/* ============================================
   BuildTools - Construction & Renovation Tools
   build.qtool.io
   ============================================ */

/* CSS Custom Properties */
:root {
  --bg-primary: #f8f6f3;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f0ede8;
  --bg-nav: rgba(255, 255, 255, 0.95);
  --bg-hero: linear-gradient(135deg, #d97706 0%, #b45309 50%, #92400e 100%);
  --bg-accent: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  --text-primary: #1c1917;
  --text-secondary: #57534e;
  --text-muted: #a8a29e;
  --text-on-accent: #ffffff;
  --border-color: #e7e5e4;
  --border-input: #d6d3d1;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);
  --accent: #d97706;
  --accent-hover: #b45309;
  --accent-light: rgba(217, 119, 6, 0.1);
  --success: #16a34a;
  --success-light: rgba(22, 163, 74, 0.1);
  --warning: #ea580c;
  --warning-light: rgba(234, 88, 12, 0.1);
  --danger: #dc2626;
  --danger-light: rgba(220, 38, 38, 0.1);
  --info: #2563eb;
  --info-light: rgba(37, 99, 235, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

[data-theme="dark"] {
  --bg-primary: #0c0a09;
  --bg-secondary: #1c1917;
  --bg-card: #292524;
  --bg-input: #292524;
  --bg-nav: rgba(12, 10, 9, 0.95);
  --bg-hero: linear-gradient(135deg, #78350f 0%, #451a03 100%);
  --text-primary: #fafaf9;
  --text-secondary: #d6d3d1;
  --text-muted: #78716c;
  --border-color: #44403c;
  --border-input: #57534e;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3);
  --accent-light: rgba(245, 158, 11, 0.15);
  --success-light: rgba(22, 163, 74, 0.15);
  --warning-light: rgba(234, 88, 12, 0.15);
  --danger-light: rgba(220, 38, 38, 0.15);
  --info-light: rgba(37, 99, 235, 0.15);
}

/* Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }

/* Navigation */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--bg-nav);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 2rem; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  transition: var(--transition);
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.2rem; color: var(--text-primary);
}
.nav-brand svg { width: 28px; height: 28px; }
.nav-links {
  display: flex; align-items: center; gap: 4px; list-style: none;
  margin-left: auto;
}
.nav-links a {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.875rem; font-weight: 500;
  transition: var(--transition); white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--accent-light); color: var(--accent);
}
.nav-right { display: flex; align-items: center; gap: 12px; }

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-input); border: 1px solid var(--border-color);
  border-radius: 50%; width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--transition);
  color: var(--text-secondary); font-size: 1.1rem;
}
.theme-toggle:hover {
  background: var(--accent-light); color: var(--accent); border-color: var(--accent);
}

/* Mobile Menu */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.hamburger span {
  width: 24px; height: 2px; background: var(--text-primary);
  border-radius: 2px; transition: var(--transition);
}

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-btn {
  display: flex; align-items: center; gap: 4px;
  padding: 6px 10px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.8rem; font-weight: 500;
  cursor: pointer; transition: var(--transition);
  background: none; border: none; font-family: inherit;
}
.nav-dropdown-btn:hover { background: var(--accent-light); color: var(--accent); }
.nav-dropdown-menu {
  position: absolute; top: 100%; left: 0;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: 6px; min-width: 200px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: var(--transition); z-index: 100;
  max-height: 70vh; overflow-y: auto;
}
.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-dropdown-menu a {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.82rem;
}
.nav-dropdown-menu a:hover, .nav-dropdown-menu a.active { background: var(--accent-light); color: var(--accent); }
.nav-dropdown-menu a:first-of-type { margin-top: 2px; }

/* Main Content */
.main-content { padding-top: 64px; min-height: 100vh; }

/* Hero Section */
.hero {
  background: var(--bg-hero); padding: 4rem 2rem;
  text-align: center; position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M10 10h40v40H10z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.hero h1 {
  font-size: 2.5rem; font-weight: 800; color: #fff;
  margin-bottom: 1rem; letter-spacing: -0.02em;
}
.hero p {
  font-size: 1.15rem; color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem; line-height: 1.7;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255, 255, 255, 0.15); backdrop-filter: blur(10px);
  padding: 6px 16px; border-radius: 50px;
  font-size: 0.85rem; color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.5rem; border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
.container-sm { max-width: 800px; margin: 0 auto; padding: 2rem; }

