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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
            "Helvetica Neue", Arial, "Noto Sans", sans-serif;
        background: #ffffff;
        color: #09090b;
        min-height: 100vh;
        padding: 20px;
        position: relative;
    }

    #bg-canvas {
        position: fixed;
        inset: 0;
        z-index: -1;
        pointer-events: none;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    .header {
        text-align: center;
        margin-bottom: 40px;
    }

    .header h1 {
        font-size: 2.5rem;
        color: #09090b;
        font-weight: 600;
        margin-bottom: 10px;
    }

    .theme-toggle {
        position: fixed;
        top: 20px;
        right: 20px;
        background: #fff;
        border: 1px solid #e4e4e7;
        border-radius: 50%;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        cursor: pointer;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        transition: all 0.2s;
        z-index: 1000;
    }

    .theme-toggle:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    .section {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 1.5rem;
        color: #09090b;
        font-weight: 600;
        border-left: 3px solid #d5d5d5;
        padding-left: 15px;
        margin-bottom: 20px;
    }

    .cards-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }

    .card {
        background: #fff;
        border: 1px solid #e4e4e7;
        border-radius: 8px;
        padding: 20px;
        transition: all 0.2s;
        text-decoration: none;
        color: inherit;
        display: block;
    }

    .card:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        border-color: #3b82f6;
    }

    .card-title {
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 8px;
        color: #09090b;
    }

    .card-description {
        font-size: 0.9rem;
        color: #71717a;
        line-height: 1.4;
    }

    .footer {
        text-align: center;
        margin-top: 60px;
        padding: 20px;
        color: #71717a;
        font-size: 0.9rem;
    }

    .footer a {
        color: #71717a;
        text-decoration: none;
    }

    .footer a:hover {
        text-decoration: none;
    }

    .dark-theme {
        background: #09090b;
        color: #fafafa;
    }

    .dark-theme .header h1 {
        color: #fafafa;
    }

    .dark-theme .card {
        background: #18181b;
        border-color: #27272a;
        color: #fafafa;
    }

    .dark-theme .card:hover {
        border-color: #3b82f6;
    }

    .dark-theme .card-title {
        color: #fafafa;
    }

    .dark-theme .card-description {
        color: #a1a1aa;
    }

    .dark-theme .section-title {
        color: #fafafa;
        border-color: #3f3f46;
    }

    .dark-theme .theme-toggle {
        background: #18181b;
        border-color: #27272a;
        color: #fafafa;
    }

    .dark-theme .footer {
        color: #a1a1aa;
    }

    @media (max-width: 768px) {
        .header h1 {
            font-size: 2rem;
        }

        .cards-grid {
            grid-template-columns: 1fr;
        }

        .theme-toggle {
            width: 45px;
            height: 45px;
            font-size: 1.3rem;
        }
    }