@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=PT+Sans:wght@400;700&family=PT+Mono&display=swap');

/* ============================================================
   Токены взяты один в один с consortium.stankin.ru
   (_next/static/css/8edcd7f61993c01c.css)
   ============================================================ */
:root,
:root[data-theme="light"] {
  --font-sans: "PT Sans", system-ui, sans-serif;
  --font-display: "Montserrat", "PT Sans", system-ui, sans-serif;
  --font-mono: "PT Mono", ui-monospace, monospace;

  --brand-blue: #3c6ee6;
  --brand-violet: #7e1fb0;
  --brand-magenta: #c24bdd;
  --brand-pink: #fa235a;
  --brand-gradient: linear-gradient(100deg, #3c6ee6, #7e1fb0 38%, #c24bdd 66%, #fa235a);

  --color-bg: 240 20% 99%;
  --color-bg-elevated: 220 20% 97%;
  --color-surface: 0 0% 100%;
  --color-surface-strong: 220 23% 94%;
  --color-text: 224 18% 11%;
  --color-muted: 220 12% 37%;
  --color-primary: 222 77% 57%;
  --color-primary-foreground: 0 0% 100%;
  --color-accent: 289 68% 58%;
  --color-border: 220 23% 91%;
  --color-outline: 222 77% 57%;
  --color-success: 149 80% 36%;
  --color-success-soft: 148 52% 93%;
  --color-error: 345 96% 56%;
  --color-error-soft: 345 92% 95%;

  --shadow-panel: 0 1px 2px rgba(14,17,22,.06), 0 1px 1px rgba(14,17,22,.04);
  --shadow-soft: 0 12px 28px rgba(14,17,22,.12), 0 4px 8px rgba(14,17,22,.06);
  --shadow-hero: 0 28px 60px rgba(30,58,130,.18), 0 10px 22px rgba(14,17,22,.1);

  --radius-xs: .25rem;
  --radius-sm: .5rem;
  --radius-md: .75rem;
  --radius-lg: 1.125rem;
  --radius-xl: 1.75rem;

  --container-xl: 84rem;
  --body-grid-alpha: .06;
}

:root[data-theme="dark"] {
  --color-bg: 234 35% 7%;
  --color-bg-elevated: 234 32% 10%;
  --color-surface: 232 26% 13%;
  --color-surface-strong: 231 25% 17%;
  --color-text: 220 26% 95%;
  --color-muted: 228 14% 72%;
  --color-primary: 254 98% 66%;
  --color-primary-foreground: 233 36% 8%;
  --color-accent: 222 96% 62%;
  --color-border: 231 21% 32%;
  --color-outline: 229 56% 84%;
  --color-success: 149 80% 46%;
  --color-success-soft: 148 39% 10%;
  --color-error: 345 96% 64%;
  --color-error-soft: 343 47% 12%;
  --shadow-panel: 0 1px 2px rgba(0,0,0,.5);
  --shadow-soft: 0 14px 30px rgba(0,0,0,.55);
  --shadow-hero: 0 30px 64px rgba(0,0,0,.6);
  --body-grid-alpha: .08;
}

/* Версия для слабовидящих — три схемы, как на сайте */
:root[data-a11y="on"][data-a11y-scheme="white"] {
  --color-bg: 0 0% 100%; --color-bg-elevated: 0 0% 100%; --color-surface: 0 0% 100%;
  --color-surface-strong: 0 0% 92%; --color-text: 0 0% 0%; --color-muted: 0 0% 18%;
  --color-primary: 0 0% 0%; --color-primary-foreground: 0 0% 100%; --color-accent: 0 0% 0%;
  --color-border: 0 0% 0%; --color-outline: 0 0% 0%;
}
:root[data-a11y="on"][data-a11y-scheme="black"] {
  --color-bg: 0 0% 0%; --color-bg-elevated: 0 0% 0%; --color-surface: 0 0% 0%;
  --color-surface-strong: 0 0% 14%; --color-text: 0 0% 100%; --color-muted: 0 0% 82%;
  --color-primary: 0 0% 100%; --color-primary-foreground: 0 0% 0%; --color-accent: 0 0% 100%;
  --color-border: 0 0% 100%; --color-outline: 0 0% 100%;
}
:root[data-a11y="on"][data-a11y-scheme="blue"] {
  --color-bg: 205 100% 88%; --color-bg-elevated: 205 100% 88%; --color-surface: 205 100% 88%;
  --color-surface-strong: 205 70% 78%; --color-text: 210 100% 18%; --color-muted: 210 90% 26%;
  --color-primary: 210 100% 18%; --color-primary-foreground: 205 100% 88%; --color-accent: 210 100% 18%;
  --color-border: 210 100% 18%; --color-outline: 210 100% 18%;
}
:root[data-a11y="on"] {
  --brand-gradient: none;
  --shadow-panel: none; --shadow-soft: none; --shadow-hero: none;
  --body-grid-alpha: 0;
}
/* Цвет текста обязан меняться вместе с фоном: в схеме «белым по чёрному»
   основной цвет — белый, и зашитый #fff давал белое по белому. */
:root[data-a11y="on"] .badge-grad,
:root[data-a11y="on"] .btn-primary {
  background: hsl(var(--color-primary));
  color: hsl(var(--color-primary-foreground));
}
/* В версии для слабовидящих градиента нет — иначе указатели активного
   состояния (полоска дорожки, вкладки, выбранного события) исчезли бы. */
:root[data-a11y="on"] .track::before,
:root[data-a11y="on"] .tab::before,
:root[data-a11y="on"] .event-pick::before,
:root[data-a11y="on"] .sec-num::after { background: hsl(var(--color-primary)); }
:root[data-a11y="on"] .track::before,
:root[data-a11y="on"] .tab::before,
:root[data-a11y="on"] .event-pick::before { height: 4px; }
:root[data-a11y="on"] img:not(.keep) { filter: grayscale(100%); }

/* ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: calc(16px * var(--fs-scale, 1)); scroll-behavior: smooth; scroll-padding-top: 96px; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: hsl(var(--color-bg));
  color: hsl(var(--color-text));
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(hsl(var(--color-text) / var(--body-grid-alpha)) 1px, transparent 1px),
    linear-gradient(90deg, hsl(var(--color-text) / var(--body-grid-alpha)) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.5), transparent 60%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.5), transparent 60%);
}
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 800; line-height: 1.18; margin: 0; letter-spacing: -.01em; }
a { color: hsl(var(--color-primary)); }
p { margin: 0 0 .75rem; }
:focus-visible { outline: 3px solid hsl(var(--color-outline)); outline-offset: 2px; border-radius: var(--radius-xs); }

.container { max-width: var(--container-xl); margin: 0 auto; padding: 0 1.5rem; position: relative; z-index: 1; }
.stack > * + * { margin-top: 1.5rem; }
.stack > .prose-section + *, .stack > * + .prose-section { margin-top: 3.5rem; }
.mono { font-family: var(--font-mono); }
.muted { color: hsl(var(--color-muted)); }
.small { font-size: .875rem; }
.tiny { font-size: .8125rem; }
.hidden { display: none !important; }

/* ---------- Шапка ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: hsl(var(--color-surface) / .9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid hsl(var(--color-border));
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.125rem 0; }
.brand-logo { height: 3rem; width: auto; display: block; }
/* Файлы названы по цвету логотипа, а не по теме:
   brand-logo-dark.svg  — тёмный, для светлого фона
   brand-logo-light.svg — белый,  для тёмного фона          */
.logo-on-light { display: block; }
.logo-on-dark  { display: none; }
:root[data-theme="dark"] .logo-on-light { display: none; }
:root[data-theme="dark"] .logo-on-dark  { display: block; }
:root[data-a11y="on"] .logo-on-light { display: block; }
:root[data-a11y="on"] .logo-on-dark  { display: none; }
:root[data-a11y="on"][data-a11y-scheme="black"] .logo-on-light { display: none; }
:root[data-a11y="on"][data-a11y-scheme="black"] .logo-on-dark  { display: block; }

/* меню версии для слабовидящих */
.a11y-wrap { position: relative; }
#a11y-menu {
  position: absolute; right: 0; top: calc(100% + .5rem); z-index: 60;
  background: hsl(var(--color-surface)); border: 1px solid hsl(var(--color-border));
  border-radius: var(--radius-md); box-shadow: var(--shadow-soft);
  padding: .5rem; display: grid; gap: .25rem; min-width: 13rem;
}
#a11y-menu button {
  display: flex; align-items: center; gap: .625rem; width: 100%; text-align: left;
  padding: .5rem .625rem; border: 1px solid transparent; border-radius: var(--radius-sm);
  background: transparent; color: hsl(var(--color-text)); cursor: pointer;
  font-family: var(--font-sans); font-size: .875rem;
}
#a11y-menu button:hover { background: hsl(var(--color-primary) / .08); border-color: hsl(var(--color-primary)); }
#a11y-menu i { width: 1rem; height: 1rem; border-radius: 3px; border: 1px solid hsl(var(--color-border)); flex: none; }
.header-actions { display: flex; align-items: center; gap: .625rem; }
.icon-btn {
  width: 2.5rem; height: 2.5rem; border-radius: 999px;
  border: 1px solid hsl(var(--color-border));
  background: hsl(var(--color-surface));
  color: hsl(var(--color-text));
  display: grid; place-items: center; cursor: pointer;
  font-family: var(--font-display); font-size: 1rem; font-weight: 700;
  transition: border-color .18s, transform .18s;
}
.icon-btn:hover { border-color: hsl(var(--color-primary)); transform: translateY(-1px); }
.icon-btn svg { width: 1.125rem; height: 1.125rem; }
.btn-login {
  border-radius: 999px; padding: .625rem 1.75rem;
  border: 1px solid hsl(var(--color-border));
  background: hsl(var(--color-surface)); color: hsl(var(--color-text));
  font-family: var(--font-display); font-weight: 700; font-size: .9375rem; cursor: pointer;
}

/* хлебные крошки */
.crumbs { border-bottom: 1px solid hsl(var(--color-border)); background: hsl(var(--color-bg-elevated) / .6); }
.crumbs .container { padding-top: .875rem; padding-bottom: .875rem; font-size: .875rem; color: hsl(var(--color-muted)); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }

/* ---------- Панели ---------- */
main { padding: 2.5rem 0 5rem; position: relative; z-index: 1; }
.panel {
  background: hsl(var(--color-surface));
  border: 1px solid hsl(var(--color-border));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
  padding: 2rem;
}
.panel-hero { padding: 2.75rem 2.5rem; overflow: hidden; position: relative; }
.panel-hero::after {
  content: ""; position: absolute; right: -60px; bottom: -140px;
  width: 320px; height: 320px; border-radius: 999px;
  border: 1.5px solid hsl(var(--color-primary) / .22);
}
.eyebrow {
  font-family: var(--font-display); font-weight: 700; font-size: .6875rem;
  letter-spacing: .18em; text-transform: uppercase; color: hsl(var(--color-primary));
  margin-bottom: .75rem;
}
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1.5rem; }

