical-align: top; }
.course-theory tr:last-child td { border-bottom: none; }

/* транскрипция в лексике */
.vocab-tr { font-family: var(--font-mono); font-size: 12px; color: var(--accent); white-space: nowrap; }

/* блок упражнения */
.ex-divider { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--label); margin: 20px 0 10px; padding-top: 14px; border-top: 1.5px solid var(--border); }
.ex-block { margin: 10px 0; padding: 16px 18px; background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--r-md); }
.ex-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 10px; }
.ex-num { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.ex-kind { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--label); }
.ex-q { font-size: 14.5px; font-weight: 500; color: var(--text); line-height: 1.6; margin-bottom: 12px; }
.ex-note { font-size: 12.5px; color: var(--text2); line-height: 1.55; }

/* выбор ответа */
.ex-opts { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.ex-opt { text-align: left; padding: 11px 14px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card); color: var(--text); font-size: 14px; font-weight: 500; cursor: pointer; transition: border-color .13s, background .13s; }
.ex-opt:hover:not(:disabled) { border-color: var(--ink); }
.ex-opt:disabled { cursor: default; opacity: .75; }
.ex-opt.correct { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); opacity: 1; font-weight: 600; }
.ex-opt.wrong { border-color: var(--err); background: var(--err-bg); color: var(--err); opacity: 1; }

/* карточки (flip) */
.flash-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 4px; }
.flash-card { position: relative; min-height: 84px; border-radius: var(--r-md); border: 1px solid var(--border); background: var(--card); cursor: pointer; padding: 12px; display: grid; place-items: center; transition: border-color .15s, transform .15s; }
.flash-card:hover { border-color: var(--ink); transform: translateY(-2px); }
.flash-front { font-family: var(--font-display); font-size: 17px; font-weight: 700; color: var(--ink); text-align: center; }
.flash-back { display: none; font-size: 13.5px; font-weight: 500; color: var(--accent); text-align: center; }
.flash-card.flipped { border-color: var(--accent); background: var(--accent-light); }
.flash-card.flipped .flash-front { display: none; }
.flash-card.flipped .flash-back { display: block; }
.flash-card::after { content: "↻"; position: absolute; top: 6px; right: 9px; font-size: 11px; color: var(--label); }

/* сопоставление */
.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; margin-bottom: 8px; }
.match-col { display: flex; flex-direction: column; gap: 8px; }
.match-btn { padding: 11px 13px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card); color: var(--text); font-size: 13.5px; font-weight: 500; cursor: pointer; text-align: center; transition: all .14s; }
.match-btn:hover:not(:disabled) { border-color: var(--ink); }
.match-btn.selected { border-color: var(--ink); background: var(--btn-ink); color: var(--btn-ink-text); }
.match-btn.done { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); cursor: default; }
.match-btn.wrong { border-color: var(--err); background: var(--err-bg); color: var(--err); }

/* аудирование */
.ex-listen-btn { display: inline-flex; align-items: center; gap: 9px; padding: 11px 20px; margin-bottom: 12px; border: none; border-radius: var(--r-sm); background: var(--btn-ink); color: var(--btn-ink-text); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: opacity .15s; }
.ex-listen-btn:hover { opacity: .88; }
.ex-listen-btn .ic { width: 16px; height: 16px; }

/* ════════════════ БРАУЗЕР УРОКОВ (большие курсы) ════════════════ */
.lesson-block { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); margin-bottom: 10px; overflow: hidden; }
.lesson-block summary { display: flex; align-items: baseline; gap: 14px; padding: 14px 18px; cursor: pointer; list-style: none; user-select: none; }
.lesson-block summary::-webkit-details-marker { display: none; }
.lesson-block summary::after { content: "+"; margin-left: auto; font-family: var(--font-mono); font-size: 15px; color: var(--label); }
.lesson-block[open] summary::after { content: "−"; }
.lesson-block[open] summary { border-bottom: 1px solid var(--hairline); }
.lb-num { font-family: var(--font-display); font-size: 17px; font-weight: 700; color: var(--ink); }
.lb-info { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--label); }
.lesson-row { display: flex; align-items: center; gap: 13px; width: 100%; text-align: left; padding: 10.5px 18px; border: none; border-bottom: 1px solid var(--hairline); background: transparent; cursor: pointer; transition: background .13s, padding-left .13s; }
.lesson-row:last-child { border-bottom: none; }
.lesson-row:hover { background: var(--paper-2); padding-left: 26px; }
.lr-n { font-family: var(--font-mono); font-size: 11px; color: var(--label); flex-shrink: 0; }
.lr-title { font-size: 14px; font-weight: 500; color: var(--text); line-height: 1.4; }
.lr-type { margin-left: auto; font-family: var(--font-mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--label); flex-shrink: 0; }
.lr-check { font-size: 13px; color: var(--ok); opacity: 0; flex-shrink: 0; width: 14px; }
.lesson-row.done .lr-check { opacity: 1; }
.lesson-row.done .lr-title { color: var(--text2); }

