/*
 * OneLab UI kit — design tokens, base and components.
 *
 * Tokens are plain custom properties on :root (light) and :root[data-theme="dark"] /
 * system-dark; a product overrides them with /onelab-ui/brand.css (admin settings) or its own
 * stylesheet. Base and components live in the "onelab" cascade layer, so any unlayered product
 * rule wins without specificity games. Logical properties only (RTL), no external fonts, no
 * inline styles (CSP style-src 'self').
 */

/* ===================================================================== tokens (light) */
:root {
  /* brand inputs */
  --ui-primary: #2f5bea;
  --ui-on-primary: #ffffff;
  --ui-accent: #e2603a;
  --ui-on-accent: #ffffff;

  /* neutrals */
  --ui-bg: #f7f7f5;
  --ui-surface: #ffffff;
  --ui-surface-2: #f1f1ee;
  --ui-surface-3: #e8e8e4;
  --ui-ink: #16171a;
  --ui-ink-2: #55585f;
  --ui-ink-3: #868a92;
  --ui-line: #e2e2dd;
  --ui-line-strong: #cfcfc8;
  --ui-scrim: rgb(10 10 12 / .48);

  /* status */
  --ui-good: #1f7a4d;
  --ui-warn: #a86a00;
  --ui-bad: #b3261e;
  --ui-info: #2f5bea;
  --ui-star: #f2a900;

  /* derived roles */
  --ui-primary-soft: color-mix(in oklab, var(--ui-primary) 12%, var(--ui-surface));
  --ui-primary-hover: color-mix(in oklab, var(--ui-primary) 88%, var(--ui-ink));
  --ui-accent-soft: color-mix(in oklab, var(--ui-accent) 14%, var(--ui-surface));
  --ui-bad-soft: color-mix(in oklab, var(--ui-bad) 12%, var(--ui-surface));
  --ui-good-soft: color-mix(in oklab, var(--ui-good) 12%, var(--ui-surface));
  --ui-focus: color-mix(in oklab, var(--ui-primary) 70%, transparent);
  --ui-hover: color-mix(in oklab, var(--ui-ink) 5%, transparent);
  --ui-press: color-mix(in oklab, var(--ui-ink) 9%, transparent);
  --ui-skeleton: color-mix(in oklab, var(--ui-ink) 7%, var(--ui-surface));
  --ui-skeleton-shine: color-mix(in oklab, var(--ui-surface) 70%, transparent);

  /* typography */
  --ui-font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  --ui-font-display: var(--ui-font-body);
  --ui-font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --ui-text-xs: .75rem;
  --ui-text-sm: .875rem;
  --ui-text-md: 1rem;
  --ui-text-lg: 1.125rem;
  --ui-text-xl: 1.25rem;
  --ui-text-2xl: clamp(1.375rem, 1.2rem + .8vw, 1.625rem);
  --ui-text-3xl: clamp(1.625rem, 1.3rem + 1.6vw, 2.125rem);
  --ui-text-4xl: clamp(2rem, 1.45rem + 2.8vw, 2.875rem);
  --ui-text-5xl: clamp(2.5rem, 1.6rem + 4.6vw, 4rem);
  --ui-leading: 1.55;
  --ui-leading-tight: 1.15;
  --ui-weight-body: 400;
  --ui-weight-strong: 600;
  --ui-weight-display: 650;
  --ui-tracking-display: -.015em;

  /* spacing (4px grid) */
  --ui-space-1: .25rem;
  --ui-space-2: .5rem;
  --ui-space-3: .75rem;
  --ui-space-4: 1rem;
  --ui-space-5: 1.25rem;
  --ui-space-6: 1.5rem;
  --ui-space-8: 2rem;
  --ui-space-10: 2.5rem;
  --ui-space-12: 3rem;
  --ui-space-16: 4rem;
  --ui-gutter: clamp(1rem, .6rem + 2vw, 2rem);
  --ui-container: 72rem;
  --ui-measure: 66ch;

  /* shape */
  --ui-radius: 14px;
  --ui-radius-sm: calc(var(--ui-radius) * .55);
  --ui-radius-lg: calc(var(--ui-radius) * 1.45);
  --ui-radius-xl: calc(var(--ui-radius) * 2);
  --ui-radius-pill: 999px;
  --ui-control-h: 2.875rem;
  --ui-control-h-sm: 2.25rem;
  --ui-control-h-lg: 3.375rem;
  --ui-tap: 44px;

  /* elevation */
  --ui-shadow-color: 220 15% 10%;
  --ui-shadow-1: 0 1px 2px hsl(var(--ui-shadow-color) / .06), 0 1px 3px hsl(var(--ui-shadow-color) / .06);
  --ui-shadow-2: 0 2px 4px hsl(var(--ui-shadow-color) / .05), 0 8px 24px -8px hsl(var(--ui-shadow-color) / .16);
  --ui-shadow-3: 0 4px 10px hsl(var(--ui-shadow-color) / .06), 0 22px 48px -18px hsl(var(--ui-shadow-color) / .28);
  --ui-shadow-4: 0 10px 24px hsl(var(--ui-shadow-color) / .1), 0 40px 90px -30px hsl(var(--ui-shadow-color) / .45);

  /* motion */
  --ui-ease-out: cubic-bezier(.2, .8, .2, 1);
  --ui-ease-in-out: cubic-bezier(.65, 0, .35, 1);
  --ui-ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --ui-dur-1: 120ms;
  --ui-dur-2: 200ms;
  --ui-dur-3: 320ms;
  --ui-dur-4: 480ms;

  /* layers */
  --ui-z-header: 50;
  --ui-z-dropdown: 200;
  --ui-z-sheet: 1000;
  --ui-z-toast: 1100;

  /* device */
  --ui-safe-top: env(safe-area-inset-top, 0px);
  --ui-safe-bottom: env(safe-area-inset-bottom, 0px);
  --ui-header-h: 3.75rem;

  color-scheme: light;
}

/* ===================================================================== tokens (dark) */
:root[data-theme="dark"] {
  --ui-bg: #0f1012;
  --ui-surface: #17181b;
  --ui-surface-2: #1f2024;
  --ui-surface-3: #2a2b30;
  --ui-ink: #ececee;
  --ui-ink-2: #a9abb2;
  --ui-ink-3: #7c7f87;
  --ui-line: #2c2d32;
  --ui-line-strong: #3b3c42;
  --ui-scrim: rgb(0 0 0 / .62);
  --ui-good: #4cc38a;
  --ui-warn: #e7a73a;
  --ui-bad: #ff8a80;
  --ui-info: #8ab4ff;
  --ui-shadow-color: 0 0% 0%;
  --ui-primary-hover: color-mix(in oklab, var(--ui-primary) 85%, white);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"], :root:not([data-theme]) {
    --ui-bg: #0f1012;
    --ui-surface: #17181b;
    --ui-surface-2: #1f2024;
    --ui-surface-3: #2a2b30;
    --ui-ink: #ececee;
    --ui-ink-2: #a9abb2;
    --ui-ink-3: #7c7f87;
    --ui-line: #2c2d32;
    --ui-line-strong: #3b3c42;
    --ui-scrim: rgb(0 0 0 / .62);
    --ui-good: #4cc38a;
    --ui-warn: #e7a73a;
    --ui-bad: #ff8a80;
    --ui-info: #8ab4ff;
    --ui-shadow-color: 0 0% 0%;
    --ui-primary-hover: color-mix(in oklab, var(--ui-primary) 85%, white);
    color-scheme: dark;
  }
}

/* scripts that need comfortable line height and their own system faces */
:root:lang(ar), :root:lang(fa), :root:lang(ur) {
  --ui-font-body: "Noto Sans Arabic", "Segoe UI", Tahoma, "Geeza Pro", system-ui, sans-serif;
  --ui-leading: 1.75;
  --ui-tracking-display: 0;
}
:root:lang(ur) { --ui-font-body: "Noto Nastaliq Urdu", "Jameel Noori Nastaleeq", "Noto Sans Arabic", "Segoe UI", Tahoma, sans-serif; --ui-leading: 1.95; }
:root:lang(hi) { --ui-font-body: "Noto Sans Devanagari", "Nirmala UI", "Kohinoor Devanagari", system-ui, sans-serif; --ui-leading: 1.7; }
:root:lang(th) { --ui-font-body: "Noto Sans Thai", "Leelawadee UI", Thonburi, system-ui, sans-serif; --ui-leading: 1.75; }
:root:lang(ja) { --ui-font-body: system-ui, "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", Meiryo, sans-serif; --ui-tracking-display: 0; }
:root:lang(zh) { --ui-font-body: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif; --ui-tracking-display: 0; }

