:root {
    --azul: #0A132D;
    --azul-clave: #006CB7;
    --azul-clave-hover: #005A99;
    --rosa-admin: #E63262;
    --rosa-admin-hover: #C92752;
    --blanco: #FFFFFF;
    --gris: #F7F7F7;
    --texto: #111111;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #006FB3, #0A132D);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    padding: 25px;
}

.login-box {
    width: 100%;
    max-width: 520px;
    margin: auto;
    background: var(--blanco);
    padding: 38px;
    border-top: 6px solid var(--azul);
    box-shadow: 0 25px 55px rgba(0,0,0,.28);
}

.logo-area {
    text-align: center;
    margin-bottom: 28px;
}

    .logo-area img {
        width: 120px;
        height: auto;
        object-fit: contain;
        display: block;
        margin: 0 auto 15px;
    }

    .logo-area h1 {
        margin: 0;
        color: var(--azul);
        font-size: 28px;
    }

    .logo-area p {
        margin-top: 8px;
        color: #555;
    }

.login-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.option-btn {
    padding: 14px;
    border: none;
    background: #E9EEF5;
    color: var(--azul);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
}

    .option-btn.active {
        background: var(--azul);
        color: white;
    }

.login-form-area {
    display: none;
    background: var(--gris);
    padding: 28px;
    border-left: 5px solid var(--azul);
}

    .login-form-area.active {
        display: block;
    }

    .login-form-area h2 {
        margin-top: 0;
        color: var(--azul);
        font-size: 25px;
    }

    .login-form-area p {
        color: #444;
        margin-bottom: 20px;
        line-height: 1.5;
    }

    .login-form-area label {
        display: block;
        margin-bottom: 7px;
        color: var(--texto);
        font-weight: 700;
    }

    .login-form-area input {
        width: 100%;
        padding: 13px;
        margin-bottom: 16px;
        border: 1px solid #ccc;
        font-size: 15px;
    }

        .login-form-area input:focus {
            outline: none;
            border-color: var(--azul);
        }

.btn-claveunica {
    width: 100%;
    padding: 14px;
    background: var(--azul-clave);
    color: #fff;
    border: 1px solid #2A8AD5;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

    .btn-claveunica:hover {
        background: var(--azul-clave-hover);
    }

.cu-icon {
    font-size: 20px;
    line-height: 1;
}

.btn-admin {
    width: 100%;
    padding: 14px;
    background: var(--rosa-admin);
    color: #fff;
    border: 1px solid #F06A8F;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
}

    .btn-admin:hover {
        background: var(--rosa-admin-hover);
    }

.error {
    background: #FFE5E5;
    color: #9B0000;
    padding: 12px;
    margin-bottom: 18px;
    text-align: center;
    font-weight: 700;
}

.volver {
    display: block;
    margin-top: 26px;
    text-align: center;
    color: var(--azul);
    font-weight: 700;
    text-decoration: none;
}

    .volver:hover {
        text-decoration: underline;
    }

@media (max-width: 600px) {
    .login-box {
        padding: 28px;
    }

    .login-options {
        grid-template-columns: 1fr;
    }
}
.login-form-area input {
    height: 46px;
    line-height: 46px;
}

    .login-form-area input:focus {
        outline: none;
        border: 1px solid var(--azul);
        box-shadow: 0 0 0 3px rgba(0, 108, 183, 0.15);
    }