/* открытый урок */
.lesson-open-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 4px; flex-wrap: wrap; }
.lesson-open h2 { font-size: 24px; margin: 4px 0 14px; }
.course-section { margin: 16px 0; }
.sec-title { font-family: var(--font-display); font-size: 16.5px; font-weight: 700; color: var(--ink); margin-bottom: 10px; display: flex; align-items: baseline; gap: 8px; }
.sec-title::before { content: "§"; color: var(--accent); font-size: 13px; }
.vocab-gender { font-family: var(--font-mono); font-size: 10px; color: var(--accent); border: 1px solid var(--border); border-radius: 4px; padding: 1px 5px; vertical-align: 2px; }
.gram-html { font-size: 14px; line-height: 1.75; color: var(--text); margin: 6px 0; }
.gram-html table { border-collapse: collapse; width: 100%; margin: 8px 0; font-size: 13px; }
.gram-html td, .gram-html th { padding: 6px 10px; border-bottom: 1px solid var(--hairline); text-align: left; }
.gram-html b { color: var(--ink); }

/* диалог */
.dialog-line { display: flex; gap: 12px; align-items: baseline; padding: 7px 0; border-bottom: 1px solid var(--hairline); }
.dialog-line:last-child { border-bottom: none; }
.dsp { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); flex-shrink: 0; min-width: 74px; }
.dbubble { font-size: 14.5px; line-height: 1.65; color: var(--text); }
.dbubble .vocab-say { vertical-align: -11px; }

/* чтение */
.read-text { font-size: 15px; line-height: 1.85; color: var(--text); padding: 14px 17px; background: var(--paper); border: 1px solid var(--hairline); border-left: 2px solid var(--accent); border-radius: var(--r-sm); }

/* алфавит */
.alpha-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(74px, 1fr)); gap: 8px; }
.alpha { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 10px 6px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card); cursor: pointer; transition: border-color .13s, transform .13s; }
.alpha:hover { border-color: var(--accent); transform: translateY(-2px); }
.alpha b { font-family: var(--font-display); font-size: 18px; color: var(--ink); }
.alpha span { font-family: var(--font-mono); font-size: 10px; color: var(--text2); }

/* свободный ответ */
.ex-open { width: 100%; padding: 11px 14px; border-radius: var(--r-sm); border: 1px solid var(--border); font-size: 14px; font-family: var(--font-ui); color: var(--text); background: var(--input-bg); outline: none; resize: vertical; margin-bottom: 10px; transition: border-color .15s; }
.ex-open:focus { border-color: var(--ink); }

/* навигация по уроку */
.lesson-nav { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 22px; padding-top: 16px; border-top: 1.5px solid var(--border); flex-wrap: wrap; }
.done-btn { padding: 11px 22px; border-radius: var(--r-sm); border: 1px solid var(--border); background: var(--card); color: var(--text); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .15s; }
.done-btn:hover { border-color: var(--ok); color: var(--ok); }
.done-btn.is-done { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); }

/* прогресс курса */
.progress-line { height: 5px; background: var(--paper-2); border: 1px solid var(--hairline); border-radius: 6px; overflow: hidden; margin-top: 16px; }
.progress-fill { display: block; height: 100%; background: var(--accent); border-radius: 6px; transition: width .3s; }
.progress-cap { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--label); margin-top: 7px; }