@media (prefers-reduced-motion: reduce) {
  :root { --ui-dur-1: 1ms; --ui-dur-2: 1ms; --ui-dur-3: 1ms; --ui-dur-4: 1ms; }
}

@layer onelab {

/* ===================================================================== base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--ui-header-h) + var(--ui-space-4)); }
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--ui-bg);
  color: var(--ui-ink);
  font-family: var(--ui-font-body);
  font-size: var(--ui-text-md);
  font-weight: var(--ui-weight-body);
  line-height: var(--ui-leading);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}
img, svg, video, canvas, picture { display: block; max-width: 100%; }
img, video { height: auto; }
button, input, select, textarea { font: inherit; color: inherit; letter-spacing: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration-color: color-mix(in oklab, currentColor 35%, transparent); text-underline-offset: .2em; }
a:hover { text-decoration-color: currentColor; }
h1, h2, h3, h4, .ui-display {
  font-family: var(--ui-font-display);
  font-weight: var(--ui-weight-display);
  letter-spacing: var(--ui-tracking-display);
  line-height: var(--ui-leading-tight);
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: var(--ui-text-4xl); }
h2 { font-size: var(--ui-text-3xl); }
h3 { font-size: var(--ui-text-2xl); }
h4 { font-size: var(--ui-text-xl); }
p { margin: 0; text-wrap: pretty; }
[hidden] { display: none !important; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--ui-focus); outline-offset: 2px; }
::selection { background: var(--ui-primary-soft); }
[dir="rtl"] .ui-flip-rtl { transform: scaleX(-1); }

.ui-sr-only {
  position: absolute !important; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.ui-skip {
  position: fixed; inset-inline-start: var(--ui-space-3); inset-block-start: -4rem; z-index: var(--ui-z-toast);
  padding: var(--ui-space-2) var(--ui-space-4); border-radius: var(--ui-radius-sm);
  background: var(--ui-ink); color: var(--ui-bg); text-decoration: none; font-weight: var(--ui-weight-strong);
  transition: inset-block-start var(--ui-dur-2) var(--ui-ease-out);
}
.ui-skip:focus { inset-block-start: var(--ui-space-3); }

/* ===================================================================== layout helpers */
.ui-container { inline-size: min(100% - 2 * var(--ui-gutter), var(--ui-container)); margin-inline: auto; }
.ui-stack { display: flex; flex-direction: column; gap: var(--ui-gap, var(--ui-space-4)); }
.ui-cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ui-gap, var(--ui-space-2)); }
.ui-row { display: flex; align-items: center; gap: var(--ui-gap, var(--ui-space-3)); }
.ui-grow { flex: 1 1 auto; min-inline-size: 0; }
.ui-grid { display: grid; gap: var(--ui-gap, var(--ui-space-4)); grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--ui-grid-min, 16rem)), 1fr)); }
.ui-prose { max-inline-size: var(--ui-measure); }
.ui-prose > * + * { margin-block-start: .9em; }
.ui-muted { color: var(--ui-ink-2); }
.ui-subtle { color: var(--ui-ink-3); }
.ui-small { font-size: var(--ui-text-sm); }
.ui-tiny { font-size: var(--ui-text-xs); }
.ui-num { font-variant-numeric: tabular-nums; }
.ui-lede { font-size: var(--ui-text-lg); color: var(--ui-ink-2); max-inline-size: 60ch; }
.ui-eyebrow { font-size: var(--ui-text-xs); font-weight: var(--ui-weight-strong); letter-spacing: .08em; text-transform: uppercase; color: var(--ui-ink-2); }
.ui-defer { content-visibility: auto; contain-intrinsic-size: auto 600px; }

.ui-i { inline-size: 1.25rem; block-size: 1.25rem; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ui-i-sm { inline-size: 1rem; block-size: 1rem; }
.ui-i-lg { inline-size: 1.5rem; block-size: 1.5rem; }

/* ===================================================================== buttons */
.ui-btn {
  --b-bg: var(--ui-surface);
  --b-ink: var(--ui-ink);
  --b-line: var(--ui-line-strong);
  --b-h: var(--ui-control-h);
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: var(--ui-space-2);
  min-block-size: var(--b-h); min-inline-size: var(--b-h);
  padding: 0 calc(var(--b-h) * .42);
  border: 1px solid var(--b-line); border-radius: var(--ui-radius-pill);
  background: var(--b-bg); color: var(--b-ink);
  font-weight: var(--ui-weight-strong); font-size: var(--ui-text-sm); line-height: 1.2;
  text-decoration: none; white-space: nowrap; user-select: none;
  transition: background-color var(--ui-dur-2), border-color var(--ui-dur-2), color var(--ui-dur-2),
              box-shadow var(--ui-dur-2), transform var(--ui-dur-1) var(--ui-ease-out);
}
.ui-btn:hover { --b-bg: color-mix(in oklab, var(--ui-surface) 92%, var(--ui-ink)); }
.ui-btn:active { transform: scale(.97); }
.ui-btn:disabled, .ui-btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.ui-btn-primary { --b-bg: var(--ui-primary); --b-ink: var(--ui-on-primary); --b-line: var(--ui-primary); }
.ui-btn-primary:hover { --b-bg: var(--ui-primary-hover); --b-line: var(--ui-primary-hover); }
.ui-btn-accent { --b-bg: var(--ui-accent); --b-ink: var(--ui-on-accent); --b-line: var(--ui-accent); }
.ui-btn-accent:hover { --b-bg: color-mix(in oklab, var(--ui-accent) 88%, var(--ui-ink)); }
.ui-btn-ink { --b-bg: var(--ui-ink); --b-ink: var(--ui-bg); --b-line: var(--ui-ink); }
.ui-btn-ink:hover { --b-bg: color-mix(in oklab, var(--ui-ink) 86%, var(--ui-bg)); }
.ui-btn-quiet { --b-bg: transparent; --b-line: transparent; }
.ui-btn-quiet:hover { --b-bg: var(--ui-hover); }
.ui-btn-soft { --b-bg: var(--ui-primary-soft); --b-ink: var(--ui-primary); --b-line: transparent; }
.ui-btn-danger { --b-ink: var(--ui-bad); }
.ui-btn-danger.ui-btn-primary { --b-bg: var(--ui-bad); --b-line: var(--ui-bad); --b-ink: #fff; }
.ui-btn-sm { --b-h: var(--ui-control-h-sm); font-size: var(--ui-text-xs); }
.ui-btn-lg { --b-h: var(--ui-control-h-lg); font-size: var(--ui-text-md); }
.ui-btn-block { inline-size: 100%; }
.ui-btn-icon { padding: 0; inline-size: var(--b-h); }
.ui-btn[aria-pressed="true"] { --b-bg: var(--ui-primary-soft); --b-ink: var(--ui-primary); --b-line: color-mix(in oklab, var(--ui-primary) 35%, transparent); }
.ui-btn[aria-busy="true"] { color: transparent; pointer-events: none; }
.ui-btn[aria-busy="true"]::after {
  content: ""; position: absolute; inset: 0; margin: auto; inline-size: 1.1em; block-size: 1.1em;
  border-radius: 50%; border: 2px solid var(--b-ink); border-right-color: transparent;
  animation: ui-spin .7s linear infinite;
}
.ui-link { background: none; border: 0; padding: 0; color: var(--ui-primary); font-weight: var(--ui-weight-strong); text-decoration: underline; text-underline-offset: .2em; cursor: pointer; }

.ui-spinner { inline-size: 1.25rem; block-size: 1.25rem; border-radius: 50%; border: 2px solid var(--ui-line-strong); border-inline-end-color: var(--ui-primary); animation: ui-spin .7s linear infinite; }
@keyframes ui-spin { to { transform: rotate(360deg); } }

