/* ─── TOKENS ─────────────────────────────────────────────────── */
:root {
  --bg: #f0f4fb;
  --surface: #ffffff;
  --surface-raised: #eef2fb;
  --text-primary: #1a2847;
  --text-secondary: #3d5278;
  --text-muted: #6b82a0;
  --accent: #2358CF;
  --accent-hover: #1a44a8;
  --accent-light: #8AACF8;
  --accent-subtle: #eef4ff;
  --border: #cdd8ef;
  --shadow-sm: 0 1px 4px rgba(35,88,207,.07);
  --shadow-md: 0 4px 18px rgba(35,88,207,.11);
  --shadow-lg: 0 8px 32px rgba(35,88,207,.14);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --sidebar-w: 280px;
  --header-h: 60px;
  --font: 'Montserrat', sans-serif;

  /* ── Category chip colors ─────────────────────────────────── */
  /* Discipline: blue */
  --cat-discipline-bg: #dbeafe; --cat-discipline-text: #1e40af; --cat-discipline-acc: #3b82f6;
  /* Use Case: purple */
  --cat-usecase-bg: #ede9fe;    --cat-usecase-text: #5b21b6;   --cat-usecase-acc: #7c3aed;
  /* Ease of Use: yellow → amber → burnt orange (3 semantic values) */
  --ease-beg-bg: #fefce8;   --ease-beg-text: #713f12;   --ease-beg-acc: #ca8a04;
  --ease-some-bg: #fef3c7;  --ease-some-text: #92400e;  --ease-some-acc: #d97706;
  --ease-adv-bg: #fed7aa;   --ease-adv-text: #7c2d12;   --ease-adv-acc: #ea580c;
  /* Cost: green / soft-yellow / red (semantic) */
  --cost-free-bg: #d1fae5;      --cost-free-text: #065f46;    --cost-free-acc: #10b981;
  --cost-freemium-bg: #dcfce7;  --cost-freemium-text: #166534; --cost-freemium-acc: #16a34a;
  --cost-paid-bg: #fee2e2;      --cost-paid-text: #7f1d1d;    --cost-paid-acc: #dc2626;
  /* Platform: bright orange */
  --cat-platform-bg: #fff7ed;   --cat-platform-text: #c2410c;  --cat-platform-acc: #f97316;
  /* Audience: lime/yellow-green */
  --cat-audience-bg: #ecfccb;   --cat-audience-text: #365314;  --cat-audience-acc: #65a30d;
  /* AI Capability: indigo */
  --cat-aicap-bg: #e0e7ff;      --cat-aicap-text: #3730a3;     --cat-aicap-acc: #6366f1;
  /* Pedagogical: fuchsia/pink */
  --cat-pedagogy-bg: #fdf4ff;   --cat-pedagogy-text: #86198f;  --cat-pedagogy-acc: #a21caf;
  /* Special Features: rose */
  --cat-special-bg: #fff1f2;    --cat-special-text: #9f1239;   --cat-special-acc: #e11d48;
  /* Collaboration: cyan */
  --cat-collab-bg: #cffafe;     --cat-collab-text: #164e63;    --cat-collab-acc: #06b6d4;
  /* Output Type: slate */
  --cat-output-bg: #f1f5f9;     --cat-output-text: #334155;    --cat-output-acc: #64748b;
}

[data-theme="dark"] {
  --bg: #0d1b2e;
  --surface: #122040;
  --surface-raised: #192e50;
  --text-primary: #e8f0fc;
  --text-secondary: #b8cef0;
  --text-muted: #8aabd4;
  --accent: #8AACF8;
  --accent-hover: #adc4ff;
  --accent-light: #8AACF8;
  --accent-subtle: #192e50;
  --border: #1e3560;
  --shadow-sm: 0 1px 4px rgba(0,0,0,.25);
  --shadow-md: 0 4px 18px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.5);

