:root {
  --ink: #0c1017;
  --ink-2: #151b26;
  --panel: rgba(22, 28, 40, 0.72);
  --line: rgba(232, 214, 176, 0.18);
  --gold: #e0c48a;
  --gold-dim: #a88955;
  --mist: #c8d0dc;
  --paper: #eef1f5;
  --danger: #d4786a;
  --ok: #7eb89a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-body: "DM Sans", "Noto Sans SC", system-ui, sans-serif;
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--paper);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(224, 196, 138, 0.14), transparent 55%),
    radial-gradient(900px 600px at 100% 0%, rgba(90, 120, 160, 0.18), transparent 50%),
    linear-gradient(165deg, #0a0e14 0%, #121826 45%, #0c1017 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

img,
video {
  max-width: 100%;
  display: block;
}

.hidden {
  display: none !important;
}

/* ===== Gate ===== */
#gate {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem 3rem;
  overflow: hidden;
}

.gate-bg {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  transform: scale(1.04);
  animation: kenburns 18s ease-in-out infinite alternate;
  z-index: 0;
}

.gate-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 12, 18, 0.35), rgba(8, 12, 18, 0.72)),
    radial-gradient(ellipse at center, transparent 20%, rgba(8, 12, 18, 0.55) 100%);
}

.gate-card {
  position: relative;
  z-index: 1;
  width: min(440px, 100%);
  padding: 2.4rem 2rem 2rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(160deg, rgba(28, 35, 50, 0.9), rgba(14, 18, 28, 0.88));
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  animation: rise 0.9s var(--ease) both;
}

.brand-mark {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 12vw, 4.6rem);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--gold);
  margin: 0 0 0.35rem;
  text-align: center;
}

.brand-sub {
  text-align: center;
  color: var(--mist);
  letter-spacing: 0.35em;
  font-size: 0.78rem;
  text-transform: uppercase;
  margin: 0 0 1.8rem;
}

.gate-hint {
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 1.25rem;
  text-align: center;
}

.challenge-name {
  text-align: center;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--paper);
  margin: 0 0 0.35rem;
  letter-spacing: 0.28em;
}

.challenge-meta {
  text-align: center;
  color: var(--gold-dim);
  font-size: 0.85rem;
  margin: 0 0 1.4rem;
}

.gate-form {
  display: grid;
  gap: 0.85rem;
}

.gate-form input {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(8, 12, 18, 0.55);
  color: var(--paper);
  outline: none;
  text-align: center;
  letter-spacing: 0.08em;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.gate-form input:focus {
  border-color: rgba(224, 196, 138, 0.55);
  box-shadow: 0 0 0 4px rgba(224, 196, 138, 0.12);
}

.gate-form button,
.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.2rem;
  background: linear-gradient(135deg, #e8d2a0, #b89455);
  color: #1a140b;
  font-weight: 650;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 0.25s var(--ease), filter 0.25s var(--ease);
}

.gate-form button:hover,
.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.gate-msg {
  min-height: 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--danger);
  margin: 0.4rem 0 0;
}

.gate-refresh {
  margin-top: 1rem;
  width: 100%;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--mist);
}

.gate-refresh:hover {
  color: var(--paper);
  border-color: rgba(224, 196, 138, 0.35);
}

/* ===== App shell ===== */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 14, 20, 0.78);
  backdrop-filter: blur(14px);
}

.topbar .logo {
  font-family: var(--font-display);
  font-size: 1.55rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.nav button {
  border: 0;
  background: transparent;
  color: var(--mist);
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.nav button:hover,
.nav button.active {
  color: var(--ink);
  background: var(--gold);
}

.view {
  display: none;
  padding: 1.5rem 1.25rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
  animation: fade-up 0.55s var(--ease) both;
}

.view.active {
  display: block;
}

.hero {
  position: relative;
  min-height: min(58vh, 520px);
  margin: -1.5rem -1.25rem 1.5rem;
  padding: 4.5rem 1.5rem 2.5rem;
  display: grid;
  align-content: end;
  gap: 0.75rem;
  background-color: #0c1017;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.home-split {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 1.5rem 1.75rem;
  align-items: start;
  margin-bottom: 0.5rem;
}

