/* Reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark light;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: 'DM Sans', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  transition: color 0.35s ease, background-color 0.35s ease;
}

/* Тёмная тема — по умолчанию */
:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.2, 0.64, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.32s;
  --duration-slow: 0.55s;

  --bg-deep: #0c0e14;
  --bg-mid: #12161f;
  --bg-elevated: #1a2030;

  --text: #f2ebe0;
  --text-soft: rgba(242, 235, 224, 0.78);
  --muted: rgba(242, 235, 224, 0.55);

  --accent: #d4b06a;
  --accent-strong: #e8c87e;
  --accent-glow: rgba(212, 176, 106, 0.35);
  --accent-border: rgba(212, 176, 106, 0.35);
  --accent-surface: rgba(212, 176, 106, 0.15);
  --accent-surface-hover: rgba(212, 176, 106, 0.2);

  --glass-top: rgba(255, 255, 255, 0.09);
  --glass-mid: rgba(255, 255, 255, 0.03);
  --glass-bottom: rgba(255, 255, 255, 0.02);
  --glass-stroke: rgba(255, 255, 255, 0.12);
  --blur: 20px;
  --radius: 20px;
  --radius-sm: 14px;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --shadow: 0 16px 48px rgba(4, 6, 12, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  --card-shadow-hover: 0 20px 50px rgba(4, 6, 12, 0.45);

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.14);
  --overlay-hover: rgba(255, 255, 255, 0.06);
  --overlay-hover-strong: rgba(255, 255, 255, 0.1);

  --header-bg: rgba(12, 14, 20, 0.72);
  --header-border: rgba(255, 255, 255, 0.06);
  --footer-bg: rgba(12, 14, 20, 0.65);
  --footer-border: rgba(255, 255, 255, 0.06);
  --nav-mobile-bg: rgba(18, 22, 31, 0.95);
  --nav-mobile-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);

  --btn-primary-text: #1a1510;
  --btn-ghost-bg: rgba(255, 255, 255, 0.06);
  --btn-ghost-border: rgba(255, 255, 255, 0.14);
  --btn-ghost-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);

  --gradient-stop-1: #f0e6d0;
  --gradient-stop-2: #c9a55c;
  --hero-glow: rgba(212, 176, 106, 0.08);
  --logo-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);

  --bg-base-radial: #1a1520;
  --bg-base-stop-1: #0a0c12;
  --bg-base-stop-2: #0f1219;
  --bg-base-stop-3: #121820;
  --mesh-1: rgba(180, 140, 70, 0.14);
  --mesh-2: rgba(90, 120, 160, 0.1);
  --mesh-3: rgba(120, 80, 50, 0.08);
  --orb-1: rgba(212, 176, 106, 0.22);
  --orb-2: rgba(100, 130, 170, 0.12);
  --orb-3: rgba(180, 120, 80, 0.1);
  --vignette: rgba(4, 6, 10, 0.65);
  --noise-opacity: 0.45;
  --noise-blend: overlay;

  --avatar-bg-start: rgba(212, 176, 106, 0.12);
  --avatar-bg-end: rgba(255, 255, 255, 0.04);
  --avatar-photo-overlay: rgba(0, 0, 0, 0.2);
  --iframe-ring: rgba(255, 255, 255, 0.08);

  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.14);
  --input-focus-ring: rgba(212, 176, 106, 0.12);
  --input-focus-border: rgba(212, 176, 106, 0.55);

  --font-display: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
}

/* Светлая тема — из настроек ОС (Светлая / Light) */
@media (prefers-color-scheme: light) {
  :root {
    --bg-deep: #e8e2d6;
    --bg-mid: #ddd5c8;
    --bg-elevated: #ffffff;

    --text: #1a1814;
    --text-soft: rgba(26, 24, 20, 0.82);
    --muted: rgba(26, 24, 20, 0.58);

    --accent: #8a6d32;
    --accent-strong: #6f5624;
    --accent-glow: rgba(138, 109, 50, 0.22);
    --accent-border: rgba(138, 109, 50, 0.45);
    --accent-surface: rgba(138, 109, 50, 0.1);
    --accent-surface-hover: rgba(138, 109, 50, 0.16);