  --cat-discipline-bg: #1e3a8a;  --cat-discipline-text: #bfdbfe; --cat-discipline-acc: #60a5fa;
  --cat-usecase-bg: #3b0764;     --cat-usecase-text: #e9d5ff;   --cat-usecase-acc: #a855f7;
  --ease-beg-bg: #713f12;    --ease-beg-text: #fef08a;  --ease-beg-acc: #eab308;
  --ease-some-bg: #7c3500;   --ease-some-text: #fed7aa;  --ease-some-acc: #f97316;
  --ease-adv-bg: #6b1a00;    --ease-adv-text: #fecba1;  --ease-adv-acc: #ea580c;
  --cost-free-bg: #064e3b;       --cost-free-text: #a7f3d0;    --cost-free-acc: #34d399;
  --cost-freemium-bg: #14532d;   --cost-freemium-text: #bbf7d0; --cost-freemium-acc: #4ade80;
  --cost-paid-bg: #7f1d1d;       --cost-paid-text: #fecaca;    --cost-paid-acc: #f87171;
  --cat-platform-bg: #7c2d12;    --cat-platform-text: #fed7aa;  --cat-platform-acc: #fb923c;
  --cat-audience-bg: #1a2e05;    --cat-audience-text: #d9f99d;  --cat-audience-acc: #84cc16;
  --cat-aicap-bg: #1e1b4b;       --cat-aicap-text: #c7d2fe;     --cat-aicap-acc: #818cf8;
  --cat-pedagogy-bg: #4a044e;    --cat-pedagogy-text: #f5d0fe;  --cat-pedagogy-acc: #e879f9;
  --cat-special-bg: #4c0519;     --cat-special-text: #fecdd3;   --cat-special-acc: #fb7185;
  --cat-collab-bg: #083344;      --cat-collab-text: #a5f3fc;    --cat-collab-acc: #22d3ee;
  --cat-output-bg: #0f172a;      --cat-output-text: #cbd5e1;    --cat-output-acc: #94a3b8;
}

/* Filter option label colors match chip colors per category */
.filter-group[data-cat="discipline"]      .filter-option-label { color: var(--cat-discipline-text); }
.filter-group[data-cat="useCase"]         .filter-option-label { color: var(--cat-usecase-text); }
.filter-group[data-cat="platform"]        .filter-option-label { color: var(--cat-platform-text); }
.filter-group[data-cat="audience"]        .filter-option-label { color: var(--cat-audience-text); }
.filter-group[data-cat="aiCapability"]    .filter-option-label { color: var(--cat-aicap-text); }
.filter-group[data-cat="pedagogical"]     .filter-option-label { color: var(--cat-pedagogy-text); }
.filter-group[data-cat="specialFeatures"] .filter-option-label { color: var(--cat-special-text); }
.filter-group[data-cat="collaboration"]   .filter-option-label { color: var(--cat-collab-text); }
.filter-group[data-cat="outputType"]      .filter-option-label { color: var(--cat-output-text); }

/* Cost & Ease: per-value semantic colors via data attribute */
.filter-option[data-chip="chip-cost-free"]     .filter-option-label { color: var(--cost-free-text); }
.filter-option[data-chip="chip-cost-freemium"] .filter-option-label { color: var(--cost-freemium-text); }
.filter-option[data-chip="chip-cost-paid"]     .filter-option-label { color: var(--cost-paid-text); }
.filter-option[data-chip="chip-ease-beginner"] .filter-option-label { color: var(--ease-beg-text); }
.filter-option[data-chip="chip-ease-some"]     .filter-option-label { color: var(--ease-some-text); }
.filter-option[data-chip="chip-ease-advanced"] .filter-option-label { color: var(--ease-adv-text); }

/* Library cards use normal theme card styling — no overrides needed */

/* Dark mode card icon overrides */
[data-theme="dark"] .card-bookmark-btn { color: var(--accent-light); }
[data-theme="dark"] .card-bookmark-btn.bookmarked svg { fill: var(--accent-light); }
[data-theme="dark"] .card-expand-btn {
  background: #1e3560;
  border-color: #2d4f8a;
  color: var(--accent-light);
}
[data-theme="dark"] .tool-card:hover .card-expand-btn,
[data-theme="dark"] .tool-card.expanded .card-expand-btn {
  background: #2358CF;
  border-color: var(--accent-light);
  color: #fff;
}

/* ─── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
  transition: background .2s, color .2s;
}
button { font-family: var(--font); cursor: pointer; border: none; }
input, select, textarea { font-family: var(--font); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ─── SKIP LINK ──────────────────────────────────────────────── */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--accent); color: #fff;
  padding: 8px 16px; border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 700; font-size: .85rem; z-index: 9999;
  transition: top .15s;
}
.skip-link:focus { top: 0; }