/* ===================================================================== form controls */
.ui-form { display: grid; gap: var(--ui-space-5); }
.ui-field { display: grid; gap: var(--ui-space-2); min-inline-size: 0; }
.ui-label { font-weight: var(--ui-weight-strong); font-size: var(--ui-text-sm); display: flex; align-items: baseline; gap: var(--ui-space-2); flex-wrap: wrap; }
.ui-label .ui-opt { font-weight: 400; color: var(--ui-ink-3); font-size: var(--ui-text-xs); }
.ui-hint { font-size: var(--ui-text-sm); color: var(--ui-ink-2); }
.ui-error { font-size: var(--ui-text-sm); color: var(--ui-bad); display: flex; gap: var(--ui-space-1); align-items: center; }
fieldset.ui-field { border: 0; margin: 0; padding: 0; }

.ui-input, .ui-select, .ui-textarea {
  inline-size: 100%; min-block-size: var(--ui-control-h);
  padding: .65rem .9rem;
  border: 1px solid var(--ui-line-strong); border-radius: var(--ui-radius-sm);
  background: var(--ui-surface); color: var(--ui-ink);
  font-size: max(16px, var(--ui-text-md)); /* no zoom on iOS */
  transition: border-color var(--ui-dur-2), box-shadow var(--ui-dur-2), background-color var(--ui-dur-2);
  appearance: none;
}
.ui-textarea { min-block-size: 7.5rem; resize: vertical; line-height: var(--ui-leading); }
.ui-input::placeholder, .ui-textarea::placeholder { color: var(--ui-ink-3); }
.ui-input:hover, .ui-select:hover, .ui-textarea:hover { border-color: color-mix(in oklab, var(--ui-line-strong) 50%, var(--ui-ink-2)); }
.ui-input:focus-visible, .ui-select:focus-visible, .ui-textarea:focus-visible,
.ui-input:focus, .ui-select:focus, .ui-textarea:focus {
  outline: none; border-color: var(--ui-primary);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ui-primary) 22%, transparent);
}
.ui-input[aria-invalid="true"], .ui-select[aria-invalid="true"], .ui-textarea[aria-invalid="true"] { border-color: var(--ui-bad); }
.ui-input:disabled, .ui-select:disabled, .ui-textarea:disabled { opacity: .6; cursor: not-allowed; }
.ui-select {
  padding-inline-end: 2.5rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--ui-ink-2) 50%), linear-gradient(135deg, var(--ui-ink-2) 50%, transparent 50%);
  background-size: 5px 5px; background-repeat: no-repeat;
  background-position: calc(100% - 1.25rem) 50%, calc(100% - .95rem) 50%;
}
[dir="rtl"] .ui-select { background-position: .95rem 50%, 1.25rem 50%; }
.ui-input-group { position: relative; display: flex; align-items: center; }
.ui-input-group > .ui-i { position: absolute; inset-inline-start: .85rem; color: var(--ui-ink-3); pointer-events: none; }
.ui-input-group > .ui-i ~ .ui-input { padding-inline-start: 2.6rem; }
.ui-counter { font-size: var(--ui-text-xs); color: var(--ui-ink-3); text-align: end; font-variant-numeric: tabular-nums; }

.ui-check { display: flex; align-items: flex-start; gap: var(--ui-space-3); cursor: pointer; min-block-size: var(--ui-tap); padding-block: .6rem; }
.ui-check input {
  appearance: none; flex: none; margin: .1rem 0 0; inline-size: 1.25rem; block-size: 1.25rem;
  border: 1.5px solid var(--ui-line-strong); border-radius: .35rem; background: var(--ui-surface);
  display: grid; place-content: center; transition: background-color var(--ui-dur-1), border-color var(--ui-dur-1);
}
.ui-check input[type="radio"] { border-radius: 50%; }
.ui-check input::before { content: ""; inline-size: .7rem; block-size: .7rem; transform: scale(0); transition: transform var(--ui-dur-2) var(--ui-ease-spring); background: var(--ui-on-primary); clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%); }
.ui-check input[type="radio"]::before { clip-path: circle(50%); inline-size: .5rem; block-size: .5rem; }
.ui-check input:checked { background: var(--ui-primary); border-color: var(--ui-primary); }
.ui-check input:checked::before { transform: scale(1); }
.ui-check input:focus-visible { outline: 2px solid var(--ui-focus); outline-offset: 2px; }

.ui-switch { display: inline-flex; align-items: center; gap: var(--ui-space-3); cursor: pointer; min-block-size: var(--ui-tap); }
.ui-switch input {
  appearance: none; margin: 0; flex: none; position: relative; inline-size: 2.75rem; block-size: 1.625rem;
  border-radius: var(--ui-radius-pill); background: var(--ui-surface-3); transition: background-color var(--ui-dur-2);
}
.ui-switch input::after {
  content: ""; position: absolute; inset-block-start: 3px; inset-inline-start: 3px; inline-size: 1.25rem; block-size: 1.25rem;
  border-radius: 50%; background: #fff; box-shadow: var(--ui-shadow-1); transition: transform var(--ui-dur-2) var(--ui-ease-out);
}
.ui-switch input:checked { background: var(--ui-primary); }
.ui-switch input:checked::after { transform: translateX(1.125rem); }
[dir="rtl"] .ui-switch input:checked::after { transform: translateX(-1.125rem); }
.ui-switch input:focus-visible { outline: 2px solid var(--ui-focus); outline-offset: 2px; }

/* choice chips (checkbox/radio based, work without JS) */
.ui-chips { display: flex; flex-wrap: wrap; gap: var(--ui-space-2); }
.ui-chip { position: relative; display: inline-flex; }
.ui-chip input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.ui-chip > span, a.ui-chip, button.ui-chip {
  display: inline-flex; align-items: center; gap: .4rem; min-block-size: 2.5rem; padding: .45rem 1rem;
  border-radius: var(--ui-radius-pill); border: 1px solid var(--ui-line-strong); background: var(--ui-surface);
  color: var(--ui-ink); font-size: var(--ui-text-sm); text-decoration: none; line-height: 1.2;
  transition: background-color var(--ui-dur-1), border-color var(--ui-dur-1), color var(--ui-dur-1);
}
.ui-chip input:checked + span, a.ui-chip[aria-current], button.ui-chip[aria-pressed="true"] { background: var(--ui-ink); border-color: var(--ui-ink); color: var(--ui-bg); }
.ui-chip input:focus-visible + span { outline: 2px solid var(--ui-focus); outline-offset: 2px; }
.ui-chip input:disabled + span { opacity: .45; }

