:root {
        --marron: #8b6f47;
        --marron-dark: #6e5432;
        --beige: #f4ede4;
        --beige-card: #fff9f3;
        --accent: #b29366;
        --muted: #5a4326;
    }

    body {
        background: var(--beige);
        font-family: 'Poppins', system-ui, Arial;
        color: #4b3b2b;
        margin: 0;
    }

    /* Sidebar */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        width: 220px;
        background: linear-gradient(180deg, var(--marron) 0%, #b48a5a 100%);
        color: white;
        padding: 18px 12px;
        box-shadow: 2px 0 12px rgba(0, 0, 0, 0.12);
        transition: transform 0.3s ease;
        z-index: 1000;
    }

    .cta-link {
        display: inline-block;
        width: fit-content;
        margin: 30px auto 0;
        padding: 14px 28px;
        background: #b48a5a;
        color: #fff;
        text-decoration: none;
        border-radius: 10px;
        font-weight: bold;
        font-size: 1.1rem;
        transition: all 0.3s ease;
    }

    .cta-link:hover {
        background: #99734e;
        transform: scale(1.05);
    }

    .sidebar .logo {
        width: 48px;
        display: block;
        margin: 0 auto 10px;
    }

    .sidebar nav ul {
        list-style: none;
        padding: 0;
        margin: 12px 0 0 0;
    }

    .sidebar nav a {
        color: white;
        text-decoration: none;
        display: block;
        padding: 10px 8px;
        border-radius: 8px;
        margin-bottom: 6px;
        font-weight: 600;
    }

    .sidebar nav a:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    /* Toggle button */
    #menu-toggle {
        display: none;
        font-size: 1.8rem;
        cursor: pointer;
        position: fixed;
        top: 12px;
        left: 12px;
        z-index: 1100;
        color: var(--marron-dark);
    }

    .main-content {
        margin-left: 19vw;
        margin-right: 3vw;
        padding: 28px;
        min-height: 100vh;
        transition: margin-left 0.3s ease;
        background-color: #fff;
        border-radius: 25px;
    }

    .card-form {
        background: var(--beige-card);
        border-radius: 12px;
        padding: 18px;
        box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
    }

    .section-title {
        font-weight: 700;
        font-size: 1.3rem;
        color: #2d2d2d;
        margin-bottom: 12px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
        padding-bottom: 6px;
    }



    table thead {
        background: var(--accent);
        color: white;
    }

    .no-data {
        text-align: center;
        color: #666;
        padding: 28px;
        background: #fff;
        border-radius: 10px;
    }

    .btn {
        font-weight: bold;
        border-radius: 8px;
        color: white;
        background: var(--accent);
    }

    .btn:hover {
        background: #9b7447;
    }

    /* Fondo animado de patitas */
    #paw-container {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
        z-index: -1;
    }

    .paw-bg {
        position: absolute;
        width: 8vw;
        /* ancho relativo a pantalla */
        height: auto;
        max-width: 56px;
        opacity: 0.3;
        pointer-events: none;
        transition: transform 0.8s cubic-bezier(.4, 2, .6, 1);
    }


    /* Responsive */
    @media(max-width:768px) {
        .sidebar {
            transform: translateX(-100%);
            position: fixed;
        }

        .sidebar.active {
            transform: translateX(0);
        }

        #menu-toggle {
            display: block;
        }

        .main-content {
            margin-left: 3vw;
            padding: 20px;
        }
    }