.toolbar-actions { display: flex; align-items: center; gap: 10px; }
#videoGrid:empty { display: none; }
.reload-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: transparent;
  color: var(--ink);
}
.reload-button:hover { border-color: var(--ink); }
.reload-button svg { width: 17px; height: 17px; }
.theme-strip { display: none; }
.library-state { position: relative; min-height: 320px; display: grid; place-items: center; border-bottom: 1px solid var(--line); }
.library-state-copy { position: relative; z-index: 1; padding: 44px 24px; text-align: center; max-width: 100%; }
.library-state-number { display: block; margin-bottom: 20px; color: var(--muted); font: 28px "Courier New", monospace; }
.library-state h2 { margin: 0; font-size: 24px; line-height: 1.5; font-weight: 500; overflow-wrap: anywhere; }
.library-state p { margin: 12px auto 0; color: var(--muted); max-width: 440px; font-size: 13px; line-height: 1.8; }
.library-state button { margin-top: 22px; }
.empty-art { display: none; }
.random-button:hover:disabled { transform: none; background: var(--accent); }

/* 02: a dark, asymmetrical archive of unexplained footage. */
html[data-theme="2"] {
  color-scheme: dark;
  --paper: #101915;
  --ink: #e6efe8;
  --muted: #94aa9c;
  --line: #34463b;
  --accent: #b4e4c1;
}
[data-theme="2"] body { font-family: "Courier New", "Microsoft YaHei", monospace; }
[data-theme="2"] .shell { width: min(1480px, 100%); }
[data-theme="2"] .header-inner { min-height: 82px; }
[data-theme="2"] .brand-emblem { border-radius: 3px; color: #101915; }
[data-theme="2"] .brand-name { font-family: Arial, "Microsoft YaHei", sans-serif; }
[data-theme="2"] main { padding-top: 44px; }
[data-theme="2"] .collection-heading { align-items: center; }
[data-theme="2"] .eyebrow { color: #b4e4c1; font-size: 11px; line-height: 1.7; }
[data-theme="2"] .eyebrow::before { background: #b4e4c1; width: 6px; height: 6px; flex-shrink: 0; }
[data-theme="2"] h1 { font-family: Georgia, "Microsoft YaHei", serif; font-size: 68px; font-weight: 400; line-height: 1.15; }
[data-theme="2"] .heading-count { color: #b4e4c1; }
[data-theme="2"] .intro { color: #aabeb0; width: 285px; font-size: 13px; }
[data-theme="2"] .theme-strip {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 32px;
  padding: 12px 0;
  border-block: 1px solid var(--line);
  font-size: 10px;
  color: var(--muted);
}
[data-theme="2"] .collection-toolbar { border-top: 0; margin-top: 0; }
[data-theme="2"] .random-button { background: transparent; color: #b4e4c1; border-color: #b4e4c1; border-radius: 0; font-weight: 400; }
[data-theme="2"] .random-button:hover { color: #101915; background: #b4e4c1; }
[data-theme="2"] .video-grid { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); grid-template-rows: repeat(2, 320px); gap: 22px 30px; }
[data-theme="2"] .video-card:first-child { grid-row: 1 / 3; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; }
[data-theme="2"] .video-slot { height: 220px; border-radius: 0; border-color: var(--line); background: #070c09; }
[data-theme="2"] .video-card:first-child .video-slot { height: 100%; min-height: 0; }
[data-theme="2"] .video-card { --card-accent: #b4e4c1; }
[data-theme="2"] .video-card:nth-child(2) { --card-accent: #e4cb86; }
[data-theme="2"] .video-card:nth-child(3) { --card-accent: #9ecedb; }
[data-theme="2"] .card-number::before { content: "REC / "; }
[data-theme="2"] .card-meta { padding-top: 16px; padding-bottom: 14px; }
[data-theme="2"] .card-meta h2 { font-size: 17px; font-weight: 400; }
[data-theme="2"] .card-meta .card-mark { border-radius: 0; color: var(--muted); }
[data-theme="2"] .video-card.selected .card-mark { color: #101915; }
[data-theme="2"] .card-kicker { color: #b4e4c1; font-size: 10px; }
[data-theme="2"] .language-menu { background: #17261c; border-color: var(--line); }
[data-theme="2"] .language-option:hover, [data-theme="2"] .language-option[aria-checked="true"] { color: #101915; }
[data-theme="2"] .library-state { min-height: 380px; border: 1px solid var(--line); margin-top: 20px; }