/* Шкала набора: вес 800 остаётся только за именем мероприятия,
   заголовки разделов идут 700, заголовки карточек — 600.
   Так на странице одна вершина, а не десяток одинаковых. */
h1 { font-size: clamp(2rem, 3.1vw, 2.875rem); line-height: 1.06; letter-spacing: -.028em; }
h2 { font-size: 1.4375rem; font-weight: 700; letter-spacing: -.018em; }
h3 { font-size: 1.0625rem; font-weight: 700; letter-spacing: -.012em; }
h4 { font-weight: 600; }
.section-title {
  font-size: clamp(1.5rem, 2.2vw, 1.9375rem); font-weight: 700; margin: 4.5rem 0 1.5rem;
  padding-top: 1.5rem; border-top: 1px solid hsl(var(--color-border));
}
.prose p { max-width: 64ch; }

/* ---------- Бейджи и кнопки ---------- */
.badge {
  display: inline-flex; align-items: center; gap: .375rem;
  border-radius: 999px; padding: .3125rem .75rem;
  font-family: var(--font-display); font-size: .6875rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
}
.badge-grad { background: var(--brand-gradient); color: #fff; }
.badge-soft { background: hsl(var(--color-surface-strong)); color: hsl(var(--color-muted)); }
.badge-ok { background: hsl(var(--color-success-soft)); color: hsl(var(--color-success)); }
.badge-err { background: hsl(var(--color-error-soft)); color: hsl(var(--color-error)); }
.chip {
  display: inline-flex; align-items: center; border-radius: 999px;
  padding: .375rem .875rem; font-size: .8125rem;
  border: 1px solid hsl(var(--color-border)); color: hsl(var(--color-muted));
  background: hsl(var(--color-bg-elevated));
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border-radius: 999px; padding: .8125rem 1.75rem; cursor: pointer;
  font-family: var(--font-display); font-weight: 700; font-size: .9375rem;
  text-decoration: none; border: 1px solid transparent; transition: transform .18s, box-shadow .18s, opacity .18s;
}
.btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: var(--shadow-soft); }
.btn-primary { background: var(--brand-gradient); color: #fff; }
.btn-secondary { background: hsl(var(--color-surface)); color: hsl(var(--color-primary)); border-color: hsl(var(--color-primary)); }
.btn-ghost { background: transparent; color: hsl(var(--color-muted)); border-color: hsl(var(--color-border)); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }

/* ---------- Определения (ключ: значение) ---------- */
.deflist { display: grid; gap: .625rem; margin: 0; }
.deflist > div { display: grid; grid-template-columns: 10.5rem 1fr; gap: .75rem; align-items: start; }
.deflist dt { font-weight: 700; color: hsl(var(--color-text)); font-size: .9375rem; }
.deflist dd { margin: 0; color: hsl(var(--color-muted)); font-size: .9375rem; overflow-wrap: anywhere; }

/* ============================================================
   ШАПКА ВКЛАДКИ
   Имя мероприятия слева, паспорт справа, под ними — полоса трёх
   дней. Полоса заменила собой три слабых элемента: подзаголовок
   с перечислением, чипы и три анонимных счётчика.
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 2.5rem 3.5rem;
  background: hsl(var(--color-surface));
  border: 1px solid hsl(var(--color-border));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-panel);
  padding: 3rem 2.75rem 0;
  overflow: hidden;
}
.hero-main { display: flex; flex-direction: column; align-items: flex-start; }
.hero-badges { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }

h1 .h1-main { display: block; }
h1 .h1-sub {
  display: block; margin-top: .625rem;
  font-size: clamp(1.0625rem, 1.5vw, 1.375rem); font-weight: 600;
  line-height: 1.28; letter-spacing: -.01em; color: hsl(var(--color-muted));
}
.hero-lead {
  margin: 1.5rem 0 0; max-width: 54ch;
  font-size: 1.0625rem; line-height: 1.6; color: hsl(var(--color-muted));
}
.hero-main .btn-row { margin-top: 2rem; }

/* паспорт мероприятия */
.hero-passport { align-self: start; }
.passport { display: grid; gap: 0; margin: 0; }
.passport > div {
  display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem;
  padding: .8125rem 0; border-top: 1px solid hsl(var(--color-border));
}
.passport > div:first-child { border-top: none; padding-top: 0; }
.passport dt {
  font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em;
  color: hsl(var(--color-muted)); font-family: var(--font-display); padding-top: .1875rem;
}
.passport dd { margin: 0; font-size: .9375rem; line-height: 1.45; }
.passport-host {
  display: flex; align-items: center; gap: .875rem;
  margin-top: 1.25rem; padding-top: 1.25rem;
  border-top: 1px solid hsl(var(--color-border));
  font-size: .75rem; color: hsl(var(--color-muted)); line-height: 1.45;
}
.passport-host img { height: 2.75rem; width: auto; flex: none; }
.passport-host b { font-family: var(--font-display); font-size: .8125rem; color: hsl(var(--color-text)); font-weight: 600; }