/* ════════════════ ПЕРЕВОД СЛОВА ПО КЛИКУ ════════════════ */
.tap-w { cursor: pointer; border-bottom: 1px dashed var(--label); transition: color .12s, border-color .12s, background .12s; border-radius: 2px; }
.tap-w:hover { color: var(--accent); border-bottom-color: var(--accent); }
.tap-w.active { background: var(--accent-light); color: var(--accent); border-bottom: 1px solid var(--accent); }
#tap-pop {
  display: none; position: absolute; z-index: 1200; max-width: 260px;
  background: var(--btn-ink); color: var(--btn-ink-text);
  border-radius: var(--r-md); padding: 11px 14px; box-shadow: var(--shadow-pop);
  font-size: 13.5px; line-height: 1.5;
}
#tap-pop::before {
  content: ""; position: absolute; top: -5px; left: 50%; margin-left: -5px;
  border-left: 5px solid transparent; border-right: 5px solid transparent;
  border-bottom: 5px solid var(--btn-ink);
}
#tap-pop .tp-term { font-family: var(--font-display); font-weight: 700; font-size: 15px; display: flex; align-items: center; gap: 6px; }
#tap-pop .tp-term .vocab-say { color: var(--btn-ink-text); opacity: .7; }
#tap-pop .tp-term .vocab-say:hover { opacity: 1; color: var(--btn-ink-text); background: rgba(255,255,255,.14); }
#tap-pop .tp-ru { opacity: .85; margin-top: 3px; }
#tap-pop .tp-wait { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; opacity: .7; }

/* ── режимы курса: учить слова и квиз ── */
.mode-tabs { display: flex; gap: 8px; margin: 14px 0 2px; flex-wrap: wrap; }
.mode-tab {
  background: var(--card); color: var(--text2); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 9px 18px; font-size: 13px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.mode-tab:hover { border-color: var(--ink); color: var(--text); }
.mode-tab.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.flashcard { perspective: 1200px; cursor: pointer; margin: 20px auto 6px; max-width: 540px; height: 260px; }
.fc-inner { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform .45s; }
.flashcard.flipped .fc-inner { transform: rotateY(180deg); }
.fc-face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 22px; text-align: center;
  box-shadow: 0 3px 14px rgba(32,29,23,0.06);
}
.fc-back { transform: rotateY(180deg); background: var(--paper-2); }
.fc-word { font-family: var(--font-serif, Georgia, serif); font-size: 1.7rem; font-weight: 700; color: var(--text); line-height: 1.25; }
.fc-ipa { font-family: var(--font-mono); font-size: 13px; color: var(--text2); }
.fc-hint { font-size: 11.5px; color: var(--label); letter-spacing: .04em; }
.fc-toggle { font-size: 12px; color: var(--text2); display: flex; align-items: center; gap: 6px; cursor: pointer; }
.fc-controls { display: flex; gap: 10px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.fc-btn-learn {
  padding: 11px 22px; border-radius: var(--r-sm); border: 1px solid var(--err); background: var(--err-bg);
  color: var(--err); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.fc-btn-learn:hover { background: var(--err); color: #fff; }
.fc-btn-know {
  padding: 11px 22px; border-radius: var(--r-sm); border: 1px solid var(--ok); background: var(--ok-bg);
  color: var(--ok); font-size: 13.5px; font-weight: 600; cursor: pointer; transition: all .15s;
}
.fc-btn-know:hover, .fc-btn-know.is-done { background: var(--ok); color: #fff; }

.quiz-dir { display: flex; gap: 8px; justify-content: center; margin-top: 10px; flex-wrap: wrap; }
.quiz-word { margin: 10px 0 4px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.quiz-opts { display: grid; gap: 10px; margin-top: 16px; }
.quiz-opt {
  text-align: left; background: var(--card); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 13px 16px; font-size: 14.5px; font-weight: 500; cursor: pointer; transition: all .15s;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--ink); }
.quiz-opt.correct { border-color: var(--ok); background: var(--ok-bg); color: var(--ok); font-weight: 700; }
.quiz-opt.wrong { border-color: var(--err); background: var(--err-bg); color: var(--err); }
.quiz-opt:disabled { cursor: default; opacity: .92; }

