/* =========================================
   OzToGallon.com - Main Stylesheet
   Primary: #0F4C81 | Accent: #00B4D8 | Light: #F0F8FF
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,400&display=swap');

:root {
  --primary: #0F4C81;
  --primary-dark: #0a3561;
  --primary-light: #1a6ab5;
  --accent: #00B4D8;
  --accent-light: #48CAE4;
  --accent-dark: #0096c7;
  --bg: #F0F8FF;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --text-dark: #0d1f2d;
  --text-body: #2d4356;
  --text-muted: #5a7a92;
  --text-light: #8aacbe;
  --border: #d0e8f5;
  --border-light: #e8f4fc;
  --shadow-sm: 0 2px 8px rgba(15,76,129,0.08);
  --shadow-md: 0 4px 20px rgba(15,76,129,0.12);
  --shadow-lg: 0 8px 40px rgba(15,76,129,0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-display: 'Sora', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --transition: 0.22s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.7;
  -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(--accent-dark); }

h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  color: var(--text-dark);
  line-height: 1.25;
  font-weight: 700;
}

.container { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1340px; margin: 0 auto; padding: 0 20px; }

/* ---- SKIP LINK ---- */
.skip-link {
  position: absolute; top: -50px; left: 0; background: var(--primary);
  color: #fff; padding: 8px 16px; z-index: 9999; border-radius: 0 0 8px 0;
}
.skip-link:focus { top: 0; }

/* ---- NAVIGATION ---- */
.nav {
  position: sticky; top: 0; z-index: 900;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 16px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800; font-size: 1.25rem;
  color: var(--primary); white-space: nowrap;
}
.nav-logo svg { flex-shrink: 0; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  font-family: var(--font-display); font-size: 0.875rem; font-weight: 500;
  color: var(--text-body); padding: 7px 14px; border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-links a:hover { background: var(--bg); color: var(--primary); }
.nav-links a.active { color: var(--primary); background: rgba(15,76,129,0.07); }
.nav-cta {
  background: var(--primary); color: #fff !important;
  padding: 8px 18px !important; border-radius: var(--radius-sm);
}
.nav-cta:hover { background: var(--primary-dark) !important; color: #fff !important; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: all var(--transition); }
.mobile-menu {
  display: none; flex-direction: column; gap: 4px;
  padding: 12px 20px 16px; border-top: 1px solid var(--border-light);
  background: #fff;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-display); font-size: 0.9rem; font-weight: 500;
  color: var(--text-body); padding: 10px 12px; border-radius: var(--radius-sm);
}
.mobile-menu a:hover { background: var(--bg); color: var(--primary); }

/* ---- BREADCRUMB ---- */
.breadcrumb { padding: 12px 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; font-size: 0.82rem; }
.breadcrumb li { display: flex; align-items: center; gap: 6px; color: var(--text-muted); }
.breadcrumb li::after { content: '/'; color: var(--border); }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }

/* ---- HERO ---- */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--primary-light) 100%);
  padding: 56px 0 64px;
  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='0.03'%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-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: center; position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(0,180,216,0.18); color: var(--accent-light);
  border: 1px solid rgba(0,180,216,0.3); border-radius: 100px;
  font-size: 0.78rem; font-weight: 600; font-family: var(--font-display);
  padding: 5px 14px; margin-bottom: 18px; letter-spacing: 0.04em; text-transform: uppercase;
}
.hero h1 {
  color: #fff; font-size: clamp(1.9rem, 4vw, 2.9rem);
  font-weight: 800; margin-bottom: 18px; line-height: 1.18;
}
.hero h1 span { color: var(--accent-light); }
.hero-desc { color: rgba(255,255,255,0.82); font-size: 1.05rem; margin-bottom: 28px; max-width: 480px; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 18px;
}
.trust-item {
  display: flex; align-items: center; gap: 7px;
  color: rgba(255,255,255,0.75); font-size: 0.85rem; font-weight: 500;
}
.trust-icon { color: var(--accent-light); font-size: 1rem; }

