/* ============================================
   CALCHUB - Complete Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=DM+Serif+Display:ital@0;1&display=swap');

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --success: #10b981;
  --danger: #ef4444;
  --text-dark: #0f172a;
  --text-mid: #334155;
  --text-light: #64748b;
  --text-muted: #94a3b8;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow: 0 4px 16px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.06);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font: 'Plus Jakarta Sans', sans-serif;
  --font-display: 'DM Serif Display', serif;
  --transition: all .2s cubic-bezier(.4,0,.2,1);
  --header-h: 68px;
}

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

html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }
input, select, textarea { font-family: var(--font); }

/* ---- HEADER ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  font-family: var(--font-display);
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}

.logo-text { font-size: 1.35rem; font-weight: 800; color: var(--text-dark); letter-spacing: -.3px; }
.logo-text span { color: var(--primary); }

.header-search {
  flex: 1;
  max-width: 480px;
  position: relative;
}

.header-search input {
  width: 100%;
  padding: 10px 16px 10px 42px;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: .9rem;
  color: var(--text-dark);
  background: var(--bg-soft);
  transition: var(--transition);
  outline: none;
}

.header-search input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.header-search .search-icon {
  position: absolute;
  left: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
  pointer-events: none;
}

.search-results-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0; right: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  max-height: 380px;
  overflow-y: auto;
  z-index: 999;
  display: none;
}

.search-results-dropdown.active { display: block; }

.search-result-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid var(--border-light);
}

.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-soft); }
.search-result-item .cat-badge { font-size: .7rem; padding: 2px 8px; border-radius: 20px; font-weight: 600; }
.search-result-item .tool-name { font-size: .9rem; font-weight: 500; flex: 1; }

.header-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-mid);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  margin-left: auto;
}

.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-dark); border-radius: 2px;
  transition: var(--transition);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h); left: 0; right: 0; bottom: 0;
  background: #fff;
  z-index: 999;
  overflow-y: auto;
  padding: 20px;
}

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

.mobile-nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 1rem; font-weight: 500;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.mobile-nav-link:hover { background: var(--primary-light); color: var(--primary); }

/* ---- MAIN LAYOUT ---- */
main { flex: 1; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 900px; margin: 0 auto; padding: 0 20px; }
.container-xs { max-width: 680px; margin: 0 auto; padding: 0 20px; }

/* ---- HERO (Homepage) ---- */
.hero {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fd 50%, #f0f9ff 100%);
  padding: 72px 20px 60px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(37,99,235,.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(ellipse, rgba(14,165,233,.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(37,99,235,.08);
  color: var(--primary);
  font-size: .8rem; font-weight: 700;
  letter-spacing: .5px; text-transform: uppercase;
  padding: 6px 16px; border-radius: 50px;
  margin-bottom: 20px;
  border: 1px solid rgba(37,99,235,.15);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.15;
  color: var(--text-dark);
  margin-bottom: 16px;
  position: relative; z-index: 1;
}

.hero h1 em { color: var(--primary); font-style: italic; }

.hero p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 32px;
  position: relative; z-index: 1;
}

.hero-stats {
  display: flex; align-items: center; justify-content: center; gap: 32px;
  flex-wrap: wrap;
  position: relative; z-index: 1;
}

.hero-stat { text-align: center; }
.hero-stat strong { display: block; font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.hero-stat span { font-size: .8rem; color: var(--text-light); font-weight: 500; }

.hero-search {
  max-width: 560px;
  margin: 0 auto 32px;
  position: relative; z-index: 1;
}

.hero-search input {
  width: 100%;
  padding: 16px 60px 16px 20px;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 1rem;
  background: #fff;
  outline: none;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.hero-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,.1), var(--shadow);
}

.hero-search button {
  position: absolute; right: 6px; top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  color: #fff; border-radius: 50px;
  padding: 10px 22px;
  font-size: .9rem; font-weight: 600;
  transition: var(--transition);
}

