/* ==========================================================================
   NissiTools - Main Design System & Layout
   Free Online Tools for Everyday Life
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-muted: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #2563eb;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;

  --accent: #06b6d4;
  --accent-hover: #0891b2;
  --accent-light: #ecfeff;

  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --info: #3b82f6;
  --info-light: #eff6ff;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.07);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.08);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition: 250ms ease;
  --transition-slow: 350ms ease;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;

  --ad-bg: #f8fafc;
  --ad-border: #cbd5e1;
  --ad-text: #64748b;

  --header-height: 72px;
  --max-width: 1280px;
}

[data-theme="dark"] {
  --bg-primary: #0b1329;
  --bg-secondary: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #24344d;
  --bg-muted: #1e293b;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: #172554;
  --primary-border: #1e3a8a;

  --accent: #22d3ee;
  --accent-hover: #67e8f9;
  --accent-light: #083344;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.5);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.6);

  --ad-bg: #0f172a;
  --ad-border: #1e293b;
  --ad-text: #64748b;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  height: var(--header-height);
  transition: background-color var(--transition), border-color var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--text-primary);
  letter-spacing: -0.025em;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1d4ed8, #2563eb, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.brand-text {
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  margin-left: 0.25rem;
  border: 1px solid var(--primary-border);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.925rem;
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background-color: var(--primary-light);
}

.nav-link.featured-link {
  color: #ffffff;
  background: linear-gradient(135deg, #2563eb, #0891b2);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.nav-link.featured-link:hover {
  background: linear-gradient(135deg, #1d4ed8, #0e7490);
  color: #ffffff;
}

/* Nav Dropdown */
.nav-item-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.5rem;
  min-width: 240px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.dropdown-item-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background-color: var(--bg-muted);
  color: var(--primary);
  flex-shrink: 0;
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.search-trigger-btn:hover {
  border-color: var(--primary);
  color: var(--text-secondary);
  background-color: var(--bg-card);
}

.search-shortcut {
  font-size: 0.7rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.theme-toggle-btn, .lang-select-btn, .mobile-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover, .lang-select-btn:hover, .mobile-toggle-btn:hover {
  color: var(--primary);
  background-color: var(--primary-light);
  border-color: var(--primary-border);
}

/* Language Dropdown */
.lang-selector {
  position: relative;
}

.lang-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  width: 140px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 0.35rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.lang-selector.active .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: left;
}

.lang-option:hover, .lang-option.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* Mobile Nav Drawer */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
  overflow-y: auto;
  z-index: 999;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-nav.open {
  display: flex;
}

.mobile-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 1.05rem;
  border: 1px solid var(--border-color);
}

.mobile-link:hover, .mobile-link.active {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

@media (max-width: 992px) {
  .nav-desktop {
    display: none;
  }
  .search-shortcut {
    display: none;
  }
}

@media (min-width: 993px) {
  .mobile-toggle-btn {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
  overflow: hidden;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-light);
  border: 1px solid var(--primary-border);
  color: var(--primary);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--primary);
  box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  max-width: 900px;
  margin: 0 auto 1.25rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 2.25rem;
  line-height: 1.6;
}

.hero-search-wrapper {
  max-width: 680px;
  margin: 0 auto 2rem;
  position: relative;
}

.hero-search-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 0.5rem 0.75rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
}

.hero-search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15), var(--shadow-lg);
}

.hero-search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.5rem 0.5rem;
  font-size: 1.05rem;
  color: var(--text-primary);
  outline: none;
}

.hero-search-btn {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.hero-search-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

/* Quick Search Suggestions */
.quick-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.quick-tag-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.quick-tag {
  font-size: 0.8rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.quick-tag:hover {
  color: var(--primary);
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #0369a1, #0891b2);
  color: #ffffff;
  transform: translateY(-2px);
}

/* ==========================================================================
   Featured House Plan Hero Card
   ========================================================================== */

.featured-banner {
  margin: 2.5rem 0 3.5rem;
}

.house-plan-feature-card {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #0e7490 100%);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
}

.house-plan-feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.25), transparent 50%);
  pointer-events: none;
}

.hp-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.hp-title {
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: #ffffff;
}

.hp-desc {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.hp-features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.hp-feature-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
}

.hp-feature-item svg {
  color: #38bdf8;
  flex-shrink: 0;
}

.hp-preview-box {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  backdrop-filter: blur(8px);
  position: relative;
}

.hp-mini-plan {
  width: 100%;
  height: 220px;
  background-color: #0b1329;
  border-radius: var(--radius);
  border: 1px dashed rgba(56, 189, 248, 0.4);
  position: relative;
  overflow: hidden;
}

@media (max-width: 868px) {
  .house-plan-feature-card {
    grid-template-columns: 1fr;
    padding: 1.75rem;
  }
}

/* ==========================================================================
   Tool Categories Grid
   ========================================================================== */

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.category-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-border);
}

.cat-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: transform var(--transition);
}

.category-card:hover .cat-icon-wrapper {
  transform: scale(1.08);
}

.cat-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cat-count {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-muted);
  color: var(--text-secondary);
}