.home-col .section-head {
  margin-top: 0;
}

.home-albums .grid.albums {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

.home-people .portrait-grid {
  grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
  gap: 0.65rem;
}

.home-people .portrait-grid .card .meta strong {
  font-size: 0.82rem;
}

.home-people .portrait-grid .card .meta small {
  display: none;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(8, 12, 18, 0.2), rgba(8, 12, 18, 0.86)),
    radial-gradient(800px 400px at 70% 20%, rgba(224, 196, 138, 0.16), transparent 60%);
}

.hero.has-cover {
  color: var(--paper);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  letter-spacing: 0.06em;
  font-weight: 400;
}

.hero p {
  margin: 0;
  max-width: 34rem;
  color: var(--mist);
  line-height: 1.7;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin: 0 0 1.1rem;
}

.section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.section-head span {
  color: var(--gold-dim);
  font-size: 0.85rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.9rem;
}

.grid.albums {
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

.card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: var(--ink-2);
  cursor: pointer;
  isolation: isolate;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
  animation: fade-up 0.7s var(--ease) both;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(224, 196, 138, 0.35);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.card:hover img {
  transform: scale(1.04);
}

.card .meta {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.6rem 0.85rem 0.85rem;
  background: linear-gradient(transparent, rgba(6, 8, 12, 0.92));
}

.card .meta strong {
  display: block;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.card .meta small {
  color: var(--mist);
  font-size: 0.78rem;
}

.portrait-grid .card img {
  aspect-ratio: 3 / 4;
}

/* album detail */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--gold);
  margin-bottom: 1rem;
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.55rem;
}

.photo-grid button {
  padding: 0;
  border: 0;
  background: #0a0e14;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
}

.photo-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform 0.4s var(--ease), opacity 0.4s;
}

.photo-grid button:hover img {
  transform: scale(1.03);
}

/* music */
.track-list {
  display: grid;
  gap: 0.55rem;
}

.track {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.track:hover,
.track.playing {
  border-color: rgba(224, 196, 138, 0.45);
  background: rgba(36, 42, 58, 0.9);
}

.track .idx {
  width: 1.6rem;
  color: var(--gold-dim);
  font-variant-numeric: tabular-nums;
}

.track .title {
  font-weight: 600;
}

.track .artist {
  color: var(--mist);
  font-size: 0.85rem;
}

.player-bar {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  width: min(820px, calc(100% - 1.5rem));
  padding: 0.75rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(120, 90, 40, 0.35);
  background: linear-gradient(180deg, #ebcf96 0%, var(--gold) 45%, #c9a96a 100%);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  display: grid;
  grid-template-columns: minmax(100px, 1.1fr) minmax(140px, 2fr) auto;
  gap: 0.65rem 1rem;
  align-items: center;
  z-index: 30;
}

#gate:not(.hidden) ~ #app .player-bar,
#app.hidden .player-bar {
  display: none;
}

.player-bar .now {
  min-width: 0;
}

.player-bar .now strong,
.player-bar .now span {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-bar .now strong {
  color: var(--ink);
}

.player-bar .now span {
  color: rgba(12, 16, 23, 0.62);
  font-size: 0.8rem;
}

.player-progress {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.45rem;
  align-items: center;
  min-width: 0;
}

.player-progress span {
  font-size: 0.72rem;
  color: rgba(12, 16, 23, 0.62);
  font-variant-numeric: tabular-nums;
  min-width: 2.4em;
}

#seek {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(12, 16, 23, 0.22);
  outline: none;
  cursor: pointer;
}

#seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 0;
  box-shadow: 0 0 0 3px rgba(12, 16, 23, 0.12);
}

#seek::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 0;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.player-controls button {
  appearance: none;
  border: 1px solid rgba(12, 16, 23, 0.12);
  background: rgba(12, 16, 23, 0.08);
  color: var(--ink);
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.95rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}

