body {
        margin: 0;
        font-family: "Segoe UI", sans-serif;
        background: #f4f6f8;
        color: #111827;
    }

    /* TOP BAR */
    .topbar {
        height: 60px;
        background: #111827;
        color: #f9fafb;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 28px;
        font-size: 20px;
        font-weight: 600;
        box-shadow: 0 2px 4px rgba(0,0,0,0.3);
    }

    .topbar .user {
        font-size: 15px;
        opacity: 0.8;
    }

    /* PAGE CONTENT */
    .dashboard {
        padding: 40px 50px;
    }

    h1 {
        margin: 0;
        font-size: 32px;
        font-weight: 700;
    }

    .subtitle {
        margin-top: 4px;
        color: #6b7280;
        font-size: 16px;
    }

    /* CATEGORY TITLE */
    .category {
        margin-top: 40px;
        margin-bottom: 12px;
        font-size: 20px;
        font-weight: 600;
        color: #374151;
    }

    /* MODULE GRID */
    .module-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 20px;
    }

    /* MODULE CARD */
    .module-card {
        background: white;
        border-radius: 12px;
        padding: 22px;
        cursor: pointer;
        box-shadow: 0 2px 6px rgba(0,0,0,0.08);
        transition: 0.2s ease;
        border: 1px solid #e5e7eb;
    }

    .module-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 4px 14px rgba(0,0,0,0.15);
        border-color: #d1d5db;
    }

    .icon {
        font-size: 34px;
        margin-bottom: 12px;
    }

    .title {
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 6px;
    }

    .desc {
        font-size: 14px;
        color: #6b7280;
        line-height: 1.3;
    }