.hero-search button:hover { background: var(--primary-dark); }

/* ---- CATEGORY CHIPS ---- */
.cat-chips {
  display: flex; align-items: center; gap: 10px;
  padding: 20px 0; overflow-x: auto;
  scrollbar-width: none;
}
.cat-chips::-webkit-scrollbar { display: none; }

.cat-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: .85rem; font-weight: 600;
  color: var(--text-mid);
  white-space: nowrap;
  transition: var(--transition);
  cursor: pointer;
  background: #fff;
}

.cat-chip:hover, .cat-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37,99,235,.25);
}

.cat-chip span { font-size: 1rem; }

/* ---- CATEGORY COLORS ---- */
.health-color { --cat-color: #10b981; --cat-bg: #ecfdf5; }
.pregnancy-color { --cat-color: #ec4899; --cat-bg: #fdf2f8; }
.finance-color { --cat-color: #f59e0b; --cat-bg: #fffbeb; }
.realestate-color { --cat-color: #8b5cf6; --cat-bg: #f5f3ff; }

/* ---- SECTION ---- */
.section { padding: 56px 0; }
.section + .section { padding-top: 0; }

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px; flex-wrap: wrap; gap: 12px;
}

.section-title {
  font-size: 1.5rem; font-weight: 800;
  color: var(--text-dark);
  display: flex; align-items: center; gap: 10px;
}

.section-title .icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}

.view-all {
  font-size: .875rem; font-weight: 600;
  color: var(--primary); padding: 8px 16px;
  border: 1.5px solid var(--primary);
  border-radius: 50px;
  transition: var(--transition);
}

.view-all:hover { background: var(--primary); color: #fff; }

/* ---- CALCULATOR CARDS GRID ---- */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.calc-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column; gap: 12px;
}

.calc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.calc-card:hover {
  border-color: rgba(37,99,235,.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.calc-card:hover::before { opacity: 1; }

.calc-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  background: var(--primary-light);
  flex-shrink: 0;
}

.calc-card-meta { flex: 1; }
.calc-card-meta h3 { font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; line-height: 1.3; }
.calc-card-meta p { font-size: .82rem; color: var(--text-light); line-height: 1.5; }

.calc-card-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 8px; border-top: 1px solid var(--border-light);
}

.calc-badge {
  font-size: .72rem; font-weight: 700;
  padding: 3px 10px; border-radius: 20px;
  letter-spacing: .3px; text-transform: uppercase;
}

.calc-badge.health { background: #ecfdf5; color: #059669; }
.calc-badge.pregnancy { background: #fdf2f8; color: #db2777; }
.calc-badge.finance { background: #fffbeb; color: #d97706; }
.calc-badge.realestate { background: #f5f3ff; color: #7c3aed; }

.calc-arrow {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem;
  transition: var(--transition);
}

.calc-card:hover .calc-arrow {
  background: var(--primary);
  color: #fff;
}

/* ---- CALCULATOR TOOL PAGE ---- */
.tool-hero {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fd 100%);
  padding: 48px 20px 40px;
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; color: var(--text-muted);
  margin-bottom: 16px; flex-wrap: wrap;
}

.breadcrumb a { color: var(--text-light); font-weight: 500; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-dark); font-weight: 600; }

.tool-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.tool-hero p { font-size: 1rem; color: var(--text-light); max-width: 600px; }

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  padding: 40px 0;
  align-items: start;
}

/* ---- CALCULATOR WIDGET ---- */
.calc-widget {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.calc-widget-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  display: flex; align-items: center; gap: 12px;
}

.calc-widget-header h2 { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); }

.calc-widget-body { padding: 28px 24px; }

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: .875rem; font-weight: 600;
  color: var(--text-mid); margin-bottom: 8px;
}

.form-group .hint { font-weight: 400; color: var(--text-muted); font-size: .8rem; }