.player-controls button:hover {
  border-color: rgba(12, 16, 23, 0.28);
  background: rgba(12, 16, 23, 0.14);
}

#btn-play {
  width: 2.35rem;
  height: 2.35rem;
  background: var(--ink);
  color: var(--gold);
  border-color: transparent;
}

#btn-play:hover {
  background: #1a2130;
  color: #ebcf96;
}

#btn-playlist {
  width: auto;
  min-width: 2.6rem;
  padding: 0 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  border-radius: 999px;
  color: var(--ink);
  border-color: rgba(12, 16, 23, 0.22);
  background: rgba(255, 255, 255, 0.28);
}

.playlist-sheet {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: end center;
  padding: 0 0.75rem 5.5rem;
}

.playlist-sheet[hidden] {
  display: none !important;
}

.playlist-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 8, 12, 0.55);
  backdrop-filter: blur(4px);
}

.playlist-panel {
  position: relative;
  width: min(420px, 100%);
  max-height: min(62vh, 520px);
  display: grid;
  grid-template-rows: auto 1fr;
  border-radius: 18px 18px 14px 14px;
  border: 1px solid var(--line);
  background: rgba(14, 18, 26, 0.96);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: fade-up 0.28s var(--ease) both;
}

.playlist-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
}

.playlist-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.playlist-close {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--mist);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.15rem 0.35rem;
}

.playlist-close:hover {
  color: var(--paper);
}

.playlist-body {
  overflow: auto;
  padding: 0.35rem 0.4rem 0.6rem;
}

.playlist-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
  font: inherit;
}

.playlist-item:hover {
  background: rgba(224, 196, 138, 0.08);
}

.playlist-item.playing {
  background: rgba(224, 196, 138, 0.14);
}

.playlist-item .idx {
  color: var(--mist);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  min-width: 1.5em;
}

.playlist-item .who {
  display: block;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.playlist-item .song {
  display: block;
  margin-top: 0.15rem;
  color: var(--mist);
  font-size: 0.82rem;
}

.playlist-item.playing .who,
.playlist-item.playing .song {
  color: var(--gold);
}

.playlist-item .mark {
  color: var(--gold);
  font-size: 0.8rem;
  opacity: 0;
}

.playlist-item.playing .mark {
  opacity: 1;
}

.player-bar audio {
  display: none;
}

#app:not(.hidden) main {
  padding-bottom: 6.5rem;
}

/* video */
.video-list {
  display: grid;
  gap: 0.75rem;
}

.video-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
}

.video-item .badge {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--mist);
}

.video-item .badge.ok {
  color: var(--ok);
  border-color: rgba(126, 184, 154, 0.45);
}

.video-item .badge.wait {
  color: var(--gold-dim);
}

.video-stage {
  margin-top: 1rem;
}

.video-stage video {
  width: 100%;
  max-height: 70vh;
  background: #000;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* lightbox */
#lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(4, 6, 10, 0.92);
  display: none;
  place-items: center;
  padding: 1rem;
}

#lightbox.open {
  display: grid;
  animation: fade 0.25s ease both;
}

#lightbox img {
  max-width: min(96vw, 1200px);
  max-height: 88vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

#lightbox .close,
#lightbox .nav-btn {
  position: absolute;
  border: 0;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
}

#lightbox .close {
  top: 1rem;
  right: 1rem;
}

#lightbox .prev {
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

#lightbox .next {
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes kenburns {
  from {
    transform: scale(1.04) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.5%, -1%, 0);
  }
}

@media (max-width: 720px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .nav {
    justify-content: space-between;
  }

  .nav button {
    flex: 1;
    text-align: center;
    padding: 0.55rem 0.35rem;
    font-size: 0.85rem;
  }

  .home-split {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .player-bar {
    border-radius: 16px;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "now controls"
      "progress progress";
  }

  .player-bar .now {
    grid-area: now;
  }

  .player-progress {
    grid-area: progress;
  }

  .player-controls {
    grid-area: controls;
  }

  .hero {
    min-height: 58vh;
  }
}