:root {
  --font-display: "Cormorant Garamond", "Times New Roman", serif;
  --font-body: "Jost", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.25vw, 1rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.02rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.15vw, 2.25rem);
  --text-hero: clamp(3rem, 1rem + 8vw, 7rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.125rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 680ms cubic-bezier(0.16, 1, 0.3, 1);
}

:root,
[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #110d0a;
  --color-surface: rgba(16, 11, 7, 0.84);
  --color-surface-strong: rgba(8, 6, 4, 0.94);
  --color-surface-soft: rgba(196, 162, 101, 0.075);
  --color-border: rgba(196, 162, 101, 0.3);
  --color-border-soft: rgba(231, 221, 204, 0.11);
  --color-text: #e7ddcc;
  --color-text-muted: #ad9f8b;
  --color-text-faint: #766a5a;
  --color-accent: #c4a265;
  --color-accent-strong: #e1c482;
  --color-shadow: rgba(0, 0, 0, 0.62);
  --page-glow-1: rgba(196, 162, 101, 0.2);
  --page-glow-2: rgba(78, 47, 20, 0.22);
}

[data-theme="light"] {
  color-scheme: light;
  --color-bg: #efe7dc;
  --color-surface: rgba(250, 246, 238, 0.86);
  --color-surface-strong: rgba(255, 252, 246, 0.95);
  --color-surface-soft: rgba(110, 80, 43, 0.075);
  --color-border: rgba(110, 80, 43, 0.28);
  --color-border-soft: rgba(45, 35, 25, 0.12);
  --color-text: #2a2119;
  --color-text-muted: #675848;
  --color-text-faint: #9a8a77;
  --color-accent: #8c6a32;
  --color-accent-strong: #6f5121;
  --color-shadow: rgba(69, 45, 22, 0.18);
  --page-glow-1: rgba(145, 101, 42, 0.16);
  --page-glow-2: rgba(255, 255, 255, 0.55);
}

body {
  padding-bottom: clamp(88px, 9vw, 120px);
  background:
    radial-gradient(circle at 12% 0%, var(--page-glow-1), transparent 34rem),
    radial-gradient(circle at 100% 80%, var(--page-glow-2), transparent 36rem),
    linear-gradient(180deg, var(--color-bg), var(--color-bg));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(circle at top, black, transparent 72%);
}

.skip-link {
  position: fixed;
  left: var(--space-4);
  top: var(--space-4);
  z-index: 200;
  transform: translateY(-160%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface-strong);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 140;
  width: 100%;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
}

/* компактный верхний бар */

.topbar {
  position: sticky;
  top: var(--space-2);
  z-index: 100;
  width: min(1200px, calc(100% - clamp(16px, 5vw, 56px)));
  margin: var(--space-2) auto 0;
  display: grid;
  grid-template-columns: minmax(170px, auto) 1fr auto;
  align-items: center;
  gap: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--color-surface-strong) 86%, transparent);
  box-shadow: 0 16px 40px var(--color-shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 4px 10px;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  min-height: 40px;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
  flex: 0 0 auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.18em;
  line-height: 1;
  text-transform: uppercase;
}

.brand-subtitle {
  color: var(--color-text-faint);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.slide-nav {
  display: flex;
  gap: var(--space-1);
  justify-content: flex-start;
  overflow-x: auto;
  scrollbar-width: none;
  padding-inline: var(--space-1);
  min-width: 0;
  max-width: 100%;
}

.slide-nav::-webkit-scrollbar {
  display: none;
}

.slide-link {
  min-width: 30px;
  min-height: 30px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-decoration: none;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

.slide-link:hover,
.slide-link:focus-visible,
.slide-link.is-active {
  color: var(--color-text);
  background: var(--color-surface-soft);
}

.slide-link:active {
  transform: translateY(1px);
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-width: 36px;
}

.icon-button {
  min-width: 36px;
  min-height: 36px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-soft);
  background: color-mix(in srgb, var(--color-surface) 84%, transparent);
  color: var(--color-text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

.icon-button:hover,
.icon-button[aria-pressed="true"] {
  color: var(--color-text);
  border-color: var(--color-border);
  background: var(--color-surface-soft);
}

.icon-button:active {
  transform: translateY(1px);
}

.icon-button svg {
  width: 16px;
  height: 16px;
}

.page {
  width: min(1200px, calc(100% - clamp(16px, 5vw, 56px)));
  margin-inline: auto;
}

.hero {
  min-height: min(740px, calc(100dvh - 98px));
  display: grid;
  align-items: center;
  padding: clamp(var(--space-12), 10vw, var(--space-20)) 0 var(--space-12);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 1fr);
  align-items: center;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
}

.hero-copy {
  max-width: 650px;
  min-width: 0;
}

.kicker {
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero h1 {
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(3rem, 6.2vw, 5.5rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  text-transform: uppercase;
}