/* ---------- Полоса трёх дней ---------- */
.tracks {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 -2.75rem; border-top: 1px solid hsl(var(--color-border));
}
.track {
  position: relative; display: flex; flex-direction: column; gap: .375rem;
  padding: 1.5rem 1.75rem 1.625rem;
  border-left: 1px solid hsl(var(--color-border));
  text-decoration: none; color: inherit;
  transition: background .18s ease;
}
.track:first-child { border-left: none; }
.track::before {
  content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 2px;
  background: var(--brand-gradient); opacity: 0; transition: opacity .18s ease;
}
.track:hover { background: hsl(var(--color-primary) / .045); }
.track:hover::before, .track.is-active::before { opacity: 1; }
.track-day {
  font-size: .75rem; letter-spacing: .04em; color: hsl(var(--color-primary));
  text-transform: uppercase;
}
.track-title {
  font-family: var(--font-display); font-weight: 700; font-size: 1.0625rem;
  line-height: 1.25; letter-spacing: -.012em;
}
.track-who { font-size: .8125rem; color: hsl(var(--color-muted)); line-height: 1.45; }
.track-deadline {
  margin-top: auto; padding-top: .875rem;
  font-size: .75rem; color: hsl(var(--color-muted));
}
.track-deadline b { color: hsl(var(--color-text)); font-weight: 400; }
.track-deadline b::before { content: ""; }
.track.is-closed { background: hsl(var(--color-surface-strong) / .5); }
.track.is-closed .track-title, .track.is-closed .track-who { color: hsl(var(--color-muted)); }
.track.is-closed .track-day { color: hsl(var(--color-muted)); }
.track.is-closed .track-deadline b { color: hsl(var(--color-error)); }

/* ---------- Текстовые полосы без карточки ---------- */
.prose-section {
  display: grid; grid-template-columns: minmax(0, 13rem) minmax(0, 1fr) minmax(0, 14rem);
  gap: 2.5rem 3rem; align-items: start;
  padding: 2rem 2.75rem 0;
}
.prose-head { position: sticky; top: 6.5rem; }
.prose-head h2 { margin-top: .25rem; }
.prose-lead-in { margin-top: 1.75rem; margin-bottom: .5rem; }
.prose-lead-in b { font-family: var(--font-display); font-size: .9375rem; }
.task-list { margin: 0; padding: 0; list-style: none; display: grid; gap: .625rem; max-width: 64ch; }
.task-list li {
  position: relative; padding-left: 1.5rem; color: hsl(var(--color-muted)); line-height: 1.55;
}
.task-list li::before {
  content: ""; position: absolute; left: .25rem; top: .6875rem;
  width: .375rem; height: .375rem; border-radius: 999px; background: hsl(var(--color-primary));
}
.prose-aside {
  border-left: 2px solid hsl(var(--color-border)); padding-left: 1.25rem;
}
.prose-aside p { color: hsl(var(--color-muted)); margin: 0; }

/* ---------- Переключатель программы: та же полоса трёх дней ---------- */
.tabs {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: -2rem -2rem 2rem; border-bottom: 1px solid hsl(var(--color-border));
}
.tab {
  position: relative; display: flex; flex-direction: column; gap: .25rem;
  text-align: left; padding: 1.25rem 1.5rem;
  border: none; border-left: 1px solid hsl(var(--color-border));
  border-radius: var(--radius-xl) 0 0 0;
  background: hsl(var(--color-bg-elevated)); color: hsl(var(--color-muted));
  cursor: pointer; font-family: var(--font-sans);
  transition: background .18s ease, color .18s ease;
}
.tab:first-child { border-left: none; }
.tab:not(:first-child) { border-radius: 0; }
.tab::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: var(--brand-gradient); opacity: 0; transition: opacity .18s ease;
}
.tab:hover { background: hsl(var(--color-surface)); }
.tab-day { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .04em; text-transform: uppercase; }
.tab-title { font-family: var(--font-display); font-weight: 700; font-size: .9375rem; line-height: 1.3; }
.tab[aria-selected="true"] {
  background: hsl(var(--color-surface)); color: hsl(var(--color-text));
}
.tab[aria-selected="true"]::before { opacity: 1; }
.tab[aria-selected="true"] .tab-day { color: hsl(var(--color-primary)); }

/* расписание — левая рейка со временем, волосяные разделители */
.sched { display: grid; }
.sched-row {
  display: grid; grid-template-columns: 7.5rem 1fr; gap: 1.5rem;
  padding: 1rem 0; border-top: 1px solid hsl(var(--color-border));
}
.sched-time { font-family: var(--font-mono); font-size: .8125rem; color: hsl(var(--color-primary)); padding-top: .1875rem; }
.sched-what b { font-family: var(--font-display); font-weight: 600; font-size: .9375rem; display: block; line-height: 1.35; }
.sched-what span { color: hsl(var(--color-muted)); font-size: .875rem; display: block; margin-top: .1875rem; }
.sched-day {
  font-family: var(--font-display); font-weight: 700; font-size: .75rem;
  letter-spacing: .12em; text-transform: uppercase; color: hsl(var(--color-muted));
  margin: 2rem 0 .25rem;
}
.sched-day:first-child { margin-top: 0; }
.sched-what .talks { margin: .625rem 0 0; padding-left: 1.125rem; color: hsl(var(--color-muted)); font-size: .875rem; }
.sched-what .talks li { margin-top: .375rem; line-height: 1.5; }
.sched-what .talks li b { display: inline; font-size: inherit; font-weight: 600; color: hsl(var(--color-text)); }

/* плашка «пример» */
.demo-note {
  display: grid; grid-template-columns: auto 1fr; gap: .875rem; align-items: baseline;
  border-left: 2px solid hsl(var(--color-accent) / .55);
  background: hsl(var(--color-accent) / .05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: .8125rem 1.125rem; margin-bottom: 1.75rem;
  font-size: .8125rem; color: hsl(var(--color-muted)); line-height: 1.5;
}
.demo-note b {
  font-family: var(--font-mono); font-weight: 400; font-size: .6875rem;
  letter-spacing: .12em; text-transform: uppercase; color: hsl(var(--color-accent));
}

/* заметки-нотисы */
.notice { border-radius: var(--radius-md); padding: 1rem 1.25rem; font-size: .9375rem; border: 1px solid; }
.notice-warn { border-color: hsl(var(--color-error) / .4); background: hsl(var(--color-error-soft)); color: hsl(var(--color-text)); }
.notice-info { border-color: hsl(var(--color-primary) / .35); background: hsl(var(--color-primary) / .07); }
.notice-ok { border-color: hsl(var(--color-success) / .4); background: hsl(var(--color-success-soft)); }
.notice b { font-family: var(--font-display); }

