:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --accent: #3b82f6;
  --accent-soft: #dbeafe;
  --text: #0f172a;
  --text-light: #e2e8f0;
  --muted: #64748b;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border: #e2e8f0;
  --shadow: 0 16px 35px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  line-height: 1.6;
}

.container {
  width: min(1080px, 92%);
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(248, 250, 252, 0.92);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.brand {
  text-decoration: none;
  color: var(--bg);
  font-weight: 800;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
}

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

.hero {
  padding: 6rem 0 4rem;
}

.hero-card {
  border-radius: 20px;
  padding: 2.5rem;
  background: radial-gradient(circle at top right, #bfdbfe 0%, #ffffff 45%, #ffffff 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin: 0 0 1rem;
  line-height: 1.15;
}

h2 {
  margin-top: 0;
  font-size: clamp(1.5rem, 2vw, 2.1rem);
}

.btn {
  display: inline-block;
  margin-top: 0.8rem;
  background: var(--accent);
  color: #fff;
  padding: 0.8rem 1.3rem;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
}

.section {
  padding: 2.5rem 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
}

.badge {
  display: inline-block;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #1e3a8a;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-hero {
  padding: 4rem 0 1.4rem;
}

footer {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
  background: #f8fafc;
  color: var(--muted);
}

.footer-inner {
  padding: 1.5rem 0;
  text-align: center;
}

@media (max-width: 700px) {
  .header-inner {
    flex-direction: column;
    gap: 0.8rem;
  }

  .hero {
    padding-top: 4.5rem;
  }

  .hero-card {
    padding: 1.5rem;
  }
}