@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,300;0,400;0,600;0,700;1,400&family=Syne:wght@400;700;800&display=swap');

  :root {
    --bg: #080808;
    --surface: #111111;
    --surface2: #1c1c1c;
    --border: #282828;
    --text: #e8e8e8;
    --text-dim: #505050;
    --accent: #c8c8c8;
    --accent-bright: #ffffff;
    --green: #98c870;
    --green-dim: #1a2a14;
    --blue: #7cb8f0;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'IBM Plex Mono', monospace;
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* ── Background ── */
  .bg-layers {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
  }
  .bg-layers::before {
    content: '';
    position: absolute; inset: 0;
    background:
      radial-gradient(ellipse at 10% 15%,  rgba(255,255,255,0.03) 0%, transparent 50%),
      radial-gradient(ellipse at 90% 85%,  rgba(255,255,255,0.02) 0%, transparent 50%),
      radial-gradient(ellipse at 50% 50%,  rgba(255,255,255,0.01) 0%, transparent 70%),
      radial-gradient(ellipse at 75% 10%,  rgba(255,255,255,0.02) 0%, transparent 35%);
  }
  /* Grid overlay */
  .bg-layers::after {
    content: '';
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  }

  .content { position: relative; z-index: 1; }

  /* ── Header ── */
  header {
    padding: 5rem 3rem 3rem;
    text-align: center;
    position: relative;
  }

  .header-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    animation: fadeUp 0.6s ease forwards;
  }
  .header-tag::before, .header-tag::after {
    content: ''; display: block; width: 40px; height: 1px; background: var(--border); opacity: 0.8;
  }

  h1 {
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -2px;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.1s forwards;
  }
  h1 .accent { color: var(--accent-bright); }
  h1 .dim { color: var(--text-dim); }

  .subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-dim);
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.2s forwards;
  }
  .subtitle span { color: var(--green); }

  /* ── Terminal prompt ── */
  .prompt-bar {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.6rem 1.25rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82rem;
    color: var(--text-dim);
    margin-bottom: 5rem;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.3s forwards;
  }
  .prompt-bar .p-user { color: var(--green); }
  .prompt-bar .p-host { color: var(--accent); }
  .prompt-bar .p-path { color: var(--blue); }
  .prompt-bar .p-cursor {
    display: inline-block; width: 8px; height: 1em;
    background: var(--accent); vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
  }

  /* ── Cards ── */
  .cards-section {
    padding: 0 2rem 6rem;
    max-width: 1000px;
    margin: 0 auto;
  }

  .cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 1.5rem;
  }

  .guide-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    opacity: 0;
    animation: fadeUp 0.6s ease forwards;
  }
  .guide-card:nth-child(1) { animation-delay: 0.35s; }
  .guide-card:nth-child(2) { animation-delay: 0.45s; }

  .guide-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--card-color), transparent);
    opacity: 0;
    transition: opacity 0.3s;
  }
  .guide-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,0.03) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }
  .guide-card:hover { transform: translateY(-6px); border-color: var(--card-color); box-shadow: 0 20px 60px rgba(0,0,0,0.6); }
  .guide-card:hover::before { opacity: 1; }
  .guide-card:hover::after { opacity: 1; }

  /* Neovim card */
  .card-nvim { --card-color: #3fb950; }
  .card-nvim .card-icon { color: #3fb950; }
  .card-nvim .card-badge { background: #112018; color: #3fb950; border-color: #1e3a24; }

  /* Emacs card */
  .card-emacs { --card-color: #a090e8; }
  .card-emacs .card-icon { color: #a090e8; }
  .card-emacs .card-badge { background: #16122a; color: #a090e8; border-color: #2e2850; }

  .card-icon-wrap {
    width: 56px; height: 56px;
    border-radius: 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.6rem;
    transition: transform 0.25s;
  }
  .guide-card:hover .card-icon-wrap { transform: scale(1.1) rotate(-3deg); }

  .card-title-text {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
    font-family: 'IBM Plex Mono', monospace;
  }

  .card-desc {
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
  }

  .card-tags {
    display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem;
  }
  .card-badge {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    border: 1px solid;
    letter-spacing: 0.5px;
  }

  .card-features {
    display: flex; flex-direction: column; gap: 0.5rem;
    margin-bottom: 2rem;
  }
  .card-feature {
    display: flex; align-items: center; gap: 0.6rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-dim);
  }
  .card-feature .dot {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--card-color); flex-shrink: 0;
  }

  .card-cta {
    display: flex; align-items: center; justify-content: space-between;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
  }
  .cta-text {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--card-color);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
  }
  .cta-arrow {
    width: 36px; height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    color: var(--card-color);
    font-size: 1rem;
    transition: transform 0.2s, background 0.2s, border-color 0.2s;
  }
  .guide-card:hover .cta-arrow {
    transform: translateX(4px);
    background: var(--card-color);
    color: var(--bg);
    border-color: var(--card-color);
  }

  /* ── Footer info ── */
  .info-row {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    opacity: 0;
    animation: fadeUp 0.6s ease 0.6s forwards;
  }
  .info-chip {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    display: flex; align-items: center; gap: 0.75rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    color: var(--text-dim);
  }
  .info-chip .ic-icon { font-size: 1rem; }
  .info-chip strong { color: var(--text); display: block; font-size: 0.82rem; }

  footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 3rem;
    display: flex; align-items: center; justify-content: space-between;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
    flex-wrap: wrap; gap: 1rem;
  }
  footer .f-left span { color: var(--accent); }
  footer .f-right { display: flex; gap: 1.5rem; }
  footer .f-right a {
    color: var(--text-dim); text-decoration: none;
    transition: color 0.2s;
  }
  footer .f-right a:hover { color: var(--accent); }

  /* ── Animations ── */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  @keyframes blink { 50% { opacity: 0; } }

  /* ── Responsive ── */
  @media (max-width: 600px) {
    header { padding: 3rem 1.5rem 2rem; }
    .cards-grid { grid-template-columns: 1fr; }
    footer { flex-direction: column; text-align: center; }
  }