@layer base, theme, layout, components;

@layer theme {
  :root {
    color-scheme: light dark;

    --light-bg: #f6f7f9;
    --dark-bg: #0b0d12;
    --light-surface: #ffffff;
    --dark-surface: #12151e;
    --light-surface-subtle: #eef1f6;
    --dark-surface-subtle: #181c28;
    --light-border: rgba(15, 23, 42, 0.09);
    --dark-border: rgba(255, 255, 255, 0.1);
    --light-text: #0f172a;
    --dark-text: #f3f5f9;
    --light-muted: #4b5563;
    --dark-muted: #9ca3b4;
    --light-emerald: #059669;
    --dark-emerald: #10b981;
    --light-violet: #7c3aed;
    --dark-violet: #863bff;
    --light-glow: rgba(16, 185, 129, 0.11);
    --dark-glow: rgba(16, 185, 129, 0.17);
    --light-glow-alt: rgba(134, 59, 255, 0.1);
    --dark-glow-alt: rgba(134, 59, 255, 0.17);
    --light-panel-shadow: rgba(15, 23, 42, 0.24);
    --dark-panel-shadow: rgba(0, 0, 0, 0.58);

    --chevron-emerald: #10b981;
    --chevron-violet: #863bff;

    --bg: var(--light-bg);
    --surface: var(--light-surface);
    --surface-subtle: var(--light-surface-subtle);
    --border: var(--light-border);
    --text: var(--light-text);
    --muted: var(--light-muted);
    --emerald: var(--light-emerald);
    --violet: var(--light-violet);
    --glow: var(--light-glow);
    --glow-alt: var(--light-glow-alt);
    --panel-shadow: var(--light-panel-shadow);

    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
    --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
    --radius-sm: 8px;
    --radius-md: 12px;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --bg: var(--dark-bg);
      --surface: var(--dark-surface);
      --surface-subtle: var(--dark-surface-subtle);
      --border: var(--dark-border);
      --text: var(--dark-text);
      --muted: var(--dark-muted);
      --emerald: var(--dark-emerald);
      --violet: var(--dark-violet);
      --glow: var(--dark-glow);
      --glow-alt: var(--dark-glow-alt);
      --panel-shadow: var(--dark-panel-shadow);
    }
  }

  @supports (color: light-dark(white, black)) {
    :root {
      --bg: light-dark(var(--light-bg), var(--dark-bg));
      --surface: light-dark(var(--light-surface), var(--dark-surface));
      --surface-subtle: light-dark(var(--light-surface-subtle), var(--dark-surface-subtle));
      --border: light-dark(var(--light-border), var(--dark-border));
      --text: light-dark(var(--light-text), var(--dark-text));
      --muted: light-dark(var(--light-muted), var(--dark-muted));
      --emerald: light-dark(var(--light-emerald), var(--dark-emerald));
      --violet: light-dark(var(--light-violet), var(--dark-violet));
      --glow: light-dark(var(--light-glow), var(--dark-glow));
      --glow-alt: light-dark(var(--light-glow-alt), var(--dark-glow-alt));
      --panel-shadow: light-dark(var(--light-panel-shadow), var(--dark-panel-shadow));
    }
  }
}

@layer base {
  html {
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background-color: var(--bg);
    background-image:
      radial-gradient(52rem 22rem at 36% -4rem, var(--glow), transparent 70%),
      radial-gradient(48rem 22rem at 68% -2rem, var(--glow-alt), transparent 70%);
    background-repeat: no-repeat;
    color: var(--text);
    font-size: 0.9375rem;
  }

  h1,
  h2,
  h3,
  p,
  figure,
  pre {
    margin: 0;
  }

  a {
    color: var(--emerald);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
  }

  a:not(.btn, .brand, .nav-github):hover {
    text-decoration: underline;
  }

  code,
  pre,
  kbd {
    font-family: var(--font-mono);
  }

  code:not(pre code) {
    font-size: 0.84em;
    padding-block: 0.1rem;
    padding-inline: 0.34rem;
    border-radius: 5px;
    background: var(--surface-subtle);
    border: 1px solid var(--border);
    color: var(--text);
  }

  kbd {
    display: inline-block;
    font-size: 0.72rem;
    line-height: 1.2;
    padding-block: 0.1rem;
    padding-inline: 0.34rem;
    border-radius: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
  }

  img {
    display: block;
    max-inline-size: 100%;
    block-size: auto;
  }

  .visually-hidden {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
  }
}

@layer layout {
  .shell {
    box-sizing: border-box;
    max-inline-size: 58rem;
    margin-inline: auto;
    padding-inline: 1.25rem;
  }

  .site-header {
    position: sticky;
    inset-block-start: 0;
    z-index: 10;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    border-block-end: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-block-size: 3.15rem;
  }

