:root {
  color-scheme: dark;
  --paper: oklch(0.94 0.02 82);
  --paper-soft: oklch(0.9 0.016 82);
  --ink: oklch(0.2 0.015 255);
  --ink-soft: oklch(0.4 0.018 255);
  --line: color-mix(in oklch, var(--paper) 22%, transparent);
  --panel: color-mix(in oklch, var(--ink) 78%, transparent);
  --panel-strong: color-mix(in oklch, var(--ink) 90%, transparent);
  --accent: oklch(0.76 0.11 66);
  --accent-strong: oklch(0.68 0.14 55);
  --shadow: 0 24px 80px color-mix(in oklch, black 58%, transparent);
  --radius: 1.4rem;
  --radius-small: 999px;
  --chrome-width: min(1400px, calc(100vw - 2rem));
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(circle at top, color-mix(in oklch, var(--accent) 28%, transparent), transparent 32%),
    radial-gradient(circle at bottom, color-mix(in oklch, oklch(0.45 0.03 255) 25%, transparent), transparent 42%),
    linear-gradient(180deg, oklch(0.15 0.015 250), oklch(0.11 0.01 252));
  color: var(--paper);
  font-family: "Public Sans", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, color-mix(in oklch, var(--paper) 4%, transparent), transparent 24%),
    radial-gradient(circle at 20% 20%, color-mix(in oklch, white 6%, transparent), transparent 0.4rem);
  opacity: 0.22;
}

.app-shell {
  position: relative;
  width: var(--chrome-width);
  margin: 0 auto;
  padding: 1rem 0 1.25rem;
}

.masthead,
.control-bar,
.caption-panel {
  backdrop-filter: blur(20px);
  background: linear-gradient(
    180deg,
    color-mix(in oklch, var(--panel-strong) 92%, transparent),
    color-mix(in oklch, var(--panel) 90%, transparent)
  );
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.masthead {
  margin-bottom: 1rem;
  border-radius: calc(var(--radius) + 0.4rem);
  padding: 1rem 1.2rem 1.15rem;
}

.eyebrow,
.asset-code,
.jump-number,
.status,
.counter {
  font-family: "DM Mono", monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: color-mix(in oklch, var(--paper) 72%, var(--accent));
  font-size: 0.72rem;
}

.masthead-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: end;
}

h1 {
  margin: 0;
  font-family: "Public Sans", sans-serif;
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.92;
}

.lede {
  max-width: 58rem;
  margin: 0.8rem 0 0;
  color: color-mix(in oklch, var(--paper) 82%, var(--accent) 18%);
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.5;
}

.fullscreen-note {
  margin: 0.85rem 0 0;
  color: color-mix(in oklch, var(--paper) 76%, var(--accent) 24%);
  font-size: 0.92rem;
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  min-height: 2rem;
  padding: 0 0.55rem;
  border-radius: 0.6rem;
  border: 1px solid color-mix(in oklch, var(--paper) 28%, transparent);
  background: color-mix(in oklch, var(--paper) 8%, transparent);
  box-shadow: inset 0 -2px 0 color-mix(in oklch, black 25%, transparent);
  color: var(--paper);
  font: inherit;
  font-weight: 700;
}

.masthead-meta {
  text-align: right;
}

.counter {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
}

.status {
  margin: 0.4rem 0 0;
  color: color-mix(in oklch, var(--paper) 78%, transparent);
  font-size: 0.78rem;
}

.viewer {
  position: relative;
  display: grid;
  grid-template-columns: minmax(3.75rem, 7vw) minmax(0, 1fr) minmax(3.75rem, 7vw);
  align-items: stretch;
  min-height: min(72vh, 900px);
}

.frame {
  position: relative;
  margin: 0;
  border-radius: calc(var(--radius) + 0.6rem);
  overflow: hidden;
  min-height: min(72vh, 900px);
  border: 1px solid color-mix(in oklch, var(--paper) 16%, transparent);
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, oklch(0.14 0.014 252), oklch(0.08 0.008 252));
}

.backdrop-wrap,
.image-wrap,
.hero,
.backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.backdrop {
  object-fit: cover;
  filter: blur(48px) saturate(0.9);
  opacity: 0.35;
  transform: scale(1.08);
}