/* Section Titles */
.section-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; color: var(--text-primary); }
.section-subtitle { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 2rem; }
.category-section { margin-bottom: 2.5rem; }
.category-header {
  display: flex; align-items: center; gap: 10px; margin-bottom: 1.25rem;
  padding-bottom: 0.75rem; border-bottom: 2px solid var(--border-color);
}
.category-icon {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.category-header h2 { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); }
.category-header .category-count {
  font-size: 0.75rem; font-weight: 600; color: var(--text-muted);
  background: var(--bg-input); padding: 2px 8px; border-radius: 50px;
  margin-left: auto;
}

/* Card Grid */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem;
}

/* Cards */
.card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 1.5rem;
  transition: var(--transition); position: relative;
}
.card:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--accent);
}
.card-link { display: block; color: inherit; }
.card-link:hover { color: inherit; }
.card-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 1rem;
  background: var(--accent-light); color: var(--accent);
}
.card-icon.green { background: var(--success-light); color: var(--success); }
.card-icon.orange { background: var(--warning-light); color: var(--warning); }
.card-icon.red { background: var(--danger-light); color: var(--danger); }
.card-icon.blue { background: var(--info-light); color: var(--info); }
.card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.card p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.5; }
.card-arrow {
  position: absolute; top: 1.5rem; right: 1.5rem;
  color: var(--text-muted); transition: var(--transition); font-size: 1.1rem;
}
.card:hover .card-arrow { color: var(--accent); transform: translateX(3px); }

/* Featured Section */
.featured {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem; margin-bottom: 3rem;
}
.featured-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: var(--transition); display: flex; gap: 1.25rem; align-items: flex-start;
}
.featured-card:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--accent);
}
.featured-icon {
  width: 56px; height: 56px; min-width: 56px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; background: var(--bg-accent); color: #fff;
}
.featured-text h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.35rem; }
.featured-text p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }

/* Calculator Page Layout */
.calc-page { padding-top: 64px; min-height: 100vh; }
.calc-header { background: var(--bg-hero); padding: 2.5rem 2rem; text-align: center; }
.calc-header h1 { font-size: 1.75rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.calc-header p { color: rgba(255, 255, 255, 0.8); font-size: 0.95rem; }
.calc-body {
  max-width: 900px; margin: -2rem auto 2rem; padding: 0 1.5rem;
  position: relative; z-index: 1;
  display: flex; flex-direction: column; gap: 2.5rem;
}
.calc-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); overflow: hidden;
  padding: 2rem;
}
.calc-form { padding: 0; }
.calc-results {
  background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 2rem;
}

/* Form Elements */
.form-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.25rem;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
  display: flex; align-items: center; gap: 6px;
}
.form-group label .info-icon { cursor: help; color: var(--text-muted); font-size: 0.8rem; }
.form-group input, .form-group select, .form-group textarea {
  padding: 10px 14px; border: 1px solid var(--border-input);
  border-radius: var(--radius-sm); background: var(--bg-input);
  color: var(--text-primary); font-size: 0.95rem; font-family: inherit;
  transition: var(--transition); outline: none; width: 100%;
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-muted); }
.form-group .input-prefix { position: relative; }
.form-group .input-prefix span {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 0.9rem; font-weight: 500;
}
.form-group .input-prefix input { padding-left: 32px; }
.form-group .input-suffix { position: relative; }
.form-group .input-suffix span {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 0.9rem;
}
.form-group .input-suffix input { padding-right: 36px; }
.form-group small { font-size: 0.75rem; color: var(--text-muted); }
.form-group .error-msg { color: var(--danger); font-size: 0.78rem; display: none; }
.form-group.has-error input { border-color: var(--danger); }
.form-group.has-error .error-msg { display: block; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 24px; border: none; border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.9rem; font-weight: 600;
  cursor: pointer; transition: var(--transition); outline: none;
}
.btn-primary { background: var(--bg-accent); color: #fff; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: var(--bg-input); color: var(--text-secondary); border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--accent-light); color: var(--accent); border-color: var(--accent);
}
.btn-group { display: flex; gap: 12px; margin-top: 1.5rem; }

