*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-code: #1c2128;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --green: #3fb950;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --max-w: 960px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

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

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

/* ── Header ──────────────────────────────────────── */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 1.25rem 1.5rem;

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
  }

  nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;

    a {
      color: var(--text-muted);

      &:hover {
        color: var(--text);
      }
    }
  }
}

/* ── Hero ────────────────────────────────────────── */

.hero {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 4rem 1.5rem 3rem;
  text-align: center;

  h1 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-block-end: 1rem;

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

  .subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-inline-size: 600px;
    margin: 0 auto 2rem;
  }

  .install {
    display: inline-block;
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--green);
    margin-block-end: 1.5rem;
  }

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

    .btn {
      white-space: nowrap;
    }
  }

  @media (width <= 400px) {
    .cta {
      flex-direction: column;
      align-items: stretch;
    }
  }

  @media (width <= 640px) {
    h1 {
      font-size: 2rem;
    }

    .subtitle {
      font-size: 1rem;
    }

    .install {
      font-size: 0.8rem;
      padding: 0.6rem 1rem;
    }
  }
}

.gopher {
  block-size: min(12rem, 20vw);
  overflow: hidden;
  margin-block-end: -1rem;
  mask-image: linear-gradient(to bottom, #000 70%, transparent 100%);

  .lid-top, .lid-bot {
    transition: transform 80ms ease-in-out;
  }
}

.gopher-svg {
  display: block;
  margin-inline: auto;
  inline-size: 50%;
  will-change: transform;
  cursor: pointer;
  user-select: none;
}

/* ── Alpha badge ─────────────────────────────────── */

.alpha-badge {
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #e3b341;
  background: rgba(210, 153, 34, 0.15);
  border: 1px solid rgba(210, 153, 34, 0.3);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  line-height: 1;
}

/* ── Buttons ─────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 150ms, color 150ms;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);

  &:hover {
    background: var(--accent-hover);
    color: var(--bg);
  }
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);

  &:hover {
    border-color: var(--text-muted);
    color: var(--text);
  }
}

/* ── Tech stack ──────────────────────────────────── */

.tech {
  display: flex;
  justify-content: center;
  gap: 2rem;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 1.5rem 3rem;
  flex-wrap: wrap;

  a {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;

    &:hover {
      color: var(--text);
    }
  }
}

/* ── Features ────────────────────────────────────── */

.features {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem 1.5rem 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;

  @media (width <= 640px) {
    grid-template-columns: 1fr;
  }
}

.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;

  .icon {
    font-size: 1.5rem;
    margin-block-end: 0.75rem;
  }

  h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-block-end: 0.4rem;
  }

  p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
  }
}

/* ── Code example ────────────────────────────────── */

.code-section {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem 1.5rem 3rem;

  h2 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-block-end: 1.25rem;
  }

  .code-block {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    overflow-x: auto;

    pre {
      font-family: var(--font-mono);
      font-size: 0.85rem;
      line-height: 1.65;
      color: var(--text);
    }
  }
}

/* Syntax colors */
.kw { color: #ff7b72; }
.ty { color: #79c0ff; }
.fn { color: #d2a8ff; }
.cm { color: #8b949e; }
.st { color: #a5d6ff; }
.tag { color: #7ee787; }

/* ── Generated grid ──────────────────────────────── */

.generated {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem 1.5rem 3rem;

  h2 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-block-end: 1.25rem;
  }

  .gen-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
  }

  .gen-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;

    h3 {
      font-size: 1rem;
      font-weight: 600;
      margin-block-end: 0.4rem;
    }

    p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
  }

  .gen-file {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--green);
    margin-block-end: 0.6rem;
  }
}

/* ── Footer ──────────────────────────────────────── */

.site-footer {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 2rem 1.5rem;
  border-block-start: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.825rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 0.75rem;

  a {
    color: var(--text-muted);

    &:hover {
      color: var(--text);
    }
  }

  .footer-links {
    display: flex;
    gap: 1.25rem;
  }

  @media (width <= 640px) {
    flex-direction: column;
    text-align: center;
  }
}