/* MFT Audio Arts — product shell (QA)
   Layout shell is LTR; Persian labels use dir=rtl.
   Sliders always: left=min, right=max (never mirrored).
*/
:root {
  --aa-bg: #0b1220;
  --aa-surface: #121a2b;
  --aa-surface-2: #182338;
  --aa-border: rgba(148, 163, 184, 0.18);
  --aa-text: #e8eefc;
  --aa-muted: #94a3b8;
  --aa-accent: #22d3ee;
  --aa-accent-2: #a78bfa;
  --aa-good: #34d399;
  --aa-warn: #fbbf24;
  --aa-danger: #f87171;
  --aa-radius: 16px;
  --aa-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --aa-font: "Vazirmatn", system-ui, sans-serif;
}

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

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(34, 211, 238, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(167, 139, 250, 0.14), transparent 50%),
    var(--aa-bg);
  color: var(--aa-text);
  font-family: var(--aa-font);
}

/* Force product chrome LTR regardless of document dir */
.aa-body { direction: ltr; text-align: left; }
.aa-rtl { direction: rtl; unicode-bidi: isolate; text-align: right; }
.aa-ltr { direction: ltr; unicode-bidi: isolate; text-align: left; }

.aa-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--aa-border);
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.aa-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}
.aa-brand-ico {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(34,211,238,.25), rgba(167,139,250,.3));
  border: 1px solid var(--aa-border);
  font-size: 1.35rem;
}
.aa-brand strong { display: block; font-size: 1rem; }
.aa-brand small { color: var(--aa-muted); font-size: 0.78rem; }

.aa-nav { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.aa-nav-link {
  color: var(--aa-muted);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.88rem;
}
.aa-nav-link:hover, .aa-nav-link.is-active {
  color: var(--aa-text);
  border-color: var(--aa-border);
  background: rgba(255,255,255,0.04);
}

.aa-top-actions { display: flex; align-items: center; gap: 0.6rem; }

.aa-hero {
  padding: 1.25rem 1.25rem 0.5rem;
  max-width: 1400px;
  margin: 0 auto;
}
.aa-kicker {
  margin: 0 0 0.35rem;
  color: var(--aa-accent);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.aa-hero h1 {
  margin: 0 0 0.4rem;
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  font-weight: 700;
}
.aa-sub { margin: 0; color: var(--aa-muted); max-width: 52ch; line-height: 1.55; }

.aa-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  padding: 0.85rem 1.25rem 0;
  max-width: 1400px;
  margin: 0 auto;
}
.aa-search {
  flex: 1 1 220px;
  min-width: 180px;
  background: var(--aa-surface);
  border: 1px solid var(--aa-border);
  color: var(--aa-text);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  font: inherit;
}
.aa-search:focus {
  outline: 2px solid rgba(34, 211, 238, 0.45);
  border-color: transparent;
}
.aa-btn {
  appearance: none;
  border: 1px solid var(--aa-border);
  background: var(--aa-surface-2);
  color: var(--aa-text);
  border-radius: 12px;
  padding: 0.65rem 0.95rem;
  font: inherit;
  cursor: pointer;
  min-height: 42px;
}
.aa-btn:hover { border-color: rgba(34, 211, 238, 0.45); }
.aa-btn-primary {
  background: linear-gradient(135deg, #0891b2, #7c3aed);
  border-color: transparent;
}
.aa-btn-ghost { background: transparent; }
.aa-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.aa-btn-sm { min-height: 36px; padding: 0.4rem 0.7rem; font-size: 0.85rem; }
.aa-btn-icon {
  width: 40px; height: 40px; min-height: 40px;
  padding: 0; border-radius: 50%;
  display: inline-grid; place-items: center;
}

.aa-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 1.25rem 6.5rem;
}

.aa-sidebar {
  background: rgba(18, 26, 43, 0.9);
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
  padding: 0.85rem;
  height: fit-content;
  position: sticky;
  top: 76px;
}
.aa-side-title {
  margin: 0 0 0.65rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--aa-muted);
}
.aa-cat-list { display: flex; flex-direction: column; gap: 0.35rem; }
.aa-cat {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--aa-text);
  border-radius: 12px;
  padding: 0.55rem 0.65rem;
  font: inherit;
  cursor: pointer;
}
.aa-cat:hover { background: rgba(255,255,255,0.04); }
.aa-cat.is-active {
  background: linear-gradient(135deg, rgba(34,211,238,.14), rgba(167,139,250,.16));
  border-color: var(--aa-border);
}
.aa-cat-ico {
  width: 32px; height: 32px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--aa-surface-2);
  font-size: 1.05rem;
  flex: 0 0 auto;
}
.aa-cat-text { display: flex; flex-direction: column; min-width: 0; }
.aa-cat-text strong { font-size: 0.9rem; font-weight: 600; }
.aa-cat-text small { color: var(--aa-muted); font-size: 0.72rem; }
.aa-cat-count {
  margin-left: auto;
  color: var(--aa-muted);
  font-size: 0.75rem;
  background: rgba(255,255,255,0.05);
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
}

