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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header .logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-header .logo-img {
  height: 28px;
  width: auto;
}

.logo-dark { display: none; }

@media (prefers-color-scheme: dark) {
  .logo-light { display: none; }
  .logo-dark { display: block; }
}

.nav-desktop a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  margin-left: 16px;
}

.nav-desktop a:hover {
  color: var(--accent);
}

/* Hamburger button */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  gap: 5px;
  z-index: 201;
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.open .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav panel */
.nav-mobile {
  display: none;
  position: fixed;
  top: 53px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  z-index: 200;
  overflow-y: auto;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--border);
}

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

.nav-mobile-group {
  margin-bottom: 24px;
}

.nav-mobile-head {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.nav-mobile a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.nav-mobile a:hover {
  color: var(--accent);
}

/* Breadcrumb */
.breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb li::after {
  content: '/';
  margin-left: 6px;
  color: var(--text-muted);
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

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

/* Hero */
.hero-section {
  text-align: center;
  padding: 48px 20px 32px;
}

.hero-section h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.hero-section p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Tool wrapper */
.tool-wrapper {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 20px;
}

#text-input {
  width: 100%;
  font-size: 18px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

#text-input:focus {
  border-color: var(--accent);
}

#text-input::placeholder {
  color: var(--text-muted);
}

/* Filter tabs */
.filter-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px 0;
  scrollbar-width: none;
}

.filter-tabs::-webkit-scrollbar {
  display: none;
}

.filter-tab {
  flex-shrink: 0;
  padding: 6px 16px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.filter-tab:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Results grid */
#results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  padding: 8px 0 32px;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow 0.2s;
}

.result-card:hover {
  box-shadow: var(--shadow-sm);
}

.result-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.result-text {
  font-size: 18px;
  word-break: break-all;
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 48px;
  flex-grow: 1;
}

.copy-btn {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.2s;
}

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

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

/* FAQ */
.faq-section {
  max-width: 860px;
  margin: 48px auto;
  padding: 0 20px;
}

.faq-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.faq-q {
  width: 100%;
  text-align: left;
  padding: 16px 0;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-q::after {
  content: '+';
  font-size: 18px;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.faq-a {
  display: none;
  padding: 0 0 16px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.faq-a.open {
  display: block;
}

/* Related links */
.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 32px 0;
}

.related-link {
  padding: 6px 14px;
  border-radius: 99px;
  background: var(--accent-light);
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: opacity 0.2s;
}

.related-link:hover {
  opacity: 0.8;
}

/* Ad slots */
.ad-slot {
  min-height: 90px;
  background: var(--bg-2);
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 12px;
  border-radius: var(--radius-md);
  margin: 24px 0;
}

/* Footer */
.site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 48px 20px 24px;
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-top {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.footer-brand { flex: 0 0 200px; }
.footer-logo { font-size: 16px; font-weight: 700; color: var(--text-primary); }
.footer-tagline { font-size: 13px; color: var(--text-muted); margin-top: 8px; line-height: 1.5; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; flex: 1; }
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 120px;
}
.footer-col-head {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.footer-col a {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.footer-bottom a { color: var(--text-muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }
.footer-sep { opacity: 0.4; }

/* Static pages */
.static-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
.static-page h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.static-page h2 {
  font-size: 18px;
  font-weight: 500;
  margin: 32px 0 12px;
  color: var(--text-primary);
}
.static-page p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.static-page a {
  color: var(--accent);
  text-decoration: underline;
}
.legal-page { border-top: 2px solid var(--accent); padding-top: 32px; }
.legal-date { font-size: 13px; color: var(--text-muted); margin-bottom: 24px; }

/* Contact form */
.contact-form { margin: 28px 0; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--text-primary); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.submit-btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}
.submit-btn:hover { background: var(--accent-hover); }
.contact-note { font-size: 13px; color: var(--text-muted); margin-top: 20px; }

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 600px) {
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-links { gap: 28px; }

  .hero-section h1 {
    font-size: 24px;
  }

  .hero-section {
    padding: 32px 16px 24px;
  }

  #text-input {
    font-size: 16px;
    padding: 12px;
  }

  #results-grid {
    grid-template-columns: 1fr;
  }

  .result-text {
    font-size: 16px;
  }
}