[data-theme="2"] .library-state-number { color: #b4e4c1; }

/* 03: an athletic red masthead and a numbered, horizontal film list. */
html[data-theme="3"] {
  --paper: #fbfbfa;
  --ink: #171918;
  --muted: #737572;
  --line: #d9dbd7;
  --accent: #ee4935;
}
[data-theme="3"] .header { background: #171918; color: white; border: 0; }
[data-theme="3"] .header-inner { min-height: 78px; }
[data-theme="3"] .brand-emblem { color: white; border-color: #ee4935; border-radius: 3px; }
[data-theme="3"] .nav-item { color: #cccfc9; }
[data-theme="3"] .nav-item.active { color: white; }
[data-theme="3"] .nav-item.active::after { background: #ee4935; height: 3px; }
[data-theme="3"] .language-trigger { border-color: #ffffff30; }
[data-theme="3"] .language-menu { color: #171918; }
[data-theme="3"] main { padding-top: 0; }
[data-theme="3"] .collection-heading {
  position: relative;
  padding: 42px 48px 44px;
  margin-inline: -48px;
  background: #ee4935;
  color: #fff;
  align-items: end;
}
[data-theme="3"] .eyebrow { font-size: 11px; font-weight: 700; line-height: 1.6; }
[data-theme="3"] .eyebrow::before { background: #fff; width: 18px; height: 3px; flex-shrink: 0; }
[data-theme="3"] h1 { font-size: 80px; line-height: 1.05; font-weight: 900; font-style: italic; text-transform: uppercase; }
[data-theme="3"] .heading-count { color: #ffe2b7; font-size: 18px; font-weight: 700; }
[data-theme="3"] .intro { color: #fff; font-size: 13px; width: 275px; }
[data-theme="3"] .theme-strip { display: flex; justify-content: space-between; gap: 24px; padding: 13px 0; border-bottom: 3px solid var(--ink); font: 11px "Courier New", monospace; font-weight: 700; }
[data-theme="3"] .collection-toolbar { margin-top: 0; border-top: 0; padding-block: 16px; }
[data-theme="3"] .random-button { color: white; border-color: var(--accent); border-radius: 0; }
[data-theme="3"] .random-button:hover { background: #cf3020; border-color: #cf3020; }
[data-theme="3"] .video-grid { display: flex; flex-direction: column; gap: 0; padding-top: 0; }
[data-theme="3"] .video-card {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) minmax(0, .72fr);
  align-items: center;
  gap: 30px;
  padding-block: 28px;
  border-bottom: 1px solid var(--line);
  --card-accent: #ee4935;
}
[data-theme="3"] .video-card:nth-child(2) { --card-accent: #171918; }
[data-theme="3"] .video-card:nth-child(3) { --card-accent: #375fcb; }
[data-theme="3"] .card-topline { display: flex; flex-direction: column; align-items: flex-start; gap: 15px; margin: 0; }
[data-theme="3"] .card-number { color: var(--ink); font: italic 700 46px Arial, sans-serif; }
[data-theme="3"] .card-duration { color: var(--muted); }
[data-theme="3"] .video-slot { width: 100%; height: 300px; border: 0; border-radius: 0; background: #171918; }
[data-theme="3"] .card-meta { border: 0; padding: 24px 0; align-items: start; }
[data-theme="3"] .card-kicker { color: #d53826; font-size: 11px; font-weight: 700; margin-bottom: 16px; }
[data-theme="3"] .card-meta h2 { font-size: 30px; font-style: italic; font-weight: 800; text-transform: uppercase; }
[data-theme="3"] .card-mark { display: none; }
[data-theme="3"] .library-state { min-height: 350px; margin-top: 24px; overflow: hidden; background: #171918; color: white; }
[data-theme="3"] .library-state p { color: #bfc3bb; }
[data-theme="3"] .empty-art { display: block; position: absolute; inset: 0; overflow: hidden; }
[data-theme="3"] .empty-edition { position: absolute; left: 18px; bottom: -45px; color: #ffffff0b; font: italic 900 300px/.9 Arial, sans-serif; }
[data-theme="3"] .empty-art::after { content: ""; position: absolute; width: 8px; height: 170%; right: 15%; top: -35%; background: #ee4935; transform: rotate(23deg); box-shadow: 20px 0 0 #ee4935, 40px 0 0 #ee4935; }
[data-theme="3"] .library-state-copy { text-align: left; justify-self: start; padding: 48px; max-width: 80%; }
[data-theme="3"] .library-state-number { color: #ee4935; font-weight: 700; }

/* 04: a quiet, pastel contact sheet with gently staggered frames. */