/* Result Cards */
.result-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem;
}
.result-item {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 1.25rem; text-align: center;
  transition: var(--transition);
}
.result-item:hover { border-color: var(--accent); }
.result-item .result-label {
  display: block;
  font-size: 0.78rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 0.5rem;
}
.result-item .result-value {
  font-size: 1.35rem; font-weight: 700; color: var(--accent);
  word-break: break-all; overflow-wrap: break-word;
}
.result-item .result-value.green { color: var(--success); }
.result-item .result-value.red { color: var(--danger); }
.result-item .result-value.orange { color: var(--warning); }
.result-highlight { background: var(--accent-light); border-color: var(--accent); }
.result-highlight .result-value { font-size: 1.6rem; }

/* Formula Box */
.formula-box {
  background: var(--bg-input); border: 1px solid var(--border-color);
  border-radius: var(--radius-md); padding: 1rem 1.25rem; margin-top: 1.5rem;
}
.formula-box h4 {
  font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
  margin-bottom: 0.5rem; display: flex; align-items: center; gap: 6px;
}
.formula-box code {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent);
  background: var(--bg-card); padding: 2px 8px; border-radius: 4px;
}
.formula-box p { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.5rem; line-height: 1.5; }

/* Chart Container */
.chart-container {
  margin-top: 1.5rem; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: var(--radius-md);
  padding: 1.5rem; display: flex; align-items: center; justify-content: center;
  min-height: 250px;
}
.chart-container canvas { max-width: 100%; }
canvas { max-width: 100%; height: auto; }

/* Badge / Tag */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 50px; font-size: 0.75rem; font-weight: 600;
}
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--info); }

/* Tooltip */
.tooltip { position: relative; display: inline-flex; }
.tooltip::after {
  content: attr(data-tooltip); position: absolute; bottom: calc(100% + 8px);
  left: 50%; transform: translateX(-50%);
  background: var(--text-primary); color: var(--bg-primary);
  padding: 6px 12px; border-radius: var(--radius-sm);
  font-size: 0.75rem; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: var(--transition); z-index: 10;
}
.tooltip:hover::after { opacity: 1; }

/* Breakdown Table */
.breakdown-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.breakdown-table th, .breakdown-table td {
  padding: 10px 14px; text-align: left; font-size: 0.875rem;
  border-bottom: 1px solid var(--border-color);
}
.breakdown-table th {
  font-weight: 600; color: var(--text-muted); font-size: 0.78rem;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.breakdown-table td { color: var(--text-primary); }
.breakdown-table tr:last-child td { border-bottom: none; }
.breakdown-table tr:hover td { background: var(--accent-light); }

/* Mono output */
.mono-output {
  font-family: var(--font-mono); font-size: 0.85rem;
  background: var(--bg-input); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); padding: 12px 16px;
  word-break: break-all; line-height: 1.6; color: var(--accent);
  position: relative; user-select: all;
}
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  background: var(--accent-light); border: 1px solid var(--accent);
  color: var(--accent); border-radius: 6px; padding: 4px 10px;
  font-size: 0.75rem; cursor: pointer; transition: var(--transition);
  font-family: inherit; font-weight: 600;
}
.copy-btn:hover { background: var(--accent); color: #fff; }

/* Info Box */
.info-box {
  display: flex; gap: 12px; background: var(--info-light);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-md); padding: 1rem 1.25rem; margin: 1rem 0;
}
.info-box-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 1px; }
.info-box p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

/* Divider */
.divider { border: none; border-top: 1px solid var(--border-color); margin: 1.5rem 0; }

/* Footer */
.footer {
  background: var(--bg-secondary); border-top: 1px solid var(--border-color);
  padding: 2rem; text-align: center; margin-top: 3rem;
}
.footer p { font-size: 0.85rem; color: var(--text-muted); }
.footer a { color: var(--accent); font-weight: 500; }
.footer a:hover { text-decoration: underline; }

/* Tabs */
.tabs {
  display: flex; gap: 4px; background: var(--bg-input);
  padding: 4px; border-radius: var(--radius-sm); margin-bottom: 1.5rem;
  overflow-x: auto;
}
.tab-btn {
  padding: 8px 16px; border: none; background: transparent;
  border-radius: 6px; font-family: inherit; font-size: 0.85rem;
  font-weight: 500; color: var(--text-muted); cursor: pointer;
  transition: var(--transition); white-space: nowrap;
}
.tab-btn.active { background: var(--bg-card); color: var(--accent); box-shadow: var(--shadow-sm); }
.tab-btn:hover:not(.active) { color: var(--text-primary); }