/* ===================================================================== combobox (combobox.js) */
.ui-cbx { position: relative; }
.ui-cbx-box {
  display: flex; flex-wrap: wrap; align-items: center; gap: .35rem;
  min-block-size: var(--ui-control-h); padding: .3rem 2.5rem .3rem .4rem;
  border: 1px solid var(--ui-line-strong); border-radius: var(--ui-radius-sm); background: var(--ui-surface);
  cursor: text; transition: border-color var(--ui-dur-2), box-shadow var(--ui-dur-2);
}
[dir="rtl"] .ui-cbx-box { padding: .3rem .4rem .3rem 2.5rem; }
.ui-cbx.open .ui-cbx-box, .ui-cbx-box:focus-within { border-color: var(--ui-primary); box-shadow: 0 0 0 3px color-mix(in oklab, var(--ui-primary) 22%, transparent); }
.ui-cbx.invalid .ui-cbx-box { border-color: var(--ui-bad); }
.ui-cbx-chips { display: contents; list-style: none; margin: 0; padding: 0; }
.ui-cbx-chip { display: inline-flex; align-items: center; gap: .2rem; padding: .2rem .25rem .2rem .7rem; border-radius: var(--ui-radius-pill); background: var(--ui-primary-soft); color: var(--ui-ink); font-size: var(--ui-text-sm); animation: ui-pop var(--ui-dur-2) var(--ui-ease-spring); }
.ui-cbx-chip button { border: 0; background: transparent; inline-size: 1.6rem; block-size: 1.6rem; border-radius: 50%; display: grid; place-items: center; color: var(--ui-ink-2); }
.ui-cbx-chip button:hover { background: var(--ui-hover); color: var(--ui-ink); }
.ui-cbx-input { flex: 1 1 6rem; min-inline-size: 4rem; border: 0; outline: 0; background: transparent; padding: .45rem .5rem; font-size: max(16px, var(--ui-text-md)); }
.ui-cbx.full .ui-cbx-input { flex-basis: 2rem; }
.ui-cbx-toggle { position: absolute; inset-inline-end: .35rem; inset-block-start: 50%; transform: translateY(-50%); inline-size: 2rem; block-size: 2rem; border: 0; background: transparent; border-radius: 50%; color: var(--ui-ink-2); }
.ui-cbx-toggle::before { content: ""; display: block; margin: auto; inline-size: .5rem; block-size: .5rem; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-25%) rotate(45deg); transition: transform var(--ui-dur-2); }
.ui-cbx.open .ui-cbx-toggle::before { transform: translateY(15%) rotate(225deg); }
.ui-cbx-list {
  position: absolute; z-index: var(--ui-z-dropdown); inset-inline: 0; inset-block-start: calc(100% + .35rem);
  max-block-size: min(19rem, 50vh); overflow: auto; overscroll-behavior: contain; margin: 0; padding: .35rem; list-style: none;
  background: var(--ui-surface); border: 1px solid var(--ui-line); border-radius: var(--ui-radius-sm); box-shadow: var(--ui-shadow-3);
  animation: ui-drop var(--ui-dur-2) var(--ui-ease-out);
}
.ui-cbx-list [role="option"] { display: flex; align-items: center; justify-content: space-between; gap: var(--ui-space-2); padding: .6rem .75rem; border-radius: calc(var(--ui-radius-sm) - .2rem); cursor: pointer; min-block-size: var(--ui-tap); }
.ui-cbx-list [role="option"].active { background: var(--ui-hover); }
.ui-cbx-list [role="option"][aria-selected="true"] { font-weight: var(--ui-weight-strong); }
.ui-cbx-list [role="option"][aria-selected="true"]::after { content: ""; inline-size: .35rem; block-size: .7rem; border-right: 2px solid var(--ui-primary); border-bottom: 2px solid var(--ui-primary); transform: rotate(45deg); }
.ui-cbx-list mark { background: none; color: var(--ui-primary); font-weight: var(--ui-weight-strong); }
.ui-cbx-empty { padding: .75rem; color: var(--ui-ink-3); font-size: var(--ui-text-sm); }
.ui-cbx.shake .ui-cbx-box { animation: ui-shake .35s; }

/* ===================================================================== language picker */
.ui-lang { position: relative; display: inline-block; }
.ui-lang > summary {
  list-style: none; display: inline-flex; align-items: center; gap: .45rem; min-block-size: var(--ui-control-h-sm);
  padding: 0 .8rem; border-radius: var(--ui-radius-pill); border: 1px solid var(--ui-line); background: var(--ui-surface);
  font-size: var(--ui-text-sm); font-weight: var(--ui-weight-strong); cursor: pointer; user-select: none;
}
.ui-lang > summary::-webkit-details-marker { display: none; }
.ui-lang > summary:hover { background: color-mix(in oklab, var(--ui-surface) 92%, var(--ui-ink)); }
.ui-lang-chev { inline-size: .4rem; block-size: .4rem; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: translateY(-20%) rotate(45deg); transition: transform var(--ui-dur-2); }
.ui-lang[open] .ui-lang-chev { transform: translateY(15%) rotate(225deg); }
.ui-lang-panel {
  position: absolute; z-index: var(--ui-z-dropdown); inset-inline-end: 0; inset-block-start: calc(100% + .4rem);
  inline-size: min(18rem, calc(100vw - 2rem)); padding: .4rem;
  background: var(--ui-surface); border: 1px solid var(--ui-line); border-radius: var(--ui-radius); box-shadow: var(--ui-shadow-3);
  animation: ui-drop var(--ui-dur-2) var(--ui-ease-out);
}
.ui-lang.up .ui-lang-panel { inset-block-start: auto; inset-block-end: calc(100% + .4rem); }
.ui-lang.start .ui-lang-panel { inset-inline-end: auto; inset-inline-start: 0; }
.ui-lang-search { inline-size: 100%; min-block-size: 2.5rem; padding: .5rem .75rem; margin-block-end: .3rem; border: 1px solid var(--ui-line); border-radius: var(--ui-radius-sm); background: var(--ui-surface-2); font-size: max(16px, var(--ui-text-sm)); }
.ui-lang-search:focus { outline: none; border-color: var(--ui-primary); }
.ui-lang-list { list-style: none; margin: 0; padding: 0; max-block-size: min(20rem, 55vh); overflow: auto; overscroll-behavior: contain; }
.ui-lang-list a {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .7rem; border-radius: calc(var(--ui-radius) - .4rem); text-decoration: none; min-block-size: var(--ui-tap);
}
.ui-lang-list a:hover, .ui-lang-list a.active, .ui-lang-list a:focus-visible { background: var(--ui-hover); outline: none; }
.ui-lang-list a[aria-current] { font-weight: var(--ui-weight-strong); }
.ui-lang-list a[aria-current]::after { content: ""; inline-size: .35rem; block-size: .7rem; border-right: 2px solid var(--ui-primary); border-bottom: 2px solid var(--ui-primary); transform: rotate(45deg); }
.ui-lang-name { flex: 1; min-inline-size: 0; }
.ui-lang-name small { display: block; font-weight: 400; color: var(--ui-ink-3); font-size: var(--ui-text-xs); }
.ui-lang-flag { font-size: 1.15rem; line-height: 1; inline-size: 1.4rem; text-align: center; }
.ui-lang-code { font-size: var(--ui-text-xs); color: var(--ui-ink-3); text-transform: uppercase; }
.ui-lang-empty { padding: .75rem; color: var(--ui-ink-3); font-size: var(--ui-text-sm); }
.ui-lang-short { display: none; font-size: var(--ui-text-xs); letter-spacing: .04em; }
@media (max-width: 40rem) {
  /* the panel spans the header / footer row instead of hanging off a small button */
  .ui-header .ui-lang, .ui-footer-prefs .ui-lang { position: static; }
  .ui-footer-prefs { position: relative; }
  .ui-header .ui-lang-panel, .ui-footer-prefs .ui-lang-panel { inset-inline: var(--ui-gutter); inline-size: auto; }
  .ui-footer-prefs .ui-lang-panel { inset-inline: 0; }
}
@media (max-width: 30rem) {
  .ui-header .ui-lang-current { display: none; }
  .ui-header .ui-lang-short { display: inline; }
  .ui-header .ui-theme-switch { display: none; }
}

/* ===================================================================== theme switch */
.ui-theme-switch { display: inline-flex; padding: 3px; gap: 2px; border-radius: var(--ui-radius-pill); background: var(--ui-surface-2); border: 1px solid var(--ui-line); margin: 0; }
.ui-theme-switch button {
  display: grid; place-items: center; inline-size: 2.25rem; block-size: 2rem; border: 0; border-radius: var(--ui-radius-pill);
  background: transparent; color: var(--ui-ink-2); transition: background-color var(--ui-dur-2), color var(--ui-dur-2);
}
.ui-theme-switch button:hover { color: var(--ui-ink); }
.ui-theme-switch button[aria-pressed="true"] { background: var(--ui-surface); color: var(--ui-ink); box-shadow: var(--ui-shadow-1); }

