/* Shared UX layer: consistent surfaces, focus, motion and responsive polish. */
:root {
  --surface: #fff;
  --surface-soft: #f7f8fa;
  --surface-raised: #fff;
  --brand: var(--only, #00aff0);
  --brand-strong: #008fc7;
  --focus: #0077b6;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 2px 8px rgba(15, 23, 42, .05);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, .10), 0 2px 8px rgba(15, 23, 42, .06);
  --shadow-lg: 0 24px 64px rgba(15, 23, 42, .18);
  --ease: cubic-bezier(.2, .8, .2, 1);
}

:root[data-theme="dark"] {
  --surface: #111214;
  --surface-soft: #181a1e;
  --surface-raised: #1d1f23;
  --brand-strong: #37c4f7;
  --focus: #5cd2ff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .28), 0 3px 12px rgba(0, 0, 0, .18);
  --shadow-md: 0 12px 34px rgba(0, 0, 0, .34);
  --shadow-lg: 0 28px 72px rgba(0, 0, 0, .5);
}

html { scroll-behavior: smooth; }
body { min-height: 100vh; min-height: 100dvh; line-height: 1.5; }
::selection { background: color-mix(in srgb, var(--brand) 28%, transparent); }

button, input, textarea, select { font: inherit; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }

:where(a, button, input, textarea, select, [role="button"]):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 45%, transparent) !important;
  outline-offset: 3px !important;
}

:where(button, .submit, .publish, .pill, .mini, .tab, .home, .retry, .ghost-btn) {
  transition: transform .16s var(--ease), box-shadow .16s var(--ease), background-color .16s ease,
    border-color .16s ease, opacity .16s ease;
}
:where(button, .submit, .publish, .pill, .mini, .tab, .home, .retry, .ghost-btn):not(:disabled):active {
  transform: translateY(1px) scale(.985);
}
:where(button, input, textarea, select):disabled { cursor: not-allowed; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 20000;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--text, #111);
  color: var(--bg, #fff);
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-md);
  transform: translate(-50%, -160%);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

.topbar {
  border-bottom: 1px solid color-mix(in srgb, var(--line, #e5e5e5) 78%, transparent);
  background: color-mix(in srgb, var(--bg, #fff) 88%, transparent) !important;
  box-shadow: 0 1px 0 rgba(15, 23, 42, .02);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
}

.brand { border-radius: 8px; }
.brand .play {
  box-shadow: 0 5px 14px color-mix(in srgb, var(--brand) 30%, transparent);
  transition: transform .2s var(--ease), box-shadow .2s ease;
}
.brand:hover .play { transform: rotate(-4deg) scale(1.05); box-shadow: 0 7px 18px color-mix(in srgb, var(--brand) 38%, transparent); }

.search input { background: var(--surface-raised); color: var(--text); }
.search button { background: var(--surface-soft); color: var(--text); }
.search:focus-within { filter: drop-shadow(0 2px 7px color-mix(in srgb, var(--focus) 16%, transparent)); }

.avatar-me { box-shadow: 0 0 0 2px var(--bg), 0 0 0 3px color-mix(in srgb, var(--line) 85%, transparent); }
.avatar-menu {
  background: var(--surface-raised) !important;
  border-color: var(--line) !important;
  box-shadow: var(--shadow-md) !important;
  transform-origin: top right;
  animation: oh-pop .15s var(--ease);
}

.upload-btn, .ghost-btn, .mini { background: var(--surface-raised) !important; }
.upload-btn:hover, .ghost-btn:hover, .mini:hover { border-color: color-mix(in srgb, var(--brand) 36%, var(--line)); }