.hero-lede {
  margin-top: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  max-width: 50ch;
  text-transform: uppercase;
}

.hero-note {
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.hero-note strong {
  color: var(--color-text);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-5);
  color: var(--color-text);
  font-size: var(--text-sm);
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.button-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #120e0a;
}

.button-secondary {
  background: var(--color-surface);
}

.button:hover {
  background: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
  color: #120e0a;
}

.button:active {
  transform: translateY(1px);
}

.hero-preview {
  position: relative;
  min-width: 0;
}

.hero-preview::before {
  content: "";
  position: absolute;
  inset: -10%;
  z-index: -1;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 22%, transparent), transparent 62%);
  filter: blur(8px);
}

.preview-card,
.slide-frame {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.035), rgba(0, 0, 0, 0.34));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.08) inset,
    0 34px 88px var(--color-shadow);
  padding: 1px;
  overflow: hidden;
}

.preview-card {
  transform: rotate(-1.2deg);
}

.preview-card img,
.slide-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: calc(var(--radius-xl) - 1px);
  background: var(--color-surface-soft);
}

.slides {
  display: grid;
  gap: clamp(var(--space-10), 7vw, var(--space-20));
  padding: 0 0 var(--space-20);
}

.deck-slide {
  scroll-margin-top: 104px;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.deck-slide.is-visible {
  opacity: 1;
  transform: none;
}

.slide-caption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.slide-caption span:first-child {
  color: var(--color-accent);
}

.img-fallback {
  min-height: 420px;
  display: grid;
  place-items: center;
  border-radius: calc(var(--radius-xl) - 1px);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--color-accent) 9%, transparent), transparent),
    var(--color-surface-strong);
  color: var(--color-text-muted);
  padding: var(--space-8);
  text-align: center;
}

/* компактный плеер справа */

.player {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 110;
  width: min(320px, calc(100% - 24px));
  transform: none;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-surface-strong) 92%, transparent);
  box-shadow: 0 16px 46px var(--color-shadow);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 6px 10px;
  min-width: 0;
}

.player-play {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface-soft);
  color: var(--color-text);
  transition: background var(--transition), transform var(--transition);
}

.player-play:hover {
  background: color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.player-play:active {
  transform: translateY(1px);
}

.player-play svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.player-mute {
  min-width: 32px;
  min-height: 32px;
}

.player-mute svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.player-range {
  width: 100%;
  min-width: 80px;
  accent-color: var(--color-accent);
}

.player-label {
  grid-column: 1 / -1;
  margin-top: 2px;
  min-width: 0;
  display: block;
  color: var(--color-text);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}

/* «наверх» повыше, чтобы не конфликтовал с плеером */

.back-to-top {
  position: fixed;
  right: var(--space-4);
  bottom: calc(var(--space-4) + 72px);
  z-index: 130;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.site-footer {
  width: min(1200px, calc(100% - clamp(16px, 5vw, 56px)));
  margin: 0 auto;
  padding: var(--space-8) 0 var(--space-16);
  border-top: 1px solid var(--color-border-soft);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}

.site-footer p {
  max-width: 92ch;
}

/* адаптация */

@media (max-width: 1080px) {
  .topbar {
    grid-template-columns: 1fr auto;
    border-radius: var(--radius-xl);
  }

  .slide-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: start;
    padding-bottom: var(--space-1);
  }

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

  .hero {
    min-height: auto;
  }

  .hero-preview {
    max-width: 820px;
  }
}

@media (max-width: 720px) {
  body {
    padding-bottom: 122px;
  }

  .topbar {
    top: var(--space-2);
    width: calc(100% - 24px);
    max-width: calc(100vw - 24px);
    gap: var(--space-2);
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .brand {
    padding-right: var(--space-2);
  }

  .brand-subtitle {
    display: none;
  }

  .page,
  .site-footer {
    width: calc(100% - 24px);
  }

  .hero {
    padding-top: var(--space-12);
  }

  .hero h1 {
    letter-spacing: 0.12em;
    text-indent: 0.12em;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .slide-caption {
    padding-inline: var(--space-1);
  }

  .slide-frame {
    border-radius: var(--radius-md);
  }

  .slide-frame img,
  .img-fallback {
    border-radius: calc(var(--radius-md) - 1px);
  }

  .player {
    right: 50%;
    bottom: var(--space-3);
    transform: translateX(50%);
    width: calc(100vw - 24px);
    grid-template-columns: auto minmax(0, 1fr) auto;
    border-radius: var(--radius-xl);
  }

  .back-to-top {
    right: var(--space-3);
    bottom: calc(var(--space-3) + 80px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .deck-slide {
    opacity: 1;
    transform: none;
  }
}