/* --- Variables --- */
:root {
  --bg: #0f1419;
  --bg-card: #1a2332;
  --bg-card-hover: #223044;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #3fb950;
  --accent-dim: #238636;
  --accent-glow: rgba(63, 185, 80, 0.25);
  --border: #30363d;
  --font-sans: "Outfit", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 20, 25, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
}

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

/* --- Hero --- */
.hero {
  position: relative;
  padding: 5rem 1.5rem 6rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(35, 134, 54, 0.12), transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #0d1117;
  border: none;
}

.btn-primary:hover {
  background: #56d364;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

/* --- Sections --- */
.section {
  padding: 4rem 1.5rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  color: var(--text);
}

/* --- About --- */
.about-text {
  margin: 0;
  color: var(--text-muted);
  max-width: 680px;
}

.about-text strong {
  color: var(--text);
}

/* --- Features grid --- */
.features-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-dim);
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.feature-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --- CTA --- */
.cta {
  text-align: center;
  padding: 3rem 1.5rem;
}

.cta-text {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
}

/* --- Footer --- */
.footer {
  margin-top: auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
}

.footer .container p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .hero {
    padding: 3rem 1rem 4rem;
  }
  .nav {
    gap: 1rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
}