:root {
    --bg: #191127;
    --surface: #180f26;
    --card: #23133a;
    --border: #3a1c63;
    --accent: #883CF0;
    --accent2: #7c3aed;
    --accent3: #8b5cf6;
    --text: #e2e8f0;
    --muted: #d6d6d6;
    --glow: 0 0 20px rgba(123, 0, 255, 0.25);
  }

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

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

  /* Animated grid background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(115, 0, 255, 0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(128, 0, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: gridShift 20s linear infinite;
    pointer-events: none;
    z-index: 0;
  }

  @keyframes gridShift {
    0% { transform: translate(0,0); }
    100% { transform: translate(40px,40px); }
  }

  /* Scanline overlay */
  body::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.08) 2px,
      rgba(0,0,0,0.08) 4px
    );
    pointer-events: none;
    z-index: 1;
  }

  .container {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 80px;
  }

  /* HEADER */
  header {
    padding: 48px 0 32px;
    text-align: center;
    position: relative;
  }

  .logo-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
  }

  .logo-dot {
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--accent);
    animation: pulse 2s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.7); }
  }

  h1 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 60%, var(--accent3) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .tagline {
    color: var(--muted);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-top: 6px;
  }

  /* HERO CARD — main browser reveal */
  .hero-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px;
    margin: 24px 0 32px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--glow);
    transition: box-shadow 0.3s;
  }

  .hero-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
  }

  .hero-card:hover {
    box-shadow: 0 0 40px rgba(144, 0, 255, 0.35);
  }

  .browser-hero {
    display: flex;
    align-items: center;
    gap: 28px;
    flex-wrap: wrap;
  }

  .browser-icon-wrap {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: #1f1232;
    border: 1px solid #3a1c63;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    position: relative;
    overflow: hidden;
  }

  .browser-icon-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(140, 0, 255, 0.15), transparent 70%);
  }

  .browser-info h2 {
    font-family: 'Syne', sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent);
  }

  .browser-version-tag {
    display: inline-block;
    background: #1f1232;
    border: 1px solid #3a1c63;
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    margin-top: 6px;
    margin-right: 6px;
  }

  .browser-version-tag.os-tag {
    background: #1f1232;
    border-color: #3a1c63;
    color: var(--accent2);
  }

  .browser-version-tag.device-tag {
    background: #1f1232;
    border-color: #3a1c63;
    color: var(--accent3);
  }

  /* STATUS ROW */
  .status-row {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
  }

  .status-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.68rem;
    letter-spacing: 0.05em;
  }

  .status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
  }

  .ok { background: var(--accent3); box-shadow: 0 0 6px var(--accent3); }
  .warn { background: #fbbf24; box-shadow: 0 0 6px #fbbf24; }
  .bad { background: var(--accent2); box-shadow: 0 0 6px var(--accent2); }

  /* GRID SECTION */
  .section-title {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  .info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
    margin-bottom: 32px;
  }

  .info-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px 20px;
    transition: all 0.25s;
    cursor: default;
    position: relative;
    overflow: hidden;
  }

  .info-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.3s;
    background: radial-gradient(circle at var(--mx,50%) var(--my,50%), rgba(162, 0, 255, 0.06), transparent 60%);
  }

  .info-card:hover { border-color: #3a1c63; transform: translateY(-2px); }
  .info-card:hover::before { opacity: 1; }

  .info-label {
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
  }

  .info-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    word-break: break-all;
    line-height: 1.4;
  }

  .info-value.accent { color: var(--accent); }
  .info-value.accent2 { color: var(--accent2); }
  .info-value.accent3 { color: var(--accent3); }

  /* USER AGENT block */
  .ua-block {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 32px;
  }

  .ua-string {
    font-size: 0.72rem;
    color: var(--muted);
    line-height: 1.6;
    word-break: break-all;
    border-left: 3px solid var(--accent);
    padding-left: 14px;
    margin-top: 10px;
  }

  /* FEATURES */
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
    margin-bottom: 32px;
  }

  .feature-chip {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 0.68rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
  }

  .feature-chip.supported {
    border-color: #5e309d;
    color: var(--accent3);
  }

  .feature-chip.unsupported {
    border-color: #3a1c63;
    color: var(--accent2);
    opacity: 0.7;
  }

  /* COPY BUTTON */
  .copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #1f1232;
    border: 1px solid #3a1c63;
    color: var(--accent);
    border-radius: 8px;
    padding: 8px 16px;
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 10px;
  }

  .copy-btn:hover {
    background: #2a164776;
    box-shadow: 0 0 12px rgba(128, 0, 255, 0.2);
  }

  .copy-btn:active { transform: scale(0.97); }

  /* REFRESH BTN */
  .refresh-btn {
    display: block;
    margin: 0 auto;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: 8px;
    padding: 10px 24px;
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 40px;
  }

  .refresh-btn:hover { border-color: var(--accent); color: var(--accent); }

  /* LOADING ANIMATION */
  @keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .hero-card { animation: fadeInUp 0.4s ease both; }
  .info-grid { animation: fadeInUp 0.5s 0.1s ease both; }
  .ua-block { animation: fadeInUp 0.5s 0.15s ease both; }
  .features-grid { animation: fadeInUp 0.5s 0.2s ease both; }

  /* TYPING CURSOR */
  .cursor-blink {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--accent);
    vertical-align: text-bottom;
    animation: blink 1s step-start infinite;
  }

  @keyframes blink {
    50% { opacity: 0; }
  }

  footer {
    text-align: center;
    color: var(--muted);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    padding-top: 24px;
    border-top: 1px solid var(--border);
  }

  /* TOOLTIP */
  [data-tip] { position: relative; }
  [data-tip]:hover::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 0.65rem;
    white-space: nowrap;
    pointer-events: none;
    z-index: 10;
    color: var(--text);
  }

  /* SCREEN WIDTH GAUGE */
  .gauge-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 10px;
    overflow: hidden;
  }

  .gauge-fill {
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transition: width 1s cubic-bezier(0.4,0,0.2,1);
  }