/* ---- CONVERTER CARD ---- */
.converter-card {
  background: #fff; border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0,0,0,0.22);
  padding: 32px 28px;
  position: relative;
}
.converter-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: linear-gradient(90deg, var(--accent), var(--primary-light));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.converter-label {
  font-family: var(--font-display); font-size: 0.78rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.converter-input-wrap {
  position: relative; margin-bottom: 6px;
}
.converter-input {
  width: 100%; border: 2px solid var(--border); border-radius: var(--radius-md);
  padding: 14px 54px 14px 16px; font-size: 1.5rem; font-weight: 700;
  font-family: var(--font-display); color: var(--text-dark);
  background: var(--bg); transition: border-color var(--transition);
  outline: none;
}
.converter-input:focus { border-color: var(--accent); background: #fff; }
.input-unit {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  font-size: 0.85rem; font-weight: 600; color: var(--text-muted);
  font-family: var(--font-display);
}
.swap-btn {
  display: flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; background: var(--bg); border: 2px solid var(--border);
  border-radius: 50%; cursor: pointer; margin: 10px auto;
  transition: all var(--transition); font-size: 1.1rem;
}
.swap-btn:hover { background: var(--primary); border-color: var(--primary); color: #fff; transform: rotate(180deg); }
.converter-result-wrap {
  background: linear-gradient(135deg, rgba(0,180,216,0.06), rgba(15,76,129,0.06));
  border: 2px solid var(--border-light); border-radius: var(--radius-md);
  padding: 18px 16px; margin-top: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.result-value {
  font-size: 2rem; font-weight: 800; font-family: var(--font-display);
  color: var(--primary);
}
.result-unit { font-size: 1rem; color: var(--text-muted); font-weight: 500; }
.result-formula {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 4px;
}
.copy-btn {
  display: flex; align-items: center; gap: 7px;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--radius-sm); padding: 10px 16px;
  font-size: 0.82rem; font-weight: 600; font-family: var(--font-display);
  cursor: pointer; transition: all var(--transition); white-space: nowrap;
}
.copy-btn:hover { background: var(--primary-dark); }
.copy-btn.copied { background: #16a34a; }
.converter-precision {
  display: flex; align-items: center; gap: 10px; margin-top: 14px;
  font-size: 0.82rem; color: var(--text-muted); font-family: var(--font-display);
}
.precision-select {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 4px 8px; font-size: 0.82rem; font-family: var(--font-display);
  color: var(--text-body); background: var(--bg); outline: none;
}
.quick-picks {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px;
}
.quick-pick {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 100px; padding: 5px 13px; font-size: 0.8rem; font-weight: 500;
  color: var(--text-body); cursor: pointer; font-family: var(--font-display);
  transition: all var(--transition);
}
.quick-pick:hover { background: var(--primary); color: #fff; border-color: var(--primary); }



/* ---- TOC ---- */
.toc-section { padding: 32px 0; }
.toc-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); padding: 28px 32px;
  box-shadow: var(--shadow-sm);
}
.toc-title {
  font-family: var(--font-display); font-size: 1rem; font-weight: 700;
  color: var(--text-dark); margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.toc-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 6px;
}
.toc-link {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.875rem; color: var(--text-body); padding: 7px 10px;
  border-radius: var(--radius-sm); transition: all var(--transition);
}
.toc-link:hover { background: rgba(15,76,129,0.06); color: var(--primary); }
.toc-num { color: var(--accent); font-size: 0.75rem; font-weight: 700; font-family: var(--font-display); min-width: 20px; }

/* ---- CONTENT SECTIONS ---- */
.section { padding: 56px 0; }
.section-alt { background: var(--bg-white); }
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800;
  color: var(--text-dark); margin-bottom: 14px;
}
.section-sub {
  font-size: 1.05rem; color: var(--text-muted); max-width: 620px; margin-bottom: 36px;
}
.section-header { margin-bottom: 36px; }
.section-header .eyebrow {
  font-size: 0.78rem; font-weight: 700; color: var(--accent-dark);
  text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--font-display);
  margin-bottom: 8px;
}