/* ── поиск по урокам и прогресс на выборе языка ── */
.lesson-search { margin: 4px 0 12px; }
.lesson-search input {
  width: 100%; box-sizing: border-box; padding: 12px 16px; font-size: 14px; color: var(--text);
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-sm); outline: none; transition: border-color .15s;
}
.lesson-search input:focus { border-color: var(--ink); }
.lang-progress { display: block; margin-top: 7px; }
.lang-progress-bar {
  display: block; height: 4px; background: var(--paper-2); border: 1px solid var(--hairline);
  border-radius: 4px; overflow: hidden; margin-bottom: 4px;
}
.lang-progress-bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.lang-progress small { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .04em; color: var(--label); }

/* ── кликабельные слова в чтении и скрытое аудирование ── */
.read-clickable .rw { cursor: pointer; border-radius: 3px; padding: 0 1px; transition: background .12s, color .12s; }
.read-clickable .rw:hover { background: var(--accent-light); color: var(--accent); }
.listen-box {
  display: flex; flex-direction: column; gap: 10px; align-items: flex-start;
  background: var(--paper-2); border: 1px dashed var(--border); border-radius: var(--r-sm); padding: 16px;
}
.listen-box .ex-note { margin: 0; }

/* ── учебники ── */
.tb-text p { margin: 0 0 12px; line-height: 1.75; font-size: 15px; }
.tb-text b { color: var(--accent); }

/* ── учебники: страницы и иллюстрации ── */
.tb-fig { margin: 16px auto; text-align: center; }
.tb-fig svg { max-width: 460px; width: 100%; height: auto; color: var(--text); display: block; margin: 0 auto; }
.tb-figcap { font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; color: var(--label); margin-top: 6px; }
.tb-pagebar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 4px 0 14px; flex-wrap: wrap; }
.tb-dots { display: flex; gap: 6px; align-items: center; }
.tb-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--paper-2); border: 1px solid var(--border); cursor: pointer; transition: all .15s; }
.tb-dot.task { border-radius: 3px; }
.tb-dot.cur { background: var(--accent); border-color: var(--accent); transform: scale(1.25); }
.tb-pagenum { font-family: var(--font-mono); font-size: 11px; letter-spacing: .05em; color: var(--label); }
/* ── приветствие в кабинете сразу после регистрации ── */
.onb-done {
  background: var(--accent-light); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: 16px 18px 14px; margin: 2px 0 20px;
}
.onb-done-h {
  display: flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-size: 17px; font-weight: 700;
  color: var(--ink); letter-spacing: -.01em; margin-bottom: 9px;
}
.onb-done-tick {
  width: 24px; height: 24px; flex: none; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
}
.onb-done-tick .ic { width: 15px; height: 15px; stroke: currentColor; stroke-width: 2.4; fill: none; }
.onb-done p { font-size: 13.4px; line-height: 1.62; color: var(--text2); margin: 0 0 8px; }
.onb-done p b { color: var(--text); }
.onb-done-x {
  margin-top: 4px; padding: 7px 15px; border-radius: 9px; cursor: pointer;
  background: none; border: 1px solid var(--border); color: var(--text2);
  font-family: inherit; font-size: 12.5px; transition: border-color .15s, color .15s;
}
.onb-done-x:hover { border-color: var(--ink); color: var(--ink); }

.tb-banner {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left; cursor: pointer;
  background: var(--accent-light); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 14px 16px; margin-top: 14px; transition: border-color .15s;
}
.tb-banner:hover { border-color: var(--accent); }
.tb-banner b { display: block; font-size: 14.5px; color: var(--text); }
.tb-banner small { display: block; font-size: 12px; color: var(--text2); margin-top: 3px; line-height: 1.5; }

/* ════════════════════════════════════════════════════════════
   ЯДРО ПРОГРЕССА · ПОВТОРЕНИЕ · ПОИСК · МОБИЛЬНАЯ ВЁРСТКА
   ════════════════════════════════════════════════════════════ */

/* ── значок «ждёт повторения» в меню ── */
.nav-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 17px; height: 17px; padding: 0 5px; margin-left: 6px;
  border-radius: 9px; background: var(--accent); color: #fff;
  font-family: var(--font-mono); font-size: 10.5px; font-weight: 600; line-height: 1;
  vertical-align: 1px;
}
.nav-badge[hidden] { display: none; }