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: .95rem;
  color: var(--text-dark);
  background: var(--bg-soft);
  outline: none;
  transition: var(--transition);
  appearance: none;
}

.form-control:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.input-group { display: flex; gap: 0; }
.input-group .form-control { border-radius: var(--radius) 0 0 var(--radius); border-right: none; }
.input-group .input-addon {
  padding: 12px 14px;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .85rem; font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
  display: flex; align-items: center;
}

.radio-group { display: flex; gap: 10px; flex-wrap: wrap; }
.radio-option { display: flex; align-items: center; gap: 0; cursor: pointer; }
.radio-option input[type="radio"] { display: none; }
.radio-option label {
  padding: 9px 18px;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  font-size: .875rem; font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-mid);
  margin: 0;
}
.radio-option input[type="radio"]:checked + label {
  background: var(--primary); border-color: var(--primary);
  color: #fff; box-shadow: 0 2px 8px rgba(37,99,235,.3);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px;
  border-radius: 50px;
  font-size: .95rem; font-weight: 700;
  transition: var(--transition);
  cursor: pointer; border: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px rgba(37,99,235,.45);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent; color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover { background: var(--primary-light); }

.btn-full { width: 100%; }

.btn-reset {
  background: var(--bg-soft); color: var(--text-light);
  border: 1.5px solid var(--border);
  padding: 10px 20px; border-radius: 50px;
  font-size: .875rem; font-weight: 500;
}

.btn-reset:hover { background: var(--border); }

.calc-actions { display: flex; gap: 10px; margin-top: 8px; }
.calc-actions .btn-primary { flex: 1; }

/* ---- RESULTS BOX ---- */
.result-box {
  display: none;
  margin-top: 24px;
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fd 100%);
  border: 1.5px solid rgba(37,99,235,.2);
  border-radius: var(--radius-lg);
  padding: 24px;
  animation: fadeInUp .3s ease;
}

.result-box.show { display: block; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-main {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(37,99,235,.15);
  margin-bottom: 20px;
}

.result-label { font-size: .82rem; font-weight: 600; color: var(--text-light); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 6px; }
.result-value { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1; }
.result-unit { font-size: 1rem; font-weight: 500; color: var(--text-light); margin-top: 4px; }

.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.result-item { background: rgba(255,255,255,.7); border-radius: var(--radius); padding: 14px; text-align: center; }
.result-item .val { font-size: 1.3rem; font-weight: 700; color: var(--text-dark); }
.result-item .lbl { font-size: .78rem; color: var(--text-light); font-weight: 500; margin-top: 2px; }

.result-interpretation {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: .9rem; font-weight: 500;
  display: flex; align-items: flex-start; gap: 10px;
}

.result-interpretation.normal { background: #ecfdf5; color: #065f46; }
.result-interpretation.warning { background: #fffbeb; color: #92400e; }
.result-interpretation.danger { background: #fef2f2; color: #991b1b; }
.result-interpretation .icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* ---- SIDEBAR ---- */
.sidebar { display: flex; flex-direction: column; gap: 20px; }

.sidebar-widget {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.sidebar-widget-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}

.sidebar-widget-header h3 { font-size: .95rem; font-weight: 700; color: var(--text-dark); }
.sidebar-widget-body { padding: 16px 20px; }

.related-list { display: flex; flex-direction: column; gap: 4px; }

.related-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: .875rem; font-weight: 500;
  color: var(--text-mid);
  transition: var(--transition);
}

.related-item:hover { background: var(--primary-light); color: var(--primary); }
.related-item .icon { font-size: 1rem; flex-shrink: 0; }

/* ---- SHARE BAR ---- */
.share-bar {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.share-bar h3 { font-size: .9rem; font-weight: 700; color: var(--text-dark); margin-bottom: 14px; }

