* {
  box-sizing: border-box;
}

:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #0f4c81;
  --primary-2: #2563eb;
  --border: #dbe3ef;
  --shadow: 0 8px 24px rgba(15, 76, 129, 0.08);
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 70px;
}

.brand {
  font-weight: 700;
  color: var(--primary);
  font-size: 1.1rem;
}

nav a {
  margin-left: 18px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

nav a.active,
nav a:hover {
  color: var(--primary-2);
}

.hero {
  background: linear-gradient(135deg, #0f4c81, #2563eb);
  color: white;
  padding: 70px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  opacity: 0.9;
  margin-bottom: 12px;
}

.hero h1,
.page-header h1,
.prose-card h1 {
  margin: 0 0 16px;
  line-height: 1.15;
}

.lead {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 700px;
}

.lead-small {
  color: var(--muted);
  margin-top: 8px;
}

.hero-actions {
  margin-top: 24px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: white;
  color: var(--primary);
  margin-right: 10px;
}

.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: white;
  border: 1px solid rgba(255,255,255,0.25);
}

.hero-card,
.feature-card,
.summary-card,
.product-card,
.prose-card,
.status-box {
  background: var(--surface);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.hero-card {
  color: var(--text);
  padding: 22px;
}

.stats {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.stat-card {
  padding: 16px;
  border-radius: 12px;
  background: #f8fbff;
  border: 1px solid var(--border);
}

.stat-number {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: 50px 0;
}

.feature-grid,
.summary-cards,
.product-grid {
  display: grid;
  gap: 20px;
}

.feature-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card {
  padding: 20px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 20px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 20px;
}

.toolbar input {
  flex: 1;
  min-width: 260px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.status-box {
  padding: 12px 16px;
  display: flex;
  align-items: center;
}

.summary-cards {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 22px;
}

.summary-card {
  padding: 16px;
}

.summary-label {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.summary-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
}

.product-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.product-card {
  padding: 18px;
}

.product-card h3 {
  margin-top: 0;
  color: var(--primary);
}

.prose-card {
  padding: 28px;
}

.arch-box {
  margin: 28px 0;
  padding: 24px;
  background: #f8fbff;
  border-radius: 14px;
  border: 1px solid var(--border);
  text-align: center;
}

.arch-step {
  font-weight: 700;
  color: var(--primary);
}

.arch-arrow {
  margin: 10px 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  color: var(--muted);
  background: #fff;
  margin-top: 30px;
}

.error {
  color: #b91c1c;
  font-weight: 700;
}

@media (max-width: 800px) {
  .hero-grid,
  .page-header {
    grid-template-columns: 1fr;
    display: block;
  }

  .page-header button {
    margin-top: 16px;
  }

  nav a {
    margin-left: 12px;
    font-size: 0.95rem;
  }
}