html[data-theme="4"] {
  --paper: #eff7f4;
  --ink: #244b42;
  --muted: #687e76;
  --line: #ceded6;
  --accent: #f5d283;
}
[data-theme="4"] .header { border: 0; }
[data-theme="4"] .header-inner { min-height: 90px; }
[data-theme="4"] .brand-name { font-family: Georgia, "Microsoft YaHei", serif; font-weight: 500; }
[data-theme="4"] .brand-emblem { background: #d4e8e0; border-color: #aac7ba; }
[data-theme="4"] main { padding-top: 25px; }
[data-theme="4"] .collection-heading { display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; padding: 8px 0 32px; }
[data-theme="4"] .eyebrow { justify-content: center; font-size: 11px; color: #687e76; }
[data-theme="4"] .eyebrow::before { width: 6px; height: 6px; border-radius: 50%; background: #91b5a5; }
[data-theme="4"] .heading-row { justify-content: center; gap: 10px; margin-top: 22px; }
[data-theme="4"] h1 { font: 400 70px/1.2 Georgia, "Microsoft YaHei", serif; }
[data-theme="4"] .heading-count { color: #91a99f; font-size: 12px; }
[data-theme="4"] .intro { width: min(440px, 100%); color: #687e76; font-size: 14px; line-height: 1.9; }
[data-theme="4"] .collection-toolbar { margin-top: 0; border-top-color: var(--line); padding-block: 17px; }
[data-theme="4"] .random-button { border-color: #d8bb7e; color: #4c452f; border-radius: 4px; font-weight: 400; }
[data-theme="4"] .random-button:hover { background: #ecd09a; }
[data-theme="4"] .reload-button { border-radius: 50%; }
[data-theme="4"] .video-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; gap: 26px; padding-top: 26px; padding-bottom: 24px; }
[data-theme="4"] .video-card { position: relative; background: #fff; padding: 13px; border-radius: 6px; --card-accent: #f3d7ce; }
[data-theme="4"] .video-card:nth-child(2) { margin-top: 48px; --card-accent: #d3e7f2; }
[data-theme="4"] .video-card:nth-child(3) { margin-top: 16px; --card-accent: #e7e7bc; }
[data-theme="4"] .card-topline { padding-inline: 3px; margin-bottom: 11px; }
[data-theme="4"] .video-slot { height: 330px; border: 0; border-radius: 3px; }
[data-theme="4"] .card-meta { border: 0; padding: 21px 4px 12px; }
[data-theme="4"] .card-meta h2 { font: 400 23px/1.4 Georgia, "Microsoft YaHei", serif; }
[data-theme="4"] .card-kicker { text-transform: none; margin-bottom: 9px; font: 11px Arial, "Microsoft YaHei", sans-serif; }
[data-theme="4"] .card-mark { border-color: var(--line); }
[data-theme="4"] .video-card.selected .card-mark { border-color: var(--line); }
[data-theme="4"] .language-menu { border-color: var(--line); box-shadow: 0 12px 40px #244b4212; }
[data-theme="4"] .library-state { min-height: 350px; margin-top: 22px; overflow: hidden; color: #fff; border: 0; }
[data-theme="4"] .empty-art { display: block; position: absolute; inset: 0; background: #377c84 url("./assets/calm.jpg") center 45% / cover no-repeat; }
[data-theme="4"] .empty-art::after { content: ""; position: absolute; inset: 0; background: #062d3d62; }
[data-theme="4"] .empty-edition { display: none; }
[data-theme="4"] .library-state-copy { padding-block: 50px; }
[data-theme="4"] .library-state h2 { font-family: Georgia, "Microsoft YaHei", serif; font-size: 28px; }
[data-theme="4"] .library-state p, [data-theme="4"] .library-state-number { color: #fff; }
[data-theme="4"] .library-state-number { font-size: 18px; }

@media (max-width: 1100px) {
  [data-theme="2"] h1 { font-size: 58px; }
  [data-theme="2"] .video-grid { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 20px; }
  [data-theme="3"] .collection-heading { margin-inline: -32px; padding-inline: 32px; }
  [data-theme="3"] h1 { font-size: 62px; }
  [data-theme="3"] .video-card { grid-template-columns: 48px minmax(0, 1fr) minmax(0, .65fr); gap: 22px; }
  [data-theme="3"] .card-number { font-size: 36px; }
  [data-theme="3"] .card-meta h2 { font-size: 24px; }
  [data-theme="4"] h1 { font-size: 60px; }
  [data-theme="4"] .video-grid { gap: 18px; }
  [data-theme="4"] .video-slot { height: 280px; }
}
@media (max-width: 760px) {
