/* ── Reset & Base ───────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --bg-card: #1a1a1a;
  --border: #262626;
  --text: #fafafa;
  --text-secondary: #a1a1a1;
  --accent: #4A86E8;
  --accent-hover: #6a9eef;
  --terminal-bg: #111111;
  --terminal-border: #2a2a2a;
  --green: #22c55e;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

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

/* ── Nav ────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

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

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  padding: 160px 24px 100px;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* ── Install Box ────────────────────────────────────────── */
.install-box {
  max-width: 540px;
  margin: 0 auto 20px;
}

.install-os {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.install-command {
  display: flex;
  align-items: center;
  background: var(--terminal-bg);
  border: 1px solid var(--terminal-border);
  border-radius: 10px;
  padding: 14px 16px;
  gap: 12px;
}

.install-command code {
  flex: 1;
  font-family: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;
  font-size: 0.875rem;
  color: var(--green);
  white-space: nowrap;
  overflow-x: auto;
  text-align: left;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  padding: 6px 12px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  transition: all 0.15s;
  flex-shrink: 0;
}

.copy-btn:hover {
  color: var(--text);
  border-color: var(--text-secondary);
}

.copy-btn.copied {
  color: var(--green);
  border-color: var(--green);
}

.hero-alt {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Section common ─────────────────────────────────────── */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  margin-bottom: 12px;
}

.section-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 48px;
}

/* ── Features ───────────────────────────────────────────── */
.features {
  padding: 80px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.features .section-title {
  margin-bottom: 48px;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: #3a3a3a;
}

.feature-icon {
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Tools ──────────────────────────────────────────────── */
.tools {
  padding: 80px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 16px;
  text-align: center;
  transition: border-color 0.2s, transform 0.2s;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.tool-name {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  margin-top: 40px;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

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

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero {
    padding: 120px 20px 60px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links {
    gap: 16px;
  }

  .install-command code {
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .copy-label {
    display: none;
  }
}