:root {
  /* Морская бирюза — насыщенная, не «неон» */
  --sea-deep: #033640;
  --sea-mid: #0a5c68;
  --sea-bright: #1498a8;
  --sea-foam: #5ec4c8;
  --sea-mist: rgba(94, 196, 200, 0.18);

  /* Бронза / золото — читаемые, без свечения */
  --bronze: #8f6b32;
  --gold: #b8923f;
  --gold-ink: #d4b56a;

  /* Дневник экспедиции */
  --ink: #07161c;
  --ink-soft: #0c222a;
  --plate: #0a1c24;
  --plate-text: #e6f0ee;
  --plate-muted: #9bb8b6;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Cormorant Garamond", "Source Serif 4", Georgia, serif;
  --font-body: "Manrope", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--plate-text);
  background: var(--sea-deep);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ========== Фон: насыщенная вода ========== */
.sea {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.sea__water {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 55% at 50% -5%, rgba(46, 180, 190, 0.45), transparent 58%),
    radial-gradient(ellipse 70% 50% at 20% 70%, rgba(8, 90, 100, 0.5), transparent 55%),
    radial-gradient(ellipse 60% 40% at 85% 85%, rgba(4, 55, 65, 0.7), transparent 50%),
    linear-gradient(
      180deg,
      #0e6a76 0%,
      #08707c 18%,
      #055560 42%,
      #033a44 68%,
      #022830 100%
    );
}

.sea__rays {
  position: absolute;
  inset: 0;
  mix-blend-mode: soft-light;
}

.sea__rays span {
  position: absolute;
  top: -8%;
  height: 75%;
  background: linear-gradient(
    180deg,
    rgba(220, 245, 240, 0.55) 0%,
    rgba(120, 210, 210, 0.18) 35%,
    transparent 100%
  );
  filter: blur(10px);
  transform-origin: top center;
  animation: ray-sway 16s ease-in-out infinite alternate;
}

.sea__rays span:nth-child(1) { left: 18%; width: 7%; transform: skewX(-14deg); animation-delay: 0s; }
.sea__rays span:nth-child(2) { left: 32%; width: 11%; transform: skewX(-10deg); animation-delay: -3s; opacity: 0.75; }
.sea__rays span:nth-child(3) { left: 48%; width: 8%; transform: skewX(-12deg); animation-delay: -6s; }
.sea__rays span:nth-child(4) { left: 61%; width: 5%; transform: skewX(-8deg); animation-delay: -2s; opacity: 0.6; }
.sea__rays span:nth-child(5) { left: 72%; width: 9%; transform: skewX(-15deg); animation-delay: -8s; opacity: 0.7; }

.sea__haze {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 100% 40% at 50% 100%, rgba(2, 30, 36, 0.75), transparent 60%),
    linear-gradient(180deg, transparent 30%, rgba(4, 50, 58, 0.35) 100%);
  backdrop-filter: blur(0.4px);
}

.sea__silt span {
  position: absolute;
  border-radius: 50%;
  background: rgba(190, 230, 225, 0.35);
  animation: silt-drift linear infinite;
}

@keyframes ray-sway {
  from { opacity: 0.45; transform: skewX(-14deg) translateX(-10px); }
  to { opacity: 0.85; transform: skewX(-8deg) translateX(14px); }
}

@keyframes silt-drift {
  0% { transform: translate3d(0, 0, 0); opacity: 0; }
  12% { opacity: 0.55; }
  100% { transform: translate3d(12px, -110vh, 0); opacity: 0; }
}

/* ========== Дневниковые блоки: тёмные + золотая рамка ========== */
.journal-plate {
  background: var(--plate);
  color: var(--plate-text);
  border: 1.5px solid var(--gold);
  box-shadow: none;
  position: relative;
  z-index: 1;
}

.journal-plate::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(143, 107, 50, 0.45);
  pointer-events: none;
}

.topbar {
  width: min(420px, calc(100% - 1.5rem));
  margin: 1rem auto 0.5rem;
  padding: 0.85rem 1.1rem 0.95rem;
  text-align: center;
}

.topbar__eyebrow {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--plate-muted);
}

