:root {
  --bg: #f4f6f8;
  --bg-elevated: #ffffff;
  --bg-dark: #0c1222;
  --border: #e2e6ee;
  --text: #0c1222;
  --text-secondary: #5a6478;
  --text-muted: #8b95a8;
  --primary: #0e9f94;
  --primary-hover: #0b7f78;
  --primary-soft: #e3f6f4;
  --accent: #c4a574;
  --danger: #dc4a4a;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-md: 0 8px 24px rgba(12, 18, 34, 0.08);
  --font: "IBM Plex Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max: 1080px;
  --content: 720px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner,
.site-footer-inner,
.container,
.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
}

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

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}

.nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-decoration: none;
}

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

.hero {
  background: linear-gradient(135deg, #0c1222 0%, #12343a 55%, #0e9f94 100%);
  color: #f7f9fc;
  padding: 88px 0 96px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero p {
  margin: 0 0 28px;
  font-size: 1.125rem;
  color: rgba(247, 249, 252, 0.86);
  max-width: 36rem;
}

.hero-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.hero-card h2 {
  margin: 0 0 12px;
  font-size: 1.125rem;
}

.hero-card ul {
  margin: 0;
  padding-left: 18px;
  color: rgba(247, 249, 252, 0.9);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
}

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

.btn-primary {
  background: var(--accent);
  color: #0c1222;
}

.btn-primary:hover {
  filter: brightness(1.05);
  color: #0c1222;
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #f7f9fc;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 12px;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 32px;
  color: var(--text-secondary);
  max-width: 42rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-secondary);
}

.page {
  padding: 56px 0 88px;
}

.page-inner {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 24px;
}

.page h1 {
  margin: 0 0 8px;
  font-size: 2.25rem;
  letter-spacing: -0.02em;
}

.page-meta {
  margin: 0 0 32px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.page h2 {
  margin: 32px 0 12px;
  font-size: 1.25rem;
}

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

.page ul {
  padding-left: 20px;
}

.callout {
  margin: 28px 0;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  border: 1px solid #b8e8e3;
  color: var(--text);
}

.site-footer {
  background: var(--bg-dark);
  color: #a8b0c0;
  padding: 40px 0;
}

.site-footer a {
  color: #f7f9fc;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}

.footer-grid h3 {
  margin: 0 0 12px;
  color: #f7f9fc;
  font-size: 0.95rem;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li + li {
  margin-top: 8px;
}

.site-footer .brand {
  color: #f7f9fc;
}

.footer-bottom {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .hero-inner,
  .grid-3,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 12px;
    font-size: 0.85rem;
  }

  .site-header-inner {
    flex-wrap: wrap;
    min-height: auto;
    padding-top: 12px;
    padding-bottom: 12px;
  }
}