.share-buttons { display: flex; gap: 8px; flex-wrap: wrap; }

.share-btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  border-radius: 50px;
  font-size: .82rem; font-weight: 600;
  transition: var(--transition);
  cursor: pointer; border: none;
  text-decoration: none;
}

.share-btn.facebook { background: #1877f2; color: #fff; }
.share-btn.twitter { background: #000; color: #fff; }
.share-btn.whatsapp { background: #25d366; color: #fff; }
.share-btn.linkedin { background: #0a66c2; color: #fff; }
.share-btn.copy { background: var(--bg-soft); color: var(--text-mid); border: 1px solid var(--border); }
.share-btn:hover { opacity: .85; transform: translateY(-1px); }

/* ---- ARTICLE / INFO CONTENT ---- */
.article-content { line-height: 1.85; }
.article-content h2 { font-size: 1.4rem; font-weight: 800; color: var(--text-dark); margin: 36px 0 14px; padding-top: 20px; border-top: 1px solid var(--border-light); }
.article-content h2:first-child { border-top: none; margin-top: 0; }
.article-content h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-dark); margin: 24px 0 10px; }
.article-content p { color: var(--text-mid); margin-bottom: 16px; font-size: .95rem; }
.article-content ul, .article-content ol { margin: 12px 0 16px 20px; color: var(--text-mid); font-size: .95rem; }
.article-content li { margin-bottom: 8px; line-height: 1.7; }
.article-content strong { color: var(--text-dark); }

.info-box {
  background: var(--primary-light);
  border: 1px solid rgba(37,99,235,.2);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 16px 20px; margin: 20px 0;
  font-size: .9rem; color: var(--text-mid);
}

.formula-box {
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 20px; margin: 20px 0;
  font-family: 'Courier New', monospace;
  font-size: .9rem; color: var(--text-dark);
  overflow-x: auto;
}

/* ---- FAQ ---- */
.faq { padding: 40px 0; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
  width: 100%; text-align: left;
  padding: 18px 0;
  font-size: .95rem; font-weight: 600;
  color: var(--text-dark);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  cursor: pointer; background: none; border: none; font-family: var(--font);
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question .toggle { font-size: 1.2rem; flex-shrink: 0; transition: var(--transition); }
.faq-item.open .faq-question .toggle { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 0 18px; font-size: .9rem; color: var(--text-light); line-height: 1.8; }
.faq-item.open .faq-answer { display: block; }

/* ---- TABLE ---- */
.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; margin: 16px 0; }
.data-table th { background: var(--bg-soft); padding: 12px 16px; text-align: left; font-weight: 700; color: var(--text-dark); border-bottom: 2px solid var(--border); font-size: .8rem; text-transform: uppercase; letter-spacing: .3px; }
.data-table td { padding: 11px 16px; border-bottom: 1px solid var(--border-light); color: var(--text-mid); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-soft); }
.table-wrap { overflow-x: auto; border: 1.5px solid var(--border); border-radius: var(--radius); }

/* ---- FOOTER ---- */
.site-footer {
  background: var(--text-dark);
  color: #94a3b8;
  margin-top: auto;
}

.footer-top { padding: 56px 0 40px; }

.footer-grid {
  display: grid;
  grid-template-columns: 280px 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-icon { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.footer-brand p { font-size: .875rem; line-height: 1.7; margin-top: 14px; }

.footer-col-title { color: #fff; font-size: .875rem; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; letter-spacing: .5px; }

.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: .875rem; color: #94a3b8; transition: var(--transition); padding: 2px 0; }
.footer-links a:hover { color: #fff; }

.social-links { display: flex; gap: 10px; margin-top: 20px; }
.social-link {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: center;
  color: #94a3b8; font-size: .95rem;
  transition: var(--transition);
  text-decoration: none;
}
.social-link:hover { background: var(--primary); color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
}

.footer-bottom p { font-size: .82rem; }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { font-size: .82rem; color: #94a3b8; }
.footer-bottom-links a:hover { color: #fff; }

