:root {
  --bg: #f7f6f3;
  --bg-card: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #5c5c5c;
  --border: #e8e5df;
  --accent: #3d4a5c;
  --accent-hover: #2a3441;
  --accent-soft: #eef1f5;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.1);
  --radius: 14px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #121212;
  --bg-card: #1e1e1e;
  --text: #f0eeeb;
  --text-secondary: #a0a0a0;
  --border: #333;
  --accent: #9aa8bc;
  --accent-hover: #c5d0e0;
  --accent-soft: #2a2f38;
  --shadow: 0 4px 20px rgba(0,0,0,0.35);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.45);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

[dir="rtl"] body { font-family: 'Noto Nastaliq Urdu', 'Inter', system-ui, sans-serif; }

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 50px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247,246,243,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

[data-theme="dark"] .header {
  background: rgba(18,18,18,0.85);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

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

.logo-icon { font-size: 1.5rem; }

.logo h1 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-btn, .pdf-btn-header {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.control-btn:hover, .pdf-btn-header:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.pdf-btn-header {
  font-weight: 500;
}

/* Hero */
.hero {
  padding: 50px 0 30px;
  text-align: center;
}

.hero-title {
  font-size: 2.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.03em;
  animation: fadeUp 0.6s ease;
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 32px;
  animation: fadeUp 0.6s ease 0.1s both;
}

.search-box {
  display: flex;
  gap: 10px;
  max-width: 620px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 6px;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition);
  animation: fadeUp 0.6s ease 0.2s both;
}

.search-box:focus-within {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

#searchInput {
  flex: 1;
  border: none;
  background: transparent;
  padding: 14px 18px;
  font-size: 1rem;
  color: var(--text);
  outline: none;
  font-family: inherit;
}

#searchInput::placeholder { color: var(--text-secondary); }

.search-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 26px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.search-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.search-btn:active { transform: scale(0.97); }

/* Suggestions */
.suggestions {
  margin: 30px 0 40px;
  animation: fadeUp 0.6s ease 0.3s both;
}

.suggestions h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

.topic-chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  color: var(--text);
  font-family: inherit;
}

[dir="rtl"] .topic-chip { text-align: right; }

.topic-chip:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  background: var(--accent-soft);
}

/* Results */
.results { margin-top: 10px; }

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.results-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.text-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
}

.text-btn:hover { color: var(--text); }

/* Side-by-side grid */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.result-card:hover {
  box-shadow: var(--shadow-hover);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
  background: var(--accent-soft);
  transition: background var(--transition);
}

.card-header:hover { background: var(--border); }

.card-header h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
}

.section-icon { font-size: 1.1rem; }

.count {
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 20px;
}

.toggle-icon {
  color: var(--text-secondary);
  font-size: 0.75rem;
  transition: transform var(--transition);
}

.result-card.collapsed .toggle-icon { transform: rotate(-90deg); }
.result-card.collapsed .card-body { display: none; }

.card-body {
  padding: 14px 16px;
  flex: 1;
  overflow-y: auto;
  max-height: 420px;
}

.loading {
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.result-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  transition: all var(--transition);
}

.result-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.result-ref {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}

.result-text {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text);
}

.result-text.arabic {
  font-size: 1.1rem;
  direction: rtl;
  text-align: right;
  font-family: 'Noto Nastaliq Urdu', serif;
  line-height: 1.9;
  margin-bottom: 6px;
}

.result-meta {
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.no-results {
  padding: 16px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.pdf-link {
  display: inline-flex;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.pdf-link:hover { text-decoration: underline; }

/* Footer */
.footer {
  margin-top: 60px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Click ripple (desktop) */
@media (hover: hover) and (pointer: fine) {
  .search-btn, .control-btn, .topic-chip, .pdf-btn-header, .card-header {
    position: relative;
    overflow: hidden;
  }
  .search-btn::after, .control-btn::after, .topic-chip::after, .pdf-btn-header::after, .card-header::after {
    content: '';
    position: absolute;
    width: 100%; height: 100%;
    top: 0; left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(0,0,0,0.1) 10%, transparent 10.01%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10);
    opacity: 0;
    transition: transform 0.4s, opacity 0.5s;
  }
  .search-btn:active::after, .control-btn:active::after, .topic-chip:active::after, .pdf-btn-header:active::after, .card-header:active::after {
    transform: scale(0);
    opacity: 0.3;
    transition: 0s;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .hero-title { font-size: 1.6rem; }
  .search-box { flex-direction: column; }
  .search-btn { width: 100%; }
  .topic-grid { grid-template-columns: 1fr 1fr; }
  .logo h1 { font-size: 1.05rem; }
  .pdf-btn-header { padding: 6px 10px; font-size: 0.8rem; }
}

@media (max-width: 400px) {
  .topic-grid { grid-template-columns: 1fr; }
}