.topbar__title {
  margin: 0.3rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 3.2vw, 2rem);
  color: var(--gold-ink);
  letter-spacing: 0.03em;
}

.topbar__sub {
  margin: 0.25rem 0 0;
  font-size: 0.78rem;
  color: var(--plate-muted);
  letter-spacing: 0.04em;
}

/* ========== Сцена ========== */
.stage {
  position: relative;
  z-index: 1;
  flex: 1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0.5rem 0.75rem;
}

.nav-btn {
  width: 46px;
  height: 46px;
  border-radius: 2px;
  border: 1.5px solid var(--gold);
  background: var(--plate);
  color: var(--gold-ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  box-shadow: none;
}

.nav-btn:hover:not(:disabled) {
  background: var(--ink-soft);
  border-color: var(--gold-ink);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: default;
}

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

.carousel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

/* Рамка журнала вокруг слайда */
.carousel__frame {
  position: relative;
  padding: 8px;
  background: var(--plate);
  border: 1.5px solid var(--gold);
  width: min(100%, 392px);
}

.carousel__frame::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(143, 107, 50, 0.45);
  pointer-events: none;
  z-index: 3;
}

.carousel__viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 307 / 436;
  overflow: hidden;
  background: #024048;
  touch-action: pan-y;
}

.carousel__track {
  display: flex;
  height: 100%;
  will-change: transform;
  transition: transform 0.7s var(--ease);
}

.carousel__slide {
  flex: 0 0 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
  /* Бирюза сильнее; золото/бронза читаемы, без «свечения» */
  filter:
    saturate(1.35)
    contrast(1.06)
    brightness(0.97)
    sepia(0.08)
    hue-rotate(-8deg);
  transform: scale(1.03);
  transition: transform 1s var(--ease), filter 0.6s ease;
}

.carousel__slide.is-active img {
  transform: scale(1);
  animation: kenburns 14s ease-in-out alternate infinite;
}

.carousel__slide.is-active.is-entering img {
  animation: none;
}

@keyframes kenburns {
  from { transform: scale(1) translate(0, 0); }
  to { transform: scale(1.05) translate(-0.8%, -0.6%); }
}

/* ========== FX поверх каждого слайда ========== */
.slide-fx {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

/* Насыщенная бирюзовая вода + приглушение ярких бликов золота */
.slide-fx__grade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      rgba(20, 150, 165, 0.28) 0%,
      rgba(8, 100, 110, 0.12) 28%,
      rgba(4, 70, 80, 0.08) 55%,
      rgba(2, 40, 48, 0.35) 100%
    ),
    radial-gradient(
      ellipse 80% 50% at 50% 0%,
      rgba(90, 210, 215, 0.22),
      transparent 70%
    );
  mix-blend-mode: soft-light;
}

.slide-fx__grade::after {
  /* гасит «свечение» золота: лёгкое затемнение верхних бликов */
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 60% 40% at 50% 35%,
    transparent 40%,
    rgba(3, 40, 48, 0.18) 100%
  );
  mix-blend-mode: multiply;
  opacity: 0.55;
}

.slide-fx__rays {
  position: absolute;
  inset: 0;
  mix-blend-mode: screen;
  opacity: 0.55;
}

.slide-fx__rays span {
  position: absolute;
  top: -5%;
  height: 70%;
  background: linear-gradient(
    180deg,
    rgba(230, 250, 245, 0.7) 0%,
    rgba(140, 220, 220, 0.25) 40%,
    transparent 100%
  );
  filter: blur(6px);
  transform-origin: top center;
  animation: slide-ray 12s ease-in-out infinite alternate;
}

.slide-fx__rays span:nth-child(1) { left: 12%; width: 9%; transform: skewX(-16deg); }
.slide-fx__rays span:nth-child(2) { left: 28%; width: 14%; transform: skewX(-11deg); animation-delay: -2.5s; opacity: 0.8; }
.slide-fx__rays span:nth-child(3) { left: 52%; width: 8%; transform: skewX(-13deg); animation-delay: -5s; }
.slide-fx__rays span:nth-child(4) { left: 68%; width: 11%; transform: skewX(-9deg); animation-delay: -1s; opacity: 0.65; }

