:root {
  --bg: #0d1117;
  --bg-alt: #11161f;
  --surface: #161c26;
  --border: #232b38;
  --text: #e6edf3;
  --muted: #9aa7b8;
  --accent: #4f8cff;
  --accent-soft: rgba(79, 140, 255, 0.12);
  --radius: 14px;
  --max: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.brand-name {
  font-size: 18px;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav a:hover {
  color: var(--text);
}

/* Hero */
.hero {
  padding: 120px 0 100px;
  text-align: center;
  background:
    radial-gradient(900px 400px at 50% -10%, var(--accent-soft), transparent);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 18px;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 24px;
}

.lede {
  max-width: 620px;
  margin: 0 auto 36px;
  font-size: 1.15rem;
  color: var(--muted);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: 10px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 6px 20px rgba(79, 140, 255, 0.3);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(79, 140, 255, 0.4);
}

/* Sections */
.section {
  padding: 84px 0;
}

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

.section h2 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 20px;
}

.section-text {
  max-width: 640px;
  font-size: 1.08rem;
  color: var(--muted);
  margin: 0;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 36px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  font-weight: 600;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Contact */
.contact {
  text-align: center;
}

.contact .section-text {
  margin: 0 auto 28px;
}

.email {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 14px 30px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.email:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner a {
  color: var(--muted);
  text-decoration: none;
}

.footer-inner a:hover {
  color: var(--text);
}

@media (max-width: 560px) {
  .nav {
    display: none;
  }
  .hero {
    padding: 84px 0 64px;
  }
}