/* === Design Tokens === */
:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --primary: #6c5ce7;
  --primary-hover: #5a4bd1;
  --card-bg: #ffffff;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.08);
  --card-hover-shadow: 0 8px 30px rgba(0,0,0,0.12);
  --border: #e5e7eb;
  --tag-bg: #f0eefb;
  --tag-text: #6c5ce7;
  --star-color: #f59e0b;
  --rating-bg: #fef3c7;
  --modal-overlay: rgba(0,0,0,0.5);
  --header-bg: rgba(255,255,255,0.9);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0f0f23;
  --bg-secondary: #1a1a2e;
  --text: #e4e4e7;
  --text-secondary: #9ca3af;
  --primary: #a78bfa;
  --primary-hover: #c4b5fd;
  --card-bg: #1a1a2e;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --card-hover-shadow: 0 8px 30px rgba(0,0,0,0.5);
  --border: #2d2d4a;
  --tag-bg: #2d2d4a;
  --tag-text: #a78bfa;
  --star-color: #fbbf24;
  --rating-bg: #3d3520;
  --modal-overlay: rgba(0,0,0,0.7);
  --header-bg: rgba(15,15,35,0.9);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Header === */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--header-bg); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.logo:hover { text-decoration: none; }
.header-nav { display: flex; align-items: center; gap: 16px; }
.header-nav a { font-size: 0.9rem; color: var(--text-secondary); }
.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 6px 10px; cursor: pointer; font-size: 1.1rem; line-height: 1;
}

/* === Hero === */
.hero { text-align: center; padding: 60px 0 32px; }
.hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 12px; }
.hero-subtitle { font-size: 1.15rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto 24px; }
.search-bar { position: relative; max-width: 520px; margin: 0 auto; }
.search-bar input {
  width: 100%; padding: 14px 48px 14px 20px; font-size: 1rem;
  background: var(--bg-secondary); border: 2px solid var(--border);
  border-radius: 50px; color: var(--text); outline: none; transition: border var(--transition);
}
.search-bar input:focus { border-color: var(--primary); }
.search-icon { position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 1.1rem; }

/* === Category Filters === */
.category-filters {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  padding: 0 0 24px;
}
.cat-btn {
  padding: 8px 16px; border-radius: 50px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text-secondary); cursor: pointer;
  font-size: 0.85rem; font-weight: 500; transition: all var(--transition);
}
.cat-btn:hover { border-color: var(--primary); color: var(--primary); }
.cat-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* === Sort Bar === */
.sort-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0 0 16px; font-size: 0.85rem; color: var(--text-secondary);
}
.sort-options { display: flex; align-items: center; gap: 8px; }
.sort-options select {
  padding: 6px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 0.85rem; cursor: pointer;
}

/* === Tools Grid === */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; padding: 0 0 40px;
}
.tool-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; cursor: pointer;
  box-shadow: var(--card-shadow); transition: all var(--transition);
}
.tool-card:hover {
  box-shadow: var(--card-hover-shadow); transform: translateY(-2px);
  border-color: var(--primary); text-decoration: none; color: inherit;
}
.tool-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.tool-card-name { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.tool-card-rating {
  display: flex; align-items: center; gap: 4px; font-size: 0.85rem; font-weight: 600;
  background: var(--rating-bg); color: var(--star-color); padding: 4px 8px; border-radius: var(--radius-sm);
  white-space: nowrap;
}
.tool-card-tagline { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 10px; line-height: 1.4; }
.tool-card-category {
  display: inline-block; font-size: 0.75rem; padding: 3px 10px;
  background: var(--tag-bg); color: var(--tag-text); border-radius: 50px;
  font-weight: 500; margin-bottom: 8px;
}
.tool-card-features { display: flex; flex-wrap: wrap; gap: 6px; }
.tool-card-features span {
  font-size: 0.75rem; color: var(--text-secondary); background: var(--bg-secondary);
  padding: 4px 8px; border-radius: var(--radius-sm);
}
.tool-card-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border);
}
.tool-card-pricing { font-size: 0.8rem; font-weight: 600; color: var(--primary); }
.tool-card-stars { font-size: 0.75rem; color: var(--text-secondary); }

/* === Pagination === */
.pagination { display: flex; justify-content: center; gap: 8px; padding: 0 0 40px; }
.page-btn {
  padding: 8px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg); color: var(--text); cursor: pointer; font-size: 0.85rem; transition: all var(--transition);
}
.page-btn:hover { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.page-btn:disabled { opacity: 0.4; cursor: default; }

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--border); padding: 24px 0; margin-top: 20px;
}
.site-footer .container { display: flex; justify-content: space-between; align-items: center; }
.site-footer p { font-size: 0.85rem; color: var(--text-secondary); }
.site-footer nav { display: flex; gap: 16px; }
.site-footer a { font-size: 0.85rem; color: var(--text-secondary); }

/* === Modal === */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: var(--modal-overlay); align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-content {
  background: var(--card-bg); border-radius: var(--radius); max-width: 700px;
  width: 100%; max-height: 85vh; overflow-y: auto; padding: 32px;
  position: relative; box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.modal-close {
  position: absolute; top: 16px; right: 16px; background: none; border: none;
  font-size: 1.5rem; cursor: pointer; color: var(--text-secondary); line-height: 1;
}
.modal-close:hover { color: var(--text); }

.modal-tool-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }
.modal-tool-header h2 { font-size: 1.5rem; }
.modal-rating-badge {
  font-size: 1rem; font-weight: 700; color: var(--star-color); background: var(--rating-bg);
  padding: 6px 14px; border-radius: var(--radius-sm); white-space: nowrap;
}
.modal-tagline { color: var(--text-secondary); margin-bottom: 16px; font-size: 1rem; }
.modal-description { margin-bottom: 20px; line-height: 1.7; }
.modal-meta {
  display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px;
}
.modal-meta-item {
  display: flex; align-items: center; gap: 6px; font-size: 0.85rem;
  background: var(--bg-secondary); padding: 8px 14px; border-radius: var(--radius-sm);
}
.modal-section { margin-bottom: 16px; }
.modal-section h3 { font-size: 1rem; margin-bottom: 8px; color: var(--primary); }
.modal-section ul { list-style: none; padding: 0; }
.modal-section ul li { padding: 6px 0; font-size: 0.9rem; border-bottom: 1px solid var(--border); }
.modal-section ul li:last-child { border-bottom: none; }
.modal-section ul li::before { content: "• "; color: var(--primary); font-weight: 700; }
.pros-list li::before { content: "✅ "; }
.cons-list li::before { content: "❌ "; }
.tips-list li::before { content: "💡 "; }
.modal-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.9rem; text-decoration: none; transition: all var(--transition);
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); text-decoration: none; }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: none; }
.btn-outline:hover { background: var(--primary); color: #fff; text-decoration: none; }

/* === Loading & Empty State === */
.loading, .empty-state { text-align: center; padding: 60px 20px; grid-column: 1 / -1; }
.loading { color: var(--text-secondary); font-size: 1.1rem; }
.empty-state h3 { font-size: 1.25rem; margin-bottom: 8px; }
.empty-state p { color: var(--text-secondary); }

/* === Responsive === */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.8rem; }
  .hero { padding: 40px 0 24px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
  .modal-content { padding: 20px; }
  .sort-bar { flex-direction: column; gap: 8px; align-items: flex-start; }
  .site-footer .container { flex-direction: column; gap: 8px; text-align: center; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .cat-btn { font-size: 0.8rem; padding: 6px 12px; }
}