/* ============================================
   TOOLBOX — Micro-SaaS Tool Farm
   Shared Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-input: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-active: rgba(99, 102, 241, 0.5);
  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-muted: #55556a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --transition: all 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background gradient */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(139, 92, 246, 0.05), transparent);
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   Layout
   ============================================ */

.page-wrapper {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0 2.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.site-logo .icon {
  font-size: 1.4rem;
}

.site-nav {
  display: flex;
  gap: 0.25rem;
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.site-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

/* ============================================
   Tool Header
   ============================================ */

.tool-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.tool-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-glow);
  color: var(--accent-hover);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1rem;
  border: 1px solid rgba(99, 102, 241, 0.15);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tool-header h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tool-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Tool Card (Main Container)
   ============================================ */

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.tool-card + .tool-card {
  margin-top: 1.5rem;
}

/* ============================================
   Form Elements
   ============================================ */

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

input[type="text"],
input[type="number"],
input[type="url"],
input[type="email"],
textarea,
select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--border-active);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: 'Inter', monospace;
}

textarea.mono {
  font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.7;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238888a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-group {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

/* ============================================
   Output / Results Area
   ============================================ */

.output-area {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  position: relative;
}

.output-area pre {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
}

.output-label {
  position: absolute;
  top: -0.6rem;
  left: 1rem;
  background: var(--bg-secondary);
  padding: 0 0.5rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--bg-card-hover);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Inter', sans-serif;
}

.copy-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.copy-btn.copied {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

/* ============================================
   Options / Controls Row
   ============================================ */

.controls-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: end;
}

.controls-row .control-group {
  flex: 1;
  min-width: 150px;
}

.control-inline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Checkbox & Toggle */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.toggle-wrapper input[type="checkbox"] {
  width: 36px;
  height: 20px;
  appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 100px;
  position: relative;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-wrapper input[type="checkbox"]::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-secondary);
  top: 2px;
  left: 2px;
  transition: var(--transition);
}

.toggle-wrapper input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle-wrapper input[type="checkbox"]:checked::after {
  background: white;
  left: 18px;
}

/* Range slider */
input[type="range"] {
  width: 100%;
  height: 4px;
  appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* ============================================
   Stats / Info Bar
   ============================================ */

.stats-bar {
  display: flex;
  gap: 2rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   Ad Zones
   ============================================ */

.ad-zone {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1px dashed rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-zone-top { margin-bottom: 2rem; }
.ad-zone-bottom { margin-top: 3rem; }
.ad-zone-sidebar { margin-top: 1.5rem; }

/* ============================================
   Related Tools
   ============================================ */

.related-tools {
  margin-top: 3rem;
}

.related-tools h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.related-grid a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.related-grid a:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.related-grid a .tool-icon {
  font-size: 1.2rem;
}

/* ============================================
   FAQ Section (SEO)
   ============================================ */

.faq-section {
  margin-top: 3rem;
}

.faq-section h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-item h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.faq-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.site-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--text-secondary);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.fade-in {
  animation: fadeIn 0.4s ease forwards;
}

.tool-card {
  animation: fadeIn 0.5s ease forwards;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 640px) {
  .page-wrapper {
    padding: 1.25rem 1rem 3rem;
  }

  .tool-header h1 {
    font-size: 1.6rem;
  }

  .tool-card {
    padding: 1.25rem;
  }

  .controls-row {
    flex-direction: column;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }

  .stats-bar {
    gap: 1rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-1 { gap: 0.5rem; }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--text-muted); }
.text-mono { font-family: 'SF Mono', 'Fira Code', monospace; }
.hidden { display: none; }
.w-full { width: 100%; }