/* ---------- Карта ---------- */
.map-wrap {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid hsl(var(--color-border)); height: 22rem;
  background: url("map-mgtu.png") center/cover no-repeat;
}
.map-wrap iframe { width: 100%; height: 100%; border: 0; display: block; position: relative; }

/* ---------- Гостиницы ---------- */
.hotels { display: grid; gap: .875rem; }
.hotel {
  display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center;
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-md); padding: 1rem 1.25rem;
  background: hsl(var(--color-bg-elevated));
}
.hotel b { font-family: var(--font-display); font-size: .9375rem; }
.hotel .price { font-family: var(--font-mono); font-size: .875rem; color: hsl(var(--color-primary)); white-space: nowrap; }

/* ---------- Контакты ---------- */
.person { display: grid; gap: .25rem; padding: 1rem 0; border-bottom: 1px dashed hsl(var(--color-border)); }
.person:last-child { border-bottom: none; }
.person b { font-family: var(--font-display); font-size: .9375rem; }

/* ============================================================
   ФОРМА РЕГИСТРАЦИИ
   ============================================================ */
/* Номер раздела вынесен в левое поле: он нумерует разделы ТЗ,
   а не украшает заголовок, поэтому стоит вне колонки текста. */
.form-section {
  position: relative; padding-left: 4.5rem;
  border-top: 1px solid hsl(var(--color-border)); padding-top: 2.5rem; margin-top: 2.5rem;
}
.form-section:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
/* Номер привязан к своему заголовку, а не к разделу: у заголовка
   раздела 4 стоит пометка data-tz, а она заводит свой контекст
   позиционирования — от раздела номер уехал бы вниз. */
.form-section > h3 { position: relative; margin-bottom: 1.5rem; font-size: 1.1875rem; }
.sec-num {
  position: absolute; left: -4.5rem; top: .125rem;
  font-family: var(--font-mono); font-size: 1.5rem; line-height: 1;
  color: hsl(var(--color-primary)); font-weight: 400;
}
.sec-num::after {
  content: ""; display: block; margin-top: .625rem;
  width: 1.75rem; height: 2px; background: var(--brand-gradient);
}

:root[data-a11y="on"] .sec-num::after { background: hsl(var(--color-primary)); }

.fields { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.375rem 1.5rem; }
/* align-content не даёт полю растянуть ввод, когда соседняя ячейка
   выше из-за подсказки — иначе строки формы разъезжаются по высоте. */
.field { display: grid; gap: .4375rem; align-content: start; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .8125rem; font-weight: 700; font-family: var(--font-display); letter-spacing: .005em; }
.req { color: hsl(var(--color-error)); }
.field .hint { font-size: .8125rem; color: hsl(var(--color-muted)); line-height: 1.45; }
.field input[type="text"], .field input[type="tel"], .field input[type="email"],
.field input[type="date"], .field input[type="datetime-local"], .field input[type="number"],
.field select, .field textarea {
  width: 100%; padding: .75rem .9375rem;
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-md);
  background: hsl(var(--color-surface)); color: hsl(var(--color-text));
  font-family: var(--font-sans); font-size: .9375rem; line-height: 1.4;
  transition: border-color .15s, box-shadow .15s;
}
.field input::placeholder, .field textarea::placeholder { color: hsl(var(--color-muted) / .6); }
.field input[type="file"]::file-selector-button {
  margin-right: .875rem; padding: .5rem 1rem; cursor: pointer;
  border: 1px solid hsl(var(--color-border)); border-radius: 999px;
  background: hsl(var(--color-bg-elevated)); color: hsl(var(--color-text));
  font-family: var(--font-display); font-weight: 700; font-size: .8125rem;
}
.field input[type="file"]::file-selector-button:hover { border-color: hsl(var(--color-primary)); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: hsl(var(--color-primary));
  box-shadow: 0 0 0 3px hsl(var(--color-primary) / .18);
}
.field input:disabled, .field select:disabled, .field textarea:disabled {
  background: hsl(var(--color-surface-strong)); color: hsl(var(--color-muted)); cursor: not-allowed;
}
.field textarea { min-height: 5.5rem; resize: vertical; }
.field input[type="file"] { font-size: .875rem; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: hsl(var(--color-error)); }
.err-msg { font-size: .8125rem; color: hsl(var(--color-error)); display: none; }
.field.invalid .err-msg { display: block; }

/* выбор мероприятий — третье появление полосы трёх дней */
.event-pick {
  position: relative; overflow: hidden;
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-lg);
  padding: 1.375rem 1.625rem; margin-bottom: .875rem;
  transition: border-color .18s, box-shadow .18s;
  background: hsl(var(--color-surface));
}
.event-pick::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: var(--brand-gradient); opacity: 0; transition: opacity .18s ease;
}
.event-pick:hover { border-color: hsl(var(--color-primary) / .5); }
.event-pick.on { border-color: hsl(var(--color-primary)); box-shadow: 0 0 0 3px hsl(var(--color-primary) / .1); }
.event-pick.on::before { opacity: 1; }
.event-pick.locked { background: hsl(var(--color-surface-strong) / .45); border-style: dashed; }
.event-pick.locked .pick-title, .event-pick.locked .pick-sub { color: hsl(var(--color-muted)); }
.event-pick > label.pick-head { display: flex; gap: .875rem; align-items: flex-start; cursor: pointer; font-family: var(--font-display); }
.event-pick.locked > label.pick-head { cursor: not-allowed; }
.pick-head input[type="checkbox"] { width: 1.25rem; height: 1.25rem; margin-top: .1875rem; flex: none; accent-color: hsl(var(--color-primary)); }
.pick-title { font-weight: 700; font-size: 1.0625rem; display: block; letter-spacing: -.012em; }
.pick-sub { font-weight: 400; font-size: .8125rem; color: hsl(var(--color-muted)); font-family: var(--font-sans); display: block; margin-top: .3125rem; }
.pick-day {
  display: inline-block; margin-right: .625rem; padding-right: .625rem;
  border-right: 1px solid hsl(var(--color-border));
  color: hsl(var(--color-primary)); text-transform: uppercase; letter-spacing: .04em; font-size: .75rem;
}
.event-pick.locked .pick-day { color: hsl(var(--color-muted)); }
.pick-body { margin-top: 1.375rem; padding-top: 1.375rem; border-top: 1px solid hsl(var(--color-border)); }