/* ---- PROSE CONTENT ---- */
.prose { max-width: 760px; }
.prose p { margin-bottom: 16px; color: var(--text-body); }
.prose h2 { font-size: 1.5rem; margin: 36px 0 14px; color: var(--text-dark); scroll-margin-top: 80px; }
.prose h3 { font-size: 1.2rem; margin: 24px 0 10px; color: var(--text-dark); }
.prose ul, .prose ol { padding-left: 20px; margin-bottom: 16px; }
.prose li { margin-bottom: 6px; color: var(--text-body); }
.prose strong { color: var(--text-dark); font-weight: 600; }
.prose .highlight-box {
  background: linear-gradient(135deg, rgba(0,180,216,0.06), rgba(15,76,129,0.06));
  border-left: 4px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 20px; margin: 20px 0;
}
.prose .highlight-box p { margin: 0; }
.prose .formula-box {
  background: var(--primary); color: #fff; border-radius: var(--radius-md);
  padding: 22px 24px; text-align: center; margin: 24px 0; font-family: var(--font-display);
}
.prose .formula-box .formula-main { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.prose .formula-box .formula-sub { font-size: 0.9rem; opacity: 0.8; }

/* ---- CONVERSION GRID ---- */
.conversion-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px; margin-top: 24px;
}
.conv-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-md); padding: 16px; text-align: center;
  box-shadow: var(--shadow-sm); transition: all var(--transition); cursor: pointer;
}
.conv-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); transform: translateY(-2px); }
.conv-from { font-size: 0.85rem; color: var(--text-muted); font-family: var(--font-display); }
.conv-result { font-size: 1.4rem; font-weight: 800; color: var(--primary); font-family: var(--font-display); margin: 4px 0; }
.conv-label { font-size: 0.75rem; color: var(--text-light); }

/* ---- TABLES ---- */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); margin: 24px 0; }
table { width: 100%; border-collapse: collapse; background: #fff; font-size: 0.9rem; }
thead th {
  background: var(--primary); color: #fff; font-family: var(--font-display);
  font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 13px 16px; text-align: left; white-space: nowrap;
}
tbody tr { border-bottom: 1px solid var(--border-light); transition: background var(--transition); }
tbody tr:hover { background: rgba(0,180,216,0.03); }
tbody tr.highlight-row { background: rgba(0,180,216,0.06); font-weight: 600; }
tbody td { padding: 11px 16px; color: var(--text-body); }
tbody td:first-child { font-weight: 600; color: var(--text-dark); }
tfoot td {
  background: var(--bg); font-weight: 600; color: var(--text-dark);
  padding: 12px 16px; font-size: 0.85rem; border-top: 2px solid var(--border);
}

/* ---- INFO CARDS ---- */
.info-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; margin-top: 24px;
}
.info-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); padding: 24px;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
}
.info-card:hover { box-shadow: var(--shadow-md); }
.info-card-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 16px;
}
.info-card h3 { font-size: 1rem; margin-bottom: 8px; }
.info-card p { font-size: 0.875rem; color: var(--text-muted); }

/* ---- STAT CARDS ---- */
.stat-bar {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px; margin: 32px 0;
}
.stat-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg); padding: 24px 20px; text-align: center; color: #fff;
}
.stat-num { font-size: 2rem; font-weight: 800; font-family: var(--font-display); margin-bottom: 4px; }
.stat-desc { font-size: 0.82rem; opacity: 0.8; }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-md); margin-bottom: 10px;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.faq-question {
  width: 100%; background: none; border: none; text-align: left;
  padding: 18px 20px; cursor: pointer; display: flex; align-items: center;
  justify-content: space-between; gap: 12px;
  font-family: var(--font-display); font-size: 0.95rem; font-weight: 600;
  color: var(--text-dark); transition: background var(--transition);
}
.faq-question:hover { background: var(--bg); }
.faq-icon { color: var(--accent); font-size: 1.2rem; transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
}
.faq-answer-inner { padding: 0 20px 18px; font-size: 0.9rem; color: var(--text-body); line-height: 1.7; }
.faq-answer-inner p { margin-bottom: 8px; }
.faq-answer-inner p:last-child { margin: 0; }
.faq-item.open .faq-answer { max-height: 400px; }

