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

  :root {
    --bg: #F9FAFB;
    --bg-card: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: rgba(0,0,0,0.08);
    --accent: #4F46E5;
    --accent-2: #06B6D4;
    --glass-bg: rgba(255,255,255,0.8);
    --glass-border: rgba(0,0,0,0.06);
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 20px rgba(0,0,0,0.05);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.10);
    --nav-bg: rgba(249,250,251,0.85);
    --blob-1: rgba(79,70,229,0.08);
    --blob-2: rgba(6,182,212,0.06);
  }
  .dark {
    --bg: #0B0F19;
    --bg-card: rgba(255,255,255,0.04);
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --border: rgba(255,255,255,0.08);
    --accent: #6366F1;
    --accent-2: #22D3EE;
    --glass-bg: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.08);
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 20px rgba(0,0,0,0.2);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
    --nav-bg: rgba(11,15,25,0.85);
    --blob-1: rgba(99,102,241,0.12);
    --blob-2: rgba(34,211,238,0.08);
  }

  body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
  }

  .font-display { font-family: 'Bricolage Grotesque', sans-serif; }

  /* Glass */
  .glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
  }

  /* Nav */
  .nav-wrap {
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease;
  }

  .nav-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
  }
  .nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 1.5px;
    background: var(--accent);
    transition: width 0.25s ease;
    border-radius: 2px;
  }
  .nav-link:hover { color: var(--text-primary); }
  .nav-link:hover::after { width: 100%; }

  /* Card */
  .card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
  }
  .card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
  }
  .dark .card:hover { border-color: rgba(99,102,241,0.25); }
  .light .card:hover, :root:not(.dark) .card:hover { border-color: rgba(79,70,229,0.2); }

  /* Text gradient */
  .text-grad {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  /* Accent button */
  .btn-primary {
    background: var(--accent);
    color: white;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.25s ease;
    box-shadow: 0 0 0 0 rgba(99,102,241,0);
  }
  .btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(99,102,241,0.35);
  }

  .btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-weight: 500;
    border-radius: 12px;
    transition: all 0.25s ease;
  }
  .btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
  }

  /* Blob */
  .blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
  }

  /* Grid bg */
  .grid-bg {
    background-image:
      linear-gradient(var(--border) 1px, transparent 1px),
      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 64px 64px;
  }

  /* Badge */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 100px;
    border: 1px solid;
    color: var(--accent);
    border-color: rgba(99,102,241,0.25);
    background: rgba(99,102,241,0.07);
  }

  /* Icon box */
  .icon-box {
    width: 44px; height: 44px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
  }

  /* Input */
  .field {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 11px 14px;
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    font-family: 'DM Sans', sans-serif;
  }
  .field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
  }
  .field::placeholder { color: var(--text-muted); }
  textarea.field { resize: none; }

  /* Label */
  .label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 7px;
  }

  /* Scrollbar */
  ::-webkit-scrollbar { width: 5px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

  /* Stat card glow accent */
  .stat-accent {
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    border-radius: 2px;
    width: 36px;
    margin: 16px auto 0;
    transition: width 0.4s ease;
  }
  .card:hover .stat-accent { width: 56px; }

  /* Reveal on scroll */
  .reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.65s ease, transform 0.65s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Theme toggle */
  #theme-toggle {
    width: 38px; height: 38px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.25s ease;
    color: var(--text-secondary);
  }
  #theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: scale(1.05);
  }

  /* Footer divider */
  .footer-divider { border-color: var(--border); }

  /* Light mode specific card shadow */
  :root:not(.dark) .card {
    box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 8px rgba(0,0,0,0.04);
  }
  :root:not(.dark) .card:hover {
    box-shadow: 0 4px 24px rgba(0,0,0,0.10);
  }

  /* Subtle section divider dots */
  .dot-divider {
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
    display: inline-block;
  }

  /* Chip */
  .chip {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 6px;
    letter-spacing: 0.04em;
  }
  .logo-dark {
    display: none;
}

.dark .logo-light {
    display: none;
}

.dark .logo-dark {
    display: block;
}