:root {
  color-scheme: dark;
  --ink: #f4f7ff;
  --muted: #9aa7bd;
  --panel: rgba(18, 26, 45, .88);
  --panel-solid: #121a2d;
  --line: rgba(255, 255, 255, .12);
  --accent: #82f3cd;
  --accent-ink: #06251e;
  --danger: #ff9c9c;
  font-family: Inter, "Segoe UI", "Microsoft YaHei UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: radial-gradient(circle at 15% 12%, rgba(47,130,246,.2), transparent 34rem), radial-gradient(circle at 85% 72%, rgba(73,235,184,.12), transparent 28rem), #090e19;
}
button, input, select { font: inherit; }
button, .secondary { transition: transform 140ms ease, background 140ms ease, border-color 140ms ease; }
button:hover, .secondary:hover { transform: translateY(-1px); border-color: rgba(130,243,205,.5); }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button, .secondary {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 18px;
  color: var(--ink);
  background: rgba(255,255,255,.06);
  cursor: pointer;
  text-decoration: none;
}
button:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight: 750; }
.quiet { padding: 8px 13px; background: transparent; color: var(--muted); }
.site-header {
  width: min(1280px, calc(100% - 40px));
  margin: auto;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { color: var(--ink); text-decoration: none; font-weight: 780; letter-spacing: .02em; }
.brand span { color: var(--muted); font-size: .72rem; margin-left: .55rem; font-weight: 500; }
.account-bar { display: flex; align-items: center; gap: 10px; }
.privacy, .status-line { color: var(--muted); font-size: .85rem; }
.account-name { padding: 7px 11px; border-radius: 999px; background: rgba(130,243,205,.1); color: var(--accent); font-size: .82rem; }
main { width: min(1280px, calc(100% - 40px)); margin: 0 auto; }
.eyebrow { margin: 0 0 13px; color: var(--accent); font: 700 .72rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .18em; }
h1 { margin: 0; font-size: clamp(2.3rem, 6vw, 5.1rem); line-height: .98; letter-spacing: -.05em; font-weight: 760; }
h2, h3, p { margin-top: 0; }
label { color: var(--muted); font-size: .83rem; }
input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 13px;
  color: var(--ink);
  background: #0b1120;
}
[hidden] { display: none !important; }

.auth-shell { min-height: calc(100vh - 73px); display: grid; grid-template-columns: 1.3fr .7fr; align-items: center; gap: clamp(40px, 8vw, 120px); padding: 70px 0; }
.auth-copy > p:last-child { color: var(--muted); font-size: 1.08rem; line-height: 1.75; max-width: 650px; margin: 28px 0 0; }
.auth-card, .dialog-card { border: 1px solid var(--line); background: var(--panel); backdrop-filter: blur(18px); border-radius: 24px; padding: 28px; box-shadow: 0 30px 80px rgba(0,0,0,.3); }
.auth-card h2, .dialog-card h2 { margin-bottom: 25px; }
.auth-card label, .dialog-card label { display: grid; gap: 8px; margin: 15px 0; }
.auth-card .primary { width: 100%; margin-top: 9px; }
.auth-card .status-line { min-height: 38px; line-height: 1.5; margin: 15px 0 0; }

.library-shell { padding: 52px 0 44px; }
.library-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.library-heading h1 { font-size: clamp(2.5rem, 5vw, 4.7rem); }
.library-heading #library-summary { color: var(--muted); margin: 14px 0 0; }
.upload-panel { border: 1px solid var(--line); background: var(--panel); border-radius: 22px; padding: 20px; margin-bottom: 26px; box-shadow: 0 24px 60px rgba(0,0,0,.2); }
.upload-panel-heading { display: flex; justify-content: space-between; gap: 20px; align-items: start; margin-bottom: 16px; }
.upload-panel-heading h2 { margin-bottom: 5px; }
.upload-panel-heading p { color: var(--muted); margin-bottom: 0; }
.drop-zone { min-height: 160px; border: 1px dashed rgba(255,255,255,.28); border-radius: 16px; display: grid; place-items: center; align-content: center; gap: 8px; cursor: pointer; text-align: center; background: linear-gradient(135deg, rgba(255,255,255,.025), rgba(130,243,205,.035)); }
