/* ============================================================
   Дизайн-токены СИБУРа (брендбук 2.0, июль 2025)
   ============================================================ */
:root {
  --sibur-dna: #008C95;
  --sibur-dark: #00313C;
  --sibur-mint: #77E2C3;
  --sibur-white: #FFFFFF;
  --sibur-orange: #E04E39;      /* акцент, не более ~5% площади */
  --sibur-beige: #FFE6D7;       /* только в составе градиента 03 и мягких плашек */
  --sibur-gray-85: #262626;
  --sibur-gray-50: #5A5A5A;
  --sibur-gray-40: #999999;
  --sibur-gray-28: #CCCCCC;
  --sibur-gradient-01: linear-gradient(45deg, #008C95 0%, #00313C 100%);
  --sibur-gradient-02: linear-gradient(45deg, #008C95 0%, #77E2C3 100%);
  --sibur-gradient-03: linear-gradient(45deg, #E04E39 0%, #FFE6D7 100%);

  --font: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --text: var(--sibur-dark);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 16px rgba(0, 49, 60, 0.07);
  --maxw: 1120px;
  --pad: clamp(16px, 4vw, 32px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(76px + env(safe-area-inset-top)); }
body {
  font-family: var(--font);
  color: var(--text);
  background: #F2F6F6;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--sibur-dna); }
svg.i { width: 18px; height: 18px; flex-shrink: 0; stroke: currentColor; fill: none;
        stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ============================================================
   Шапка
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.94); backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(0, 49, 60, 0.10);
  /* установленное на телефон приложение: не заезжать под системную шторку */
  padding-top: env(safe-area-inset-top);
}
.site-header__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad);
  display: flex; align-items: center; gap: 16px; height: 60px;
}
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand img { height: 24px; width: auto; display: block; }
.site-nav { display: flex; gap: 2px; overflow-x: auto; flex: 1;
  -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  color: var(--sibur-dark); text-decoration: none; font-size: 14px;
  padding: 8px 10px; border-radius: var(--radius-sm); white-space: nowrap;
}
.site-nav a:hover { background: rgba(0, 140, 149, 0.08); }
.header-cta {
  flex-shrink: 0; display: inline-flex; align-items: center; gap: 7px;
  background: var(--sibur-dna); color: var(--sibur-white);
  border: none; border-radius: 999px; padding: 9px 16px;
  font-family: var(--font); font-size: 14px; cursor: pointer; text-decoration: none;
  transition: background 0.15s;
}
.header-cta:hover { background: #007780; }
.header-cta svg.i { width: 15px; height: 15px; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  color: var(--sibur-dark); padding: 8px; margin-left: auto;
}
.nav-toggle svg.i { width: 22px; height: 22px; }
@media (max-width: 700px) {
  .site-header__inner { height: 54px; gap: 10px; }
  .brand img { height: 18px; }