/* ===================================================================== header / footer */
.ui-header {
  position: sticky; inset-block-start: 0; z-index: var(--ui-z-header);
  padding-block-start: var(--ui-safe-top);
  background: color-mix(in oklab, var(--ui-bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-block-end: 1px solid transparent; transition: border-color var(--ui-dur-2), box-shadow var(--ui-dur-2);
}
.ui-header.scrolled { border-block-end-color: var(--ui-line); }
.ui-header-inner { display: flex; align-items: center; gap: var(--ui-space-4); min-block-size: var(--ui-header-h); }
.ui-brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; font-family: var(--ui-font-display); font-weight: var(--ui-weight-display); font-size: var(--ui-text-xl); letter-spacing: var(--ui-tracking-display); }
.ui-brand img, .ui-brand svg { block-size: 1.75rem; inline-size: auto; }
.ui-nav { display: flex; align-items: center; gap: .25rem; }
.ui-nav a { padding: .45rem .8rem; border-radius: var(--ui-radius-pill); text-decoration: none; color: var(--ui-ink-2); font-weight: var(--ui-weight-strong); font-size: var(--ui-text-sm); }
.ui-nav a:hover { color: var(--ui-ink); background: var(--ui-hover); }
.ui-nav a[aria-current="page"] { color: var(--ui-ink); background: var(--ui-surface-2); }
.ui-header-actions { display: flex; align-items: center; gap: var(--ui-space-2); margin-inline-start: auto; }
@media (max-width: 47.99rem) { .ui-header .ui-nav.ui-hide-sm, .ui-hide-sm { display: none; } }
@media (min-width: 48rem) { .ui-hide-lg { display: none; } }

.ui-footer { margin-block-start: var(--ui-space-16); padding-block: var(--ui-space-10) calc(var(--ui-space-10) + var(--ui-safe-bottom)); border-block-start: 1px solid var(--ui-line); color: var(--ui-ink-2); font-size: var(--ui-text-sm); }
.ui-footer-inner { display: grid; gap: var(--ui-space-6); }
.ui-footer nav { display: flex; flex-wrap: wrap; gap: var(--ui-space-2) var(--ui-space-5); }
.ui-footer a { text-decoration: none; }
.ui-footer a:hover { color: var(--ui-ink); text-decoration: underline; }
.ui-footer-prefs { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ui-space-3); }
@media (min-width: 48rem) { .ui-footer-inner { grid-template-columns: 1fr auto; align-items: center; } }

/* notification bell */
.ui-bell { position: relative; }
.ui-badge {
  position: absolute; inset-block-start: .2rem; inset-inline-end: .15rem; min-inline-size: 1.1rem; block-size: 1.1rem; padding: 0 .3rem;
  border-radius: var(--ui-radius-pill); background: var(--ui-bad); color: #fff; font-size: .68rem; font-weight: 700; line-height: 1.1rem; text-align: center;
  box-shadow: 0 0 0 2px var(--ui-bg); font-variant-numeric: tabular-nums;
}
.ui-badge:empty { display: none; }
.ui-badge.bump { animation: ui-pop var(--ui-dur-3) var(--ui-ease-spring); }
.ui-pill { display: inline-flex; align-items: center; gap: .3rem; padding: .15rem .6rem; border-radius: var(--ui-radius-pill); background: var(--ui-surface-2); font-size: var(--ui-text-xs); font-weight: var(--ui-weight-strong); color: var(--ui-ink-2); }
.ui-pill-primary { background: var(--ui-primary-soft); color: var(--ui-primary); }

/* ===================================================================== cards, avatars, empty */
.ui-card { background: var(--ui-surface); border: 1px solid var(--ui-line); border-radius: var(--ui-radius-lg); padding: var(--ui-space-5); }
.ui-card-raised { border-color: transparent; box-shadow: var(--ui-shadow-2); }
a.ui-card { display: block; text-decoration: none; transition: transform var(--ui-dur-2) var(--ui-ease-out), box-shadow var(--ui-dur-2); }
a.ui-card:hover { transform: translateY(-2px); box-shadow: var(--ui-shadow-3); }
.ui-media-card { padding: 0; overflow: hidden; }
.ui-media-card > .ui-img { border-radius: 0; }
.ui-media-card .ui-card-body { padding: var(--ui-space-4); display: grid; gap: var(--ui-space-1); }
.ui-avatar { display: inline-grid; place-items: center; flex: none; inline-size: var(--ui-avatar, 2.5rem); block-size: var(--ui-avatar, 2.5rem); border-radius: 50%; overflow: hidden; background: var(--ui-surface-3); color: var(--ui-ink-2); font-weight: var(--ui-weight-strong); font-size: calc(var(--ui-avatar, 2.5rem) * .4); }
.ui-avatar img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.ui-avatar-sm { --ui-avatar: 2rem; }
.ui-avatar-lg { --ui-avatar: 4rem; }
.ui-empty { display: grid; justify-items: center; text-align: center; gap: var(--ui-space-3); padding: var(--ui-space-12) var(--ui-space-6); color: var(--ui-ink-2); }
.ui-empty-art { inline-size: 4.5rem; block-size: 4.5rem; display: grid; place-items: center; border-radius: 50%; background: var(--ui-surface-2); color: var(--ui-ink-3); }
.ui-empty-art .ui-i { inline-size: 2rem; block-size: 2rem; }
.ui-empty h2, .ui-empty h3 { font-size: var(--ui-text-xl); color: var(--ui-ink); }
.ui-empty p { max-inline-size: 42ch; }
.ui-divider { border: 0; block-size: 1px; background: var(--ui-line); margin-block: var(--ui-space-6); }

/* ===================================================================== alerts / flash / toasts */
.ui-alert { display: flex; gap: var(--ui-space-3); align-items: flex-start; padding: var(--ui-space-3) var(--ui-space-4); border-radius: var(--ui-radius); background: var(--ui-surface-2); border: 1px solid var(--ui-line); }
.ui-alert-good { background: var(--ui-good-soft); border-color: color-mix(in oklab, var(--ui-good) 30%, transparent); }
.ui-alert-bad { background: var(--ui-bad-soft); border-color: color-mix(in oklab, var(--ui-bad) 30%, transparent); }
.ui-alert-info { background: var(--ui-primary-soft); border-color: color-mix(in oklab, var(--ui-primary) 25%, transparent); }

.ui-toasts {
  position: fixed; z-index: var(--ui-z-toast); inset-inline: 0; inset-block-end: calc(var(--ui-space-4) + var(--ui-safe-bottom) + var(--ui-toast-offset, 0px));
  display: flex; flex-direction: column; align-items: center; gap: var(--ui-space-2); pointer-events: none; padding-inline: var(--ui-space-4);
}
.ui-toast {
  pointer-events: auto; display: flex; align-items: center; gap: var(--ui-space-3);
  max-inline-size: min(32rem, 100%); padding: .75rem .9rem .75rem 1.1rem; border-radius: var(--ui-radius);
  background: var(--ui-ink); color: var(--ui-bg); box-shadow: var(--ui-shadow-3); font-size: var(--ui-text-sm);
  animation: ui-toast-in var(--ui-dur-3) var(--ui-ease-spring);
}
.ui-toast.out { animation: ui-toast-out var(--ui-dur-2) var(--ui-ease-in-out) forwards; }
.ui-toast-bad { background: var(--ui-bad); color: #fff; }
.ui-toast-good .ui-toast-dot { background: var(--ui-good); }
.ui-toast-dot { inline-size: .5rem; block-size: .5rem; border-radius: 50%; background: var(--ui-primary); flex: none; }
.ui-toast-bad .ui-toast-dot { background: #fff; }
.ui-toast a, .ui-toast button.ui-toast-action { color: inherit; font-weight: 700; background: none; border: 0; padding: .25rem .4rem; border-radius: var(--ui-radius-sm); text-decoration: underline; text-underline-offset: .2em; white-space: nowrap; }
.ui-toast-close { border: 0; background: transparent; color: inherit; opacity: .7; inline-size: 1.75rem; block-size: 1.75rem; border-radius: 50%; display: grid; place-items: center; }
.ui-toast-close:hover { opacity: 1; background: color-mix(in oklab, currentColor 15%, transparent); }
@keyframes ui-toast-in { from { opacity: 0; transform: translateY(12px) scale(.96); } }
@keyframes ui-toast-out { to { opacity: 0; transform: translateY(8px) scale(.97); } }