/* радио / чекбоксы */
.radio-row { display: flex; flex-wrap: wrap; gap: .625rem; }
.radio-pill {
  display: inline-flex; align-items: center; gap: .5rem; cursor: pointer;
  border: 1px solid hsl(var(--color-border)); border-radius: 999px;
  padding: .5rem 1rem; font-size: .875rem; background: hsl(var(--color-surface));
}
.radio-pill:has(input:checked) { border-color: hsl(var(--color-primary)); background: hsl(var(--color-primary) / .08); color: hsl(var(--color-primary)); font-weight: 700; }
.radio-pill input { accent-color: hsl(var(--color-primary)); }
.check-line { display: flex; gap: .75rem; align-items: flex-start; font-size: .9375rem; cursor: pointer; }
.check-line input[type="checkbox"] { width: 1.125rem; height: 1.125rem; margin-top: .1875rem; flex: none; accent-color: hsl(var(--color-primary)); }

.subblock { margin-top: 1.25rem; padding: 1.25rem 1.375rem; border-radius: var(--radius-md); background: hsl(var(--color-bg-elevated) / .7); border: 1px solid hsl(var(--color-border)); }
.subblock > h4 { font-family: var(--font-display); font-weight: 600; font-size: .9375rem; margin: 0 0 1rem; }

/* ---------- Маркировка отклонений от ТЗ ---------- */
[data-tz] { position: relative; }
body:not(.show-tz) [data-tz]::after { display: none; }
body.show-tz [data-tz] {
  outline: 2px dashed var(--tz-color); outline-offset: 6px; border-radius: var(--radius-sm);
}
body.show-tz [data-tz]::after {
  content: attr(data-tz-note);
  position: absolute; top: -.5rem; right: 0; transform: translateY(-100%);
  background: var(--tz-color); color: #fff;
  font-family: var(--font-display); font-size: .6875rem; font-weight: 700;
  padding: .1875rem .5rem; border-radius: var(--radius-xs); white-space: nowrap; z-index: 5;
}
[data-tz="add"] { --tz-color: #b7791f; }
[data-tz="ask"] { --tz-color: #3c6ee6; }

/* ---------- Панель прототипа ---------- */
.proto-panel {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 100;
  width: 20rem; max-width: calc(100vw - 2.5rem);
  background: hsl(var(--color-surface)); color: hsl(var(--color-text));
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hero); font-size: .875rem; overflow: hidden;
}
.proto-head {
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  padding: .75rem 1rem; cursor: pointer; background: hsl(var(--color-bg-elevated));
  border-bottom: 1px solid hsl(var(--color-border));
  font-family: var(--font-display); font-weight: 700; font-size: .8125rem;
}
.proto-body { padding: 1rem; display: grid; gap: .875rem; max-height: 60vh; overflow-y: auto; }
.proto-panel.collapsed .proto-body { display: none; }
.proto-body label { font-size: .75rem; font-weight: 700; font-family: var(--font-display); display: block; margin-bottom: .25rem; }
.proto-body input[type="date"], .proto-body select {
  width: 100%; padding: .4375rem .625rem; font-size: .8125rem;
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-sm);
  background: hsl(var(--color-surface)); color: hsl(var(--color-text)); font-family: var(--font-sans);
}
.proto-btns { display: flex; flex-wrap: wrap; gap: .375rem; }
.proto-btns button {
  flex: 1 1 auto; padding: .4375rem .625rem; font-size: .75rem; cursor: pointer;
  border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-sm);
  background: hsl(var(--color-surface)); color: hsl(var(--color-text)); font-family: var(--font-display); font-weight: 700;
}
.proto-btns button:hover { border-color: hsl(var(--color-primary)); color: hsl(var(--color-primary)); }
.proto-links { display: grid; gap: .25rem; font-size: .8125rem; }
.proto-links a { text-decoration: none; }
.proto-links a:hover { text-decoration: underline; }
.proto-legend { display: grid; gap: .3125rem; font-size: .75rem; color: hsl(var(--color-muted)); }
.proto-legend i { display: inline-block; width: .625rem; height: .625rem; border-radius: 2px; margin-right: .375rem; vertical-align: middle; }
.switch { display: flex; align-items: center; gap: .5rem; cursor: pointer; font-size: .8125rem; }
.switch input { accent-color: hsl(var(--color-primary)); width: 1rem; height: 1rem; }