@keyframes slide-ray {
  from { opacity: 0.4; transform: skewX(-16deg) translateX(-6px); }
  to { opacity: 0.9; transform: skewX(-9deg) translateX(10px); }
}

/* Дымка / глубина */
.slide-fx__haze {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 55% at 50% 110%, rgba(2, 35, 42, 0.55), transparent 55%),
    linear-gradient(180deg, rgba(180, 230, 230, 0.06) 0%, transparent 25%, rgba(4, 55, 62, 0.2) 100%);
  animation: haze-breathe 10s ease-in-out infinite alternate;
}

@keyframes haze-breathe {
  from { opacity: 0.75; }
  to { opacity: 1; }
}

.slide-fx__silt span {
  position: absolute;
  border-radius: 50%;
  background: rgba(200, 235, 230, 0.4);
  animation: silt-float linear infinite;
}

@keyframes silt-float {
  0% { transform: translate3d(0, 20px, 0); opacity: 0; }
  10% { opacity: 0.5; }
  100% { transform: translate3d(8px, -120%, 0); opacity: 0; }
}

/* ========== Мета-панель дневника ========== */
.carousel__meta {
  width: min(100%, 392px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.95rem;
}

.depth-meter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--plate-muted);
}

.depth-meter__bar {
  flex: 1;
  height: 3px;
  background: rgba(155, 184, 182, 0.2);
  overflow: hidden;
}

.depth-meter__fill {
  height: 100%;
  width: 0%;
  background: var(--bronze);
  transition: width 0.7s var(--ease);
}

.depth-meter__value {
  color: var(--gold-ink);
  font-variant-numeric: tabular-nums;
  min-width: 3.2rem;
  text-align: right;
}

.carousel__counter {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gold-ink);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.carousel__dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
  max-width: 392px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 1px;
  border: 1px solid var(--bronze);
  background: transparent;
  padding: 0;
  cursor: pointer;
  transition: background 0.25s, width 0.3s, border-color 0.25s;
}

.dot[aria-selected="true"] {
  width: 20px;
  background: var(--gold);
  border-color: var(--gold);
}

.dot:hover {
  border-color: var(--gold-ink);
}

.dot:focus-visible {
  outline: 2px solid var(--gold-ink);
  outline-offset: 3px;
}

/* ========== Подвал ========== */
.footer {
  width: min(420px, calc(100% - 1.5rem));
  margin: 0.35rem auto 1.1rem;
  padding: 0.75rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.65rem 1.25rem;
  text-align: center;
}

.footer__quote {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.98rem;
  color: var(--plate-muted);
}

.footer__auto {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-ink);
  background: var(--ink);
  border: 1.5px solid var(--gold);
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s;
  box-shadow: none;
}

.footer__auto[aria-pressed="true"] {
  background: var(--ink-soft);
  border-color: var(--gold-ink);
  color: var(--plate-text);
}

.footer__auto:focus-visible {
  outline: 2px solid var(--gold-ink);
  outline-offset: 3px;
}

/* ========== A11y / responsive ========== */
@media (prefers-reduced-motion: reduce) {
  .carousel__track,
  .carousel__slide img,
  .depth-meter__fill,
  .nav-btn,
  .dot {
    transition: none !important;
    animation: none !important;
  }

  .sea__rays span,
  .slide-fx__rays span,
  .slide-fx__haze,
  .sea__silt span,
  .slide-fx__silt span {
    animation: none !important;
  }

  .carousel__slide.is-active img {
    transform: none;
  }
}

@media (max-width: 720px) {
  .stage {
    grid-template-columns: 1fr;
    padding-inline: 0.5rem;
  }

  .nav-btn {
    position: absolute;
    bottom: 6.2rem;
    z-index: 3;
    width: 40px;
    height: 40px;
  }

  .nav-btn--prev { left: 0.65rem; }
  .nav-btn--next { right: 0.65rem; }

  .carousel__frame {
    width: min(100%, 340px);
  }

  .carousel__meta {
    width: min(100%, 340px);
  }
}

@media (min-width: 900px) {
  .carousel__frame {
    width: min(100%, 440px);
  }

  .carousel__meta {
    width: min(100%, 440px);
  }
}