  .nav-toggle { display: inline-flex; }
  /* меню на телефоне — выпадающая панель под шапкой (бургер) */
  .site-nav {
    display: none; position: absolute; left: 0; right: 0;
    top: calc(54px + env(safe-area-inset-top));
    background: var(--sibur-white); box-shadow: 0 12px 24px rgba(0,49,60,0.15);
    flex-direction: column; gap: 0; padding: 8px 12px 14px;
    border-radius: 0 0 var(--radius) var(--radius); overflow: visible;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { font-size: 15px; padding: 12px 10px; border-bottom: 1px solid rgba(0,49,60,0.06); }
  .site-nav a:last-child { border-bottom: none; }
  .header-cta { padding: 8px 12px; font-size: 13px; }
  .header-cta span { display: none; }          /* на телефоне — только иконка */
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative; color: var(--sibur-white);
  background: var(--sibur-gradient-01);
  background-size: cover; background-position: center;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(45deg, rgba(0,49,60,0.88) 0%, rgba(0,49,60,0.30) 100%);
}
.hero__inner {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  padding: clamp(48px, 8vw, 104px) var(--pad);
  min-height: 520px;
  display: flex; flex-wrap: wrap; gap: 36px; align-items: flex-end; justify-content: space-between;
}
.hero__copy { max-width: 760px; }
.hero__eyebrow {
  display: inline-flex; margin-bottom: 18px; padding: 7px 10px;
  border-radius: 7px; background: rgba(255,255,255,0.14);
  color: #E9FFFA; font-size: 13px; font-weight: bold;
}
.hero__eyebrow[hidden] { display: none; }
.hero h1 {
  font-size: clamp(34px, 6vw, 72px); line-height: 0.98;
  text-transform: uppercase; margin-bottom: 12px; max-width: 680px;
  letter-spacing: 0.3px;
}
.hero__tagline { font-size: clamp(16px, 2.5vw, 22px); opacity: 0.88; margin-bottom: 26px; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 10px; font-size: 14px; margin-bottom: 30px; }
.hero__meta span {
  display: inline-flex; align-items: center; gap: 8px; min-height: 40px;
  padding: 9px 12px; border: 1px solid rgba(255,255,255,0.24);
  border-radius: 7px; background: rgba(255,255,255,0.13); font-weight: bold;
}
.hero__meta svg.i { width: 16px; height: 16px; color: var(--sibur-mint); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: none; cursor: pointer; text-decoration: none;
  font-family: var(--font); font-size: 15px; border-radius: var(--radius-sm);
  padding: 13px 24px; transition: background 0.15s, transform 0.1s;
}
.btn:active { transform: translateY(1px); }
.btn svg.i { width: 16px; height: 16px; }
.btn--primary { background: var(--sibur-dna); color: var(--sibur-white); }
.btn--primary:hover { background: #007780; }
.btn--ghost { background: rgba(255,255,255,0.12); color: var(--sibur-white); border: 1px solid rgba(255,255,255,0.45); }
.btn--ghost:hover { background: rgba(255,255,255,0.22); }
.btn--light { background: var(--sibur-white); color: var(--sibur-dna); }
.btn--light:hover { background: #E9F4F4; }