    --glass-top: #ffffff;
    --glass-mid: #fcfaf6;
    --glass-bottom: #f5f1e9;
    --glass-stroke: rgba(26, 24, 20, 0.14);
    --surface: #ffffff;
    --surface-hover: #faf7f2;
    --shadow:
      0 1px 2px rgba(26, 24, 20, 0.06),
      0 6px 20px rgba(120, 100, 70, 0.1),
      0 0 0 1px rgba(26, 24, 20, 0.07);
    --card-shadow-hover:
      0 2px 4px rgba(26, 24, 20, 0.06),
      0 14px 36px rgba(120, 100, 70, 0.16);

    --border-subtle: rgba(26, 24, 20, 0.1);
    --border-medium: rgba(26, 24, 20, 0.16);
    --overlay-hover: rgba(26, 24, 20, 0.04);
    --overlay-hover-strong: rgba(26, 24, 20, 0.07);

    --header-bg: rgba(255, 255, 255, 0.92);
    --header-border: rgba(26, 24, 20, 0.1);
    --footer-bg: #f0ebe2;
    --footer-border: rgba(26, 24, 20, 0.1);
    --nav-mobile-bg: #ffffff;
    --nav-mobile-shadow:
      0 4px 12px rgba(26, 24, 20, 0.08),
      0 0 0 1px rgba(26, 24, 20, 0.08);

    --btn-primary-text: #fffef9;
    --btn-ghost-bg: #ffffff;
    --btn-ghost-border: rgba(26, 24, 20, 0.14);
    --btn-ghost-shadow: 0 4px 14px rgba(120, 100, 70, 0.12);

    --gradient-stop-1: #4a3c1e;
    --gradient-stop-2: #8a6d32;
    --hero-glow: rgba(138, 109, 50, 0.07);
    --logo-shadow: none;

    --bg-base-radial: #d9cfc0;
    --bg-base-stop-1: #ebe5da;
    --bg-base-stop-2: #e3dcd0;
    --bg-base-stop-3: #d8d0c2;
    --mesh-1: rgba(180, 150, 90, 0.12);
    --mesh-2: rgba(120, 150, 180, 0.08);
    --mesh-3: rgba(160, 130, 100, 0.07);
    --orb-1: rgba(200, 170, 110, 0.16);
    --orb-2: rgba(130, 160, 190, 0.1);
    --orb-3: rgba(180, 150, 120, 0.09);
    --vignette: rgba(220, 212, 200, 0.35);
    --noise-opacity: 0.18;
    --noise-blend: multiply;

    --avatar-bg-start: rgba(180, 150, 90, 0.14);
    --avatar-bg-end: #f5f1e9;
    --avatar-photo-overlay: rgba(255, 255, 255, 0.15);
    --iframe-ring: rgba(26, 24, 20, 0.1);

    --input-bg: #ffffff;
    --input-border: rgba(26, 24, 20, 0.16);
    --input-focus-ring: rgba(138, 109, 50, 0.18);
    --input-focus-border: rgba(138, 109, 50, 0.6);
  }

  .glass {
    -webkit-backdrop-filter: blur(12px) saturate(110%);
    backdrop-filter: blur(12px) saturate(110%);
  }

  .site-header {
    box-shadow: 0 1px 0 var(--header-border), 0 4px 16px rgba(26, 24, 20, 0.06);
  }

  .site-footer {
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
  }

  .timeline-item {
    box-shadow: 0 1px 3px rgba(26, 24, 20, 0.05);
  }

  .timeline-item:hover {
    box-shadow: 0 4px 14px rgba(120, 100, 70, 0.12);
  }

  .person.glass {
    box-shadow:
      0 1px 2px rgba(26, 24, 20, 0.06),
      0 8px 24px rgba(120, 100, 70, 0.1),
      0 0 0 1px rgba(26, 24, 20, 0.07);
  }

  .map-card {
    background: #ffffff;
  }

  .brand-logo {
    filter: none;
  }
}

/* —— Background layers —— */
.background {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.bg-base {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 100%, var(--bg-base-radial) 0%, transparent 55%),
    linear-gradient(168deg, var(--bg-base-stop-1) 0%, var(--bg-base-stop-2) 42%, var(--bg-base-stop-3) 100%);
  transition: background 0.4s ease;
}