.image-wrap {
  display: grid;
  place-items: center;
  padding: clamp(1rem, 2vw, 1.5rem);
}

.hero {
  position: relative;
  inset: auto;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 30px 48px rgba(0, 0, 0, 0.3));
  transition: opacity 140ms ease-out, transform 180ms ease-out;
}

.hero.is-preview {
  opacity: 0.86;
  transform: scale(0.995);
}

.caption-panel {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: end;
  border-radius: var(--radius);
  padding: 0.95rem 1rem;
}

.asset-code {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.73rem;
}

.caption {
  margin: 0;
  max-width: 56rem;
  color: var(--paper);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.45;
}

.caption-links {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  justify-content: end;
}

a,
button {
  transition:
    background-color 140ms ease-out,
    border-color 140ms ease-out,
    color 140ms ease-out,
    transform 140ms ease-out;
}

.caption-links a,
.button-group button,
.jump-chip {
  border-radius: var(--radius-small);
  border: 1px solid color-mix(in oklch, var(--paper) 24%, transparent);
}

.caption-links a,
.button-group button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0 1rem;
  text-decoration: none;
  font: inherit;
  color: var(--paper);
  background: color-mix(in oklch, var(--paper) 8%, transparent);
}

.caption-links a:hover,
.button-group button:hover,
.jump-chip:hover,
.edge-nav:hover {
  border-color: color-mix(in oklch, var(--accent) 60%, var(--paper));
  background: color-mix(in oklch, var(--accent) 18%, transparent);
}

.edge-nav {
  border: 0;
  background: transparent;
  color: color-mix(in oklch, var(--paper) 82%, transparent);
  cursor: pointer;
}

.edge-nav span {
  display: inline-flex;
  align-items: center;
  min-height: 100%;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 140ms ease-out;
}

.edge-nav-left {
  justify-content: start;
}

.edge-nav-right {
  justify-content: end;
}

.edge-nav:hover span,
.edge-nav:focus-visible span {
  opacity: 1;
}

.control-bar {
  margin-top: 1rem;
  border-radius: calc(var(--radius) + 0.4rem);
  padding: 0.9rem;
}

.control-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.button-group {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.button-group button {
  cursor: pointer;
}

.button-group button:focus-visible,
.caption-links a:focus-visible,
.jump-chip:focus-visible,
.edge-nav:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hint {
  margin: 0;
  color: color-mix(in oklch, var(--paper) 72%, transparent);
  font-size: 0.9rem;
}

.jump-rail {
  display: flex;
  gap: 0.55rem;
  overflow-x: auto;
  margin-top: 0.9rem;
  padding-bottom: 0.1rem;
  scrollbar-width: thin;
}

.jump-chip {
  display: grid;
  gap: 0.22rem;
  min-width: 9rem;
  padding: 0.75rem 0.85rem;
  text-align: left;
  cursor: pointer;
  background: color-mix(in oklch, var(--paper) 5%, transparent);
  color: var(--paper);
}

.jump-chip.is-active {
  background: color-mix(in oklch, var(--accent) 26%, transparent);
  border-color: color-mix(in oklch, var(--accent) 70%, white);
  transform: translateY(-1px);
}

.jump-number {
  color: var(--accent);
  font-size: 0.68rem;
}

.jump-code {
  font-size: 0.92rem;
  font-weight: 700;
}

.jump-chip.is-active .jump-code {
  color: white;
}

@media (max-width: 900px) {
  .app-shell {
    width: min(100vw - 1rem, 100%);
    padding-top: 0.5rem;
  }

  .masthead-row,
  .caption-panel {
    grid-template-columns: 1fr;
  }

  .masthead-meta,
  .caption-links {
    text-align: left;
    justify-content: start;
  }

  .viewer {
    grid-template-columns: 2.8rem minmax(0, 1fr) 2.8rem;
    min-height: min(66vh, 780px);
  }

  .frame {
    min-height: min(66vh, 780px);
  }

  .control-row {
    flex-direction: column;
    align-items: start;
  }

  .hint {
    font-size: 0.84rem;
  }

  .jump-chip {
    min-width: 7.4rem;
  }
}

@media (max-width: 640px) {
  .masthead,
  .control-bar,
  .caption-panel {
    backdrop-filter: blur(12px);
  }