/* ─── HEADER ─────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--surface);
  border-bottom: 3px solid var(--accent);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 24px;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.header-brand { display: flex; align-items: center; gap: 16px; }
.au-logo { display: block; }
.au-logo .au-cls-1 { fill: #2a3070; }
.au-logo .au-cls-2 { fill: #e0263d; }
.au-logo .au-cls-3 { fill: #04519f; }
[data-theme="dark"] .au-logo .au-cls-1,
[data-theme="dark"] .au-logo .au-cls-2,
[data-theme="dark"] .au-logo .au-cls-3 { fill: #ffffff; }
.header-divider { width: 1px; height: 32px; background: var(--border); }
.header-title { display: flex; flex-direction: column; gap: 1px; }
.header-eyebrow { font-size: .6rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); }
.header-name { font-size: .95rem; font-weight: 700; color: var(--text-primary); line-height: 1.2; }

.header-actions { display: flex; align-items: center; gap: 10px; }

.library-btn {
  display: flex; align-items: center; gap: 7px;
  background: var(--accent);
  border: 2px solid var(--accent);
  border-radius: 20px; padding: 6px 16px;
  font-size: .8rem; font-weight: 700;
  color: #fff;
  transition: background .15s, border-color .15s, transform .1s;
}
.library-btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-1px); }
.library-header-count {
  background: #fff; color: var(--accent);
  border-radius: 10px; font-size: .68rem; font-weight: 800;
  padding: 1px 7px; line-height: 1.4;
}

.theme-toggle {
  background: var(--surface-raised); border: 1px solid var(--border);
  border-radius: 20px; padding: 6px 12px;
  color: var(--accent);
  transition: background .15s, border-color .15s;
  display: flex; align-items: center;
}
.theme-toggle:hover { background: var(--accent-subtle); border-color: var(--accent-light); }

/* Show sun in light mode, moon in dark mode */
.theme-icon-sun  { display: block; }
.theme-icon-moon { display: none; }
[data-theme="dark"] .theme-icon-sun  { display: none; }
[data-theme="dark"] .theme-icon-moon { display: block; }

/* ─── LAYOUT ─────────────────────────────────────────────────── */
.app-layout {
  max-width: 1400px; margin: 0 auto;
  padding: 24px 24px 0;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: 0 24px;
  min-height: calc(100vh - var(--header-h));
  align-items: start;
}

/* ─── SIDEBAR TOGGLE (mobile) ────────────────────────────────── */
.sidebar-toggle {
  display: none; grid-column: 1 / -1;
  align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 10px 16px;
  font-size: .85rem; font-weight: 600; color: var(--text-secondary);
  box-shadow: var(--shadow-sm); margin-bottom: 16px; width: 100%;
}
.sidebar-toggle:hover { background: var(--surface-raised); }
.filter-badge-count {
  background: var(--accent); color: #fff; border-radius: 10px;
  font-size: .7rem; font-weight: 700; padding: 1px 7px; line-height: 1.4;
}

/* ─── FILTER SIDEBAR ─────────────────────────────────────────── */
.filter-sidebar {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px 16px;
  position: sticky; top: calc(var(--header-h) + 24px);
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--border) transparent;
  box-shadow: var(--shadow-sm);
}
.filter-sidebar::-webkit-scrollbar { width: 4px; }
.filter-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.section-eyebrow { font-size: .65rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.clear-all-btn {
  background: none; border: none; font-size: .75rem; font-weight: 600;
  color: var(--text-muted); padding: 2px 6px; border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.clear-all-btn:hover { color: var(--accent); background: var(--accent-subtle); }

/* Active filter chips */
.active-filters { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.active-filter-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.active-chip {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--accent-subtle); border: 1px solid var(--accent-light);
  color: var(--accent); border-radius: 20px;
  font-size: .72rem; font-weight: 600; padding: 3px 10px;
  cursor: pointer; transition: background .15s, color .15s; min-height: 28px;
}
.active-chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.active-chip-x { font-size: .9rem; line-height: 1; }

/* Search */
.search-group { margin-bottom: 14px; }
.search-input {
  width: 100%; background: var(--surface-raised);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 8px 12px; font-size: .82rem; color: var(--text-primary);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { border-color: var(--accent-light); box-shadow: 0 0 0 3px rgba(138,172,248,.2); }

