/* PDF-Yard - Core Design System */
@import url('https://fonts.googleapis.com/css2?family=Dancing+Script:wght@600;700&family=Great+Vibes&family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Pacifico&display=swap');

:root {
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  
  /* Vibrant Color Accents */
  --color-primary: #4F46E5;
  --color-primary-hover: #4338CA;
  --color-primary-light: #EEF2FF;
  --color-primary-glow: rgba(79, 70, 229, 0.25);
  
  --color-ruby: #E11D48;
  --color-ruby-light: #FFE4E6;
  --color-emerald: #10B981;
  --color-emerald-light: #D1FAE5;
  --color-amber: #F59E0B;
  --color-amber-light: #FEF3C7;
  --color-sky: #0EA5E9;
  --color-sky-light: #E0F2FE;
  --color-purple: #8B5CF6;
  --color-purple-light: #EDE9FE;
  
  /* Light Theme Defaults */
  --bg-body: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-card: rgba(255, 255, 255, 0.7);
  --bg-subtle: #F1F5F9;
  --bg-subtle-hover: #E2E8F0;
  
  --border-subtle: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-glass: rgba(255, 255, 255, 0.6);
  
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-subtle: #94A3B8;
  --text-inverse: #FFFFFF;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 25px var(--color-primary-glow);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-body: #090D16;
  --bg-surface: #111827;
  --bg-surface-elevated: #1F2937;
  --bg-glass: rgba(17, 24, 39, 0.85);
  --bg-glass-card: rgba(31, 41, 55, 0.6);
  --bg-subtle: #1E293B;
  --bg-subtle-hover: #334155;
  
  --border-subtle: #26334D;
  --border-medium: #374151;
  --border-glass: rgba(255, 255, 255, 0.08);
  
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --text-subtle: #64748B;
  
  --color-primary: #6366F1;
  --color-primary-hover: #4F46E5;
  --color-primary-light: rgba(99, 102, 241, 0.15);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Background Ambient Glow */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.ambient-circle-1 {
  position: absolute;
  top: -10%;
  left: 20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.12) 0%, rgba(79, 70, 229, 0) 70%);
  filter: blur(80px);
}
.ambient-circle-2 {
  position: absolute;
  top: 40%;
  right: -5%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(225, 29, 72, 0.08) 0%, rgba(225, 29, 72, 0) 70%);
  filter: blur(90px);
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  cursor: pointer;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--text-main) 30%, var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-search-wrapper {
  flex: 1;
  max-width: 420px;
  position: relative;
}

.nav-search-input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition-fast);
}

.nav-search-input:focus {
  border-color: var(--color-primary);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.nav-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  pointer-events: none;
}

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

/* Hero Section */
.hero-section {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3.5rem 1.5rem 2.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1rem;
}

.hero-gradient-text {
  background: linear-gradient(135deg, var(--color-primary), #ec4899, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* Category Filter Tabs */
.category-tabs-container {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding: 0 1.5rem 2rem;
  overflow-x: auto;
}

.category-tabs {
  display: flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  gap: 0.25rem;
}

.tab-btn {
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-pill);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tab-btn:hover {
  color: var(--text-main);
  background: var(--bg-subtle);
}

.tab-btn.active {
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--color-primary-glow);
}

/* Tools Grid */
.tools-section {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
  width: 100%;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--card-accent, var(--color-primary));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-xl);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.15rem;
  font-size: 1.5rem;
  background: var(--card-light-bg, var(--color-primary-light));
  color: var(--card-accent, var(--color-primary));
  transition: transform var(--transition-bounce);
}

.tool-card:hover .tool-icon-box {
  transform: scale(1.1) rotate(-3deg);
}

.tool-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  color: var(--text-muted);
}

.tool-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.tool-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Category Accent Styles */
.card-convert { --card-accent: #0EA5E9; --card-light-bg: #E0F2FE; }
.card-organize { --card-accent: #8B5CF6; --card-light-bg: #EDE9FE; }
.card-compress { --card-accent: #10B981; --card-light-bg: #D1FAE5; }
.card-edit { --card-accent: #E11D48; --card-light-bg: #FFE4E6; }
.card-security { --card-accent: #F59E0B; --card-light-bg: #FEF3C7; }

[data-theme="dark"] .card-convert { --card-light-bg: rgba(14, 165, 233, 0.15); }
[data-theme="dark"] .card-organize { --card-light-bg: rgba(139, 92, 246, 0.15); }
[data-theme="dark"] .card-compress { --card-light-bg: rgba(16, 185, 129, 0.15); }
[data-theme="dark"] .card-edit { --card-light-bg: rgba(225, 29, 72, 0.15); }
[data-theme="dark"] .card-security { --card-light-bg: rgba(245, 158, 11, 0.15); }

/* Footer */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .navbar {
    padding: 0.75rem 1rem;
  }
  .nav-search-wrapper {
    display: none;
  }
  .hero-title {
    font-size: 2rem;
  }
  .tools-section {
    padding: 0 1rem 3rem;
  }
}