.bg-mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse 55% 45% at 12% 18%, var(--mesh-1) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 88% 12%, var(--mesh-2) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 70% 85%, var(--mesh-3) 0%, transparent 55%);
  animation: meshDrift 28s ease-in-out infinite alternate;
  transition: background 0.4s ease;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  will-change: transform;
}

.bg-orb--1 {
  width: min(520px, 70vw);
  height: min(520px, 70vw);
  top: -8%;
  left: -6%;
  background: radial-gradient(circle, var(--orb-1) 0%, transparent 68%);
  animation: orbFloat1 22s ease-in-out infinite;
  transition: background 0.4s ease;
}

.bg-orb--2 {
  width: min(440px, 60vw);
  height: min(440px, 60vw);
  top: 35%;
  right: -10%;
  background: radial-gradient(circle, var(--orb-2) 0%, transparent 70%);
  animation: orbFloat2 26s ease-in-out infinite;
  transition: background 0.4s ease;
}

.bg-orb--3 {
  width: min(380px, 55vw);
  height: min(380px, 55vw);
  bottom: -5%;
  left: 30%;
  background: radial-gradient(circle, var(--orb-3) 0%, transparent 72%);
  animation: orbFloat3 30s ease-in-out infinite;
  transition: background 0.4s ease;
}

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-size: 180px 180px;
  mix-blend-mode: var(--noise-blend);
  transition: opacity 0.4s ease;
}

.bg-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 85% 75% at 50% 45%, transparent 35%, var(--vignette) 100%);
  transition: background 0.4s ease;
}

@keyframes meshDrift {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(2%, 3%) scale(1.04); }
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(4%, 6%); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-5%, 4%); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(3%, -5%); }
}

@media (prefers-reduced-motion: reduce) {
  .bg-mesh,
  .bg-orb--1,
  .bg-orb--2,
  .bg-orb--3 {
    animation: none;
  }

  .animate-title {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .gradient-text {
    animation: none;
  }

  .nav-toggle span {
    transition: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Якорные секции — отступ под липкую шапку */
#about,
#schedule,
#speakers,
#venue {
  scroll-margin-top: max(5.5rem, calc(env(safe-area-inset-top, 0px) + 4.5rem));
}

/* —— Layout —— */
.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.section {
  padding: 80px 0 88px;
}

.section-title {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text);
  text-wrap: balance;
}

.muted {
  color: var(--muted);
}

p {
  max-width: 62ch;
  color: var(--text-soft);
}

/* —— Glass cards —— */
.glass {
  background: linear-gradient(
    145deg,
    var(--glass-top) 0%,
    var(--glass-mid) 48%,
    var(--glass-bottom) 100%
  );
  border: 1px solid var(--glass-stroke);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(130%);
  backdrop-filter: blur(var(--blur)) saturate(130%);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.card {
  padding: 28px;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  transition:
    transform var(--duration-normal) var(--ease-spring),
    background var(--duration-normal) var(--ease-out-soft),
    box-shadow var(--duration-normal) var(--ease-out-soft),
    border-color var(--duration-normal) var(--ease-out-soft),
    color var(--duration-fast) ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
  transition-duration: 0.12s;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-primary {
  color: var(--btn-primary-text);
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 10px 32px var(--accent-glow);
}

.btn-ghost {
  color: var(--text);
  background: var(--btn-ghost-bg);
  border: 1px solid var(--btn-ghost-border);
}

.btn-ghost:hover {
  background: var(--overlay-hover-strong);
  border-color: var(--accent-border);
  box-shadow: var(--btn-ghost-shadow);
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  gap: 16px;
}

.brand {
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: color 0.2s ease;
}

.brand:hover {
  color: var(--accent-strong);
}

.brand-logo-wrap {
  display: inline-flex;
  flex-shrink: 0;
  line-height: 0;
}

.brand-logo {
  height: 56px;
  width: auto;
  display: block;
  filter: drop-shadow(var(--logo-shadow));
}

.nav {
  display: flex;
  gap: 6px;
  align-items: center;
}

.nav a {
  color: var(--text-soft);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition:
    color var(--duration-normal) var(--ease-out-soft),
    background var(--duration-normal) var(--ease-out-soft),
    transform var(--duration-fast) var(--ease-out-soft);
}

