/* roulang page: index */
:root {
      --bg-main: #090D16;
      --bg-card: #111827;
      --bg-panel: #161F32;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --primary-gradient: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
      --amber-accent: #F59E0B;
      --card-border: rgba(255, 255, 255, 0.08);
      --card-hover-border: rgba(99, 102, 241, 0.4);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .text-gradient {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-brand {
      background: var(--primary-gradient);
    }
    .glass-nav {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
    }
    .card-base {
      background: var(--bg-card);
      border: 1px solid var(--card-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-base:hover {
      border-color: var(--card-hover-border);
      box-shadow: 0 12px 32px -4px rgba(99, 102, 241, 0.25);
      transform: translateY(-2px);
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    }
    details > summary::-webkit-details-marker {
      display: none;
    }

/* roulang page: category2 */
:root {
            --bg-main: #090D16;
            --bg-card: #111827;
            --bg-panel: #161F32;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
            --primary-gradient: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
            --amber-accent: #F59E0B;
            --card-border: rgba(255, 255, 255, 0.08);
            --card-hover-border: rgba(99, 102, 241, 0.4);
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .bg-gradient-brand {
            background: var(--primary-gradient);
        }
        .glass-nav {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--card-border);
        }
        .card-base {
            background: var(--bg-card);
            border: 1px solid var(--card-border);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-base:hover {
            border-color: var(--card-hover-border);
            box-shadow: 0 12px 32px -4px rgba(99, 102, 241, 0.25);
            transform: translateY(-2px);
        }
        .badge-glow {
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
        }
        .filter-btn.active {
            background: var(--primary-gradient);
            color: #ffffff;
            border-color: transparent;
        }

/* roulang page: category1 */
:root {
      --bg-main: #090D16;
      --bg-card: #111827;
      --bg-panel: #161F32;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --primary-gradient: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
      --amber-accent: #F59E0B;
      --card-border: rgba(255, 255, 255, 0.08);
      --card-hover-border: rgba(99, 102, 241, 0.4);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .text-gradient {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-brand {
      background: var(--primary-gradient);
    }
    .glass-nav {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
    }
    .card-base {
      background: var(--bg-card);
      border: 1px solid var(--card-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-base:hover {
      border-color: var(--card-hover-border);
      box-shadow: 0 12px 32px -4px rgba(99, 102, 241, 0.25);
      transform: translateY(-2px);
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    }
    .filter-btn.active {
      background: var(--primary-gradient);
      color: #ffffff;
      border-color: transparent;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
    }
    .console-badge {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }

/* roulang page: category3 */
:root {
      --bg-main: #090D16;
      --bg-card: #111827;
      --bg-panel: #161F32;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --primary-gradient: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
      --amber-accent: #F59E0B;
      --card-border: rgba(255, 255, 255, 0.08);
      --card-hover-border: rgba(99, 102, 241, 0.4);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .text-gradient {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-brand {
      background: var(--primary-gradient);
    }
    .glass-nav {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
    }
    .card-base {
      background: var(--bg-card);
      border: 1px solid var(--card-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-base:hover {
      border-color: var(--card-hover-border);
      box-shadow: 0 12px 32px -4px rgba(99, 102, 241, 0.25);
      transform: translateY(-2px);
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    }
    .filter-pill {
      background: rgba(22, 31, 50, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: all 0.2s ease;
    }
    .filter-pill.active, .filter-pill:hover {
      background: rgba(99, 102, 241, 0.15);
      border-color: #6366F1;
      color: #38BDF8;
    }

/* roulang page: category4 */
:root {
      --bg-main: #090D16;
      --bg-card: #111827;
      --bg-panel: #161F32;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --primary-gradient: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
      --amber-accent: #F59E0B;
      --card-border: rgba(255, 255, 255, 0.08);
      --card-hover-border: rgba(99, 102, 241, 0.4);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .text-gradient {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-brand {
      background: var(--primary-gradient);
    }
    .glass-nav {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
    }
    .card-base {
      background: var(--bg-card);
      border: 1px solid var(--card-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-base:hover {
      border-color: var(--card-hover-border);
      box-shadow: 0 12px 32px -4px rgba(99, 102, 241, 0.25);
      transform: translateY(-2px);
    }
    .badge-glow {
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.35);
    }
    .badge-gold {
      background: rgba(245, 158, 11, 0.15);
      border: 1px solid rgba(245, 158, 11, 0.4);
      color: #FBBF24;
    }