/* ---------- Админ-таблица ---------- */
.table-wrap { overflow-x: auto; border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-lg); }
table.data { border-collapse: collapse; width: 100%; font-size: .8125rem; min-width: 60rem; }
table.data th, table.data td { padding: .625rem .75rem; text-align: left; border-bottom: 1px solid hsl(var(--color-border)); vertical-align: top; white-space: nowrap; }
table.data th { background: hsl(var(--color-bg-elevated)); font-family: var(--font-display); font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; position: sticky; top: 0; }
table.data tbody tr:hover { background: hsl(var(--color-primary) / .04); }
table.data td.wrap { white-space: normal; min-width: 14rem; }
.stat-row { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat { border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-lg); padding: 1.125rem 1.25rem; background: hsl(var(--color-surface)); }
.stat b { display: block; font-family: var(--font-display); font-size: 1.875rem; line-height: 1.1; }
.stat span { font-size: .8125rem; color: hsl(var(--color-muted)); }

/* ---------- Макет письма ---------- */
.mail-frame { max-width: 40rem; margin: 0 auto; border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-lg); overflow: hidden; background: hsl(var(--color-surface)); }
.mail-head { background: var(--brand-gradient); padding: 1.75rem 2rem; color: #fff; }
:root[data-a11y="on"] .mail-head { background: hsl(var(--color-primary)); color: hsl(var(--color-primary-foreground)); }
.mail-head h2 { color: inherit; font-size: 1.25rem; }
.mail-body { padding: 2rem; font-size: .9375rem; }
.mail-meta { border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-md); padding: 1rem 1.25rem; background: hsl(var(--color-bg-elevated)); margin: 1.25rem 0; }
.mail-foot { padding: 1.25rem 2rem; border-top: 1px solid hsl(var(--color-border)); font-size: .8125rem; color: hsl(var(--color-muted)); }

/* ---------- Подвал ---------- */
.site-footer { border-top: 1px solid hsl(var(--color-border)); background: hsl(var(--color-surface)); position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1.2fr; gap: 3rem; padding: 3rem 0; }
.footer-grid h4 { font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; color: hsl(var(--color-muted)); margin-bottom: 1rem; }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem 1.5rem; }
.footer-nav a, .footer-org a { color: hsl(var(--color-text)); text-decoration: none; font-size: .9375rem; }
.footer-nav a:hover { color: hsl(var(--color-primary)); }
.footer-org b { font-family: var(--font-display); font-size: 1.125rem; display: block; margin-bottom: .875rem; line-height: 1.3; }
.footer-org p { color: hsl(var(--color-muted)); font-size: .9375rem; margin: 0 0 .25rem; }
/* min-width:0 обязателен: без него собственная ширина поля ввода
   растягивает колонку сетки и весь подвал становится шире экрана. */
.footer-grid > * { min-width: 0; }
.sub-row { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0 .625rem; }
.sub-row input { flex: 1 1 9rem; min-width: 0; padding: .625rem .875rem; border: 1px solid hsl(var(--color-border)); border-radius: var(--radius-sm); background: hsl(var(--color-surface)); color: hsl(var(--color-text)); font-family: var(--font-sans); }
.footer-bottom { border-top: 1px solid hsl(var(--color-border)); padding: 1.25rem 0; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .8125rem; color: hsl(var(--color-muted)); }
.footer-bottom a { color: hsl(var(--color-muted)); text-decoration: none; }

/* ---------- Каталог мероприятий ---------- */
.filters { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 1rem; }
.filters .field label { font-size: .8125rem; }
.ev-card { display: flex; flex-direction: column; gap: .875rem; }
.ev-card .ev-badges { display: flex; gap: .5rem; flex-wrap: wrap; }
.ev-card h3 { font-size: 1.0625rem; line-height: 1.35; }
.ev-card .ev-meta { font-size: .875rem; color: hsl(var(--color-muted)); display: grid; gap: .1875rem; }
.ev-card .ev-meta b { color: hsl(var(--color-text)); font-weight: 400; }
.ev-card .btn-row { margin-top: auto; padding-top: .5rem; }
.ev-card.featured { border-color: hsl(var(--color-primary)); box-shadow: var(--shadow-soft); }

