:root {
  --primary: #a0c4ff;
  --primary-dark: #5b7db1;
  --accent: #3d5a80;
  --navy: #1e3a5f;
  --bg: #f5f5f5;
  --surface: #ffffff;
  --surface-muted: #f0f4fa;
  --gradient-top: #dce9ff;
  --text: #4a4a4a;
  --text-muted: #8a8a8a;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(30, 58, 95, 0.08);
  --max: 960px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--gradient-top) 0%, var(--bg) 40%);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(160, 196, 255, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-size: 0.95rem;
}

.nav a {
  color: var(--accent);
  font-weight: 500;
}

.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero-logo {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--navy);
  letter-spacing: -0.02em;
}

.hero p.lead {
  margin: 0 auto 1.5rem;
  max-width: 36rem;
  font-size: 1.125rem;
  color: var(--text-muted);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--navy);
  box-shadow: 0 4px 16px rgba(91, 125, 177, 0.35);
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid rgba(160, 196, 255, 0.6);
}

.section {
  padding: 2.5rem 0;
}

.section h2 {
  margin: 0 0 1rem;
  color: var(--navy);
  font-size: 1.5rem;
}

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

.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(160, 196, 255, 0.25);
}

.card h3 {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page {
  padding: 2rem 0 3rem;
}

.page h1 {
  margin: 0 0 0.5rem;
  color: var(--navy);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.page .updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  color: var(--accent);
  font-size: 1.15rem;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose ul {
  padding-left: 1.25rem;
}

.contact-box {
  background: var(--surface-muted);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-top: 2rem;
  border: 1px solid rgba(160, 196, 255, 0.35);
}

.site-footer {
  margin-top: auto;
  padding: 2rem 0;
  border-top: 1px solid rgba(160, 196, 255, 0.35);
  background: rgba(255, 255, 255, 0.6);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
  }
}