body {
        margin: 0;
        font-family: Arial, sans-serif;
        background: #f4f6f9;
    }

    .container {
        padding: 20px;
    }

    h1 {
        margin-bottom: 20px;
        color: #333;
    }

    /* GRID BASE */
    .grid {
        display: grid;
        gap: 20px;
    }

    /* 📱 Móvil */
    @media (max-width: 576px) {
        .grid {
            grid-template-columns: 1fr;
        }
    }

    /* 📲 Tablet */
    @media (min-width: 577px) and (max-width: 992px) {
        .grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    /* 💻 Desktop */
    @media (min-width: 993px) {
        .grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    /* TARJETAS */
    .card {
        background: white;
        border-radius: 10px;
        padding: 20px;
        color: #333;
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        border-left: 6px solid transparent;
        transition: transform 0.2s;
    }

    .card:hover {
        transform: translateY(-4px);
    }

    .card-title {
        font-size: 14px;
        color: #777;
        margin-bottom: 10px;
    }

    .card-value {
        font-size: 28px;
        font-weight: bold;
    }

    /* 🎨 10 COLORES */
    .card.blue   { border-left-color: #3498db; }
    .card.green  { border-left-color: #2ecc71; }
    .card.red    { border-left-color: #e74c3c; }
    .card.orange { border-left-color: #f39c12; }
    .card.purple { border-left-color: #9b59b6; }
    .card.teal   { border-left-color: #1abc9c; }
    .card.yellow { border-left-color: #f1c40f; }
    .card.dark   { border-left-color: #34495e; }
    .card.pink   { border-left-color: #fd79a8; }
    .card.cyan   { border-left-color: #00cec9; }
    
    .card-value--danger { color: #e74c3c; }
    
    .header {
    text-align: center;
    margin-bottom: 30px;
    }
    
    .logo {
        max-width: 160px;
        height: auto;
        margin-bottom: 10px;
    }