CUSTOM_CSS = """
/* ---------------- Theme variables (light = default) ---------------- */
@import url('https://fonts.googleapis.com/css2?family=Raleway:wght@400;600;700&family=Vazirmatn:wght@400;600&family=Poppins:wght@500;700&display=swap');

:root {
  /* Typography & global */
  --font-family: 'Raleway','Vazirmatn',sans-serif;
  --bg: #f9fafb;
  --text: #111827;

  /* Primary / accents */
  --primary-500: #2563eb;
  --primary-600: #1e40af;
  --primary-400: #3b82f6;
  --primary-300: #93c5fd;
  --primary-700: #1e3a8a;

  /* Neutral / surfaces */
  --surface-100: #ffffff;
  --surface-200: #f3f4f6;
  --muted-border: #e5e7eb;
  --muted-border-2: #e9ecef;
  --row-divider: #f0f0f0;
  --muted-text: #334155;
  --muted-text-2: #4b5563;
  --chip-bg: #eef2ff;

  /* Brand chips */
  --brand-chip-bg: #e0f2fe;
  --brand-chip-border: #bae6fd;
  --brand-chip-color: #0369a1;
  --brand-chip-selected-bg: #0ea5e9;
  --brand-chip-selected-border: #0284c7;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-subtle: 0 1px 2px rgba(0,0,0,0.04);

  /* Navbar */
  --navbar-gradient-start: var(--primary-600);
  --navbar-gradient-end: var(--primary-500);
  --navbar-border: var(--primary-700);
}

/* ---------------- Dark theme overrides (use by adding .theme-dark on body) ---------------- */
.theme-dark {
  --bg: #0b1220;
  --text: #e6eef8;

  --primary-500: #60a5fa;
  --primary-600: #3b82f6;
  --primary-400: #93c5fd;
  --primary-300: #bfdbfe;
  --primary-700: #1e3a8a;

  --surface-100: #0f1724;
  --surface-200: #071022;
  --muted-border: #1f2937;
  --muted-border-2: #111827;
  --row-divider: #172033;
  --muted-text: #cbd5e1;
  --muted-text-2: #94a3b8;
  --chip-bg: #0b1624;

  --brand-chip-bg: #062b3f;
  --brand-chip-border: #074b67;
  --brand-chip-color: #9ad8f5;
  --brand-chip-selected-bg: #0891b2;
  --brand-chip-selected-border: #036977;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.6);
  --shadow-subtle: 0 1px 2px rgba(0,0,0,0.6);

  --navbar-gradient-start: #0f1724;
  --navbar-gradient-end: #08203a;
  --navbar-border: #031024;
}

html.theme-dark,
body.theme-dark,
html.theme-dark .gradio-container,
body.theme-dark .gradio-container,
.theme-dark .gradio-container {
  background: var(--bg) !important;
  color: var(--text) !important;
}

html.theme-dark,
body.theme-dark {
  background: var(--bg) !important;
  color: var(--text) !important;
}

.theme-dark .hero .main-title {
  color: var(--text) !important;
  background: none !important;
  -webkit-background-clip: initial !important;
  -webkit-text-fill-color: initial !important;
}
.theme-dark .hero .subtitle {
  color: var(--muted-text) !important;
}

.theme-dark .tabs.svelte-1tcem6n button[role="tab"] {
  color: var(--muted-text) !important;
}
.theme-dark .tabs.svelte-1tcem6n button[role="tab"]:hover {
  color: var(--primary-300) !important;
}
.theme-dark .tabs.svelte-1tcem6n button[role="tab"].selected {
  color: var(--primary-500) !important;
}

.theme-dark .gr-checkbox-group label {
  background: transparent !important;
  color: var(--muted-text) !important;
  border-color: var(--muted-border) !important;
  box-shadow: none !important;
}
.theme-dark .gr-checkbox-group label:hover {
  background: rgba(99,102,241,0.08) !important; /* subtle bluish hover */
  border-color: var(--primary-300) !important;
}
.theme-dark .gr-checkbox-group input:checked + label {
  background: #4f46e5 !important; /* keep selected visual consistent */
  color: #fff !important;
  border-color: #4f46e5 !important;
}