/* Cross-disciplinary toggle */
.cross-disc-toggle {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--cat-discipline-bg);
  border: 1px solid var(--cat-discipline-acc);
  border-radius: var(--radius-md); padding: 9px 12px;
  margin: 0 0 6px; cursor: pointer; transition: opacity .15s;
}
.cross-disc-toggle:hover { opacity: .85; }
.cross-disc-toggle input[type="checkbox"] {
  width: 15px; height: 15px;
  accent-color: var(--cat-discipline-acc); flex-shrink: 0; margin-top: 2px; cursor: pointer;
}
.cross-disc-text { display: flex; flex-direction: column; gap: 2px; }
.cross-disc-title { font-size: .75rem; font-weight: 700; color: var(--cat-discipline-text); line-height: 1.3; }
.cross-disc-sub { font-size: .68rem; color: var(--text-muted); line-height: 1.3; }

/* Filter section labels */
.filter-section-label {
  font-size: .6rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-muted); padding: 12px 0 6px;
  border-top: 1px solid var(--border); margin-top: 6px;
}

/* Filter groups */
.filter-group { margin-bottom: 3px; }

.filter-group-toggle {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  border: none; border-radius: var(--radius-sm);
  padding: 7px 10px; font-size: .8rem; font-weight: 700;
  transition: opacity .15s; text-align: left; min-height: 36px;
  /* default neutral — overridden per category below */
  background: var(--surface-raised); color: var(--text-secondary);
}
.filter-group-toggle:hover { opacity: .85; }
.filter-group-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }
.chevron { transition: transform .2s; flex-shrink: 0; opacity: .7; }

/* Category-colored toggle backgrounds */
.filter-group[data-cat="discipline"]      .filter-group-toggle { background: var(--cat-discipline-bg); color: var(--cat-discipline-text); }
.filter-group[data-cat="useCase"]         .filter-group-toggle { background: var(--cat-usecase-bg);    color: var(--cat-usecase-text); }
.filter-group[data-cat="easeOfUse"]       .filter-group-toggle { background: var(--ease-some-bg);      color: var(--ease-some-text); }
.filter-group[data-cat="cost"]            .filter-group-toggle { background: var(--cost-free-bg);      color: var(--cost-free-text); }
.filter-group[data-cat="platform"]        .filter-group-toggle { background: var(--cat-platform-bg);   color: var(--cat-platform-text); }
.filter-group[data-cat="audience"]        .filter-group-toggle { background: var(--cat-audience-bg);   color: var(--cat-audience-text); }
.filter-group[data-cat="aiCapability"]    .filter-group-toggle { background: var(--cat-aicap-bg);      color: var(--cat-aicap-text); }
.filter-group[data-cat="pedagogical"]     .filter-group-toggle { background: var(--cat-pedagogy-bg);   color: var(--cat-pedagogy-text); }
.filter-group[data-cat="specialFeatures"] .filter-group-toggle { background: var(--cat-special-bg);    color: var(--cat-special-text); }
.filter-group[data-cat="collaboration"]   .filter-group-toggle { background: var(--cat-collab-bg);     color: var(--cat-collab-text); }
.filter-group[data-cat="outputType"]      .filter-group-toggle { background: var(--cat-output-bg);     color: var(--cat-output-text); }

.filter-options { padding: 4px 6px 8px 12px; display: flex; flex-direction: column; gap: 2px; }
.filter-options.collapsed { display: none; }

.filter-option {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 6px; border-radius: var(--radius-sm);
  cursor: pointer; transition: background .12s; user-select: none; min-height: 30px;
}
.filter-option:hover { background: var(--surface-raised); }
.filter-option input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--accent); flex-shrink: 0; cursor: pointer; }
.filter-option-label { font-size: .78rem; color: var(--text-secondary); flex: 1; cursor: pointer; line-height: 1.3; }
.filter-option-count {
  font-size: .67rem; color: var(--text-muted); background: var(--surface-raised);
  border-radius: 10px; padding: 1px 6px; flex-shrink: 0; min-width: 20px; text-align: center;
}
.filter-option.checked .filter-option-label { color: var(--accent); font-weight: 600; }
.filter-option.checked .filter-option-count { background: var(--accent-subtle); color: var(--accent); }

/* ─── MAIN CONTENT ───────────────────────────────────────────── */
.main-content { min-width: 0; padding-bottom: 40px; }
.results-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 16px; flex-wrap: wrap; }
.results-count { font-size: .8rem; font-weight: 600; color: var(--text-muted); }
.results-count strong { color: var(--text-primary); }
.sort-row { display: flex; align-items: center; gap: 8px; }
.sort-label { font-size: .75rem; font-weight: 600; color: var(--text-muted); }
.sort-select {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 5px 10px; font-size: .78rem; color: var(--text-secondary); cursor: pointer; outline: none;
}
.sort-select:focus { border-color: var(--accent-light); }