  .hero {
    padding-block-start: 2.1rem;
    padding-block-end: 1.5rem;
  }

  .features {
    padding-block-start: 0.35rem;
    padding-block-end: 2.35rem;
  }

  .site-footer {
    border-block-start: 1px solid var(--border);
    padding-block: 1.1rem;
  }

  .footer-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1.25rem;
  }
}

@layer components {
  .brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 650;
    letter-spacing: -0.015em;
  }

  .brand-icon {
    inline-size: 1.875rem;
    block-size: 1.875rem;
    border-radius: 7px;
  }

  .brand-name {
    font-size: 0.98rem;
  }

  .site-nav {
    display: flex;
    align-items: center;
    gap: 1.1rem;
    font-size: 0.85rem;
  }

  .site-nav a {
    color: var(--muted);
    text-decoration: none;
    transition: color 120ms ease;
  }

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

  .nav-github {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding-block: 0.28rem;
    padding-inline: 0.62rem;
    border-radius: 999px;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 500;
  }

  .hero-copy {
    text-align: center;
    max-inline-size: 42rem;
    margin-inline: auto;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    color: var(--muted);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding-block: 0.22rem;
    padding-inline: 0.7rem;
    margin-block-end: 0.85rem;
  }

  .chevron-pair {
    display: inline-flex;
    align-items: center;
  }

  h1 {
    font-size: clamp(1.75rem, 3.6vw, 2.4rem);
    line-height: 1.15;
    letter-spacing: -0.03em;
    font-weight: 740;
  }

  .title-sub {
    font-weight: 450;
    color: var(--muted);
  }

  .lead {
    margin-block-start: 0.65rem;
    color: var(--muted);
    font-size: 0.975rem;
    line-height: 1.55;
  }

  .cta-row {
    margin-block-start: 1.15rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding-block: 0.54rem;
    padding-inline: 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 620;
    text-decoration: none;
    transition: transform 120ms ease, filter 120ms ease, box-shadow 120ms ease;
  }

  .btn:hover {
    filter: brightness(1.07);
  }

  .btn:active {
    transform: translateY(1px);
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--chevron-emerald) 0%, var(--chevron-violet) 100%);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.16);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
    box-shadow:
      0 6px 18px rgba(134, 59, 255, 0.22),
      0 2px 8px rgba(16, 185, 129, 0.22);
  }

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

  .brew-wrap {
    margin-block-start: 0.7rem;
    display: flex;
    justify-content: center;
  }

  .brew-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    max-inline-size: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding-block: 0.3rem;
    padding-inline-start: 0.8rem;
    padding-inline-end: 0.35rem;
  }

  .brew-prompt {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--chevron-emerald);
    user-select: none;
  }

  .brew-pill pre {
    overflow-x: auto;
    font-size: 0.78rem;
    color: var(--text);
    scrollbar-width: none;
  }

  .copy-btn {
    flex-shrink: 0;
    font-family: var(--font-sans);
    font-size: 0.73rem;
    font-weight: 600;
    padding-block: 0.22rem;
    padding-inline: 0.62rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface-subtle);
    color: var(--text);
    cursor: pointer;
    transition: border-color 120ms ease;
  }

  .copy-btn:hover {
    border-color: var(--chevron-emerald);
  }

  .hero-panel-figure {
    margin-block-start: 1.5rem;
    max-inline-size: 46.875rem;
    margin-inline: auto;
  }

  .hero-shot {
    inline-size: 100%;
    filter: drop-shadow(0 22px 42px var(--panel-shadow));
  }

  .card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
  }

  .card {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 0.8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding-block: 1rem;
    padding-inline: 1.05rem;
  }

  .card h3 {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.92rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    margin-block-end: 0.38rem;
  }

  .card p {
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.5;
  }

  .dot {
    inline-size: 0.48rem;
    block-size: 0.48rem;
    border-radius: 999px;
    flex-shrink: 0;
  }

  .dot-emerald {
    background: var(--chevron-emerald);
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.55);
  }

  .dot-violet {
    background: var(--chevron-violet);
    box-shadow: 0 0 8px rgba(134, 59, 255, 0.55);
  }

  .chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.38rem;
  }

  .chip {
    display: inline-flex;
    align-items: center;
    gap: 0.28rem;
    font-size: 0.74rem;
    color: var(--muted);
    background: var(--surface-subtle);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding-block: 0.16rem;
    padding-inline: 0.42rem;
  }

  .footer-meta {
    font-size: 0.82rem;
    color: var(--muted);
  }

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    font-size: 0.82rem;
  }

  .footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.32rem;
    color: var(--muted);
    text-decoration: none;
  }

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

  @media (max-width: 48rem) {
    .site-nav {
      gap: 0.75rem;
    }

    .card-grid {
      grid-template-columns: 1fr;
    }
  }
}