/* Browse and watch experience. */
.page { padding-top: 28px; padding-bottom: 64px; }
.gallery-view .title, .search-view .title, .channel-head .ch-name {
  letter-spacing: -.035em;
}
.gallery { row-gap: 32px; }
.gallery-card {
  border-radius: 14px;
  transition: transform .2s var(--ease);
}
.gallery-card .g-thumb {
  background-color: var(--surface-soft);
  box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s ease;
}
.gallery-card:hover { transform: translateY(-3px); }
.gallery-card:hover .g-thumb { box-shadow: var(--shadow-md); }
.gallery-card .g-title { letter-spacing: -.012em; }
.gallery-card .g-channel { transition: color .15s ease; }
.gallery-card:hover .g-channel { color: var(--text); }
.gallery-card:focus-visible { border-radius: 14px; }

.player { box-shadow: var(--shadow-md); }
.pl-big { backdrop-filter: blur(8px); box-shadow: 0 10px 35px rgba(0, 0, 0, .32); }
.pill:hover { box-shadow: var(--shadow-sm); }
.desc { border: 1px solid transparent; }
.comments { padding-top: 4px; }
.rel-card { transition: background-color .15s ease, transform .15s var(--ease); }
.rel-card:hover { transform: translateX(2px); }

.side-nav { background: var(--surface) !important; }
.side-nav-label { letter-spacing: .1em; }
.nav-item { transition: background-color .15s ease, color .15s ease, transform .15s var(--ease); }
.nav-item:hover { transform: translateX(2px); }
.nav-item.active { background: color-mix(in srgb, var(--brand) 12%, var(--chip)) !important; }

/* Form and account pages. */
body[data-page="login"] .wrap,
body[data-page="profile"] .wrap,
body[data-page="suggest"] .wrap,
body[data-page="age"] .wrap {
  margin-top: clamp(28px, 7vh, 72px);
  padding: clamp(24px, 5vw, 38px);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-raised);
  box-shadow: var(--shadow-md);
}
body[data-page="age"] {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 15% 10%, color-mix(in srgb, var(--brand) 11%, transparent), transparent 36%),
    radial-gradient(circle at 85% 90%, color-mix(in srgb, #8a5cff 10%, transparent), transparent 32%),
    var(--bg);
}
body[data-page="age"] .wrap { margin: 0; }

body[data-page="login"] h1,
body[data-page="profile"] h1,
body[data-page="suggest"] h1 { font-size: clamp(26px, 5vw, 34px); letter-spacing: -.04em; }

.tabs {
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
}
.tab { border: 0 !important; background: transparent !important; }
.tab.active { background: var(--text) !important; color: var(--bg) !important; box-shadow: var(--shadow-sm); }

.field input, .field textarea, select, .copy-row input, .link-row input {
  min-height: 44px;
  background: var(--surface-raised) !important;
  color: var(--text) !important;
  border-color: var(--line) !important;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}
.field textarea { line-height: 1.5; }
.field input:hover, .field textarea:hover, select:hover, .copy-row input:hover { border-color: color-mix(in srgb, var(--text-soft) 48%, var(--line)) !important; }
.field input:focus, .field textarea:focus, select:focus, .copy-row input:focus, .link-row input:focus {
  border-color: var(--brand) !important;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 16%, transparent);
}
.field label { margin-bottom: 6px !important; }
.field .hint { line-height: 1.45; }
.submit, .publish, .home, .retry {
  min-height: 44px;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--text) 13%, transparent);
}
.submit:not(:disabled):hover, .publish:not(:disabled):hover, .home:hover, .retry:hover {
  transform: translateY(-1px);
  box-shadow: 0 9px 22px color-mix(in srgb, var(--text) 18%, transparent);
}
.submit.is-loading, .publish.is-loading { opacity: .72; }

.err:not(:empty), .ok:not(:empty), .status:not(:empty) {
  padding: 10px 12px;
  border-radius: 10px;
  line-height: 1.4;
}
.err:not(:empty) { background: color-mix(in srgb, var(--accent) 9%, transparent); }
.ok:not(:empty), .status:not(:empty) { background: color-mix(in srgb, var(--ok, #1d8a3a) 10%, transparent); }