/* ── хлебная строка вместо второго меню ── */
.crumb-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 18px; background: var(--card);
  border-bottom: 1px solid var(--hairline); flex-shrink: 0;
}
.crumb-title {
  font-family: var(--font-display); font-size: 16px; font-weight: 700;
  color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* ── уровень освоения ── */
.mst {
  display: inline-block; margin-left: 8px; padding: 1px 7px;
  border-radius: 20px; font-family: var(--font-ui); font-size: 10.5px;
  font-weight: 600; letter-spacing: .02em; vertical-align: 1px; white-space: nowrap;
}
.mst-1 { background: var(--paper-2); color: var(--text2); }
.mst-2 { background: #EDE7D8; color: #8A6A2C; }
.mst-3 { background: var(--ok-bg); color: var(--ok); }
.mst-4 { background: var(--ok); color: #fff; }

.ex-state { font-family: var(--font-ui); font-size: 11.5px; font-weight: 600; }
.ex-state.ok { color: var(--ok); }
.ex-state.bad { color: var(--err); }
.ex-opt.locked { cursor: default; }
.tb-jump { margin-top: 14px; display: flex; justify-content: flex-end; }

/* ── всплывающее сообщение ── */
.vx-toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 16px);
  max-width: min(440px, calc(100vw - 32px));
  background: var(--ink); color: var(--paper);
  padding: 12px 18px; border-radius: var(--r-md); font-size: 13.5px; font-weight: 500;
  line-height: 1.5; box-shadow: var(--shadow-pop);
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 900;
}
.vx-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ── кольцо дневной цели ── */
.goal-ring { display: flex; align-items: center; gap: 14px; }
.goal-ring svg { flex-shrink: 0; transform: rotate(-90deg); }
.vx-ring-bg { fill: none; stroke: var(--hairline); stroke-width: 6; }
.vx-ring-fill {
  fill: none; stroke: var(--accent); stroke-width: 6; stroke-linecap: round;
  transition: stroke-dashoffset .4s ease;
}
.goal-ring .ring-wrap { position: relative; width: 64px; height: 64px; }
.goal-ring .vx-ring-txt {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--ink);
}
.goal-ring .goal-cap { font-size: 13px; color: var(--text2); line-height: 1.5; }
.goal-ring .goal-cap b { display: block; font-size: 14.5px; color: var(--text); font-weight: 600; }

/* ── выбор цели в настройках ── */
.goal-pick { display: flex; align-items: center; gap: 6px; }
.goal-opt {
  min-width: 34px; padding: 6px 8px; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; cursor: pointer;
  transition: border-color .13s, background .13s;
}
.goal-opt:hover { border-color: var(--ink); }
.goal-opt.selected { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.goal-unit { font-size: 12px; color: var(--text2); }
.settings-hint { font-size: 12px; color: var(--text2); line-height: 1.55; margin-top: 7px; }
.backup-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }

/* ── поиск ── */
.search-card { max-width: 620px; width: 100%; }
.search-input {
  width: 100%; padding: 12px 14px; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--input-bg); color: var(--text);
  font-family: var(--font-ui); font-size: 15px; outline: none;
}
.search-input:focus { border-color: var(--accent); }
.search-results { margin-top: 12px; max-height: min(52vh, 440px); overflow-y: auto; }
.search-hint { font-size: 13px; color: var(--text2); line-height: 1.6; padding: 12px 2px; }
.search-row {
  display: flex; align-items: center; gap: 12px; padding: 10px 10px;
  border-radius: var(--r-sm); text-decoration: none; color: inherit;
  border-bottom: 1px solid var(--hairline);
}
.search-row:last-child { border-bottom: none; }
.search-row:hover { background: var(--paper-2); }
.search-kind {
  flex-shrink: 0; min-width: 74px; font-family: var(--font-mono); font-size: 10px;
  font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--label);
}
.search-txt { min-width: 0; }
.search-txt b { display: block; font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.4; }
.search-txt small { display: block; font-size: 12px; color: var(--text2); margin-top: 2px; }