  [data-theme="2"] .collection-heading { align-items: start; }
  [data-theme="2"] .intro { width: auto; }
  [data-theme="2"] h1 { font-size: 52px; }
  [data-theme="2"] .theme-strip { font-size: 9px; gap: 16px; margin-top: 25px; }
  [data-theme="2"] .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-rows: auto; }
  [data-theme="2"] .video-card:first-child { grid-row: auto; grid-column: 1 / -1; }
  [data-theme="2"] .video-card:first-child .video-slot { height: 420px; min-height: 0; }
  [data-theme="2"] .video-slot { height: 240px; }
  [data-theme="3"] .collection-heading { margin-inline: -24px; padding: 32px 24px; }
  [data-theme="3"] h1 { font-size: 54px; }
  [data-theme="3"] .intro { width: auto; }
  [data-theme="3"] .theme-strip { font-size: 10px; }
  [data-theme="3"] .video-card { grid-template-columns: 45px minmax(0, 1fr); gap: 15px 20px; }
  [data-theme="3"] .video-card:first-child .video-slot { height: 290px; }
  [data-theme="3"] .video-slot { height: 290px; }
  [data-theme="3"] .card-meta { grid-column: 2; padding: 0; }
  [data-theme="3"] .card-kicker { margin-bottom: 8px; }
  [data-theme="3"] .library-state-copy { padding: 36px 28px; }
  [data-theme="3"] .empty-art::after { right: 5%; }
  [data-theme="4"] h1 { font-size: 52px; }
  [data-theme="4"] .video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  [data-theme="4"] .video-card:first-child { grid-column: auto; }
  [data-theme="4"] .video-card:first-child .video-slot { height: 290px; }
  [data-theme="4"] .video-slot { height: 290px; }
  [data-theme="4"] .video-card:nth-child(2) { margin-top: 32px; }
  [data-theme="4"] .video-card:nth-child(3) { margin-top: 0; }
  [data-theme="4"] .collection-heading { padding-bottom: 16px; }
}
@media (max-width: 480px) {
  .toolbar-actions { gap: 7px; }
  .reload-button { width: 34px; height: 38px; }
  .library-state h2 { font-size: 21px; }
  .library-state-copy { padding: 36px 18px; }
  [data-theme="2"] main { padding-top: 30px; }
  [data-theme="2"] h1 { font-size: 44px; }
  [data-theme="2"] .eyebrow { font-size: 10px; }
  [data-theme="2"] .theme-strip { flex-direction: column; gap: 7px; margin-top: 22px; }
  [data-theme="2"] .video-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  [data-theme="2"] .video-card:first-child { grid-column: auto; }
  [data-theme="2"] .video-slot, [data-theme="2"] .video-card:first-child .video-slot { height: auto; aspect-ratio: 4 / 5; }
  [data-theme="2"] .library-state { min-height: 300px; }
  [data-theme="3"] .collection-heading { margin-inline: -20px; padding-inline: 20px; }
  [data-theme="3"] h1 { font-size: 48px; }
  [data-theme="3"] .eyebrow { font-size: 10px; }
  [data-theme="3"] .theme-strip { flex-direction: column; gap: 7px; font-size: 10px; }
  [data-theme="3"] .video-card { grid-template-columns: 32px minmax(0, 1fr); gap: 12px; padding-block: 22px; }
  [data-theme="3"] .video-slot, [data-theme="3"] .video-card:first-child .video-slot { height: auto; aspect-ratio: 3 / 4; }
  [data-theme="3"] .card-number { font-size: 25px; }
  [data-theme="3"] .card-duration { font-size: 9px; }
  [data-theme="3"] .card-meta h2 { font-size: 23px; }
  [data-theme="3"] .library-state { min-height: 320px; }
  [data-theme="3"] .library-state-copy { max-width: 88%; padding: 30px 22px; }
  [data-theme="3"] .empty-edition { font-size: 220px; bottom: -30px; left: 0; }
  [data-theme="4"] main { padding-top: 20px; }
  [data-theme="4"] h1 { font-size: 42px; }
  [data-theme="4"] .heading-row { gap: 5px; }
  [data-theme="4"] .heading-count { font-size: 10px; }
  [data-theme="4"] .intro { font-size: 13px; }
  [data-theme="4"] .video-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 22px; }
  [data-theme="4"] .video-card:nth-child(2), [data-theme="4"] .video-card:nth-child(3) { margin-top: 0; }
  [data-theme="4"] .video-slot, [data-theme="4"] .video-card:first-child .video-slot { height: auto; aspect-ratio: 4 / 5; }
  [data-theme="4"] .library-state { min-height: 320px; }
  [data-theme="4"] .library-state h2 { font-size: 24px; }
}