/* Upload, library, payment and document surfaces. */
body[data-page="upload"] .wrap,
body[data-page="lists"] .wrap { max-width: 980px; }
.page-title { letter-spacing: -.035em; }
.drop {
  border-color: color-mix(in srgb, var(--brand) 28%, var(--line)) !important;
  background:
    radial-gradient(circle at 50% 0, color-mix(in srgb, var(--brand) 10%, transparent), transparent 48%),
    var(--surface-soft) !important;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 3%, transparent);
}
.drop:hover, .drop:focus-visible { border-color: var(--brand) !important; }
.drop .circle { color: var(--brand); box-shadow: inset 0 0 0 1px var(--line); }
.opts {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
}
.card, .list-block, .pending-thumb {
  background: var(--surface-raised);
  border-color: var(--line) !important;
  box-shadow: var(--shadow-sm);
}
.card:hover { box-shadow: var(--shadow-md) !important; border-color: color-mix(in srgb, var(--brand) 28%, var(--line)) !important; }
.edit-modal, .report-modal { backdrop-filter: blur(7px); }
.edit-card, .report-card { background: var(--surface-raised) !important; box-shadow: var(--shadow-lg) !important; }

.doc {
  width: min(100% - 32px, 760px);
  margin-inline: auto;
  padding-bottom: 72px;
}
.doc > h1 { font-size: clamp(28px, 5vw, 40px); letter-spacing: -.045em; }
.doc > .sub, .doc > .updated { font-size: 14px; line-height: 1.6; }
.doc .card {
  border-radius: 16px !important;
  box-shadow: var(--shadow-sm);
}
.doc h2 { letter-spacing: -.02em; }
.doc p, .doc li { line-height: 1.7; }
.hist { display: block; max-width: 100%; overflow-x: auto; }

.nf { width: min(100% - 40px, 560px); }
.nf .code { color: var(--brand) !important; letter-spacing: -.06em; }
.nf h1 { letter-spacing: -.04em; }

.oh-toast-region {
  position: fixed;
  right: 18px;
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 19000;
  display: grid;
  gap: 8px;
  pointer-events: none;
}
.oh-toast {
  max-width: min(360px, calc(100vw - 36px));
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-raised);
  color: var(--text);
  box-shadow: var(--shadow-md);
  font-size: 14px;
  font-weight: 500;
  animation: oh-toast-in .22s var(--ease);
}
.oh-toast.leaving { opacity: 0; transform: translateY(6px); transition: .18s ease; }

@keyframes oh-pop { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
@keyframes oh-toast-in { from { opacity: 0; transform: translateY(8px) scale(.98); } }

@media (max-width: 720px) {
  .topbar { padding-inline: 12px; gap: 10px; }
  .page { padding: 18px 14px 52px; }
  .gallery { gap: 26px 14px; }
  .gallery-card:hover, .rel-card:hover { transform: none; }
  body[data-page="login"], body[data-page="profile"], body[data-page="suggest"] { background: var(--surface-soft); }
  body[data-page="login"] .wrap,
  body[data-page="profile"] .wrap,
  body[data-page="suggest"] .wrap { width: calc(100% - 24px); margin-top: 20px; padding: 24px 18px; border-radius: 16px; }
  .doc { width: min(100% - 28px, 760px); }
  .doc .card { padding: 16px !important; }
  .opts { align-items: stretch; }
  .opts label { display: grid; grid-template-columns: 1fr; gap: 5px; flex: 1 1 140px; }
  .oh-toast-region { left: 14px; right: 14px; }
  .oh-toast { max-width: none; }
}

@media (max-width: 480px) {
  .gallery { grid-template-columns: 1fr; }
  .gallery-card .g-title { font-size: 15px; }
  .row-actions { flex-wrap: wrap; }
  .row-actions > button { flex: 1 1 130px; }
  .copy-row, .link-row { align-items: stretch; }
  .copy-row .mini, .link-row .mini { min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

@media (prefers-contrast: more) {
  :root { --line: color-mix(in srgb, var(--text) 48%, transparent); }
  :where(a, button, input, textarea, select, [role="button"]):focus-visible { outline-width: 4px !important; }
}