/* ===================================================================== dialog / sheet */
dialog.ui-dialog {
  border: 0; padding: 0; color: var(--ui-ink); background: var(--ui-surface);
  inline-size: min(34rem, calc(100vw - 2rem)); max-block-size: min(46rem, calc(100dvh - 2rem));
  border-radius: var(--ui-radius-xl); box-shadow: var(--ui-shadow-4); overflow: hidden;
}
dialog.ui-dialog[open] { display: flex; flex-direction: column; animation: ui-dialog-in var(--ui-dur-3) var(--ui-ease-out); }
dialog.ui-dialog::backdrop { background: var(--ui-scrim); backdrop-filter: blur(2px); animation: ui-fade var(--ui-dur-3) var(--ui-ease-out); }
dialog.ui-dialog.closing { animation: ui-dialog-out var(--ui-dur-2) var(--ui-ease-in-out) forwards; }
dialog.ui-dialog.closing::backdrop { animation: ui-fade var(--ui-dur-2) reverse forwards; }
.ui-dialog-head { display: flex; align-items: center; gap: var(--ui-space-3); padding: var(--ui-space-4) var(--ui-space-4) var(--ui-space-2) var(--ui-space-6); }
.ui-dialog-head h2 { font-size: var(--ui-text-xl); flex: 1; }
.ui-dialog-body { padding: var(--ui-space-2) var(--ui-space-6) var(--ui-space-6); overflow: auto; overscroll-behavior: contain; }
.ui-dialog-foot { display: flex; gap: var(--ui-space-2); justify-content: flex-end; padding: var(--ui-space-4) var(--ui-space-6) calc(var(--ui-space-4) + var(--ui-safe-bottom)); border-block-start: 1px solid var(--ui-line); }
.ui-sheet-grip { display: none; }
@keyframes ui-dialog-in { from { opacity: 0; transform: translateY(10px) scale(.97); } }
@keyframes ui-dialog-out { to { opacity: 0; transform: translateY(6px) scale(.98); } }
@keyframes ui-fade { from { opacity: 0; } }

/* .ui-sheet: a bottom sheet on phones, a centred dialog from 40rem */
@media (max-width: 39.99rem) {
  dialog.ui-dialog.ui-sheet {
    inline-size: 100%; max-inline-size: 100%; margin: auto 0 0; max-block-size: 92dvh;
    border-end-start-radius: 0; border-end-end-radius: 0;
  }
  dialog.ui-dialog.ui-sheet[open] { animation: ui-sheet-in var(--ui-dur-3) var(--ui-ease-out); }
  dialog.ui-dialog.ui-sheet.closing { animation: ui-sheet-out var(--ui-dur-2) var(--ui-ease-in-out) forwards; }
  .ui-sheet .ui-sheet-grip { display: block; inline-size: 2.5rem; block-size: .3rem; border-radius: 99px; background: var(--ui-line-strong); margin: .6rem auto 0; flex: none; touch-action: none; }
  .ui-sheet .ui-dialog-head { touch-action: none; padding-inline-start: var(--ui-space-5); }
  .ui-sheet .ui-dialog-body { padding-inline: var(--ui-space-5); padding-block-end: calc(var(--ui-space-6) + var(--ui-safe-bottom)); }
}
@keyframes ui-sheet-in { from { transform: translateY(100%); } }
@keyframes ui-sheet-out { to { transform: translateY(100%); } }
html.ui-scroll-locked { overflow: hidden; }

/* menu list inside sheets (share targets, lists) */
.ui-menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.ui-menu > li > a, .ui-menu > li > button, .ui-menu > li > label {
  display: flex; align-items: center; gap: var(--ui-space-3); inline-size: 100%; min-block-size: 3rem; padding: .6rem .75rem;
  border: 0; border-radius: var(--ui-radius-sm); background: transparent; text-align: start; text-decoration: none; font-size: var(--ui-text-md);
}
.ui-menu > li > :is(a, button, label):hover { background: var(--ui-hover); }

/* ===================================================================== tabs */
.ui-tabs [role="tablist"] { display: flex; gap: var(--ui-space-1); overflow-x: auto; scrollbar-width: none; border-block-end: 1px solid var(--ui-line); position: relative; }
.ui-tabs [role="tablist"]::-webkit-scrollbar { display: none; }
.ui-tabs [role="tab"] {
  position: relative; flex: none; padding: .75rem 1rem; border: 0; background: transparent; color: var(--ui-ink-2);
  font-weight: var(--ui-weight-strong); font-size: var(--ui-text-sm); white-space: nowrap; text-decoration: none; border-radius: var(--ui-radius-sm) var(--ui-radius-sm) 0 0;
}
.ui-tabs [role="tab"]:hover { color: var(--ui-ink); background: var(--ui-hover); }
.ui-tabs [role="tab"][aria-selected="true"] { color: var(--ui-ink); }
.ui-tabs [role="tab"][aria-selected="true"]::after { content: ""; position: absolute; inset-inline: .75rem; inset-block-end: -1px; block-size: 2px; border-radius: 2px; background: var(--ui-primary); animation: ui-grow-x var(--ui-dur-2) var(--ui-ease-out); }
.ui-tabs [role="tabpanel"] { padding-block: var(--ui-space-5); }
.ui-tabs [role="tabpanel"]:focus-visible { outline-offset: -2px; }
.ui-tabs-pills [role="tablist"] { border: 0; gap: var(--ui-space-2); }
.ui-tabs-pills [role="tab"] { border-radius: var(--ui-radius-pill); background: var(--ui-surface-2); }
.ui-tabs-pills [role="tab"][aria-selected="true"] { background: var(--ui-ink); color: var(--ui-bg); }
.ui-tabs-pills [role="tab"][aria-selected="true"]::after { display: none; }
@keyframes ui-grow-x { from { transform: scaleX(.3); opacity: 0; } }

/* ===================================================================== skeletons */
.ui-skeleton {
  display: block; border-radius: var(--ui-radius-sm); background: var(--ui-skeleton);
  background-image: linear-gradient(90deg, transparent 0, var(--ui-skeleton-shine) 50%, transparent 100%);
  background-size: 200% 100%; background-repeat: no-repeat; animation: ui-shimmer 1.4s ease-in-out infinite;
  min-block-size: 1em; color: transparent !important; user-select: none;
}
.ui-skeleton-text { block-size: .9em; margin-block: .35em; }
.ui-skeleton-text:last-child { inline-size: 62%; }
.ui-skeleton-circle { border-radius: 50%; aspect-ratio: 1; }
.ui-skeleton-media { aspect-ratio: var(--ui-ratio, 4 / 3); border-radius: var(--ui-radius); }
@keyframes ui-shimmer { from { background-position: 150% 0; } to { background-position: -50% 0; } }
@media (prefers-reduced-motion: reduce) { .ui-skeleton { animation: none; } }

/* ===================================================================== images and media */
.ui-img { position: relative; overflow: hidden; border-radius: var(--ui-radius); background: var(--ui-skeleton); aspect-ratio: var(--ui-ratio, auto); isolation: isolate; }
.ui-img.r-1x1 { --ui-ratio: 1; } .ui-img.r-4x3 { --ui-ratio: 4 / 3; } .ui-img.r-3x2 { --ui-ratio: 3 / 2; }
.ui-img.r-16x9 { --ui-ratio: 16 / 9; } .ui-img.r-9x16 { --ui-ratio: 9 / 16; } .ui-img.r-4x5 { --ui-ratio: 4 / 5; }
.ui-img > img, .ui-img > video, .ui-img > picture > img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.ui-img[data-placeholder]::before {
  content: ""; position: absolute; inset: -12px; z-index: -1; background-image: var(--ui-ph); background-size: cover; background-position: center;
  filter: blur(14px) saturate(1.2); transform: scale(1.05); transition: opacity var(--ui-dur-4) var(--ui-ease-out);
}
.ui-img > img.ui-fade { opacity: 0; transition: opacity var(--ui-dur-4) var(--ui-ease-out); }
.ui-img.loaded > img.ui-fade { opacity: 1; }
.ui-img.loaded::before { opacity: 0; }
.ui-img.failed { display: grid; place-items: center; color: var(--ui-ink-3); }
.ui-play-badge { position: absolute; inset-block-start: var(--ui-space-2); inset-inline-end: var(--ui-space-2); display: grid; place-items: center; inline-size: 2rem; block-size: 2rem; border-radius: 50%; background: rgb(0 0 0 / .5); color: #fff; }