.drop-zone.over { border-color: var(--accent); background: rgba(130,243,205,.07); }
.drop-zone span { color: var(--muted); font-size: .85rem; }
.drop-zone input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.orb { width: 38px; height: 38px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #fff 0 6%, #82f3cd 22%, #187ea0 58%, #10192c 72%); box-shadow: 0 0 28px rgba(130,243,205,.32); }
.upload-options { display: grid; grid-template-columns: repeat(2, minmax(0, 240px)); gap: 12px; margin-top: 14px; }
.upload-options label { display: grid; gap: 6px; }
.upload-actions { display: flex; align-items: center; gap: 16px; margin-top: 16px; }
.upload-actions span, #viewer-status, #media-meta { color: var(--muted); font-size: .86rem; }
progress { display: block; width: 100%; height: 4px; margin-top: 15px; appearance: none; border: 0; }
progress::-webkit-progress-bar { background: rgba(255,255,255,.06); border-radius: 99px; }
progress::-webkit-progress-value { background: var(--accent); border-radius: 99px; }
.result { border-top: 1px solid var(--line); margin-top: 18px; padding-top: 16px; }
.result > label { display: block; margin-bottom: 8px; }
.link-row { display: flex; gap: 9px; }
.link-row input { flex: 1; min-width: 0; }

.library-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 34px; align-items: start; }
.library-sidebar { position: sticky; top: 18px; }
.library-sidebar nav { display: grid; gap: 6px; }
.nav-item, .album-item { width: 100%; display: flex; align-items: center; justify-content: space-between; border-radius: 12px; padding: 11px 12px; background: transparent; color: var(--muted); text-align: left; border-color: transparent; }
.nav-item:hover, .nav-item.active, .album-item:hover, .album-item.active { background: rgba(255,255,255,.07); color: var(--ink); transform: none; }
.nav-item.active, .album-item.active { border-color: rgba(130,243,205,.26); }
.nav-item b, .album-item b { color: var(--muted); font-size: .74rem; font-weight: 600; }
.album-heading { display: flex; align-items: center; justify-content: space-between; margin: 28px 8px 9px 12px; color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .1em; }
.album-heading button { width: 28px; height: 28px; padding: 0; display: grid; place-items: center; }
.album-row { display: grid; grid-template-columns: minmax(0, 1fr) 34px; gap: 4px; }
.album-more { padding: 0; border-color: transparent; background: transparent; color: var(--muted); letter-spacing: -.1em; }
.library-toolbar { min-height: 60px; display: flex; align-items: start; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.library-toolbar h2 { margin-bottom: 5px; }
.library-toolbar p { color: var(--muted); font-size: .82rem; margin-bottom: 0; }
.search-box { display: flex; align-items: center; gap: 8px; min-width: min(300px, 45%); }
.search-box input { padding: 10px 12px; }
.media-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.media-card { min-width: 0; border: 1px solid var(--line); background: var(--panel); border-radius: 18px; overflow: hidden; transition: transform 160ms ease, border-color 160ms ease; }
.media-card:hover { transform: translateY(-2px); border-color: rgba(130,243,205,.3); }
.media-preview { position: relative; aspect-ratio: 16/10; overflow: hidden; display: grid; place-items: center; background: radial-gradient(circle at 70% 20%, rgba(130,243,205,.2), transparent 45%), linear-gradient(145deg, #172440, #0c1220); }
.media-preview img { width: 100%; height: 100%; object-fit: cover; }
.media-glyph { font-size: 2.4rem; color: rgba(244,247,255,.8); }
.media-kind { position: absolute; left: 10px; top: 10px; border-radius: 999px; padding: 5px 8px; background: rgba(4,8,16,.7); font-size: .7rem; }
.media-card-body { padding: 14px; }
