/* FontPair - Modern Vanilla CSS Design System */

:root {
  --bg-color: #0d0f12;
  --bg-surface-950: #0b0c10;
  --bg-surface-900: #111319;
  --bg-surface-800: #161920;
  --border-color: #1f2937;
  --border-hover: #374151;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --brand-500: #3b82f6;
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-800);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* Header & Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  backdrop-filter: blur(12px);
  background-color: rgba(11, 12, 16, 0.85);
  border-bottom: 1px solid var(--border-color);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: #fff;
  transition: transform 0.2s;
}
.brand-logo:hover {
  transform: scale(1.02);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand-600), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover, .nav-link.active {
  color: #fff;
  background-color: rgba(22, 25, 32, 0.8);
}
.nav-link-generator {
  color: #93c5fd;
  background-color: rgba(59, 130, 246, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon-text {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background-color: var(--bg-surface-900);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-icon-text:hover {
  border-color: var(--border-hover);
  background-color: var(--bg-surface-800);
}

.badge-count {
  background-color: var(--accent-rose);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
}

/* Layout Main Container */
.main-container {
  flex: 1;
  width: 100%;
}

.section-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 4rem 1.5rem 3rem;
  background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12), transparent 70%);
  border-bottom: 1px solid var(--border-color);
}
.hero-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background-color: var(--bg-surface-900);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 0.75rem;
  color: #60a5fa;
  font-weight: 600;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.03em;
}
.hero-title-gradient {
  background: linear-gradient(135deg, #60a5fa, var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}
.btn-primary {
  padding: 0.8rem 1.6rem;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}
.btn-secondary {
  padding: 0.8rem 1.6rem;
  background-color: var(--bg-surface-900);
  border: 1px solid var(--border-color);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  transition: background 0.2s, border 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-secondary:hover {
  background-color: var(--bg-surface-800);
  border-color: var(--border-hover);
}

/* Grid Layout with Control Drawer Sidebar */
.playground-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}
@media (min-width: 1024px) {
  .playground-grid {
    grid-template-columns: 320px 1fr;
  }
}

/* Typography Control Panel Drawer */
.controls-panel {
  background-color: var(--bg-surface-900);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  position: sticky;
  top: 80px;
}
.controls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}
.controls-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.control-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}
.control-value {
  font-family: var(--font-mono);
  color: #fff;
}

.text-input, .select-input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background-color: var(--bg-surface-950);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border 0.2s;
}
.text-input:focus, .select-input:focus {
  border-color: var(--brand-500);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--brand-500);
  background: var(--bg-surface-950);
  height: 6px;
  border-radius: 4px;
}

/* Pairing Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card-pairing {
  background-color: rgba(17, 19, 25, 0.9);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: border 0.2s, transform 0.2s, box-shadow 0.2s;
}
.card-pairing:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(31, 41, 55, 0.7);
}
.card-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: #60a5fa;
  background-color: rgba(59, 130, 246, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(59, 130, 246, 0.2);
}
.card-fonts-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
}

.card-preview-box {
  padding: 1rem 0;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
}
.preview-heading {
  color: #fff;
  line-height: 1.15;
  word-break: break-word;
}
.preview-body {
  color: #d1d5db;
  line-height: 1.5;
}

.card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
}
.btn-card-action {
  padding: 0.45rem 0.75rem;
  background-color: var(--bg-surface-950);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s;
}
.btn-card-action:hover {
  color: #fff;
  border-color: var(--border-hover);
  background-color: var(--bg-surface-800);
}
.btn-card-action.btn-use {
  color: #93c5fd;
  background-color: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.3);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.modal-content {
  background-color: var(--bg-surface-900);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
}
.modal-header {
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-surface-950);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}
.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-height: 75vh;
  overflow-y: auto;
}
.code-block {
  background-color: var(--bg-surface-950);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #d1d5db;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Footer */
.footer {
  background-color: var(--bg-surface-950);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 4rem 1.5rem 2rem;
  margin-top: 4rem;
}
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-size: 0.85rem;
}
.footer-links a:hover {
  color: #fff;
}
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid rgba(31, 41, 55, 0.6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  flex-wrap: wrap;
  gap: 1rem;
}