.info-banner {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--accent-subtle); border: 1px solid var(--accent-light);
  border-radius: var(--radius-md); padding: 10px 14px;
  font-size: .78rem; color: var(--text-secondary); margin-bottom: 16px;
}
.info-banner svg { flex-shrink: 0; margin-top: 1px; color: var(--accent); }

/* ─── TOOL GRID ──────────────────────────────────────────────── */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }

/* ─── TOOL CARD ──────────────────────────────────────────────── */
.tool-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
  transition: box-shadow .2s, border-color .2s, transform .15s;
  display: flex; flex-direction: column; cursor: pointer; position: relative; overflow: hidden;
}
.tool-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent-light); transform: translateY(-1px); }
.tool-card.expanded { border-color: var(--accent); box-shadow: var(--shadow-lg); grid-column: span 2; }

.tool-card::before { content: ''; display: block; height: 4px; background: var(--cat-discipline-acc); flex-shrink: 0; }

.card-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }

.card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.card-name-block { flex: 1; min-width: 0; }
.card-name { font-size: .95rem; font-weight: 700; color: var(--text-primary); line-height: 1.25; }
.card-company { font-size: .72rem; color: var(--text-muted); font-weight: 500; margin-top: 2px; }

.card-header-btns { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.card-bookmark-btn {
  background: none; border: none; padding: 3px;
  color: var(--text-muted); border-radius: var(--radius-sm);
  transition: color .15s, transform .1s; line-height: 1;
  display: flex; align-items: center;
}
.card-bookmark-btn:hover { color: var(--accent); transform: scale(1.1); }
.card-bookmark-btn.bookmarked { color: var(--accent); }
.card-bookmark-btn.bookmarked svg { fill: var(--accent); }

.card-expand-btn {
  background: var(--surface-raised); border: 1px solid var(--border);
  border-radius: 50%; width: 26px; height: 26px; min-width: 26px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; color: var(--text-muted);
  transition: background .15s, color .15s, border-color .15s;
  font-size: 16px; line-height: 1;
}
.tool-card:hover .card-expand-btn,
.tool-card.expanded .card-expand-btn { background: var(--accent-subtle); border-color: var(--accent-light); color: var(--accent); }

.card-description { font-size: .8rem; color: var(--text-secondary); line-height: 1.6; }
.card-primary-tags { display: flex; flex-wrap: wrap; gap: 5px; }

/* User note on card (when bookmarked and note exists) */
.card-user-note {
  font-size: .75rem; color: var(--text-muted); font-style: italic;
  background: var(--surface-raised); border-left: 3px solid var(--accent-light);
  padding: 6px 10px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.5;
}

/* ─── CHIPS ──────────────────────────────────────────────────── */
.chip {
  display: inline-flex; align-items: center; border-radius: 20px;
  font-size: .68rem; font-weight: 700; padding: 3px 9px;
  white-space: nowrap; border: 1px solid transparent;
  background: var(--surface-raised); color: var(--text-secondary); border-color: var(--border);
}
.chip.clickable { cursor: pointer; transition: opacity .15s, transform .1s; }
.chip.clickable:hover { opacity: .82; transform: scale(1.04); }

.chip-discipline   { background: var(--cat-discipline-bg); color: var(--cat-discipline-text); border-color: var(--cat-discipline-bg); }
.chip-usecase      { background: var(--cat-usecase-bg);    color: var(--cat-usecase-text);    border-color: var(--cat-usecase-bg); }
.chip-platform     { background: var(--cat-platform-bg);   color: var(--cat-platform-text);   border-color: var(--cat-platform-bg); }
.chip-audience     { background: var(--cat-audience-bg);   color: var(--cat-audience-text);   border-color: var(--cat-audience-bg); }
.chip-aicap        { background: var(--cat-aicap-bg);      color: var(--cat-aicap-text);      border-color: var(--cat-aicap-bg); }
.chip-pedagogy     { background: var(--cat-pedagogy-bg);   color: var(--cat-pedagogy-text);   border-color: var(--cat-pedagogy-bg); }
.chip-special      { background: var(--cat-special-bg);    color: var(--cat-special-text);    border-color: var(--cat-special-bg); }
.chip-collab       { background: var(--cat-collab-bg);     color: var(--cat-collab-text);     border-color: var(--cat-collab-bg); }
.chip-output       { background: var(--cat-output-bg);     color: var(--cat-output-text);     border-color: var(--cat-output-bg); }