/* ---- STATIC PAGES ---- */
.page-hero {
  background: linear-gradient(135deg, #f0f7ff 0%, #e8f4fd 100%);
  padding: 56px 20px 48px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--text-dark); margin-bottom: 12px;
}

.page-hero p { font-size: 1rem; color: var(--text-light); max-width: 560px; margin: 0 auto; }

.page-content { padding: 56px 0; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-form .form-group { margin-bottom: 18px; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-info-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-info-item .icon { width: 44px; height: 44px; border-radius: var(--radius); background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.contact-info-item h4 { font-size: .9rem; font-weight: 700; margin-bottom: 4px; }
.contact-info-item p { font-size: .875rem; color: var(--text-light); }

/* ---- DISCLAIMER BANNER ---- */
.disclaimer-banner {
  background: #fffbeb; border: 1px solid #fde68a;
  padding: 12px 20px; text-align: center;
  font-size: .8rem; color: #92400e;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}

/* ---- AD SLOTS ---- */
.ad-slot {
  background: var(--bg-soft);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  min-height: 90px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: .8rem;
  margin: 20px 0;
  overflow: hidden;
}

.ad-slot-banner { min-height: 90px; }
.ad-slot-rectangle { min-height: 250px; }
.ad-slot-responsive { min-height: 90px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .tool-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .header-nav { display: none; }
  .header-search { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 48px 20px 40px; }
  .calc-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr; }
  .calc-actions { flex-direction: column; }
  .share-buttons { flex-direction: column; }
  .share-btn { justify-content: center; }
}

@media (max-width: 480px) {
  .calc-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .hero-stats { gap: 20px; }
  .container, .container-sm { padding: 0 16px; }
  .calc-widget-body { padding: 20px 16px; }
  .result-value { font-size: 2.2rem; }
}

/* ---- UTILITIES ---- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.d-none { display: none !important; }
.d-flex { display: flex; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.fw-700 { font-weight: 700; }
.text-primary { color: var(--primary); }
.text-light-color { color: var(--text-light); }
.bg-soft { background: var(--bg-soft); }

/* ---- PRINT ---- */
@media print {
  .site-header, .site-footer, .sidebar, .share-bar, .ad-slot { display: none !important; }
  .tool-layout { grid-template-columns: 1fr !important; }
}

/* ---- PROGRESS BAR ---- */
#progress-bar {
  position: fixed; top: 0; left: 0;
  height: 3px; background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 9999; width: 0; transition: width .1s;
}

/* ---- BACK TO TOP ---- */
#back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px;
  background: var(--primary); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 16px rgba(37,99,235,.4);
  cursor: pointer; transition: var(--transition);
  opacity: 0; pointer-events: none; border: none;
}

#back-to-top.visible { opacity: 1; pointer-events: all; }
#back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ---- COOKIE BANNER ---- */
#cookie-banner {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--text-dark); color: #e2e8f0;
  padding: 16px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  z-index: 9999; flex-wrap: wrap;
  font-size: .875rem;
  transform: translateY(100%);
  transition: transform .3s ease;
}

#cookie-banner.show { transform: translateY(0); }
#cookie-banner a { color: #93c5fd; }
#cookie-banner-accept {
  background: var(--primary); color: #fff;
  padding: 9px 22px; border-radius: 50px;
  font-size: .875rem; font-weight: 600;
  cursor: pointer; border: none; white-space: nowrap;
}

/* ---- NOTIFICATION ---- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--text-dark); color: #fff;
  padding: 12px 20px; border-radius: 50px;
  font-size: .875rem; font-weight: 500;
  box-shadow: var(--shadow-lg);
  transition: transform .3s ease;
  z-index: 9999; white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ---- SKELETON LOADER ---- */
.skeleton {
  background: linear-gradient(90deg, #f0f4f8 25%, #e8ecf0 50%, #f0f4f8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius);
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}