.media-card h3 { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .96rem; margin-bottom: 7px; }
.media-card-meta { color: var(--muted); font-size: .76rem; margin-bottom: 12px; }
.media-actions { display: flex; flex-wrap: wrap; gap: 7px; }
.media-actions button, .media-actions a { padding: 7px 10px; font-size: .75rem; }
.danger { color: var(--danger); }
.empty-state { text-align: center; padding: 90px 20px; color: var(--muted); border: 1px dashed var(--line); border-radius: 20px; }
.empty-state span { display: block; color: var(--accent); font-size: 3rem; margin-bottom: 14px; }
.empty-state h3 { color: var(--ink); margin-bottom: 8px; }

.viewer-shell { padding: 40px 0 30px; }
.viewer-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.viewer-heading h1 { font-size: clamp(1.8rem, 4vw, 3.4rem); line-height: 1.05; }
.viewer-heading #media-meta { margin: 12px 0 0; }
.stage { position: relative; aspect-ratio: 16/9; overflow: hidden; border-radius: 22px; border: 1px solid var(--line); background: #03050a; }
#panorama { width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }
#panorama.dragging { cursor: grabbing; }
#source-video, #source-image { display: none; }
#source-video.flat-source, #source-image.flat-source { display: block; width: 100%; height: 100%; object-fit: contain; background: #03050a; }
#source-video.panorama-source { display: block; position: fixed; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.stage.flat #panorama { display: none; }
.player-info-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; min-height: 30px; margin-top: 6px; color: var(--muted); font-size: .8rem; }
.player-info-row[hidden] { display: none; }
.player-guidance, .buffer-status { position: static; max-width: 100%; padding: 4px 0; background: none; color: var(--muted); font-size: .8rem; }
.projection-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 14px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 14px; }
.projection-controls[hidden] { display: none; }
.projection-controls label { display: inline-flex; align-items: center; gap: 9px; color: var(--muted); font-size: .86rem; white-space: nowrap; }
.projection-controls select { width: auto; min-width: 112px; }
.projection-controls input { width: 140px; accent-color: var(--accent); }
.projection-controls output { min-width: 3ch; font-size: .84rem; }
.projection-note { color: var(--muted); font-size: .78rem; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 16px; }
.controls.flat-controls { display: none; }
.quality-control { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: .86rem; white-space: nowrap; }
.quality-control select { width: auto; border-radius: 999px; padding: 9px 30px 9px 12px; }
.seek-control { display: flex; align-items: center; gap: 10px; width: 100%; margin-top: 8px; }
.seek-control[hidden] { display: none; }
.seek-control span { flex: 0 0 auto; font-size: .8rem; font-variant-numeric: tabular-nums; color: var(--muted); }
#seek { flex: 1 1 0; min-width: 0; width: 100%; height: 44px; margin: 0; padding: 0; border: 0; background: transparent; accent-color: var(--accent); touch-action: none; appearance: none; -webkit-appearance: none; }
#seek::-webkit-slider-runnable-track { height: 6px; border-radius: 3px; background: var(--line); }
#seek::-webkit-slider-thumb { appearance: none; -webkit-appearance: none; width: 26px; height: 26px; margin-top: -10px; border-radius: 50%; background: var(--accent); }
#seek::-moz-range-track { height: 6px; border-radius: 3px; background: var(--line); }
#seek::-moz-range-thumb { width: 26px; height: 26px; border: 0; border-radius: 50%; background: var(--accent); }
#seek:disabled { opacity: .4; }
.fullscreen-button { position: absolute; top: max(12px, env(safe-area-inset-top)); right: max(12px, env(safe-area-inset-right)); z-index: 3; min-height: 44px; padding: 8px 14px; background: rgba(0,0,0,.64); border: 1px solid rgba(255,255,255,.35); color: #fff; }