.nav a:hover {
  color: var(--text);
  background: var(--overlay-hover);
}

.nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav a.is-active {
  color: var(--text);
  background: var(--accent-surface);
  border: 1px solid var(--accent-border);
}

.nav a.is-active:hover {
  background: var(--accent-surface-hover);
}

.nav-toggle {
  display: none;
  position: relative;
  background: var(--btn-ghost-bg);
  border: 1px solid var(--btn-ghost-border);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  transition:
    background var(--duration-normal) var(--ease-out-soft),
    border-color var(--duration-normal) var(--ease-out-soft),
    transform var(--duration-fast) var(--ease-out-soft);
}

.nav-toggle:hover {
  background: var(--overlay-hover-strong);
  border-color: var(--accent-border);
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0;
  background: var(--text);
  border-radius: 2px;
  transition:
    transform 0.38s var(--ease-out-expo),
    opacity 0.22s ease,
    background var(--duration-fast) ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* —— Hero —— */
.hero {
  padding-top: clamp(28px, 6vw, 48px);
}

.hero-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: clamp(300px, 52vh, 520px);
  padding: clamp(28px, 5vw, 56px) clamp(16px, 4vw, 28px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-card > .eyebrow {
  position: absolute;
  top: clamp(22px, 4vw, 40px);
  left: 0;
  right: 0;
  margin-inline: auto;
  width: fit-content;
  max-width: calc(100% - 24px);
  text-align: center;
  z-index: 2;
}

.hero-card .title.hero-title {
  margin: 0;
}

.hero-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--hero-glow) 0%, transparent 60%);
  pointer-events: none;
}

.hero-card > * {
  position: relative;
}

.eyebrow {
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.25rem);
  font-weight: 600;
  margin: 8px 0 12px;
  line-height: 1.12;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

/* Главный заголовок hero: крупный, перенос без разрыва внутри «Вера и Жизнь» */
.title.hero-title {
  font-size: clamp(1.85rem, 4.2vw + 1.05rem, 4.15rem);
  line-height: 1.14;
  max-width: min(100%, 26rem);
  margin-left: auto;
  margin-right: auto;
  overflow-wrap: break-word;
  word-break: normal;
  hyphens: manual;
}

.title.hero-title .gradient-text {
  display: inline-block;
  max-width: 100%;
}

.subtitle {
  color: var(--text-soft);
  font-size: clamp(0.9375rem, 2.5vw, 1.125rem);
  margin: 0 auto 24px;
  max-width: 42rem;
}

/* —— Text animations —— */
.animate-title {
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 1s var(--ease-out-expo) forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.28s; }
.animate-delay-3 { animation-delay: 0.45s; }

.gradient-text {
  background: linear-gradient(
    105deg,
    var(--gradient-stop-1) 0%,
    var(--accent-strong) 35%,
    var(--gradient-stop-2) 65%,
    var(--gradient-stop-1) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shimmer 6s ease-in-out infinite;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

/* —— Schedule —— */
.schedule-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-medium);
  background: var(--btn-ghost-bg);
  color: var(--text-soft);
  cursor: pointer;
  font-size: 0.875rem;
  transition:
    background var(--duration-normal) var(--ease-out-soft),
    border-color var(--duration-normal) var(--ease-out-soft),
    color var(--duration-normal) var(--ease-out-soft),
    transform var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-out-soft);
}

.chip:hover {
  color: var(--text);
  border-color: var(--accent-border);
  transform: translateY(-1px);
}

.chip:active {
  transform: translateY(0) scale(0.98);
}

.chip.active {
  background: var(--accent-surface);
  border-color: var(--accent-border);
  color: var(--accent-strong);
}

.chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.timeline-item:hover {
  border-color: var(--accent-surface-hover);
  background: var(--surface-hover);
  transform: translateX(4px);
}

.timeline-item.is-filtered-out {
  display: none;
}

.timeline-item .time {
  color: var(--accent-strong);
  font-weight: 600;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.timeline-item .info h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}

.timeline-item .info h3:last-child {
  margin-bottom: 0;
}

.timeline-item .info p {
  margin: 0;
  font-size: 0.9375rem;
}

.timeline-item .tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.tag.keynote {
  background: var(--accent-surface);
  border: 1px solid var(--accent-border);
}