.aa-main { min-width: 0; }
.aa-stats {
  margin: 0 0 0.75rem;
  color: var(--aa-muted);
  font-size: 0.88rem;
}

.aa-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.85rem;
}

.aa-card {
  background: linear-gradient(180deg, rgba(24,35,56,.95), rgba(18,26,43,.98));
  border: 1px solid var(--aa-border);
  border-radius: var(--aa-radius);
  padding: 0.9rem;
  box-shadow: var(--aa-shadow);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 210px;
  transition: transform .15s ease, border-color .15s ease;
}
.aa-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.35);
}
.aa-card.is-playing {
  border-color: rgba(52, 211, 153, 0.55);
  box-shadow: 0 0 0 1px rgba(52, 211, 153, 0.25), var(--aa-shadow);
}
.aa-card-head {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}
.aa-card-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  display: grid; place-items: center;
  font-size: 1.55rem;
  background: linear-gradient(145deg, rgba(34,211,238,.18), rgba(167,139,250,.2));
  border: 1px solid var(--aa-border);
  flex: 0 0 auto;
}
.aa-card-titles { min-width: 0; flex: 1; }
.aa-card-titles h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
}
.aa-card-titles .aa-en {
  margin: 0.15rem 0 0;
  color: var(--aa-muted);
  font-size: 0.86rem;
}
.aa-card-desc {
  margin: 0;
  color: var(--aa-muted);
  font-size: 0.82rem;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.4em;
}
.aa-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.aa-tag {
  font-size: 0.68rem;
  color: #c4b5fd;
  background: rgba(167, 139, 250, 0.12);
  border: 1px solid rgba(167, 139, 250, 0.22);
  border-radius: 999px;
  padding: 0.12rem 0.45rem;
}
.aa-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  color: var(--aa-muted);
  font-size: 0.78rem;
  margin-top: auto;
}
.aa-card-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}
.aa-fav.is-on {
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.45);
}

.aa-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--aa-muted);
  border: 1px dashed var(--aa-border);
  border-radius: var(--aa-radius);
  background: rgba(18, 26, 43, 0.5);
}

.aa-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

/* Premium sticky player — tool UI only (no AI copy). LTR sliders. */
.aa-player {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 1.5rem));
  background: linear-gradient(145deg, rgba(18, 28, 48, 0.97), rgba(12, 18, 32, 0.98));
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 20px;
  box-shadow: 0 18px 55px rgba(0,0,0,.5), 0 0 0 1px rgba(167, 139, 250, 0.08);
  backdrop-filter: blur(16px);
  padding: 0.85rem 1rem;
  z-index: 50;
  display: flex;
  gap: 0.85rem;
  align-items: center;
  direction: ltr !important;
}
.aa-player.is-hidden { display: none; }
.aa-player-art {
  width: 56px; height: 56px;
  border-radius: 14px;
  flex: 0 0 56px;
  display: grid; place-items: center;
  font-size: 1.6rem;
  background: linear-gradient(145deg, rgba(34,211,238,.22), rgba(167,139,250,.28));
  border: 1px solid var(--aa-border);
  overflow: hidden;
}
.aa-player-art img { width: 100%; height: 100%; object-fit: cover; display: block; }
.aa-player-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.aa-player-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: center;
}
.aa-player-info { min-width: 0; }
.aa-player-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.aa-player-sub {
  margin: 0.12rem 0 0;
  color: var(--aa-muted);
  font-size: 0.78rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.aa-player-controls {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}
.aa-play-main {
  width: 44px !important; height: 44px !important;
  font-size: 1rem;
}
.aa-progress-wrap, .aa-volume-wrap {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  direction: ltr !important;
}
.aa-wave-progress { width: 100%; }
.aa-wave-track {
  position: relative;
  flex: 1;
  height: 28px;
  display: flex;
  align-items: center;
}
.aa-wave-bars {
  position: absolute;
  inset: 6px 0;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(34, 211, 238, 0.22) 0 3px,
      transparent 3px 6px
    );
  border-radius: 4px;
  opacity: 0.85;
  pointer-events: none;
}
.aa-wave-fill {
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 0%;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(52, 211, 153, 0.75) 0 3px,
      transparent 3px 6px
    );
  border-radius: 4px;
  pointer-events: none;
  transition: width 0.05s linear;
}
.aa-wave-range {
  position: relative;
  z-index: 2;
  background: transparent !important;
  height: 28px;
}
.aa-wave-range::-webkit-slider-runnable-track {
  height: 4px;
  background: rgba(148, 163, 184, 0.25);
  border-radius: 999px;
}
.aa-time { font-size: 0.72rem; color: var(--aa-muted); min-width: 2.4rem; font-variant-numeric: tabular-nums; }