/* ===================================================================== feed (feed.js) */
.ui-feed {
  block-size: var(--ui-feed-h, 100dvh); overflow-y: auto; overscroll-behavior-y: contain; scroll-snap-type: y mandatory;
  scrollbar-width: none; background: #000; color: #fff; position: relative; outline: none;
}
.ui-feed::-webkit-scrollbar { display: none; }
.ui-feed-item { position: relative; block-size: var(--ui-feed-h, 100dvh); scroll-snap-align: start; scroll-snap-stop: always; overflow: hidden; contain: strict; }
.ui-feed-item > .ui-feed-media, .ui-feed-item > .ui-feed-media > :is(img, video) { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; object-fit: cover; }
.ui-feed-item > .ui-feed-media.contain > :is(img, video) { object-fit: contain; }
.ui-feed-item::after { content: ""; position: absolute; inset: 45% 0 0; background: linear-gradient(to top, rgb(0 0 0 / .72), transparent); pointer-events: none; }
/* logical padding: the rail sits at inline-end in both directions, so the text keeps clear of it */
.ui-feed-overlay { position: absolute; z-index: 1; inset-inline: 0; inset-block-end: 0; padding-block: var(--ui-space-5) calc(var(--ui-space-6) + var(--ui-safe-bottom)); padding-inline: var(--ui-space-5) calc(var(--ui-space-5) + 4rem); display: grid; gap: var(--ui-space-2); text-shadow: 0 1px 8px rgb(0 0 0 / .4); }
.ui-feed-overlay a { color: #fff; }
.ui-feed-rail { position: absolute; z-index: 2; inset-inline-end: var(--ui-space-3); inset-block-end: calc(var(--ui-space-8) + var(--ui-safe-bottom)); display: grid; gap: var(--ui-space-4); justify-items: center; }
.ui-feed-rail .ui-btn { --b-bg: rgb(255 255 255 / .14); --b-ink: #fff; --b-line: transparent; backdrop-filter: blur(8px); }
.ui-feed-rail .ui-btn[aria-pressed="true"] { --b-bg: #fff; --b-ink: var(--ui-bad); }
.ui-feed-rail small { display: block; text-align: center; font-size: var(--ui-text-xs); font-weight: 700; margin-block-start: .2rem; text-shadow: 0 1px 4px rgb(0 0 0 / .5); }
.ui-feed-sound { position: absolute; z-index: 2; inset-block-start: calc(var(--ui-space-4) + var(--ui-safe-top)); inset-inline-end: var(--ui-space-4); }
.ui-feed-progress { position: absolute; z-index: 2; inset-inline: 0; inset-block-end: 0; block-size: 2px; background: rgb(255 255 255 / .2); }
.ui-feed-progress > i { display: block; block-size: 100%; inline-size: 100%; background: #fff; transform-origin: left; transform: scaleX(var(--p, 0)); }
[dir="rtl"] .ui-feed-progress > i { transform-origin: right; }
.ui-feed-end { block-size: 30vh; display: grid; place-items: center; scroll-snap-align: end; color: rgb(255 255 255 / .7); }
.ui-feed-hint { position: absolute; z-index: 3; inset-block-end: 22%; inset-inline: 0; margin: auto; inline-size: max-content; padding: .5rem 1rem; border-radius: var(--ui-radius-pill); background: rgb(0 0 0 / .45); font-size: var(--ui-text-sm); animation: ui-hint 2.4s var(--ui-ease-in-out) 2 forwards; pointer-events: none; }
@keyframes ui-hint { 0%, 100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(-14px); } 95% { opacity: 1; } 100% { opacity: 0; } }
.ui-feed-tap { position: absolute; z-index: 3; inset: 0; margin: auto; inline-size: 5rem; block-size: 5rem; display: grid; place-items: center; border-radius: 50%; background: rgb(0 0 0 / .4); animation: ui-tap .6s var(--ui-ease-out) forwards; pointer-events: none; }
@keyframes ui-tap { from { transform: scale(.6); opacity: 1; } to { transform: scale(1.25); opacity: 0; } }
.ui-heart-burst { position: absolute; z-index: 3; inline-size: 6rem; block-size: 6rem; margin: -3rem 0 0 -3rem; color: #fff; pointer-events: none; animation: ui-burst .8s var(--ui-ease-out) forwards; filter: drop-shadow(0 4px 16px rgb(0 0 0 / .35)); }
.ui-heart-burst svg { inline-size: 100%; block-size: 100%; fill: var(--ui-bad); stroke: none; }
@keyframes ui-burst { 0% { transform: scale(.4); opacity: 0; } 20% { transform: scale(1.15); opacity: 1; } 70% { transform: scale(1); opacity: 1; } 100% { transform: scale(1.1) translateY(-30px); opacity: 0; } }

/* ===================================================================== carousel */
.ui-carousel { position: relative; }
.ui-carousel-track {
  display: grid; grid-auto-flow: column; grid-auto-columns: var(--ui-slide, 80%); gap: var(--ui-space-3);
  overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x mandatory; scroll-padding-inline: var(--ui-gutter);
  padding-inline: var(--ui-gutter); padding-block: var(--ui-space-1); scrollbar-width: none; list-style: none; margin: 0;
}
.ui-carousel-track::-webkit-scrollbar { display: none; }
.ui-carousel-track > * { scroll-snap-align: start; min-inline-size: 0; }
@media (min-width: 40rem) { .ui-carousel-track { grid-auto-columns: var(--ui-slide-md, 45%); } }
@media (min-width: 64rem) { .ui-carousel-track { grid-auto-columns: var(--ui-slide-lg, 30%); } }
.ui-carousel-btn { position: absolute; inset-block-start: 50%; transform: translateY(-50%); z-index: 1; box-shadow: var(--ui-shadow-2); }
.ui-carousel-btn[data-dir="prev"] { inset-inline-start: var(--ui-space-2); }
.ui-carousel-btn[data-dir="next"] { inset-inline-end: var(--ui-space-2); }
.ui-carousel-btn:disabled { opacity: 0; }
@media (hover: none) { .ui-carousel-btn { display: none; } }
.ui-carousel-dots { display: flex; justify-content: center; gap: .4rem; padding-block-start: var(--ui-space-3); }
.ui-carousel-dots button { inline-size: .5rem; block-size: .5rem; padding: 0; border: 0; border-radius: 99px; background: var(--ui-line-strong); transition: inline-size var(--ui-dur-2) var(--ui-ease-out), background-color var(--ui-dur-2); }
.ui-carousel-dots button[aria-current="true"] { inline-size: 1.4rem; background: var(--ui-ink); }

/* ===================================================================== stars */
.ui-stars { display: inline-flex; align-items: center; gap: .1rem; color: var(--ui-star); vertical-align: middle; }
.ui-stars .ui-i { inline-size: 1em; block-size: 1em; stroke: none; fill: currentColor; }
.ui-stars .empty { fill: color-mix(in oklab, var(--ui-ink) 16%, transparent); }
.ui-stars-value { margin-inline-start: .35rem; color: var(--ui-ink); font-weight: var(--ui-weight-strong); font-size: .95em; font-variant-numeric: tabular-nums; }
.ui-stars-count { margin-inline-start: .25rem; color: var(--ui-ink-3); font-size: .9em; }

/* rating input: radios in reverse order so CSS can fill "this and below" without JS */
.ui-rate { display: inline-flex; flex-direction: row-reverse; justify-content: flex-end; gap: .15rem; border: 0; margin: 0; padding: 0; }
.ui-rate input { position: absolute; opacity: 0; inline-size: 1px; block-size: 1px; }
.ui-rate label { cursor: pointer; padding: .2rem; color: color-mix(in oklab, var(--ui-ink) 18%, transparent); transition: color var(--ui-dur-1), transform var(--ui-dur-2) var(--ui-ease-spring); }
.ui-rate label .ui-i { inline-size: 2rem; block-size: 2rem; stroke: none; fill: currentColor; }
.ui-rate input:checked ~ label, .ui-rate label:hover, .ui-rate label:hover ~ label { color: var(--ui-star); }
.ui-rate:hover input:checked ~ label:not(:hover):not(:hover ~ label) { color: color-mix(in oklab, var(--ui-star) 45%, transparent); }
.ui-rate input:focus-visible + label { outline: 2px solid var(--ui-focus); border-radius: .4rem; }
.ui-rate label:active { transform: scale(.85); }
.ui-rate input:checked + label { animation: ui-pop var(--ui-dur-3) var(--ui-ease-spring); }