.tag.workshop {
  background: rgba(100, 130, 170, 0.15);
  border: 1px solid rgba(100, 130, 170, 0.35);
}

.tag.networking {
  background: rgba(80, 160, 120, 0.12);
  border: 1px solid rgba(80, 160, 120, 0.35);
}

/* —— Speakers / contacts —— */
.grid {
  display: grid;
  gap: 18px;
}

.speakers-grid {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.person {
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.person:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.avatar {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius) var(--radius) 0 0;
  background: linear-gradient(160deg, var(--avatar-bg-start), var(--avatar-bg-end));
  border-bottom: 1px solid var(--border-subtle);
  background-size: cover;
  background-position: center;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--muted);
  overflow: hidden;
  position: relative;
}

.avatar.has-photo {
  background-color: var(--avatar-photo-overlay);
}

.avatar.has-photo span {
  display: none;
}

.person-info {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.person-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
}

.person-role {
  margin: 0;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 500;
}

.person-bio {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.9375rem;
}

/* —— Registration —— */
.reg-card {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 8px;
  padding: 8px;
}

/* —— Venue —— */
.venue-grid {
  grid-template-columns: 1fr 1.6fr;
  align-items: stretch;
  gap: 18px;
}

.venue-grid .glass.card h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 12px;
  color: var(--text);
}

.map-card {
  padding: 10px;
  min-height: 360px;
}

.map-card iframe,
.map-embed {
  border: 0;
  border-radius: calc(var(--radius) - 6px);
  box-shadow: inset 0 0 0 1px var(--iframe-ring);
}

/* —— Reveal on scroll —— */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s var(--ease-out-expo),
    transform 0.9s var(--ease-out-expo);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--footer-border);
  background: var(--footer-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.875rem;
}

.to-top {
  color: var(--text-soft);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 12px;
  margin: -8px -12px;
  border-radius: var(--radius-sm);
  transition:
    color var(--duration-normal) var(--ease-out-soft),
    background var(--duration-normal) var(--ease-out-soft),
    transform var(--duration-fast) var(--ease-spring);
}

.to-top:hover {
  color: var(--accent-strong);
  background: var(--overlay-hover);
}

.to-top:active {
  transform: scale(0.97);
}

.to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* —— Forms —— */
.reg-form {
  display: grid;
  gap: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field span {
  font-size: 0.8125rem;
  color: var(--muted);
}

.field input,
.field select,
.field textarea {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text);
  outline: none;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 4px var(--input-focus-ring);
}

.field .hint {
  font-size: 0.75rem;
  color: var(--muted);
}

.field .error {
  font-size: 0.75rem;
  color: #e8a0a0;
  display: none;
}

.field.invalid .error {
  display: block;
}

.form-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 940px) {
  .venue-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 56px 0 64px;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-card {
    min-height: clamp(260px, 50vh, 440px);
    padding-top: max(28px, env(safe-area-inset-top, 0px));
    padding-bottom: clamp(24px, 6vw, 40px);
    padding-left: max(clamp(14px, 4vw, 22px), env(safe-area-inset-left, 0px));
    padding-right: max(clamp(14px, 4vw, 22px), env(safe-area-inset-right, 0px));
  }

  .hero-card > .eyebrow {
    top: max(18px, calc(env(safe-area-inset-top, 0px) + 10px));
  }

  .title.hero-title {
    font-size: clamp(1.52rem, 5.4vw + 0.72rem, 3.15rem);
    line-height: 1.18;
    max-width: 100%;
    letter-spacing: -0.03em;
    padding-inline: 2px;
  }

  .eyebrow {
    font-size: 0.625rem;
    letter-spacing: 0.14em;
    line-height: 1.45;
    padding-inline: 8px;
  }

  .nav {
    display: none;
    position: absolute;
    right: 4%;
    top: 68px;
    flex-direction: column;
    background: var(--nav-mobile-bg);
    border: 1px solid var(--border-medium);
    padding: 10px;
    border-radius: var(--radius-sm);
    box-shadow: var(--nav-mobile-shadow);
  }

  .nav.show {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .timeline-item:hover {
    transform: none;
  }

