/* ============================================================
   Utilia — Global Stylesheet
   Font: DM Sans (loaded via Google Fonts in each page)
   Colors: --blue #0f6fff  --green #00c896  --dark #0d1117
   ============================================================ */

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

:root {
  --blue: #0f6fff;
  --blue-dark: #0a56cc;
  --green: #00c896;
  --dark: #0d1117;
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
  --shadow-md: 0 4px 24px rgba(0,0,0,.12);
  --transition: .18s ease;
  --max-w: 1140px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }
.page-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
  padding: 32px 0 64px;
}
@media (max-width: 900px) {
  .page-grid { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}

/* ---- Header ---- */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-300);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--dark);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -.3px;
}
.logo svg { flex-shrink: 0; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: var(--gray-700);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.site-nav a:hover { background: var(--gray-100); color: var(--blue); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--gray-700);
}
@media (max-width: 680px) {
  .site-nav { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-300); padding: 8px 16px 16px; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
}

/* ---- Breadcrumb ---- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: .83rem;
  color: var(--gray-500);
  padding: 12px 0 0;
}
.breadcrumb a { color: var(--blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--gray-300); }

/* ---- Tool Card ---- */
.tool-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.tool-card h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
  line-height: 1.25;
}
.tool-card .tool-desc {
  font-size: .95rem;
  color: var(--gray-500);
  margin-bottom: 24px;
}

/* ---- Form Elements ---- */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  color: var(--gray-900);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 48px;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(15,111,255,.15);
}
.form-group input[type="range"] {
  padding: 0;
  height: 6px;
  accent-color: var(--blue);
  min-height: unset;
  border: none;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 480px) { .form-row { grid-template-columns: 1fr; } }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  min-height: 48px;
  text-decoration: none;
}
.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 4px 16px rgba(15,111,255,.3);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1.5px solid var(--gray-300);
}
.btn-secondary:hover { background: var(--gray-300); }
.btn-group { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---- Results Panel ---- */
.results-panel {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8fff8 100%);
  border: 1.5px solid var(--blue);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 24px;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .35s ease, opacity .25s ease, margin .25s ease;
}
.results-panel.visible {
  max-height: 9999px;
  opacity: 1;
}
.results-panel h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .5px;
  font-size: .8rem;
}
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid rgba(15,111,255,.1);
}
.result-row:last-child { border-bottom: none; }
.result-label { font-size: .9rem; color: var(--gray-700); }
.result-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--blue);
}
.result-value.highlight {
  font-size: 1.6rem;
  color: var(--green);
}

/* ---- Ad Slots ---- */
.ad-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  border: 1px dashed var(--gray-300);
  border-radius: var(--radius-sm);
  color: var(--gray-500);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  overflow: hidden;
}
.ad-slot-inline { width: 100%; height: 280px; margin: 24px 0; }
.ad-slot-sidebar-300x250 { width: 300px; height: 250px; }
.ad-slot-sidebar-300x600 { width: 300px; height: 600px; }
@media (max-width: 900px) { .ad-slot-sidebar-300x600, .ad-slot-sidebar-300x250 { display: none; } }

/* ---- Content Sections ---- */
.content-section { margin: 40px 0; }
.content-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gray-100);
}
.content-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gray-900);
  margin: 20px 0 8px;
}
.content-section p { margin-bottom: 12px; color: var(--gray-700); line-height: 1.7; }
.content-section ul, .content-section ol {
  padding-left: 22px;
  margin-bottom: 12px;
  color: var(--gray-700);
}
.content-section li { margin-bottom: 6px; line-height: 1.65; }

/* ---- FAQ Accordion ---- */
.faq-section { margin: 40px 0; }
.faq-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
}
.faq-item {
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
  color: var(--gray-900);
  background: var(--white);
  border: none;
  width: 100%;
  text-align: left;
  gap: 12px;
  transition: background var(--transition);
  min-height: 48px;
}
.faq-question:hover { background: var(--gray-100); }
.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  color: var(--blue);
  transition: transform var(--transition), background var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--blue); color: var(--white); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 18px 16px;
  font-size: .93rem;
  color: var(--gray-700);
  line-height: 1.7;
}