.countdown {
  background: rgba(0, 140, 149, 0.92); border-radius: var(--radius);
  padding: 22px 26px; text-align: center; min-width: 272px;
  box-shadow: 0 8px 32px rgba(0, 49, 60, 0.30);
}
.countdown__label { font-size: 13px; opacity: 0.9; margin-bottom: 12px; }
.countdown__grid { display: flex; gap: 20px; justify-content: center; }
.countdown__cell b { display: block; font-size: 32px; line-height: 1; }
.countdown__cell i { font-style: normal; font-size: 11px; opacity: 0.85; }
@media (max-width: 700px) {
  .hero__inner { min-height: 0; padding-bottom: 40px; }
  .countdown { width: 100%; min-width: 0; }
}

/* ============================================================
   Сетка блоков: на десктопе основная колонка + боковая
   ============================================================ */
.layout {
  max-width: var(--maxw); margin: 0 auto;
  padding: 24px var(--pad) 104px;
  display: grid; gap: 20px;
}
.col-main, .col-side { display: grid; gap: 20px; align-content: start; }
@media (min-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr) 360px; align-items: start; }
  .layout.layout--single { grid-template-columns: minmax(0, 1fr); }
}

.block {
  background: var(--sibur-white); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: clamp(20px, 3.5vw, 30px);
}
.block--mint  { background: #E7F8F1; }
.block--beige { background: var(--sibur-beige); }
.block--dna   { background: var(--sibur-gradient-02); color: var(--sibur-dark); }
.block--dark  { background: var(--sibur-gradient-01); color: var(--sibur-white); }
.block--dark a:not(.btn) { color: var(--sibur-mint); }
.block h2 {
  font-size: clamp(17px, 2.2vw, 21px); text-transform: uppercase;
  letter-spacing: 0.4px; margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.block__kicker {
  margin-bottom: 6px; color: var(--sibur-dna); font-size: 11px;
  font-weight: bold; letter-spacing: 0.6px; text-transform: uppercase;
}
.block__kicker + h2 { margin-top: 0; }
.block__lead { color: rgba(0,49,60,0.78); font-size: 16px; }
.block--dark .block__kicker { color: var(--sibur-mint); }
.block--dark .block__lead { color: rgba(255,255,255,0.88); }
.block h2 .ic {
  width: 38px; height: 38px; border-radius: 11px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(0, 140, 149, 0.10); color: var(--sibur-dna);
}
.block--dark h2 .ic, .block--dna h2 .ic { background: rgba(255,255,255,0.16); color: var(--sibur-mint); }
.block--dark h2 .ic svg.i { color: var(--sibur-mint); }
.block p { margin-bottom: 10px; }
.block p:last-child { margin-bottom: 0; }

/* О мероприятии: фичи */
.features { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.feature {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0, 140, 149, 0.07); border-radius: 999px;
  padding: 9px 16px; font-size: 14px;
}
.feature::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--sibur-mint); }
.block--dark .feature, .block--dna .feature { background: rgba(255,255,255,0.15); }

/* Программа */
.program-day + .program-day { margin-top: 24px; }
.program-day h3 { margin-bottom: 10px; color: var(--sibur-dark); font-size: 18px; }
.program { width: 100%; border-collapse: collapse; font-size: 15px; }
.program td { padding: 13px 10px; border-bottom: 1px solid rgba(0,49,60,0.08); vertical-align: top; }
.program tr:last-child td { border-bottom: none; }
.program .t-time { white-space: nowrap; color: var(--sibur-dna); font-weight: bold; width: 118px; }
.program .t-loc { color: var(--sibur-gray-50); font-size: 13px; margin-top: 2px; }
.program .t-speaker { color: var(--sibur-gray-50); font-size: 14px; text-align: right; }
.program tr.is-break td { background: rgba(119, 226, 195, 0.16); }
.program tr.is-break td:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.program tr.is-break td:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
@media (max-width: 620px) {
  .program, .program tbody, .program tr, .program td { display: block; width: 100%; }
  .program td { border: none; padding: 2px 0; }
  .program tr { padding: 12px 2px; border-bottom: 1px solid rgba(0,49,60,0.08); }
  .program tr.is-break { background: rgba(119, 226, 195, 0.16); border-radius: var(--radius-sm); padding: 12px; }
  .program .t-speaker { text-align: left; }
}
.program-download { margin-top: 18px; }

/* Универсальные карточки: дни, спикеры, локации и тематические подборки */
.content-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px; margin-top: 18px;
}
.content-card {
  overflow: hidden; border: 1px solid rgba(0,49,60,0.10);
  border-radius: var(--radius-sm); background: #FAFCFC;
}
.content-card__image { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.content-card__body { padding: 16px; }
.content-card__title {
  display: flex; align-items: center; gap: 8px; color: var(--sibur-dna);
}
.content-card__title svg.i { width: 17px; height: 17px; }
.content-card__meta {
  margin-top: 5px; color: var(--sibur-gray-50); font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.35px;
}
.content-card p { margin-top: 9px; color: rgba(0,49,60,0.78); font-size: 14px; }
.content-card__link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 10px;
  font-size: 14px; font-weight: bold;
}
.content-card--mint { background: #E7F8F1; }
.content-card--beige { background: var(--sibur-beige); }
.content-card--dna { background: var(--sibur-gradient-02); }
.content-card--dark { background: var(--sibur-gradient-01); color: var(--sibur-white); }
.content-card--dark .content-card__title,
.content-card--dark .content-card__meta,
.content-card--dark p,
.content-card--dark a { color: var(--sibur-white); }