.chip-cost-free     { background: var(--cost-free-bg);     color: var(--cost-free-text);     border-color: var(--cost-free-bg); }
.chip-cost-freemium { background: var(--cost-freemium-bg); color: var(--cost-freemium-text); border-color: var(--cost-freemium-bg); }
.chip-cost-paid     { background: var(--cost-paid-bg);     color: var(--cost-paid-text);     border-color: var(--cost-paid-bg); }

.chip-ease-beginner { background: var(--ease-beg-bg);  color: var(--ease-beg-text);  border-color: var(--ease-beg-bg); }
.chip-ease-some     { background: var(--ease-some-bg); color: var(--ease-some-text); border-color: var(--ease-some-bg); }
.chip-ease-advanced { background: var(--ease-adv-bg);  color: var(--ease-adv-text);  border-color: var(--ease-adv-bg); }

/* ─── EXPANDED CARD ──────────────────────────────────────────── */
.card-expanded-content { border-top: 1px solid var(--border); padding: 14px 18px 0; display: flex; flex-direction: column; gap: 12px; }
.card-section-label { font-size: .59rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 5px; }
.card-tags-group { display: flex; flex-direction: column; gap: 4px; }
.card-tags-row { display: flex; flex-wrap: wrap; gap: 5px; }
.card-actions { display: flex; align-items: center; justify-content: flex-end; padding: 12px 0 4px; border-top: 1px solid var(--border); margin-top: 2px; }
.visit-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #fff; border: none;
  border-radius: var(--radius-md); padding: 9px 18px;
  font-size: .82rem; font-weight: 700; text-decoration: none;
  transition: background .15s, transform .1s; min-height: 40px;
}
.visit-btn:hover { background: var(--accent-hover); color: #fff; text-decoration: none; transform: translateY(-1px); }

/* ─── EMPTY STATE ────────────────────────────────────────────── */
.empty-state { grid-column: 1 / -1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; padding: 64px 24px; color: var(--text-muted); text-align: center; }
.empty-state p { font-size: .9rem; font-weight: 500; }
.btn-secondary { background: none; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 9px 18px; font-size: .82rem; font-weight: 600; color: var(--text-secondary); transition: background .15s, border-color .15s, color .15s; min-height: 40px; }
.btn-secondary:hover { background: var(--accent-subtle); border-color: var(--accent-light); color: var(--accent); }

/* ─── MY LIBRARY PANEL ───────────────────────────────────────── */

/* Panel background tokens — flipped intentionally for contrast */
:root {
  --lib-bg: #0f2040;           /* dark navy in light mode — contrasts white page */
  --lib-border: #1e3a6e;
  --lib-text: #dce6f5;
  --lib-text-muted: #8AACF8;
  --lib-close-bg: #8AACF8;
  --lib-close-color: #0f2040;
  --lib-item-bg: #ffffff;      /* white — matches light mode card style */
  --lib-note-bg: #f0f4fb;
}
[data-theme="dark"] {
  --lib-bg: #dbeafe;           /* light blue in dark mode — contrasts dark page */
  --lib-border: #93c5fd;
  --lib-text: #1e3a6e;
  --lib-text-muted: #3b6cbf;
  --lib-close-bg: #1e40af;
  --lib-close-color: #ffffff;
  --lib-item-bg: #122040;      /* dark surface — matches dark mode card style */
  --lib-note-bg: #192e50;
}

.library-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  z-index: 200; backdrop-filter: blur(2px);
  animation: fadeIn .2s ease;
}
.library-panel {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: min(480px, 100vw);
  background: var(--lib-bg);
  border-left: 1px solid var(--lib-border);
  box-shadow: -8px 0 40px rgba(0,0,0,.2);
  z-index: 201;
  display: flex; flex-direction: column;
  animation: slideIn .25s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }

.library-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--lib-border);
  flex-shrink: 0;
}
.library-panel-title {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: .95rem; color: var(--lib-text);
}
.library-panel-count {
  font-size: .72rem; font-weight: 600;
  color: var(--lib-text-muted);
  background: rgba(255,255,255,.3);
  border-radius: 10px; padding: 2px 8px;
}