.theme-dark [id^="brand_"] label {
  background: var(--brand-chip-bg) !important;
  color: var(--brand-chip-color) !important;
  border-color: var(--brand-chip-border) !important;
}
.theme-dark [id^="brand_"] label:hover {
  background: var(--brand-chip-border) !important;
}
.theme-dark [id^="brand_"] label:has(input:checked) {
  background: var(--brand-chip-selected-bg) !important;
  color: #fff !important;
  border-color: var(--brand-chip-selected-border) !important;
}

.theme-dark .all-filters-box,
.theme-dark .filters-box,
.theme-dark .table-wrapper {
  background: var(--surface-100) !important;
  border: 1px solid var(--muted-border) !important;
  box-shadow: var(--shadow-sm) !important;
  color: var(--text) !important;
}

.theme-dark .table-wrapper th {
  border-bottom: 1px solid var(--muted-border) !important;
}
.theme-dark .table-wrapper td {
  border-bottom: 1px solid var(--row-divider) !important;
}

.theme-dark .search-box input,
.theme-dark .ctx-dd select,
.theme-dark .ctx-dd button,
.theme-dark .ctx-dd .wrap-inner {
  background: var(--surface-200) !important;
  color: var(--text) !important;
  border: 1px solid var(--muted-border) !important;
}

.theme-dark .ctx-filter-pill,
.theme-dark .mini-chip {
  color: var(--muted-text) !important;
}

.theme-dark .model-col {
  color: var(--primary-300) !important;
}

.theme-dark .navbar { color: white !important; }

.theme-dark ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); }
.theme-dark ::-webkit-scrollbar-track { background: transparent; }

/* ---------------- Global ---------------- */
body, .gradio-container {
  font-family: var(--font-family) !important;
  background: var(--bg) !important;
  color: var(--text);
}

/* ---------------- Navbar ---------------- */
.navbar {
  background: linear-gradient(90deg, var(--navbar-gradient-start), var(--navbar-gradient-end));
  padding: 14px 30px;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--navbar-border);
}
.navbar-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 1px;
}
.navbar-links a {
  color: white;
  margin: 0 12px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}
.navbar-links a:hover { text-decoration: underline; }

/* ---------------- Titles ---------------- */
.main-title {
  text-align: center;
  font-size: 48px;
  font-weight: 900;
  letter-spacing: 1.5px;
  background: linear-gradient(90deg, var(--primary-700), var(--primary-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 30px 0 10px 0;
  animation: fadeInDown 1s ease;
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.section-title {
  font-size: 20px !important;
  font-weight: 600 !important;
  color: var(--primary-700) !important;
  margin: 20px 0 10px 0;
}

/* ---------------- Search Box ---------------- */
.search-box input {
  border: 2px solid var(--primary-400) !important;
  border-radius: 12px !important;
  padding: 10px 14px !important;
  font-size: 15px !important;
  transition: all 0.25s ease;
}
.search-box input:focus {
  border-color: var(--primary-700) !important;
  box-shadow: 0 0 8px rgba(30,58,138,0.3);
}

/* ---------------- Task Selector ---------------- */
.task-box label {
  font-size: 14px !important;
  font-weight: 500 !important;
  border-radius: 10px !important;
  padding: 6px 12px !important;
  background: var(--surface-200) !important;
  border: 1px solid var(--muted-border) !important;
  transition: all 0.2s ease;
}
.task-box label:hover {
  background: var(--primary-300) !important;
  border-color: var(--primary-400) !important;
}

