/* ═══════════════════════════════════════════════════════════
   WebTools — Complete Design System
   ═══════════════════════════════════════════════════════════ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ── Variables ────────────────────────────────────────────── */
:root {
  --primary: #4F46E5;
  --primary-light: #818CF8;
  --primary-dark: #3730A3;
  --primary-50: #EEF2FF;
  --primary-100: #E0E7FF;
  --accent: #06B6D4;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --surface-alt: #F1F5F9;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --success: #10B981;
  --success-bg: #ECFDF5;
  --error: #EF4444;
  --error-bg: #FEF2F2;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.2s ease;
  --max-width: 1200px;
  --header-h: 70px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; }

/* ── Container ────────────────────────────────────────────── */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ═══════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════ */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo span { color: var(--primary); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--text-secondary);
  font-size: .9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav a:hover, .nav a.active { color: var(--primary); background: var(--primary-50); }
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}
.mobile-toggle svg { width: 24px; height: 24px; }

/* Mobile nav */
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    z-index: 999;
  }
  .nav.open { transform: translateY(0); }
  .nav a { width: 100%; padding: 12px 16px; font-size: 1rem; }
}

/* ═══════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════ */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
  color: #fff;
  padding: 80px 0 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 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='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; position: relative; margin-bottom: 16px; }
.hero p { font-size: clamp(1rem, 2vw, 1.2rem); opacity: .9; max-width: 640px; margin: 0 auto; position: relative; }
.hero-small { padding: 50px 0 55px; }
.hero-small h1 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 8px; }

/* ═══════════════════════════════════════════════════════════
   BREADCRUMB
   ═══════════════════════════════════════════════════════════ */
.breadcrumb {
  padding: 14px 0;
  font-size: .85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-light);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }

/* ═══════════════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════════════ */
.section { padding: 60px 0; }
.section-alt { background: var(--surface-alt); }
.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
}

/* ═══════════════════════════════════════════════════════════
   CARDS
   ═══════════════════════════════════════════════════════════ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  background: var(--primary-50);
}
.card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--text-secondary); font-size: .9rem; line-height: 1.6; margin-bottom: 16px; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--primary);
}
.card-link:hover { gap: 10px; }

/* Category cards */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.cat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
}
.cat-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.cat-card .icon { font-size: 2.2rem; margin-bottom: 10px; }
.cat-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.cat-card .count { font-size: .85rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════
   TOOL INTERFACE
   ═══════════════════════════════════════════════════════════ */
.tool-section { padding: 40px 0; }
.tool-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.tool-box h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Forms */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 140px; }
input[type="text"],
input[type="number"],
input[type="email"],
input[type="url"],
input[type="date"],
textarea,
select {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-size: .95rem;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.15);
}
textarea { resize: vertical; min-height: 120px; font-family: inherit; }

/* File upload */
.file-upload {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface-alt);
}
.file-upload:hover { border-color: var(--primary); background: var(--primary-50); }
.file-upload.dragover { border-color: var(--primary); background: var(--primary-50); }
.file-upload .icon { font-size: 2rem; margin-bottom: 8px; }
.file-upload p { color: var(--text-secondary); font-size: .9rem; }
.file-upload .hint { font-size: .8rem; color: var(--text-muted); margin-top: 4px; }
.file-upload input[type="file"] { display: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-alt); border-color: var(--text-muted); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-sm { padding: 8px 16px; font-size: .85rem; }

/* Result box */
.result-box {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
  display: none;
}
.result-box.show { display: block; animation: fadeIn 0.3s ease; }
.result-box h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 12px; color: var(--success); }
.result-item { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.result-item:last-child { border-bottom: none; }
.result-item .label { color: var(--text-secondary); font-size: .9rem; }
.result-item .value { font-weight: 600; font-size: .9rem; }
.result-text {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', monospace;
  font-size: .88rem;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 400px;
  overflow-y: auto;
}
.result-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