/* ===================================================================== reactions */
.ui-reactions { display: inline-flex; align-items: center; gap: var(--ui-space-1); border-radius: var(--ui-radius-pill); background: var(--ui-surface-2); padding: 2px; }
.ui-reactions .ui-btn { --b-bg: transparent; --b-line: transparent; --b-h: 2.25rem; gap: .35rem; font-variant-numeric: tabular-nums; }
.ui-reactions .ui-btn[aria-pressed="true"] { --b-bg: var(--ui-surface); --b-ink: var(--ui-primary); box-shadow: var(--ui-shadow-1); }
.ui-reactions .ui-btn[aria-pressed="true"] .ui-i { fill: currentColor; animation: ui-pop var(--ui-dur-3) var(--ui-ease-spring); }
.ui-reactions-sep { inline-size: 1px; block-size: 1.2rem; background: var(--ui-line-strong); }
@keyframes ui-pop { 0% { transform: scale(.6); } 60% { transform: scale(1.15); } 100% { transform: scale(1); } }
@keyframes ui-drop { from { opacity: 0; transform: translateY(-4px); } }
@keyframes ui-shake { 20%, 60% { transform: translateX(-4px); } 40%, 80% { transform: translateX(4px); } }

/* ===================================================================== share / save-to-list */
.ui-share-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(4.5rem, 1fr)); gap: var(--ui-space-3); }
.ui-share-grid a, .ui-share-grid button { display: grid; justify-items: center; gap: .4rem; padding: .5rem .25rem; border: 0; background: transparent; border-radius: var(--ui-radius); text-decoration: none; font-size: var(--ui-text-xs); color: var(--ui-ink-2); }
.ui-share-grid a:hover, .ui-share-grid button:hover { background: var(--ui-hover); color: var(--ui-ink); }
.ui-share-grid .ui-share-ico { inline-size: 3rem; block-size: 3rem; display: grid; place-items: center; border-radius: 50%; background: var(--ui-surface-2); color: var(--ui-ink); font-weight: 700; }
.ui-share-link { display: flex; gap: var(--ui-space-2); margin-block-start: var(--ui-space-4); }
.ui-share-link input { flex: 1; min-inline-size: 0; }
.ui-lists { display: grid; gap: 2px; }
.ui-list-row { display: flex; align-items: center; gap: var(--ui-space-3); min-block-size: 3.25rem; padding: .5rem .6rem; border-radius: var(--ui-radius-sm); cursor: pointer; }
.ui-list-row:hover { background: var(--ui-hover); }
.ui-list-row .ui-list-name { flex: 1; min-inline-size: 0; }
.ui-list-row .ui-list-name small { display: block; color: var(--ui-ink-3); font-size: var(--ui-text-xs); }
.ui-list-new { display: flex; gap: var(--ui-space-2); margin-block-start: var(--ui-space-3); }

/* ===================================================================== comments */
.ui-comments { display: grid; gap: var(--ui-space-5); }
.ui-comment-form { display: grid; gap: var(--ui-space-2); }
.ui-comment-form .ui-textarea { min-block-size: 3.25rem; }
.ui-comment-form-actions { display: flex; justify-content: flex-end; gap: var(--ui-space-2); }
.ui-comment-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--ui-space-5); }
.ui-comment { display: grid; grid-template-columns: auto 1fr; gap: var(--ui-space-3); animation: ui-fade var(--ui-dur-3) var(--ui-ease-out); }
.ui-comment-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2rem .5rem; font-size: var(--ui-text-sm); }
.ui-comment-head b { font-weight: var(--ui-weight-strong); }
.ui-comment-head time { color: var(--ui-ink-3); font-size: var(--ui-text-xs); }
.ui-comment-body { white-space: pre-wrap; margin-block: .15rem .35rem; }
.ui-comment-actions { display: flex; gap: var(--ui-space-1); margin-inline-start: -.6rem; }
.ui-comment-actions .ui-btn { --b-h: 2rem; }
.ui-comment-replies { list-style: none; margin: var(--ui-space-3) 0 0; padding: 0 0 0 0; display: grid; gap: var(--ui-space-4); }
.ui-comment.pending { opacity: .6; }
.ui-comment.removed .ui-comment-body { color: var(--ui-ink-3); font-style: italic; }

/* ===================================================================== uploader */
.ui-upload-drop {
  display: grid; justify-items: center; gap: var(--ui-space-2); padding: var(--ui-space-8) var(--ui-space-4); text-align: center;
  border: 1.5px dashed var(--ui-line-strong); border-radius: var(--ui-radius-lg); background: var(--ui-surface); color: var(--ui-ink-2); cursor: pointer;
  transition: border-color var(--ui-dur-2), background-color var(--ui-dur-2);
}
.ui-upload-drop:hover, .ui-upload-drop.over { border-color: var(--ui-primary); background: var(--ui-primary-soft); color: var(--ui-ink); }
.ui-upload-drop input[type="file"] { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; }
.ui-upload-drop:focus-within { outline: 2px solid var(--ui-focus); outline-offset: 2px; }
.ui-upload-grid { list-style: none; margin: var(--ui-space-3) 0 0; padding: 0; display: grid; gap: var(--ui-space-2); grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr)); }
.ui-upload-item { position: relative; aspect-ratio: 1; border-radius: var(--ui-radius); overflow: hidden; background: var(--ui-surface-2); animation: ui-pop var(--ui-dur-3) var(--ui-ease-spring); }
.ui-upload-item > :is(img, video) { inline-size: 100%; block-size: 100%; object-fit: cover; }
.ui-upload-item .ui-upload-bar { position: absolute; inset-inline: .5rem; inset-block-end: .5rem; block-size: .3rem; border-radius: 99px; background: rgb(0 0 0 / .35); overflow: hidden; }
.ui-upload-item .ui-upload-bar > i { display: block; block-size: 100%; inline-size: 100%; background: #fff; transform-origin: left; transform: scaleX(var(--p, 0)); transition: transform var(--ui-dur-2); }
[dir="rtl"] .ui-upload-item .ui-upload-bar > i { transform-origin: right; }
.ui-upload-item.done .ui-upload-bar { display: none; }
.ui-upload-item.failed::after { content: ""; position: absolute; inset: 0; background: color-mix(in oklab, var(--ui-bad) 45%, transparent); }
.ui-upload-item .ui-upload-remove, .ui-upload-item .ui-upload-retry { position: absolute; z-index: 1; inset-block-start: .35rem; inset-inline-end: .35rem; --b-h: 1.9rem; --b-bg: rgb(0 0 0 / .55); --b-ink: #fff; --b-line: transparent; }
.ui-upload-item .ui-upload-retry { inset-inline-end: auto; inset-inline-start: .35rem; }
.ui-upload-item .ui-upload-kind { position: absolute; inset-block-start: .4rem; inset-inline-start: .45rem; color: #fff; filter: drop-shadow(0 1px 3px rgb(0 0 0 / .6)); }
.ui-upload-item.dragging { opacity: .4; }

/* ===================================================================== autosave status */
.ui-autosave { display: inline-flex; align-items: center; gap: .4rem; font-size: var(--ui-text-xs); color: var(--ui-ink-3); min-block-size: 1.5rem; }
.ui-autosave::before { content: ""; inline-size: .45rem; block-size: .45rem; border-radius: 50%; background: currentColor; opacity: 0; transition: opacity var(--ui-dur-2); }
.ui-autosave[data-state="saving"]::before { opacity: 1; background: var(--ui-warn); animation: ui-pulse 1s infinite; }
.ui-autosave[data-state="saved"]::before { opacity: 1; background: var(--ui-good); }
.ui-autosave[data-state="error"] { color: var(--ui-bad); }
.ui-autosave[data-state="error"]::before { opacity: 1; background: var(--ui-bad); }
@keyframes ui-pulse { 50% { opacity: .3; } }

/* infinite list sentinel */
.ui-more { display: grid; place-items: center; padding: var(--ui-space-6); min-block-size: 4rem; }

} /* @layer onelab */