.cat-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex: 1;
}

.cat-tools-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.cat-tool-pill {
  font-size: 0.75rem;
  background-color: var(--bg-muted);
  color: var(--text-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.cat-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}

/* Category Color Variants */
.cat-pdf .cat-icon-wrapper { background: #fee2e2; color: #dc2626; }
.cat-image .cat-icon-wrapper { background: #e0e7ff; color: #4f46e5; }
.cat-text .cat-icon-wrapper { background: #fef3c7; color: #d97706; }
.cat-calc .cat-icon-wrapper { background: #dcfce7; color: #16a34a; }
.cat-unit .cat-icon-wrapper { background: #ccfbf1; color: #0d9488; }
.cat-sign .cat-icon-wrapper { background: #f3e8ff; color: #9333ea; }
.cat-qr .cat-icon-wrapper { background: #fae8ff; color: #c026d3; }
.cat-dev .cat-icon-wrapper { background: #e0f2fe; color: #0284c7; }
.cat-social .cat-icon-wrapper { background: #ffe4e6; color: #e11d48; }
.cat-ai .cat-icon-wrapper { background: #ecfdf5; color: #059669; }
.cat-house .cat-icon-wrapper { background: #e0f2fe; color: #0369a1; }

[data-theme="dark"] .cat-pdf .cat-icon-wrapper { background: #7f1d1d; color: #fca5a5; }
[data-theme="dark"] .cat-image .cat-icon-wrapper { background: #312e81; color: #a5b4fc; }
[data-theme="dark"] .cat-text .cat-icon-wrapper { background: #78350f; color: #fde68a; }
[data-theme="dark"] .cat-calc .cat-icon-wrapper { background: #14532d; color: #86efac; }
[data-theme="dark"] .cat-unit .cat-icon-wrapper { background: #134e4a; color: #5eead4; }
[data-theme="dark"] .cat-sign .cat-icon-wrapper { background: #581c87; color: #d8b4fe; }
[data-theme="dark"] .cat-qr .cat-icon-wrapper { background: #701a75; color: #f0abfc; }
[data-theme="dark"] .cat-dev .cat-icon-wrapper { background: #0c4a6e; color: #7dd3fc; }
[data-theme="dark"] .cat-social .cat-icon-wrapper { background: #881337; color: #fda4af; }
[data-theme="dark"] .cat-ai .cat-icon-wrapper { background: #064e3b; color: #6ee7b7; }
[data-theme="dark"] .cat-house .cat-icon-wrapper { background: #082f49; color: #38bdf8; }

/* ==========================================================================
   Tool Cards Grid (for Tool Hub & Categories)
   ========================================================================== */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.tool-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.tool-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.tool-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.tool-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
  flex: 1;
}

.tool-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.7rem;
}

.badge-offline {
  background-color: var(--success-light);
  color: var(--success);
}

.badge-popular {
  background-color: var(--warning-light);
  color: #b45309;
}

.badge-new {
  background-color: var(--info-light);
  color: var(--info);
}

/* ==========================================================================
   Advertisement Slots (AdSense Compliant)
   ========================================================================== */

.ad-container {
  margin: 2rem auto;
  text-align: center;
  max-width: 100%;
}

.ad-slot {
  background-color: var(--ad-bg);
  border: 1px dashed var(--ad-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  min-height: 90px;
  position: relative;
}

.ad-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ad-text);
  margin-bottom: 0.25rem;
}

.ad-leaderboard {
  max-width: 728px;
  min-height: 90px;
}

.ad-rectangle {
  max-width: 336px;
  min-height: 280px;
}

.ad-placeholder-text {
  font-size: 0.85rem;
  color: var(--ad-text);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  transition: background-color var(--transition), border-color var(--transition);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin: 1rem 0 1.5rem;
  line-height: 1.6;
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-social-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--bg-muted);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.footer-social-btn:hover {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-disclaimer-box {
  background-color: var(--bg-muted);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   Breadcrumbs & Page Header
   ========================================================================== */

.breadcrumb-nav {
  padding: 1.25rem 0 0.5rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb-item a {
  color: var(--text-secondary);
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.page-header {
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.page-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.page-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 800px;
}

/* ==========================================================================
   Search Modal
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 5rem 1rem 1rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.search-modal {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 640px;
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform var(--transition-fast);
}

.modal-backdrop.open .search-modal {
  transform: translateY(0);
}

.search-modal-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.search-modal-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
}

.search-modal-results {
  max-height: 400px;
  overflow-y: auto;
  padding: 0.5rem;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.search-result-item:hover, .search-result-item.selected {
  background-color: var(--primary-light);
  color: var(--primary);
}

.search-result-cat {
  font-size: 0.75rem;
  background-color: var(--bg-muted);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  margin-left: auto;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 280px;
  max-width: 420px;
  animation: slide-in 0.25s ease forwards;
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

@keyframes slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ==========================================================================
   Cookie Consent Banner
   ========================================================================== */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.25rem;
  box-shadow: var(--shadow-lg);
  z-index: 2500;
  display: none;
}

.cookie-banner.show {
  display: block;
}

.cookie-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.cookie-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 800px;
}

.cookie-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}