/* Loading */
.loading-overlay {
  position: relative;
  pointer-events: none;
  opacity: .7;
}
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast-container {
  position: fixed;
  top: calc(var(--header-h) + 12px);
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  box-shadow: var(--shadow-lg);
  font-size: .9rem;
  animation: slideIn 0.3s ease;
  max-width: 360px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--error); }
.toast.warning { border-left: 4px solid var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ═══════════════════════════════════════════════════════════
   CONTENT SECTIONS (How To, Benefits, FAQ, Related)
   ═══════════════════════════════════════════════════════════ */
.content-section { padding: 50px 0; }
.content-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}
.content-section p, .content-section li {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: .95rem;
}
.content-section ul { padding-left: 0; }
.content-section li { padding: 6px 0; padding-left: 24px; position: relative; }
.content-section li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}

/* Steps */
.steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; margin-top: 20px; }
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.step h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.step p { font-size: .88rem; color: var(--text-secondary); }

/* Benefits grid */
.benefits-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 20px; }
.benefit {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.benefit .icon { font-size: 1.4rem; flex-shrink: 0; }
.benefit h4 { font-size: .95rem; font-weight: 600; margin-bottom: 4px; }
.benefit p { font-size: .85rem; color: var(--text-secondary); }

/* FAQ */
.faq-list { margin-top: 16px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
}
.faq-q {
  padding: 16px 20px;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  transition: background var(--transition);
}
.faq-q:hover { background: var(--surface-alt); }
.faq-q .arrow { transition: transform 0.3s ease; font-size: .8rem; color: var(--text-muted); }
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 20px;
  background: var(--surface-alt);
  color: var(--text-secondary);
  font-size: .9rem;
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 500px; padding: 16px 20px; }

/* Related tools */
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin-top: 16px; }
.related-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.related-link:hover { border-color: var(--primary); color: var(--primary); transform: translateX(3px); }

/* ═══════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════ */
.footer {
  background: var(--text);
  color: #CBD5E1;
  padding: 60px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer p { font-size: .88rem; line-height: 1.7; }
.footer a { color: #94A3B8; font-size: .88rem; transition: color var(--transition); }
.footer a:hover { color: #fff; }
.footer ul li { margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid #334155;
  padding: 20px 0;
  margin-top: 40px;
  text-align: center;
  font-size: .82rem;
  color: #64748B;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 70px; }
  .tool-box { padding: 20px; }
  .form-row { flex-direction: column; gap: 0; }
  .section { padding: 40px 0; }
}

/* ═══════════════════════════════════════════════════════════
   PAGE SPECIFIC
   ═══════════════════════════════════════════════════════════ */
/* About / Privacy / Terms — rich text sections */
.prose { max-width: 800px; margin: 0 auto; }
.prose h2 { font-size: 1.4rem; font-weight: 700; margin: 32px 0 12px; }
.prose h3 { font-size: 1.15rem; font-weight: 600; margin: 24px 0 8px; }
.prose p { margin-bottom: 14px; color: var(--text-secondary); line-height: 1.8; }
.prose ul { padding-left: 20px; margin-bottom: 14px; }
.prose ul li { list-style: disc; color: var(--text-secondary); margin-bottom: 6px; }

/* Contact form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 768px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info-card {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
}
.contact-info-card .icon { font-size: 1.4rem; }
.contact-info-card h4 { font-size: .95rem; font-weight: 600; margin-bottom: 2px; }
.contact-info-card p { font-size: .88rem; color: var(--text-secondary); }

/* Image preview */
.image-preview {
  max-width: 100%;
  max-height: 300px;
  margin-top: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: none;
}
.image-preview.show { display: block; }

/* Stats bar */
.stats-bar {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 30px;
  position: relative;
}
.stat {
  text-align: center;
  padding: 0 20px;
}
.stat .num { font-size: 2rem; font-weight: 800; color: #fff; }
.stat .label { font-size: .85rem; opacity: .8; }

/* Utility */
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.hidden { display: none !important; }