/* ---------------- Table ---------------- */
.table-wrapper {
  border: 1px solid var(--muted-border-2) !important;
  box-shadow: var(--shadow-sm) !important;
  background: var(--surface-100) !important;
}
.table-wrapper table[border], .table-wrapper table[style*="border"] { border: none !important; }
.table-wrapper table, .table-wrapper thead, .table-wrapper tbody, .table-wrapper tr, .table-wrapper th, .table-wrapper td {
  border: 0 !important;
  border-color: var(--muted-border) !important;
}
.table-wrapper th { border-bottom: 1px solid var(--muted-border) !important; }
.table-wrapper td { border-bottom: 1px solid var(--row-divider) !important; }

#leaderboard_sbu, #leaderboard_uq, #leaderboard_aut { border: none !important; }
#leaderboard_sbu th, #leaderboard_uq th, #leaderboard_aut th { border-bottom: 1px solid var(--muted-border) !important; }
#leaderboard_sbu td,  #leaderboard_uq td,  #leaderboard_aut td  { border-bottom: 1px solid var(--row-divider) !important; }

.model-col {
  font-weight: 600;
  color: var(--primary-500);
}

/* preserve existing overrides */
.navbar { display: none !important; }
.gradio-container { padding-top: 0 !important; }
.main-title { margin-top: 24px !important; }

/* prevent resizable UI elements */
.gradio-container [style*="resize"], .gradio-container .svelte-1ipelgc, .gradio-container .svelte-drgfj1 {
  resize: none !important;
  overflow: hidden !important;
}
::-webkit-scrollbar { display: none; }

/* ---------------- Animations ---------------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- Quick Filters ---------------- */
.quick-filters-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 8px 0 12px;
}

/* All filters box */
.all-filters-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--muted-border);
  border-radius: 12px;
  background: var(--surface-100);
  box-shadow: var(--shadow-sm);
}

/* Pills (Quick + Brand filters) */
.gr-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.gr-checkbox-group input { display: none; }
.gr-checkbox-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 9999px;
  background: var(--surface-200);
  color: #1e293b;
  border: 1px solid var(--muted-border);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all .2s;
}
.gr-checkbox-group label:hover {
  background: var(--primary-300);
  border-color: var(--primary-300);
}
.gr-checkbox-group input:checked + label {
  background: #4f46e5;
  color: #fff;
  border-color: #4f46e5;
}

/* Context pill (label + dropdown) */
.ctx-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border: 1px solid var(--muted-border);
  border-radius: 9999px;
  background: var(--bg);
  box-shadow: var(--shadow-subtle);
  height: 32px;
}
.mini-chip {
  font-weight: 600;
  font-size: 12px;
  color: var(--muted-text);
}
.ctx-range select, .ctx-range button, .ctx-range .wrap-inner {
  border: none !important;
  background: transparent !important;
  font-size: 13px !important;
  height: 26px !important;
  cursor: pointer !important;
}

/* Filters box (detailed) */
.filters-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--muted-border);
  border-radius: 12px;
  background: var(--surface-100);
  box-shadow: var(--shadow-sm);
}

/* Re-declared gr-checkbox-group styles (kept for compatibility) */
.gr-checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.gr-checkbox-group input { display: none; }
.gr-checkbox-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 9999px;
  background: var(--chip-bg);
  color: #1e293b;
  border: 1px solid var(--muted-border);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: .2s;
}
.gr-checkbox-group label:hover {
  background: var(--primary-300);
  border-color: var(--primary-300);
}
.gr-checkbox-group input:checked + label {
  background: #4f46e5;
  color: #fff;
  border-color: #4f46e5;
}

/* Context dropdown label */
.ctx-dd label {
  font-weight: 600;
  font-size: 13px;
  color: var(--muted-text);
  margin-bottom: 2px;
}
.ctx-dd select, .ctx-dd button, .ctx-dd .wrap-inner {
  border: 1px solid var(--muted-border) !important;
  border-radius: 8px !important;
  padding: 4px 8px !important;
  font-size: 13px !important;
  background: var(--bg) !important;
  cursor: pointer !important;
}