  .map-card {
    min-height: 280px;
  }

  .brand-logo {
    height: 44px;
    width: auto;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 380px) {
  .hero-card {
    min-height: clamp(240px, 46vh, 380px);
  }

  .title.hero-title {
    font-size: clamp(1.35rem, 6vw + 0.4rem, 2.35rem);
    line-height: 1.2;
  }
}

/* —— Планшеты и десктоп —— */
@media (min-width: 641px) {
  .container {
    width: min(1140px, 90%);
  }

  .section {
    padding: 88px 0 96px;
  }

  .header-inner {
    padding: 14px 0;
    gap: 20px;
  }

  .nav {
    gap: 8px;
  }

  .nav a {
    padding: 11px 16px;
  }

  .hero-card {
    min-height: clamp(320px, 50vh, 520px);
    padding: clamp(32px, 4.5vw, 60px) clamp(24px, 3.5vw, 40px);
  }

  .hero-card > .eyebrow {
    top: clamp(24px, 3.5vw, 40px);
  }

  .title.hero-title {
    font-size: clamp(1.95rem, 2.5vw + 1.1rem, 4rem);
    max-width: min(100%, 30rem);
  }

  .card {
    padding: 30px 32px;
  }

  .venue-grid {
    gap: 22px;
  }

  .map-card {
    min-height: 380px;
  }

  .speakers-grid {
    gap: 20px;
  }
}

@media (min-width: 941px) {
  .container {
    width: min(1180px, 88%);
  }

  .section {
    padding: 96px 0 104px;
  }

  .header-inner {
    padding: 14px 0;
    gap: 28px;
  }

  .nav {
    gap: 10px;
  }

  .nav a {
    padding: 11px 18px;
    font-size: 1rem;
  }

  .brand {
    font-size: 1.32rem;
    gap: 12px;
  }

  .brand-logo {
    height: 60px;
  }

  .hero {
    padding-top: clamp(36px, 4vw, 56px);
  }

  .hero-card {
    min-height: clamp(360px, 46vh, 580px);
    padding: clamp(40px, 4.5vw, 68px) clamp(28px, 3vw, 48px);
  }

  .hero-card > .eyebrow {
    top: clamp(28px, 3vw, 48px);
  }

  .title.hero-title {
    font-size: clamp(2.1rem, 2.4vw + 1.25rem, 4.5rem);
    max-width: min(100%, 34rem);
    line-height: 1.12;
  }

  .eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.17em;
  }

  .section-title {
    font-size: clamp(1.9rem, 1.5vw + 1.1rem, 2.6rem);
    margin-bottom: 26px;
  }

  .card {
    padding: 32px 38px;
  }

  .venue-grid {
    gap: 26px;
    grid-template-columns: 1fr 1.8fr;
  }

  .map-card {
    min-height: 420px;
    padding: 12px;
  }

  .speakers-grid {
    gap: 22px;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }

  .person-info {
    padding: 22px 24px;
  }

  .timeline {
    gap: 14px;
  }

  .timeline-item {
    grid-template-columns: 124px 1fr;
    gap: 20px;
    padding: 22px 26px;
  }

  .timeline-item:hover {
    transform: translateX(6px);
  }

  .timeline-item .time {
    font-size: 0.9375rem;
  }

  .timeline-item .info h3 {
    font-size: 1.28rem;
  }

  .site-footer {
    padding: 36px 0;
  }

  #about,
  #schedule,
  #speakers,
  #venue {
    scroll-margin-top: max(6rem, calc(env(safe-area-inset-top, 0px) + 5rem));
  }
}

@media (min-width: 1280px) {
  .container {
    width: min(1240px, 86%);
  }

  .section {
    padding: 104px 0 112px;
  }

  .title.hero-title {
    font-size: clamp(2.25rem, 2vw + 1.45rem, 4.85rem);
    max-width: min(100%, 38rem);
  }

  .hero-card {
    min-height: clamp(400px, 42vh, 620px);
  }

  .venue-grid {
    gap: 28px;
  }

  .map-card {
    min-height: 440px;
  }

  .grid {
    gap: 22px;
  }
}

@media (min-width: 1536px) {
  .container {
    width: min(1280px, 82%);
  }

  .section {
    padding: 112px 0 120px;
  }

  .header-inner {
    padding: 16px 0;
  }
}