  .masthead {
    padding: 0.95rem 0.9rem 1rem;
  }

  .caption-panel {
    left: 0.7rem;
    right: 0.7rem;
    bottom: 0.7rem;
    padding: 0.8rem 0.85rem;
  }

  .image-wrap {
    padding: 0.7rem;
  }

  .caption-links a,
  .button-group button {
    min-height: 2.4rem;
    padding-inline: 0.85rem;
  }

  .jump-chip {
    min-width: 6.6rem;
    padding: 0.68rem 0.72rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}

body.immersive-default {
  background: black;
}

body.immersive-default::before,
body.immersive-default .masthead,
body.immersive-default .control-bar,
body.immersive-default .caption-panel,
body.immersive-default .edge-nav,
body.immersive-default .backdrop-wrap {
  display: none;
}

body.immersive-default .app-shell {
  width: 100vw;
  margin: 0;
  padding: 0;
}

body.immersive-default .viewer {
  display: block;
  min-height: 100vh;
}

body.immersive-default .frame {
  min-height: 100vh;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: black;
}

body.immersive-default .image-wrap {
  padding: 0;
}

body.immersive-default .hero {
  max-width: 100vw;
  max-height: 100vh;
  filter: none;
}

.fullscreen-overlay-note {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 0.8rem;
  border-radius: 999px;
  border: 1px solid color-mix(in oklch, var(--paper) 24%, transparent);
  background: color-mix(in oklch, var(--panel-strong) 90%, transparent);
  color: color-mix(in oklch, var(--paper) 88%, var(--accent) 12%);
  font-size: 0.85rem;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  transition: opacity 220ms ease-out, transform 220ms ease-out;
}

.fullscreen-overlay-note.is-hidden {
  opacity: 0;
  transform: translateY(-0.4rem);
  pointer-events: none;
}

.mobile-dock {
  display: none;
}

html:fullscreen body {
  background: black;
}

html:fullscreen body::before,
html:fullscreen .masthead,
html:fullscreen .control-bar,
html:fullscreen .caption-panel,
html:fullscreen .edge-nav,
html:fullscreen .backdrop-wrap,
html:fullscreen .fullscreen-overlay-note,
html:fullscreen .mobile-dock {
  display: none;
}

html:fullscreen .app-shell {
  width: 100vw;
  margin: 0;
  padding: 0;
}

html:fullscreen .viewer {
  display: block;
  min-height: 100vh;
}

html:fullscreen .frame {
  min-height: 100vh;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: black;
}

html:fullscreen .image-wrap {
  padding: 0;
}

html:fullscreen .hero {
  max-width: 100vw;
  max-height: 100vh;
  filter: none;
}

@media (max-width: 900px), (pointer: coarse) {
  .fullscreen-overlay-note {
    top: max(0.75rem, env(safe-area-inset-top));
    left: 0.75rem;
    right: 0.75rem;
    max-width: calc(100vw - 1.5rem);
    font-size: 0.78rem;
    line-height: 1.35;
    border-radius: 1rem;
    white-space: normal;
  }

  body.immersive-default .mobile-dock {
    position: absolute;
    left: 50%;
    bottom: calc(0.85rem + env(safe-area-inset-bottom));
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    transform: translateX(-50%);
    padding: 0.5rem;
    border-radius: 999px;
    border: 1px solid color-mix(in oklch, var(--paper) 24%, transparent);
    background: color-mix(in oklch, var(--panel-strong) 92%, transparent);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
  }

  .mobile-dock button,
  .mobile-counter {
    min-height: 2.9rem;
  }

  .mobile-dock button {
    min-width: 4.4rem;
    padding: 0 1rem;
    border-radius: 999px;
    border: 1px solid color-mix(in oklch, var(--paper) 24%, transparent);
    background: color-mix(in oklch, var(--paper) 10%, transparent);
    color: var(--paper);
    font: inherit;
    font-weight: 700;
  }

  .mobile-counter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 4.8rem;
    margin: 0;
    padding: 0 0.3rem;
    color: var(--accent);
    font-family: "DM Mono", monospace;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }
}