/* Оргинформация: карточки */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.card {
  border: 1px solid rgba(0, 49, 60, 0.10); border-radius: var(--radius-sm);
  padding: 16px; transition: border-color 0.15s;
}
.card:hover { border-color: rgba(0, 140, 149, 0.45); }
.card__title { font-weight: bold; color: var(--sibur-dna); margin-bottom: 6px;
  display: flex; gap: 9px; align-items: center; }
.card__title svg.i { width: 17px; height: 17px; }
.card__text { font-size: 14px; white-space: pre-line; }
.card a.card__link { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 14px; }

/* Лента организатора */
.feed { display: grid; gap: 10px; }
.feed__pinned { background: var(--sibur-beige); border-radius: var(--radius-sm); padding: 14px 16px; }
.feed__pinned .tag {
  display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
  color: var(--sibur-orange); font-weight: bold; margin-bottom: 6px;
}
.feed__pinned b { display: block; margin-bottom: 4px; }
.feed__item { display: flex; gap: 12px; align-items: baseline; padding: 9px 4px;
  border-bottom: 1px solid rgba(0,49,60,0.06); }
.feed__item:last-child { border-bottom: none; }
.feed__time { color: var(--sibur-dna); font-weight: bold; font-size: 13px; white-space: nowrap; }
.feed__empty { color: var(--sibur-gray-40); font-size: 14px; }

/* Материалы */
.materials { display: grid; gap: 10px; }
.material {
  display: flex; gap: 12px; align-items: center;
  border: 1px solid rgba(0, 49, 60, 0.10); border-radius: var(--radius-sm);
  padding: 13px 16px; text-decoration: none; color: var(--text);
  transition: border-color 0.15s;
}
.material:hover { border-color: rgba(0, 140, 149, 0.45); }
.material .ic {
  width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(0, 140, 149, 0.10); color: var(--sibur-dna);
}
.material b { display: block; font-size: 14px; line-height: 1.35; }
.material span { font-size: 13px; color: var(--sibur-gray-50); }

/* Контакты */
.people { display: grid; gap: 12px; }
.person { border: 1px solid rgba(0, 49, 60, 0.10); border-radius: var(--radius-sm); padding: 16px; font-size: 15px; }
.person b { display: block; }
.person .role { color: var(--sibur-gray-50); font-size: 13px; margin-bottom: 10px; display: block; }
.person a { display: flex; align-items: center; gap: 9px; text-decoration: none; margin-top: 7px; font-size: 14px; }
.person a svg.i { width: 15px; height: 15px; }

/* Подписка / обратная связь — CTA-блоки */
.cta-block p { opacity: 0.92; }
.cta-block .btn { margin-top: 16px; }
.cta-block .btn + .btn { margin-left: 10px; }

/* Кнопка подписки на push-уведомления: те же .btn / .btn--light / .btn--ghost,
   но это <button>, а не ссылка — выравниваем строку и гасим недоступное состояние */
.cta-block button.btn { line-height: 1.55; }
.cta-block button.btn[disabled] { cursor: default; opacity: 0.7; }
.cta-block .push-msg { margin-top: 12px; font-size: 13px; opacity: 0.85; }

/* Произвольный блок */
.custom-html { font-size: 15px; }

/* ============================================================
   Плавающая плашка последнего уведомления
   ============================================================ */
.notify-bar {
  position: fixed; left: 12px; right: 12px; z-index: 60;
  bottom: calc(12px + env(safe-area-inset-bottom));
  background: var(--sibur-dark); color: var(--sibur-white);
  border-radius: var(--radius-sm); box-shadow: 0 6px 24px rgba(0,49,60,0.35);
  padding: 12px 16px; display: none; cursor: pointer;
  max-width: 560px; margin: 0 auto;
}
.notify-bar.is-visible { display: flex; gap: 12px; align-items: baseline; }
.notify-bar .feed__time { color: var(--sibur-mint); }
.notify-bar .txt { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }

/* Подвал */
.site-footer { background: var(--sibur-dark); color: rgba(255,255,255,0.75); font-size: 13px; }
.site-footer__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 22px var(--pad);
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.site-footer img { height: 18px; width: auto; display: block; }