.player-shell.is-fullscreen { position: fixed; inset: 0; z-index: 10000; width: 100%; height: 100%; max-width: none; margin: 0; padding: 0; background: #03050a; overflow: hidden; }
.player-shell.viewport-fullscreen { height: 100vh; height: 100dvh; }
.player-shell.is-fullscreen .stage { position: absolute; inset: 0; width: 100%; height: 100%; min-height: 0; aspect-ratio: auto; border: 0; border-radius: 0; }
.player-shell.is-fullscreen .player-info-row, .player-shell.is-fullscreen .projection-controls, .player-shell.is-fullscreen #viewer-status, .player-shell.is-fullscreen #optimize-button, .player-shell.is-fullscreen .quality-control { display: none; }
.player-shell.is-fullscreen .playback-panel { position: absolute; z-index: 3; right: max(8px, env(safe-area-inset-right)); bottom: max(6px, env(safe-area-inset-bottom)); left: max(8px, env(safe-area-inset-left)); display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 10px; border-radius: 12px; background: rgba(0,0,0,.6); }
.player-shell.is-fullscreen:not(.has-video) .playback-panel { display: none; }
.player-shell.is-fullscreen .controls { order: -1; flex: 0 0 auto; gap: 0; margin: 0; padding: 0; }
.player-shell.is-fullscreen #play-button { min-width: 52px; min-height: 44px; margin: 0; padding: 6px 10px; border: 0; border-radius: 8px; background: transparent; color: #fff; font-size: .85rem; }
.player-shell.is-fullscreen .seek-control { flex: 1 1 0; min-width: 0; width: auto; margin: 0; gap: 8px; }
.player-shell.is-fullscreen .seek-control span { color: #fff; }
.player-shell.is-fullscreen .playback-panel, .player-shell.is-fullscreen .fullscreen-button { transition: opacity 180ms ease, visibility 180ms ease; }
.player-shell.is-fullscreen:not(.hud-visible) .playback-panel, .player-shell.is-fullscreen:not(.hud-visible) .fullscreen-button { opacity: 0; visibility: hidden; pointer-events: none; }
.player-shell.is-fullscreen:not(.hud-visible) #panorama { cursor: none; }
.player-shell.is-fullscreen .fullscreen-button { min-height: 36px; padding: 5px 10px; font-size: .8rem; }
.buffer-status[hidden] { display: none; }

dialog { width: min(480px, calc(100% - 28px)); padding: 0; color: var(--ink); background: transparent; border: 0; }
dialog::backdrop { background: rgba(2,5,12,.76); backdrop-filter: blur(5px); }
.dialog-card { margin: 0; }
.dialog-actions { display: flex; justify-content: end; gap: 9px; margin-top: 23px; }

@media (max-width: 900px) {
  .auth-shell { grid-template-columns: 1fr; max-width: 680px; margin: auto; }
  .library-layout { grid-template-columns: 1fr; gap: 22px; }
  .library-sidebar { position: static; }
  .library-sidebar #library-nav, #album-list { display: flex; overflow-x: auto; padding-bottom: 4px; }
  .nav-item, .album-item { width: auto; min-width: max-content; gap: 10px; }
  .album-heading { margin-top: 18px; }
  .media-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .site-header, main { width: min(100% - 24px, 1280px); }
  .site-header { height: 62px; }
  .privacy { display: none; }
  .auth-shell { padding: 40px 0; }
  .auth-copy h1 { font-size: 3rem; }
  .library-shell { padding-top: 34px; }
  .library-heading, .viewer-heading, .upload-panel-heading { align-items: stretch; flex-direction: column; }
  .library-heading .primary { align-self: start; }
  .upload-options { grid-template-columns: 1fr; }
  .upload-actions { align-items: stretch; flex-direction: column; }
  .library-toolbar { flex-direction: column; }
  .search-box { width: 100%; min-width: 0; }
  .media-grid { grid-template-columns: 1fr; }
  .link-row { flex-wrap: wrap; }
  .link-row input { flex-basis: 100%; }
  .stage { aspect-ratio: 4/5; border-radius: 16px; }
  .controls { flex-wrap: wrap; }
  #viewer-status { width: 100%; }
}