/* ---- MISTAKES SECTION ---- */
.mistakes-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; margin-top: 24px;
}
.mistake-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-sm);
}
.mistake-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.72rem; font-weight: 700; font-family: var(--font-display);
  text-transform: uppercase; letter-spacing: 0.05em;
  padding: 3px 10px; border-radius: 100px; margin-bottom: 10px;
}
.mistake-badge.wrong { background: #fee2e2; color: #b91c1c; }
.mistake-badge.right { background: #dcfce7; color: #15803d; }
.mistake-card h4 { font-size: 0.95rem; margin-bottom: 6px; }
.mistake-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* ---- BOTTLE SIZE VISUAL ---- */
.bottle-grid {
  display: flex; flex-wrap: wrap; gap: 16px; margin-top: 24px; align-items: flex-end;
}
.bottle-item { text-align: center; }
.bottle-vis {
  background: linear-gradient(180deg, var(--accent-light), var(--accent));
  border-radius: 6px 6px 3px 3px; width: 52px; margin: 0 auto 8px;
  position: relative;
}
.bottle-vis::before {
  content: ''; position: absolute; top: -8px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 8px;
  background: linear-gradient(180deg, var(--accent-dark), var(--accent));
  border-radius: 3px 3px 0 0;
}
.bottle-fl { font-size: 0.75rem; font-weight: 700; font-family: var(--font-display); color: var(--text-dark); }
.bottle-gal { font-size: 0.68rem; color: var(--text-muted); }

/* ---- CONVERTERS ARCHIVE ---- */
.archive-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px; margin-top: 28px;
}
.archive-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); padding: 22px 20px;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  display: flex; flex-direction: column; gap: 8px;
}
.archive-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); transform: translateY(-2px); }
.archive-card-icon { font-size: 1.6rem; }
.archive-card h3 { font-size: 0.95rem; color: var(--text-dark); }
.archive-card p { font-size: 0.82rem; color: var(--text-muted); flex: 1; }
.archive-card .coming-soon {
  font-size: 0.72rem; font-weight: 700; color: var(--accent-dark);
  background: rgba(0,180,216,0.1); padding: 3px 9px; border-radius: 100px;
  display: inline-block; font-family: var(--font-display); text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- BLOG ARCHIVE ---- */
.blog-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px; margin-top: 28px;
}
.blog-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.blog-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.blog-card-img {
  height: 160px; background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center; font-size: 2.5rem;
}
.blog-card-body { padding: 18px; }
.blog-cat {
  font-size: 0.72rem; font-weight: 700; color: var(--accent-dark);
  text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-display);
  margin-bottom: 6px;
}
.blog-card h3 { font-size: 0.95rem; margin-bottom: 8px; line-height: 1.4; }
.blog-card p { font-size: 0.82rem; color: var(--text-muted); }
.blog-coming { 
  display: flex; align-items: center; justify-content: center; 
  padding: 48px 24px; flex-direction: column; gap: 12px; 
  border: 2px dashed var(--border); border-radius: var(--radius-lg); 
  color: var(--text-muted); text-align: center;
}

/* ---- FOOTER ---- */
.footer { background: var(--text-dark); color: rgba(255,255,255,0.7); padding: 56px 0 24px; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 40px;
}
.footer-brand { display: flex; flex-direction: column; gap: 14px; }
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; color: #fff;
}
.footer-desc { font-size: 0.875rem; line-height: 1.7; max-width: 300px; }
.footer-col h4 {
  color: #fff; font-family: var(--font-display); font-size: 0.85rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: rgba(255,255,255,0.65); font-size: 0.875rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; font-size: 0.82rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ---- UTILITY ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-size: 0.9rem; font-weight: 600;
  padding: 12px 24px; border-radius: var(--radius-md); border: none; cursor: pointer;
  transition: all var(--transition); text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); color: #fff; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.three-col { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