/* Close button — always high-contrast */
.library-close {
  background: var(--lib-close-bg);
  border: none;
  color: var(--lib-close-color);
  border-radius: var(--radius-sm);
  padding: 7px; display: flex; align-items: center; justify-content: center;
  transition: opacity .15s, transform .1s;
  flex-shrink: 0;
}
.library-close:hover { opacity: .85; transform: scale(1.05); }

.library-panel-actions {
  display: flex; gap: 8px; padding: 14px 20px;
  border-bottom: 1px solid var(--lib-border);
  flex-shrink: 0; flex-wrap: wrap;
}
.lib-action-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.25);
  border: 1px solid var(--lib-border);
  border-radius: var(--radius-md); padding: 7px 12px;
  font-size: .75rem; font-weight: 700; color: var(--lib-text);
  cursor: pointer; transition: background .15s;
}
.lib-action-btn:hover { background: rgba(255,255,255,.45); }

.library-save-hint {
  font-size: .72rem;
  line-height: 1.6;
  font-style: italic;
  color: var(--lib-text-muted);
  padding: 0 20px 14px;
  border-bottom: 1px solid var(--lib-border);
  flex-shrink: 0;
}

.library-tools-list {
  flex: 1; overflow-y: auto; padding: 16px 20px;
  display: flex; flex-direction: column; gap: 14px;
  scrollbar-width: thin; scrollbar-color: var(--lib-border) transparent;
}
.library-tools-list::-webkit-scrollbar { width: 4px; }
.library-tools-list::-webkit-scrollbar-thumb { background: var(--lib-border); border-radius: 2px; }

.library-tool-item {
  background: var(--lib-item-bg); border: 1px solid var(--lib-border);
  border-radius: var(--radius-lg); padding: 14px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.library-tool-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.library-tool-name { font-size: .9rem; font-weight: 700; color: var(--text-primary); }
.library-tool-company { font-size: .7rem; color: var(--text-muted); font-weight: 500; margin-top: 2px; }
.library-tool-desc { font-size: .78rem; color: var(--text-secondary); line-height: 1.55; }
.library-tool-chips { display: flex; flex-wrap: wrap; gap: 4px; }

.library-remove-btn {
  background: none; border: none; padding: 4px;
  color: var(--text-muted); border-radius: var(--radius-sm);
  transition: color .15s, background .15s; flex-shrink: 0; display: flex;
}
.library-remove-btn:hover { color: #dc2626; background: #fee2e2; }

.library-note-label {
  font-size: .65rem; font-weight: 800; letter-spacing: .08em;
  text-transform: uppercase; color: var(--text-muted);
}
.library-note-input {
  width: 100%; background: var(--lib-note-bg); border: 1px solid var(--lib-border);
  border-radius: var(--radius-sm); padding: 7px 10px;
  font-size: .78rem; color: var(--text-primary); line-height: 1.5;
  resize: vertical; min-height: 60px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.library-note-input::placeholder { color: var(--text-muted); }
.library-note-input:focus { border-color: var(--accent-light); box-shadow: 0 0 0 3px rgba(138,172,248,.2); }

.library-tool-actions { display: flex; justify-content: flex-end; }
.library-visit-btn {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .75rem; font-weight: 700; color: var(--accent);
  background: none; border: 1px solid var(--accent-light);
  border-radius: var(--radius-sm); padding: 5px 12px;
  text-decoration: none; transition: background .15s;
}
.library-visit-btn:hover { background: var(--accent-subtle); text-decoration: none; }

.library-empty-state {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; padding: 40px 24px; color: var(--lib-text-muted); text-align: center;
}
.library-empty-state p { font-size: .82rem; line-height: 1.6; }

/* ─── DATA PRIVACY SECTION ───────────────────────────────────── */
.privacy-section { background: var(--surface); border-top: 1px solid var(--border); margin-top: 48px; padding: 56px 24px; }
.privacy-inner { max-width: 1400px; margin: 0 auto; }
.privacy-title { font-size: 1.4rem; font-weight: 800; color: var(--text-primary); margin-top: 8px; margin-bottom: 28px; }
.privacy-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.privacy-card { background: var(--surface-raised); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.privacy-card-icon { font-size: 1.5rem; line-height: 0; }