/* ---------------- Brand chips (Clean) ---------------- */
.brand-row {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 6px !important;
  row-gap: 6px !important;
  margin: 0 !important;
  padding: 0 !important;
}
.brand-row > div { margin: 0 !important; padding: 0 !important; flex: 0 0 auto !important; }

/* hide native checkbox square */
[id^="brand_"] input[type="checkbox"] {
  position: absolute !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* base appearance for chip */
[id^="brand_"] label {
  position: relative !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  padding: 6px 10px 6px 42px !important;
  border-radius: 9999px !important;
  background: var(--brand-chip-bg) !important;
  color: var(--brand-chip-color) !important;
  border: 1px solid var(--brand-chip-border) !important;
  font-weight: 600 !important;
  font-size: 13px !important;
  cursor: pointer !important;
  transition: background .2s, border-color .2s, color .2s, box-shadow .2s !important;
}
[id^="brand_"] label:hover {
  background: var(--brand-chip-border) !important;
  border-color: #7dd3fc !important;
}

/* placeholder for logo: actual background-image set elsewhere */
[id^="brand_"] label::before {
  content: "" !important;
  position: absolute !important;
  left: 12px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  width: 20px !important;
  height: 20px !important;
  background-size: contain !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
}

/* ---- Only change: make selected brand-chip text dark (targeted) ---- */

/* Modern: if browser supports :has() — target label that contains a checked input */
[id^="brand_"] label.svelte-1a15wmk:has(input[type="checkbox"]:checked) span.svelte-1a15wmk {
  color: #061226 !important;   /* تیره و خوانا */
}

/* Fallback: input + span structure seen in your HTML */
[id^="brand_"] input[type="checkbox"]:checked + span.svelte-1a15wmk {
  color: #061226 !important;
}

/* Make sure unselected stay their normal color (no bg changes here) */
[id^="brand_"] span.svelte-1a15wmk {
  /* nothing forced here — نگه داشتن رنگ پیش‌فرض مگر اینکه انتخاب شده باشد */
}

/* selected brand chip */
[id^="brand_"] label:has(input:checked) {
  background: var(--brand-chip-selected-bg) !important;
  color: #fff !important;
  border-color: var(--brand-chip-selected-border) !important;
  box-shadow: 0 0 0 2px rgba(2,132,199,.25) inset !important;
}

/* ---------------- Hero title & subtitle (theme-aware) ---------------- */
.hero .main-title {
  font-size: 46px;
  font-weight: 600;
  text-align: center;
  margin: 20px 0 10px 0;
  font-family: var(--font-family);
  letter-spacing: 0.5px;
  color: var(--text) !important;
  background: none !important;
  -webkit-background-clip: initial !important;
  -webkit-text-fill-color: initial !important;
  animation: fadeInDown 1s ease-out;
}
.hero .subtitle {
  font-size: 18px;
  font-weight: 500;
  color: var(--muted-text-2);
  text-align: center;
  margin-top: 12px;
  line-height: 1.6;
  font-family: var(--font-family);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  white-space: normal;
  word-wrap: break-word;
  letter-spacing: 0.3px;
  animation: fadeInUp 1s ease-out;
}

/* alternate animation keys (kept for compatibility) */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- Tabs (Minimal Elegant) ---------------- */
.tabs.svelte-1tcem6n {
  display: flex !important;
  justify-content: center !important;
  gap: 20px !important;
  margin: 20px 0 !important;
  border: none !important;
}
.tabs.svelte-1tcem6n button[role="tab"] {
  font-family: 'Vazirmatn','Raleway',sans-serif !important;
  font-size: 20px !important;
  font-weight: 600 !important;
  padding: 12px 12px !important;
  background: transparent !important;
  color: #374151 !important;
  border: none !important;
  border-radius: 0 !important;
  cursor: pointer !important;
  transition: color .2s ease;
}
.tabs.svelte-1tcem6n button[role="tab"]:hover { color: var(--primary-500) !important; }
.tabs.svelte-1tcem6n button[role="tab"].selected {
  color: #1d4ed8 !important;
  font-weight: 600 !important;
}
"""