/* ── карточка «Продолжить» и плитки кабинета ── */
.vx-continue {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  padding: 16px 18px; border-radius: var(--r-md);
  border: 1px solid var(--accent); background: var(--accent-light);
  color: inherit; text-decoration: none; cursor: pointer;
  transition: background .15s, transform .12s;
}
.vx-continue:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.vx-continue .vc-txt { min-width: 0; flex: 1; }
.vx-continue .vc-kicker {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent); font-weight: 600;
}
.vx-continue .vc-title {
  display: block; font-family: var(--font-display); font-size: 17px; font-weight: 700;
  color: var(--ink); margin-top: 3px; line-height: 1.3;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.vx-continue .vc-sub { display: block; font-size: 12.5px; color: var(--text2); margin-top: 2px; }
.vx-continue .vc-go { font-size: 20px; color: var(--accent); flex-shrink: 0; }

.vx-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.vx-tile {
  display: block; padding: 14px; border-radius: var(--r-md);
  border: 1px solid var(--border); background: var(--card);
  text-decoration: none; color: inherit; text-align: left; cursor: pointer;
  transition: border-color .13s, background .13s;
}
.vx-tile:hover { border-color: var(--ink); background: var(--paper-2); }
.vx-tile .vt-n {
  display: block; font-family: var(--font-mono); font-size: 22px; font-weight: 600; color: var(--ink);
}
.vx-tile .vt-c { display: block; font-size: 12px; color: var(--text2); margin-top: 3px; line-height: 1.45; }
.vx-tile.accent { border-color: var(--accent); }
.vx-tile.accent .vt-n { color: var(--accent); }

/* ── экран повторения ── */
.rev-wrap { max-width: 720px; margin: 0 auto; padding: 22px 18px 60px; }
.rev-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px; box-shadow: var(--shadow-card); margin-bottom: 16px;
}
.rev-q { font-family: var(--font-display); font-size: 19px; font-weight: 600; line-height: 1.45; color: var(--ink); margin-bottom: 6px; }
.rev-meta { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--label); margin-bottom: 14px; }
.rev-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.rev-bar .rb-line { flex: 1; height: 5px; background: var(--paper-2); border: 1px solid var(--hairline); border-radius: 6px; overflow: hidden; }
.rev-bar .rb-line i { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.rev-bar .rb-num { font-family: var(--font-mono); font-size: 11.5px; color: var(--text2); }
.rev-empty { text-align: center; padding: 30px 12px; }
.rev-empty h2 { font-family: var(--font-display); font-size: 22px; margin-bottom: 10px; color: var(--ink); }
.rev-empty p { color: var(--text2); line-height: 1.65; font-size: 14.5px; max-width: 460px; margin: 0 auto 8px; }
.rev-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.rev-tabs { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.rev-tab {
  padding: 8px 14px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--card); color: var(--text2); font-family: var(--font-ui);
  font-size: 13px; font-weight: 600; cursor: pointer; transition: all .13s;
}
.rev-tab:hover { border-color: var(--ink); color: var(--text); }
.rev-tab.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* ── экран прогресса ── */
.pg-wrap { max-width: 860px; margin: 0 auto; padding: 22px 18px 70px; }
.pg-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 18px 0; }
.pg-stat {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 16px; text-align: center;
}
.pg-stat .n { font-family: var(--font-mono); font-size: 26px; font-weight: 600; color: var(--ink); }
.pg-stat .c { font-size: 12px; color: var(--text2); margin-top: 4px; line-height: 1.4; }
.pg-week { display: flex; align-items: flex-end; gap: 8px; height: 130px; margin: 8px 0 4px; }
.pg-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.pg-col .bar { width: 100%; max-width: 42px; background: var(--accent-light); border: 1px solid var(--accent); border-radius: 5px 5px 0 0; min-height: 3px; transition: height .3s; }
.pg-col .bar.full { background: var(--accent); }
.pg-col .lbl { font-family: var(--font-mono); font-size: 10px; color: var(--text2); }
.pg-col .val { font-family: var(--font-mono); font-size: 11px; color: var(--ink); font-weight: 600; }
.pg-sub-row { display: flex; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px solid var(--hairline); }
.pg-sub-row:last-child { border-bottom: none; }
.pg-sub-name { flex: 1; font-size: 14px; font-weight: 600; color: var(--text); min-width: 0; }
.pg-sub-line { flex: 1.4; height: 6px; background: var(--paper-2); border: 1px solid var(--hairline); border-radius: 6px; overflow: hidden; }
.pg-sub-line i { display: block; height: 100%; background: var(--ok); }
.pg-sub-pct { width: 46px; text-align: right; font-family: var(--font-mono); font-size: 12px; color: var(--text2); }