/* Privacy icon colors — light mode */
.picon-ferpa-1 { fill: #0000db; }
.picon-inst-1 { fill: #0000db; stroke: #fff; stroke-miterlimit: 10; stroke-width: .05px; }
.picon-inst-2 { fill: #0000db; stroke: #0000db; stroke-linecap: round; stroke-linejoin: round; stroke-width: .48px; }
.picon-inst-3 { fill: #fff; }
.picon-inst-4 { fill: none; stroke: #0000db; stroke-linecap: round; stroke-linejoin: round; stroke-width: .48px; }
.picon-acad-1 { fill: #0000db; }
.picon-gs-1 { fill: #03519f; }
.picon-gs-2 { fill: #2a2f70; }
.picon-gs-3 { fill: #df263d; }

/* Privacy icon colors — dark mode (all white) */
[data-theme="dark"] .picon-ferpa-1,
[data-theme="dark"] .picon-inst-1,
[data-theme="dark"] .picon-inst-2,
[data-theme="dark"] .picon-acad-1,
[data-theme="dark"] .picon-gs-1,
[data-theme="dark"] .picon-gs-2,
[data-theme="dark"] .picon-gs-3 { fill: #ffffff; stroke: none; }
[data-theme="dark"] .picon-inst-3 { fill: #ffffff; }
[data-theme="dark"] .picon-inst-4 { fill: none; stroke: #ffffff; }
.privacy-card h3 { font-size: .9rem; font-weight: 700; color: var(--text-primary); }
.privacy-card p { font-size: .8rem; color: var(--text-secondary); line-height: 1.6; }
.privacy-card a { color: var(--accent); text-decoration: underline; }
.privacy-card a:hover { color: var(--accent-dark, var(--accent)); }

.consultation-block { margin-top: 32px; padding: 24px 28px; background: var(--surface-raised); border: 1px solid var(--border); border-radius: var(--radius-lg); display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.consultation-block h3 { font-size: .95rem; font-weight: 700; color: var(--text-primary); margin: 0; flex-shrink: 0; }
.consultation-block p { font-size: .82rem; color: var(--text-secondary); margin: 0; flex: 1; min-width: 180px; }
.consultation-link { display: inline-block; padding: 8px 18px; background: var(--accent); color: #fff; border-radius: var(--radius); font-size: .82rem; font-weight: 600; text-decoration: none; white-space: nowrap; flex-shrink: 0; }
.consultation-link:hover { opacity: .88; }

/* ─── FOOTER ─────────────────────────────────────────────────── */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); padding: 20px 24px; }
.footer-inner { max-width: 1400px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .75rem; color: var(--text-muted); font-weight: 500; }
.footer-contact a { color: var(--text-muted); text-decoration: underline; }
.footer-contact a:hover { color: var(--text-secondary); }

/* ─── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 860px) {
  .app-layout { grid-template-columns: 1fr; padding: 16px 16px 0; }
  .sidebar-toggle { display: flex; }
  .filter-sidebar { position: static; max-height: none; display: none; grid-column: 1; margin-bottom: 16px; }
  .filter-sidebar.open { display: block; }
  .tool-card.expanded { grid-column: span 1; }
  .header-inner { padding: 0 16px; }
  .header-eyebrow { display: none; }
}
@media (max-width: 540px) {
  .tool-grid { grid-template-columns: 1fr; }
  .privacy-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 4px; }
  .library-panel { width: 100vw; }
}

/* ─── PRINT STYLES (PDF export) ──────────────────────────────── */
@media print {
  body > *:not(.print-library) { display: none !important; }
  .print-library { display: block !important; font-family: var(--font); color: #1a2847; }
  .print-library-header { margin-bottom: 24px; }
  .print-library-header h1 { font-size: 1.4rem; font-weight: 800; }
  .print-library-header p { font-size: .8rem; color: #6b82a0; margin-top: 4px; }
  .print-tool { page-break-inside: avoid; border: 1px solid #cdd8ef; border-radius: 8px; padding: 16px; margin-bottom: 14px; }
  .print-tool-name { font-size: 1rem; font-weight: 700; }
  .print-tool-company { font-size: .75rem; color: #6b82a0; margin-bottom: 6px; }
  .print-tool-desc { font-size: .82rem; line-height: 1.5; margin-bottom: 8px; }
  .print-tool-url { font-size: .75rem; color: #2358CF; }
  .print-tool-note { font-size: .78rem; font-style: italic; color: #3d5278; margin-top: 8px; padding: 6px 10px; border-left: 3px solid #8AACF8; background: #f0f4fb; }
}