/* Progress Bars */
.progress-bar-container { margin-top: 0.5rem; }
.progress-label { display: flex; justify-content: space-between; font-size: 0.82rem; margin-bottom: 4px; }
.progress-label span:first-child { color: var(--text-secondary); font-weight: 500; }
.progress-label span:last-child { color: var(--text-muted); }
.progress-bar { height: 8px; background: var(--bg-input); border-radius: 4px; overflow: hidden; margin-bottom: 0.75rem; }
.progress-fill { height: 100%; border-radius: 4px; transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1); background: var(--accent); }
.progress-fill.green { background: var(--success); }
.progress-fill.orange { background: var(--warning); }
.progress-fill.red { background: var(--danger); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Responsive */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg-nav); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column; padding: 1rem; gap: 2px; margin-left: 0;
  }
  .nav-links.open { display: flex; }
  .nav-dropdown-menu {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; padding-left: 1rem; background: transparent;
  }
  .hamburger { display: flex; }
  .hero h1 { font-size: 1.75rem; }
  .hero { padding: 3rem 1.5rem; }
  .container, .container-sm { padding: 1.5rem; }
  .calc-body { padding: 0 1rem; }
  .calc-card { padding: 1.5rem; }
  .calc-form, .calc-results { padding: 0; }
  .form-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .btn-group { flex-direction: column; }
  .btn { width: 100%; }
  .featured { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .result-grid { grid-template-columns: 1fr; }
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.4s ease forwards; }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.slide-up { animation: slideUp 0.5s ease forwards; }

/* Pie chart legend */
.chart-legend { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; justify-content: center; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* Checkbox labels */
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; color: var(--text-secondary); cursor: pointer; padding: 4px 0; }
.checkbox-label input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

/* Disclaimer */
.disclaimer-box {
  max-width: 900px; margin: 1.5rem auto 0; padding: 0 1.5rem;
  font-size: 0.8rem; color: var(--text-muted); line-height: 1.6;
  border-top: 1px solid var(--border-color); padding-top: 1rem;
}
.disclaimer-box strong { color: var(--warning); }

/* Cookie Banner */
.cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 9999;
  background: var(--bg-card); border-top: 1px solid var(--border-color);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  transform: translateY(100%); transition: transform 0.4s ease;
}
.cookie-banner.show { transform: translateY(0); }
.cookie-banner p {
  margin: 0; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; flex: 1;
}
.cookie-banner p a { color: var(--accent); text-decoration: underline; }
.cookie-banner-btn {
  padding: 8px 24px; border-radius: var(--radius-sm); border: none;
  background: var(--accent); color: #fff; font-size: 0.85rem; font-weight: 600;
  cursor: pointer; white-space: nowrap; transition: var(--transition);
}
.cookie-banner-btn:hover { opacity: 0.85; }
@media (max-width: 768px) {
  .cookie-banner { flex-direction: column; text-align: center; padding: 14px 16px; }
  .cookie-banner-btn { width: 100%; }
}

/* Quick Access Tabs (home page) */
.qa-bar {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 1.5rem;
}
.qa-tabs { display: flex; flex-wrap: wrap; gap: 8px; flex: 1; min-width: 0; }
.qa-tab {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 50px;
  border: 1px solid var(--border-color); background: var(--bg-card);
  color: var(--text-secondary); font-size: 0.82rem; font-weight: 500;
  font-family: inherit; cursor: pointer; transition: var(--transition);
}
.qa-tab:hover { border-color: var(--accent); color: var(--accent); }
.qa-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.qa-count {
  font-size: 0.7rem; font-weight: 700; padding: 1px 7px; border-radius: 50px;
  background: var(--bg-input); color: var(--text-muted);
}
.qa-tab.active .qa-count { background: rgba(0, 0, 0, 0.18); color: #fff; }
.qa-empty { color: var(--text-muted); font-size: 0.9rem; padding: 1.5rem 0; grid-column: 1 / -1; }
.qa-more {
  margin-top: 7px; font-size: 0.85rem; font-weight: 600; color: var(--accent);
  white-space: nowrap; flex-shrink: 0;
}
.qa-more:hover { text-decoration: underline; }