.badge {
  display: inline-flex; align-items: center;
  font-size: 0.78rem; font-weight: 700; padding: 4px 12px; border-radius: 100px;
  font-family: var(--font-display); text-transform: uppercase; letter-spacing: 0.04em;
}
.badge-blue { background: rgba(15,76,129,0.1); color: var(--primary); }
.badge-teal { background: rgba(0,180,216,0.1); color: var(--accent-dark); }

.divider { height: 1px; background: var(--border-light); margin: 48px 0; }

.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mt-0 { margin-top: 0 !important; }

/* ---- INFOGRAPHIC ---- */
.infographic {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: var(--radius-xl); padding: 40px; color: #fff; margin: 32px 0;
  position: relative; overflow: hidden;
}
.infographic::after {
  content: ''; position: absolute; right: -40px; top: -40px;
  width: 200px; height: 200px;
  background: rgba(255,255,255,0.04); border-radius: 50%;
}
.infographic-title {
  font-family: var(--font-display); font-size: 1.2rem; font-weight: 700;
  margin-bottom: 24px; text-align: center;
}
.infographic-row {
  display: flex; align-items: center; gap: 16px;
  background: rgba(255,255,255,0.08); border-radius: var(--radius-md);
  padding: 14px 20px; margin-bottom: 10px;
}
.infographic-num { font-size: 1.5rem; font-weight: 800; font-family: var(--font-display); color: var(--accent-light); min-width: 60px; }
.infographic-text { font-size: 0.9rem; opacity: 0.9; }

/* ---- BACK TO TOP ---- */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px; background: var(--primary);
  color: #fff; border: none; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; box-shadow: var(--shadow-md); font-size: 1.1rem;
  opacity: 0; transform: translateY(20px); transition: all var(--transition);
  z-index: 800;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ---- INNER PAGE HERO ---- */
.inner-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 48px 0; color: #fff;
}
.inner-hero h1 { color: #fff; font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 10px; }
.inner-hero p { color: rgba(255,255,255,0.8); font-size: 1rem; max-width: 600px; }

/* ---- LEGAL PAGES ---- */
.legal-content { max-width: 820px; padding: 48px 0; }
.legal-content h2 { font-size: 1.3rem; margin: 32px 0 12px; }
.legal-content h3 { font-size: 1.05rem; margin: 20px 0 8px; }
.legal-content p { margin-bottom: 14px; font-size: 0.95rem; }
.legal-content ul { padding-left: 20px; margin-bottom: 14px; }
.legal-content li { margin-bottom: 6px; font-size: 0.95rem; }

/* ---- CONTACT FORM ---- */
.contact-form { max-width: 600px; }
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-family: var(--font-display); font-size: 0.85rem; font-weight: 600;
  color: var(--text-dark); margin-bottom: 6px;
}
.form-input, .form-textarea, .form-select {
  width: 100%; border: 2px solid var(--border); border-radius: var(--radius-md);
  padding: 12px 14px; font-size: 0.95rem; font-family: var(--font-body);
  color: var(--text-dark); background: var(--bg);
  transition: border-color var(--transition); outline: none;
}
.form-input:focus, .form-textarea:focus { border-color: var(--accent); background: #fff; }
.form-textarea { min-height: 130px; resize: vertical; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 40px 0 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 24px; }
  .three-col { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .three-col { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .converter-card { padding: 24px 18px; }
  .result-value { font-size: 1.6rem; }
  .toc-grid { grid-template-columns: 1fr; }
  .stat-bar { grid-template-columns: 1fr 1fr; }
  .conversion-grid { grid-template-columns: repeat(2,1fr); }
}

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.5s ease both; }
.fade-up-1 { animation-delay: 0.1s; }
.fade-up-2 { animation-delay: 0.22s; }
.fade-up-3 { animation-delay: 0.34s; }

/* ---- PRINT ---- */
@media print {
  .nav, .footer, .back-to-top { display: none; }
  .hero { background: none; color: #000; }
  .hero h1, .hero-desc, .trust-item { color: #000; }
  .converter-card { box-shadow: none; border: 1px solid #ccc; }
}