/* CRITICAL: sliders always physical LTR (min left, max right) */
input[type="range"].aa-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--aa-accent), var(--aa-accent-2));
  outline: none;
  direction: ltr !important;
  writing-mode: horizontal-tb !important;
  transform: none !important;
  unicode-bidi: isolate;
  cursor: pointer;
}
input[type="range"].aa-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--aa-accent);
  box-shadow: 0 0 0 3px rgba(34,211,238,.2);
}
input[type="range"].aa-range::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--aa-accent);
}
.aa-volume-wrap .aa-range { width: 90px; }

.aa-skel {
  height: 210px;
  border-radius: var(--aa-radius);
  background: linear-gradient(90deg, #152033 25%, #1c2a42 50%, #152033 75%);
  background-size: 200% 100%;
  animation: aa-shimmer 1.1s infinite linear;
  border: 1px solid var(--aa-border);
}
@keyframes aa-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (max-width: 900px) {
  .aa-layout { grid-template-columns: 1fr; }
  .aa-sidebar {
    position: static;
    overflow-x: auto;
  }
  .aa-cat-list {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }
  .aa-cat { min-width: max-content; }
  .aa-nav { display: none; }
  .aa-player {
    bottom: 0.6rem;
    flex-wrap: wrap;
  }
  .aa-player-art { width: 48px; height: 48px; flex-basis: 48px; font-size: 1.35rem; }
  .aa-volume-wrap { display: none; }
  .aa-player-top { grid-template-columns: auto 1fr; }
}

@media (max-width: 560px) {
  .aa-grid { grid-template-columns: 1fr; }
  .aa-top { padding: 0.7rem 0.85rem; }
  .aa-hero, .aa-toolbar, .aa-layout { padding-left: 0.85rem; padding-right: 0.85rem; }
}

/* Mobile Audio Arts — sticky mini player, dense cards */
@media (max-width: 767.98px) {
  .aa-hero { padding: 0.75rem 0.85rem 0.25rem; }
  .aa-hero h1 { font-size: 1.15rem; }
  .aa-sub { font-size: 0.85rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .aa-layout {
    grid-template-columns: 1fr;
    padding: 0.65rem 0.75rem calc(100px + env(safe-area-inset-bottom, 0px));
    gap: 0.65rem;
  }
  .aa-sidebar {
    position: sticky;
    top: 52px;
    z-index: 5;
    padding: 0.45rem;
    border-radius: 12px;
  }
  .aa-side-title { display: none; }
  .aa-cat-list {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.35rem;
    -webkit-overflow-scrolling: touch;
  }
  .aa-cat {
    flex: 0 0 auto;
    padding: 0.4rem 0.55rem;
    min-height: 44px;
  }
  .aa-cat-text small { display: none; }
  .aa-cat-count { display: none; }
  .aa-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.55rem;
  }
  .aa-card {
    min-height: 0;
    padding: 0.65rem;
    gap: 0.4rem;
  }
  .aa-card-desc { -webkit-line-clamp: 1; min-height: 0; font-size: 0.72rem; }
  .aa-card-icon { width: 40px; height: 40px; font-size: 1.2rem; border-radius: 12px; }
  .aa-player {
    left: 0; right: 0;
    bottom: 0;
    transform: none;
    width: 100%;
    max-width: none;
    border-radius: 16px 16px 0 0;
    padding: 0.55rem 0.75rem calc(0.55rem + env(safe-area-inset-bottom, 0px));
    gap: 0.55rem;
  }
  .aa-player-art { width: 44px; height: 44px; flex-basis: 44px; border-radius: 10px; font-size: 1.2rem; }
  .aa-player-title { font-size: 0.85rem; }
  .aa-player-sub { font-size: 0.7rem; }
  .aa-play-main { width: 40px !important; height: 40px !important; }
  .aa-pager { margin-bottom: 0.5rem; }
  input[type="range"].aa-range {
    direction: ltr !important;
  }
}
@media (min-width: 768px) and (max-width: 1199.98px) {
  .aa-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .aa-layout { grid-template-columns: 200px 1fr; }
}