/* ---- Embed & Cite Card ---- */
.share-card {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 20px;
  margin: 32px 0;
}
.share-card h3 { font-size: .95rem; font-weight: 700; margin-bottom: 12px; color: var(--gray-700); }
.share-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.share-tab {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: .83rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-700);
  transition: all var(--transition);
}
.share-tab.active { background: var(--blue); border-color: var(--blue); color: var(--white); }
.share-code-box {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: 'Courier New', monospace;
  font-size: .82rem;
  color: var(--gray-700);
  word-break: break-all;
  line-height: 1.5;
  max-height: 80px;
  overflow-y: auto;
}
.copy-btn {
  margin-top: 10px;
  padding: 8px 18px;
  font-size: .85rem;
  min-height: 36px;
}
.share-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

/* ---- Related Tools Grid ---- */
.related-tools { margin: 40px 0; }
.related-tools h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.tool-card-link {
  display: block;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-decoration: none;
  color: var(--gray-900);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.tool-card-link:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.tool-card-link .tool-icon { font-size: 1.5rem; margin-bottom: 8px; }
.tool-card-link .tool-name { font-size: .9rem; font-weight: 600; margin-bottom: 4px; }
.tool-card-link .tool-cat { font-size: .78rem; color: var(--gray-500); }

/* ---- Sidebar ---- */
.sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 80px; }
.sidebar-widget {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 18px;
}
.sidebar-widget h3 { font-size: .88rem; font-weight: 700; color: var(--gray-700); margin-bottom: 12px; text-transform: uppercase; letter-spacing: .5px; }
.sidebar-links { list-style: none; }
.sidebar-links li { border-bottom: 1px solid var(--gray-100); }
.sidebar-links li:last-child { border-bottom: none; }
.sidebar-links a {
  display: block;
  padding: 9px 0;
  font-size: .88rem;
  color: var(--blue);
  text-decoration: none;
  transition: color var(--transition);
}
.sidebar-links a:hover { color: var(--blue-dark); text-decoration: underline; }

/* ---- Homepage Hero ---- */
.hero {
  background: linear-gradient(135deg, #0d1117 0%, #1a2744 100%);
  padding: 64px 20px;
  text-align: center;
  color: var(--white);
}
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -.5px;
  line-height: 1.2;
}
.hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.75);
  max-width: 520px;
  margin: 0 auto 32px;
}
.search-wrapper {
  max-width: 580px;
  margin: 0 auto;
  position: relative;
}
.search-input {
  width: 100%;
  padding: 16px 56px 16px 20px;
  border-radius: 40px;
  border: none;
  font-size: 1.05rem;
  font-family: inherit;
  box-shadow: 0 4px 24px rgba(0,0,0,.25);
  outline: none;
  color: var(--gray-900);
}
.search-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-500);
  pointer-events: none;
  font-size: 1.1rem;
}
.search-results-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  z-index: 200;
  display: none;
}
.search-results-dropdown.open { display: block; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--gray-900);
  border-bottom: 1px solid var(--gray-100);
  transition: background var(--transition);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--gray-100); }
.search-result-item .result-cat { font-size: .78rem; color: var(--gray-500); }
.search-result-item .result-name { font-size: .93rem; font-weight: 600; }

/* ---- Category Grid ---- */
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px 16px;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--gray-900);
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.category-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.category-card .cat-icon { font-size: 2rem; }
.category-card .cat-name { font-weight: 700; font-size: .95rem; }
.category-card .cat-count { font-size: .8rem; color: var(--gray-500); }

/* ---- Footer ---- */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding: 40px 0 24px;
  font-size: .88rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .logo { color: var(--white); margin-bottom: 12px; }
.footer-brand p { font-size: .85rem; max-width: 260px; line-height: 1.65; }
.footer-col h4 { color: var(--white); font-weight: 700; margin-bottom: 12px; font-size: .9rem; text-transform: uppercase; letter-spacing: .5px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: rgba(255,255,255,.65); text-decoration: none; transition: color var(--transition); }
.footer-col ul a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .8rem;
  color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.5); text-decoration: none; }
.footer-bottom a:hover { color: var(--white); }

/* ---- Category Hub Page ---- */
.hub-hero {
  background: linear-gradient(135deg, var(--blue) 0%, #0a56cc 100%);
  padding: 48px 20px;
  color: var(--white);
  text-align: center;
}
.hub-hero h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; margin-bottom: 10px; }
.hub-hero p { font-size: 1.05rem; opacity: .85; max-width: 480px; margin: 0 auto; }

/* ---- Utilities ---- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.badge-blue { background: rgba(15,111,255,.12); color: var(--blue); }
.badge-green { background: rgba(0,200,150,.12); color: #00a07a; }