/* ---------- Адаптив ---------- */
@media (max-width: 1180px) {
  /* паспорт уходит под имя мероприятия, полоса трёх дней остаётся */
  .hero { grid-template-columns: 1fr; gap: 2rem; }
  .hero-lead { max-width: none; }
  .prose-section { grid-template-columns: 1fr; gap: 1.5rem; padding: 2rem 1.5rem 0; }
  .prose-head { position: static; }
  .prose-aside { border-left: none; border-top: 2px solid hsl(var(--color-border)); padding: 1.25rem 0 0; }
}
@media (max-width: 960px) {
  .grid-2, .grid-3, .fields, .stat-row { grid-template-columns: 1fr; }
  .filters { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .panel { padding: 1.5rem; }
  .panel-hero { padding: 1.75rem 1.5rem; }
  .deflist > div { grid-template-columns: 1fr; gap: .125rem; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .hero { padding: 2rem 1.5rem 0; }
  .tracks { grid-template-columns: 1fr; margin: 0 -1.5rem; }
  .track { border-left: none; border-top: 1px solid hsl(var(--color-border)); padding: 1.25rem 1.5rem; }
  .track:first-child { border-top: none; }
  .track-deadline { margin-top: .5rem; padding-top: .5rem; }
  .tabs { grid-template-columns: 1fr; margin: -1.5rem -1.5rem 1.75rem; }
  .tab { border-left: none; border-top: 1px solid hsl(var(--color-border)); border-radius: 0; }
  .tab:first-child { border-top: none; border-radius: var(--radius-xl) var(--radius-xl) 0 0; }
  .sched-row { grid-template-columns: 6rem 1fr; gap: 1rem; }
}
@media (max-width: 700px) {
  /* Логотип и кнопки шапки вместе шире телефона — разносим на две строки.
     Иначе документ становится шире экрана и вся страница едет вбок. */
  .header-inner { flex-wrap: wrap; row-gap: .75rem; padding: .875rem 0; }
  .header-inner > a:first-child { flex: 1 1 100%; }
  .brand-logo { height: auto; width: min(100%, 17rem); }
  .header-actions { flex: 1 1 100%; justify-content: flex-end; position: relative; }
  /* Меню «для слабовидящих» на телефоне привязываем к строке действий, а не к самой
     кнопке: иначе на узких экранах выпадашка уезжала за левый край и пункты обрезались. */
  .a11y-wrap { position: static; }
  #a11y-menu { right: 0; left: auto; min-width: 0; width: min(18rem, calc(100vw - 2rem)); }
  /* принудительный перенос в названии рассчитан на широкий подвал */
  .footer-org b { font-size: 1rem; }
  .footer-org b br { display: none; }
}
@media (max-width: 640px) {
  /* номер раздела встаёт в строку с заголовком: поля слева больше нет */
  .form-section { padding-left: 0; }
  .form-section > h3 { padding-left: 2.25rem; }
  .sec-num { left: 0; font-size: 1.25rem; }
  .sec-num::after { display: none; }
  .passport > div { grid-template-columns: 1fr; gap: .125rem; }
  .passport dt { padding-top: 0; }
  .sched-row { grid-template-columns: 1fr; gap: .125rem; }
  .brand-logo { height: 2.25rem; }
  .btn-login { padding: .5rem 1rem; font-size: .8125rem; }
  .header-actions { gap: .375rem; }
  .icon-btn { width: 2.125rem; height: 2.125rem; }
  .sched-row { grid-template-columns: 1fr; gap: .25rem; }
  .filters { grid-template-columns: 1fr; }
  .hotel { grid-template-columns: 1fr; }
  .proto-panel { right: .625rem; bottom: .625rem; left: .625rem; width: auto; }
  .btn { width: 100%; }
  .tab { flex: 1 1 100%; border-radius: var(--radius-md); border-bottom: 1px solid hsl(var(--color-border)); }
  .tabs { border-bottom: none; }
}
@media print {
  .site-header, .site-footer, .crumbs, .proto-panel, .btn-row { display: none !important; }
}

/* ============================================================
   Движение: одна выдержанная последовательность при загрузке
   полосы трёх дней. Всё остальное — отклик на действие.
   ============================================================ */
@keyframes track-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.tracks .track { animation: track-in .5s cubic-bezier(.2,.7,.3,1) both; }
.tracks .track:nth-child(1) { animation-delay: .06s; }
.tracks .track:nth-child(2) { animation-delay: .13s; }
.tracks .track:nth-child(3) { animation-delay: .2s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tracks .track { animation: none; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}

/* ---------- Баннер мероприятия ----------
   Холст фиксированный, 1920 × 1080: баннер уходит в печать и в презентации, поэтому его размеры
   не зависят от ширины окна. Страница только масштабирует его через --k. Цвета заданы явно, а не
   токенами темы: в тёмной теме баннер обязан остаться светлым — он экспортируется как картинка. */
.banner-stage { --k: 1; position: relative; width: 100%; overflow: hidden; }
.banner {
  position: relative; box-sizing: border-box;
  width: 1920px; height: 1080px; padding: 76px 96px 84px;
  transform: scale(var(--k)); transform-origin: top left;
  display: flex; flex-direction: column; justify-content: space-between;
  background: #fff; color: #14171f; font-family: var(--font-sans);
  border: 1px solid #e3e7ef; border-radius: 2px;
}
.banner::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 14px;
  background: var(--brand-gradient);
}
.banner-logos { display: flex; align-items: center; justify-content: space-between; gap: 56px; }
.banner-logos img { display: block; width: auto; }
.banner-logos img:nth-child(1) { height: 152px; }   /* Национальные проекты */
.banner-logos img:nth-child(2) { height: 108px; }   /* Минобрнауки России */
.banner-logos img:nth-child(3) { height: 96px; }    /* Консорциум */
.banner-logos img:nth-child(4) { height: 184px; }   /* МГТУ им. Г. И. Носова */

.banner-title { text-align: center; }
.banner-kicker {
  font-family: var(--font-mono); font-size: 30px; letter-spacing: .2em;
  text-transform: uppercase; color: #3c6ee6;
}
.banner-title h2 {
  margin: 26px auto 0; max-width: 1720px; font-family: var(--font-display); font-weight: 800;
  font-size: 74px; line-height: 1.16; letter-spacing: -.015em; color: #14171f;
}
.banner-name { font-size: 40px; font-weight: 700; letter-spacing: -.005em; }
.banner-place { margin-top: 24px; font-size: 28px; color: #4a5568; }

.banner-events { display: flex; align-items: center; gap: 60px; }
.banner-cube { height: 320px; width: auto; display: block; flex: none; }
.banner-events ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 26px; }
.banner-events li {
  font-size: 33px; line-height: 1.34; padding-left: 30px; max-width: 1400px;
  border-left: 6px solid #3c6ee6;
}
.banner-events li b { font-weight: 700; }

/* «?clean» — страница отдаёт один холст баннера: без шапки, крошек, пояснений и подвала */
body.banner-only { background: #fff; }
body.banner-only .site-header,
body.banner-only .crumbs,
body.banner-only .panel,
body.banner-only .site-footer,
body.banner-only .proto-panel { display: none !important; }
body.banner-only main { padding: 0; }
body.banner-only main > .container { max-width: none; padding: 0; }
body.banner-only .stack { gap: 0; }
body.banner-only .banner-stage {
  position: fixed; top: 0; left: 0; margin: 0; width: 1920px; height: 1080px; overflow: visible;
}