/* ── печать отчёта родителям ── */
@media print {
  #app-nav, .no-print, .modal-overlay, .vx-toast, .site-footer, .cookie-bar { display: none !important; }
  body { background: #fff; }
  .pg-wrap { max-width: 100%; padding: 0; }
  .pg-stat, .rev-card { break-inside: avoid; }
}

/* ── вехи ── */
.vx-milestone {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(32,29,23,.55); z-index: 950; padding: 20px;
}
.vx-milestone .ms-card {
  background: var(--card); border-radius: var(--r-lg); padding: 34px 28px;
  max-width: 380px; text-align: center; box-shadow: var(--shadow-pop);
}
.vx-milestone .ms-em { font-size: 46px; line-height: 1; }
.vx-milestone h3 { font-family: var(--font-display); font-size: 24px; margin: 14px 0 8px; color: var(--ink); }
.vx-milestone p { font-size: 14px; color: var(--text2); line-height: 1.6; margin-bottom: 18px; }

/* ════════════ МОБИЛЬНАЯ ВЁРСТКА РАЗДЕЛОВ ПРИЛОЖЕНИЯ ════════════ */
@media (max-width: 720px) {
  .vx-tiles { grid-template-columns: repeat(2, 1fr); }
  .pg-grid { grid-template-columns: repeat(2, 1fr); }
  .rev-wrap, .pg-wrap { padding: 16px 13px 60px; }
  .rev-card { padding: 18px 16px; border-radius: var(--r-md); }
  .rev-q { font-size: 17px; }
  .crumb-bar { padding: 10px 13px; }
  .crumb-title { font-size: 15px; }
  .search-kind { display: none; }
  .search-card { max-width: 100%; }
  .modal-card { padding: 20px 16px; border-radius: var(--r-md); max-height: 88vh; }
  .course-wrap { padding-left: 13px !important; padding-right: 13px !important; }
  .course-card, .lesson-open { padding: 18px 15px !important; }
  .course-hero h1 { font-size: 26px; }
  .lesson-row { padding: 10px 13px; gap: 9px; }
  .lesson-row:hover { padding-left: 15px; }
  .lr-title { font-size: 13.5px; }
  .lr-type { display: none; }
  .lesson-nav { flex-wrap: wrap; gap: 8px; }
  .lesson-nav > * { flex: 1 1 auto; }
  .exam-task-grid { grid-template-columns: repeat(5, 1fr) !important; }
  .subjects-card { padding: 20px 16px !important; }
  .quiz-block { padding: 14px 13px; }
  .ex-q { font-size: 14.5px; }
  .tb-text { font-size: 15px; }
  .goal-ring .ring-wrap { width: 56px; height: 56px; }
  .pg-week { height: 104px; }
}
@media (max-width: 480px) {
  .vx-tiles { grid-template-columns: 1fr 1fr; gap: 8px; }
  /* три плитки в два столбца: третья занимает всю ширину, чтобы не висел «огрызок» */
  .vx-tiles > :last-child:nth-child(odd) { grid-column: 1 / -1; }
  .pg-grid { grid-template-columns: 1fr 1fr; }
  .vx-continue { padding: 14px; gap: 10px; }
  .vx-continue .vc-title { font-size: 15.5px; }
  .exam-task-grid { grid-template-columns: repeat(4, 1fr) !important; }
  .rev-tabs { gap: 5px; }
  .rev-tab { padding: 7px 11px; font-size: 12.5px; }
}

/* доступность: видимый фокус с клавиатуры */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
/* «Перейти к содержимому» — не видна мышкой, выезжает только при Tab.
   Тем, кто ходит по сайту с клавиатуры, не нужно прощёлкивать всё меню. */
.skip-link {
  position: fixed; top: -60px; left: 12px; z-index: 300;
  padding: 10px 16px; border-radius: var(--r-sm);
  background: var(--btn-ink); color: var(--btn-ink-text);
  font-family: var(--font-ui); font-size: 14px; text-decoration: none;
  box-shadow: var(--shadow-pop); transition: top .15s ease;
}
.skip-link:focus { top: 12px; }
/* у контейнера страницы фокус программный — рамку рисовать не надо */
#vx-main:focus, #vx-main:focus-visible { outline: none; }