:root {
  --primary: #0b3a67;
  --accent: #0f9d8a;
  --bg: #f7fafc;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.55;
}
html { scroll-behavior: smooth; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1120px, 92%); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}
.logo {
  font-weight: 800;
  letter-spacing: 0.2px;
  color: var(--primary);
  text-decoration: none;
}
.main-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.main-nav a {
  color: #1f2937;
  font-weight: 500;
  text-decoration: none;
}

.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 0.68rem 1rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-secondary {
  background: #fff;
  color: var(--primary);
  border-color: var(--primary);
}
.hero {
  background: var(--bg);
  padding: 3.8rem 0 3rem;
  border-bottom: 1px solid var(--border);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1.5rem;
}
.hero h1 { font-size: clamp(1.8rem, 2.4vw, 2.6rem); line-height: 1.2; margin: 0 0 0.9rem; }
.hero p { color: var(--muted); font-size: 1.04rem; }
.hero-actions { display: flex; gap: 0.7rem; margin-top: 1rem; flex-wrap: wrap; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.section { padding: 3rem 0; }
.bg-soft { background: var(--bg); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.1rem;
}
.stat-card ul { padding-left: 1.2rem; margin: 0.5rem 0 0; }

.tool-grid, .feature-grid, .guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.tool-card, .guide-card {
  display: block;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  background: #fff;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.tool-card h3, .guide-card h3 { margin: 0 0 0.45rem; }
.tool-card p, .guide-card p { color: var(--muted); margin: 0; }
.tool-card.muted { opacity: 0.75; }
.tool-card:hover, .guide-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  text-decoration: none;
}

.tool-card {
  border-top: 4px solid #dbeafe;
}
.tool-card:nth-child(1) { border-top-color: #60a5fa; background: linear-gradient(180deg, #eff6ff 0%, #ffffff 22%); }
.tool-card:nth-child(2) { border-top-color: #34d399; background: linear-gradient(180deg, #ecfdf5 0%, #ffffff 22%); }
.tool-card:nth-child(3) { border-top-color: #f59e0b; background: linear-gradient(180deg, #fffbeb 0%, #ffffff 22%); }
.tool-card:nth-child(4) { border-top-color: #a78bfa; background: linear-gradient(180deg, #f5f3ff 0%, #ffffff 22%); }
.tool-card:nth-child(5) { border-top-color: #fb7185; background: linear-gradient(180deg, #fff1f2 0%, #ffffff 22%); }
.tool-card:nth-child(6) { border-top-color: #22d3ee; background: linear-gradient(180deg, #ecfeff 0%, #ffffff 22%); }

.section-action {
  margin: 1.2rem 0 0;
}

.animate-in {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 240ms ease-out, transform 240ms ease-out;
}
.animate-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.stagger-grid > *:nth-child(2) { transition-delay: 40ms; }
.stagger-grid > *:nth-child(3) { transition-delay: 80ms; }
.stagger-grid > *:nth-child(4) { transition-delay: 120ms; }
.stagger-grid > *:nth-child(5) { transition-delay: 160ms; }
.stagger-grid > *:nth-child(6) { transition-delay: 200ms; }

.compliance-strip {
  text-align: center;
  color: #374151;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  padding: 1rem 0;
}
.footer-grid nav { display: flex; flex-wrap: wrap; gap: 0.8rem; }

.prose { max-width: 860px; }
.prose h1 { margin-top: 0; }
.prose h2 { margin-top: 1.6rem; }
.prose p, .prose li { color: #374151; }

.calc-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  align-items: start;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}
.field {
  display: grid;
  gap: 0.35rem;
}
.field label {
  font-size: 0.93rem;
  color: #374151;
  font-weight: 600;
}
input, select {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 0.98rem;
}
.result-panel {
  position: sticky;
  top: 86px;
}
.kpi {
  margin: 0.45rem 0;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-weight: 600;
}
.kpi strong { color: var(--primary); }
.total-kpi {
  border-top: 1px solid var(--border);
  padding-top: 0.7rem;
  margin-top: 0.7rem;
  font-size: 1.05rem;
}
.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
}
table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
th, td {
  padding: 0.62rem;
  border-bottom: 1px solid var(--border);
  text-align: right;
  font-size: 0.93rem;
}
th:first-child, td:first-child { text-align: left; }

.faq details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem;
  margin-bottom: 0.6rem;
  background: #fff;
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
}

@media (max-width: 920px) {
  .hero-grid, .calc-wrap, .tool-grid, .feature-grid, .guide-grid { grid-template-columns: 1fr 1fr; }
  .result-panel { position: static; }
}
@media (max-width: 680px) {
  .main-nav { display: none; }
  .hero-grid, .calc-wrap, .tool-grid, .feature-grid, .guide-grid, .form-grid { grid-template-columns: 1fr; }
  .section { padding: 2.2rem 0; }
}