:root {
    --bg: #080b10;
    --surface: #0e1219;
    --surface2: #141924;
    --border: #1e2535;
    --border2: #2a3347;
    --a1: #00e5ff;
    --a2: #ff4d6d;
    --a3: #c8f55a;
    --a4: #ff9f1c;
    --a5: #b57bee;
    --text: #e8edf5;
    --muted: #4a5568;
    --muted2: #6b7a99;
  }

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

  html { scroll-behavior: smooth; }

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

  /* Animated bg grid */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* Glow orbs */
  .orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.12;
  }
  .orb1 { width: 500px; height: 500px; background: var(--a1); top: -150px; left: -100px; }
  .orb2 { width: 400px; height: 400px; background: var(--a2); bottom: -100px; right: -80px; }

  .wrap { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

  /* ── HEADER ── */
  header {
    padding: 3.5rem 0 2rem;
    animation: fadeDown 0.7s ease both;
  }

  @keyframes fadeDown { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes fadeUp   { from { opacity: 0; transform: translateY(24px); }  to { opacity: 1; transform: translateY(0); } }

  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
  }

  .brand { line-height: 1; }
  .brand-sub { font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--a1); margin-bottom: 0.5rem; }
  .brand-name {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2.2rem, 5vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
  }
  .brand-name em { color: var(--a1); font-style: normal; }

  .header-meta { font-size: 0.65rem; color: var(--muted2); text-align: right; line-height: 2; }
  .header-meta a { color: var(--a1); text-decoration: none; }
  .header-meta a:hover { text-decoration: underline; }

  /* ── TABS ── */
  .tabs-bar {
    display: flex;
    gap: 0;
    margin-top: 0;
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
  }
  .tabs-bar::-webkit-scrollbar { display: none; }

  .tab-btn {
    font-family: 'Fira Code', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 1.1rem 1.5rem;
    background: none;
    border: none;
    color: var(--muted2);
    cursor: pointer;
    position: relative;
    white-space: nowrap;
    transition: color 0.25s;
  }

  .tab-btn::after {
    content: '';
    position: absolute;
    bottom: -1px; left: 0; right: 0;
    height: 2px;
    background: var(--tab-color, var(--a1));
    transform: scaleX(0);
    transition: transform 0.3s ease;
  }

  .tab-btn:hover { color: var(--text); }
  .tab-btn.active { color: var(--text); }
  .tab-btn.active::after { transform: scaleX(1); }

  .tab-btn .tab-count {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.6rem;
    background: var(--border2);
    color: var(--muted2);
    padding: 0.1rem 0.4rem;
    border-radius: 2px;
  }
  .tab-btn.active .tab-count { background: var(--tab-color, var(--a1)); color: var(--bg); }

  /* ── SECTIONS ── */
  .tab-panel { display: none; padding: 2.5rem 0; }
  .tab-panel.active { display: block; }

  /* ── CATEGORY LABEL ── */
  .category-label {
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cat-color, var(--a1));
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.7rem;
  }
  .category-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }

  /* ── GRID ── */
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.2rem;
    margin-bottom: 3rem;
  }

  /* ── CARD ── */
  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    animation: fadeUp 0.6s ease both;
  }

  .card:hover {
    border-color: var(--card-color, var(--a1));
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.5), 0 0 0 1px var(--card-color, var(--a1));
  }

  .card-top-bar {
    height: 2px;
    background: var(--card-color, var(--a1));
    width: 0;
    transition: width 0.4s ease;
  }
  .card:hover .card-top-bar { width: 100%; }

  .card-preview-wrap {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: #0a0e16;
  }

  .card-preview {
    width: 100%;
    height: 100%;
    border: none;
    pointer-events: none;
    transform-origin: top left;
    transform: scale(1);
    transition: transform 0.5s ease;
  }

  .card:hover .card-preview { transform: scale(1.03); }

  /* Overlay shimmer */
  .card-preview-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 60%, var(--surface) 100%);
    pointer-events: none;
  }

  /* Badge */
  .card-badge {
    position: absolute;
    top: 10px; right: 10px;
    font-size: 0.55rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 0.25rem 0.55rem;
    background: var(--card-color, var(--a1));
    color: var(--bg);
    font-weight: 500;
    z-index: 2;
  }

  .card-body {
    padding: 1.3rem 1.4rem 1.4rem;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .card-tech {
    font-size: 0.58rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--card-color, var(--a1));
    margin-bottom: 0.45rem;
  }

  .card-title {
    font-family: 'Syne', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.35rem;
    line-height: 1.2;
  }

  .card-url {
    font-size: 0.6rem;
    color: var(--muted);
    word-break: break-all;
    margin-bottom: auto;
    padding-bottom: 1rem;
  }

  .card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-top: 0.8rem;
  }

  .btn-visit {
    font-family: 'Fira Code', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--card-color, var(--a1));
    padding: 0.45rem 1rem;
    text-decoration: none;
    transition: opacity 0.2s;
  }
  .btn-visit:hover { opacity: 0.8; }

  .card-num {
    font-family: 'Syne', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--border2);
    line-height: 1;
    transition: color 0.3s;
  }
  .card:hover .card-num { color: var(--card-color, var(--a1)); opacity: 0.35; }

  /* GitHub card variant */
  .card-github .card-preview-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface2);
  }

  .github-icon {
    opacity: 0.15;
    transition: opacity 0.3s;
  }
  .card:hover .github-icon { opacity: 0.3; }

  /* Credential notice */
  .cred-note {
    font-size: 0.6rem;
    color: var(--a4);
    background: rgba(255,159,28,0.08);
    border: 1px solid rgba(255,159,28,0.2);
    padding: 0.7rem 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }
  .cred-note span { color: var(--text); }

  /* ── FOOTER ── */
  footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    font-size: 0.62rem;
    color: var(--muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
  }

  @media (max-width: 600px) {
    .wrap { padding: 0 1rem; }
    .header-inner { flex-direction: column; align-items: flex-start; }
    .header-meta { text-align: left; }
  }