/* Favorite star on cards */
.card-fav {
  position: absolute; top: 1.3rem; right: 3.4rem;
  background: none; border: none; cursor: pointer;
  font-size: 1.1rem; line-height: 1; padding: 2px;
  color: var(--text-muted); opacity: 0.35; transition: var(--transition);
}
.card:hover .card-fav { opacity: 0.8; }
.card-fav:hover { opacity: 1; transform: scale(1.2); color: var(--warning); }
.card-fav.on { color: var(--warning); opacity: 1; }

/* Category page hero */
.cat-hero { background: var(--bg-hero); padding: 3.5rem 2rem 4.5rem; text-align: center; }
.cat-hero-icon {
  width: 64px; height: 64px; margin: 0 auto 1rem; border-radius: var(--radius-lg);
  background: var(--accent-light); display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
}
.cat-hero h1 { font-size: 1.9rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.cat-hero p { color: rgba(255, 255, 255, 0.8); font-size: 0.95rem; max-width: 560px; margin: 0 auto; }
.cat-grid-wrap {
  max-width: 1200px; margin: -2rem auto 3rem; padding: 0 1.5rem;
  position: relative; z-index: 1;
}

/* Category overview cards (categories.html) */
.cat-overview-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.25rem;
}
.cat-card {
  position: relative; display: flex; gap: 1rem; align-items: flex-start;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 1.5rem;
  color: inherit; transition: var(--transition);
}
.cat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.cat-card-icon {
  width: 48px; height: 48px; min-width: 48px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; font-size: 1.4rem;
  background: var(--accent-light); color: var(--accent);
}
.cat-card-icon.green { background: var(--success-light); color: var(--success); }
.cat-card-icon.orange { background: var(--warning-light); color: var(--warning); }
.cat-card-icon.red { background: var(--danger-light); color: var(--danger); }
.cat-card-icon.blue { background: var(--info-light); color: var(--info); }
.cat-card-text h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--text-primary); }
.cat-card-count {
  font-size: 0.7rem; font-weight: 600; color: var(--text-muted);
  background: var(--bg-input); padding: 2px 8px; border-radius: 50px;
  margin-left: 6px; vertical-align: middle;
}
.cat-card-text p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }

/* Other categories chips (category.html) */
.cat-others { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); }
.cat-others h3 { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 1rem; }
.cat-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 50px;
  border: 1px solid var(--border-color); background: var(--bg-card);
  color: var(--text-secondary); font-size: 0.82rem; font-weight: 500;
  transition: var(--transition);
}
.cat-chip:hover { border-color: var(--accent); color: var(--accent); }

/* All Tools table (home page) */
.tool-table-wrap {
  overflow-x: auto; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: var(--radius-lg);
}
.tool-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.tool-table th {
  text-align: left; font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-muted); padding: 0.75rem;
  border-bottom: 2px solid var(--border-color);
  background: var(--bg-secondary);
}
.tool-table td {
  padding: 0.7rem 0.75rem; border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem; color: var(--text-secondary); vertical-align: middle;
}
.tool-table tbody tr:last-child td { border-bottom: none; }
.tool-table tbody tr { transition: var(--transition); }
.tool-table tbody tr:hover { background: var(--accent-light); }
.tool-name { font-weight: 600; color: var(--text-primary); }
.tool-name:hover { color: var(--accent); }
td.tool-desc { color: var(--text-muted); font-size: 0.8rem; line-height: 1.45; }
.tool-fav-cell { width: 36px; text-align: center; }
th.tool-fav-cell { background: var(--bg-secondary); }
.row-fav {
  background: none; border: none; cursor: pointer;
  font-size: 1rem; line-height: 1; padding: 2px;
  color: var(--text-muted); opacity: 0.35; transition: var(--transition);
}
.row-fav:hover { opacity: 1; transform: scale(1.2); color: var(--warning); }
.row-fav.on { color: var(--warning); opacity: 1; }
.tool-cat-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.75rem; font-weight: 500; white-space: nowrap;
  padding: 3px 10px; border-radius: 50px;
  background: var(--bg-input); color: var(--text-secondary);
  transition: var(--transition);
}
.tool-cat-badge:hover { background: var(--accent-light); color: var(--accent); }