:root {
    --azul-hll: #003366;
    --amarillo-hll: #FFCC00;
    --blanco: #FFFFFF;
    --gris-claro: #F4F6F9;
    --texto-oscuro: #1E293B;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: var(--gris-claro);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background-color: var(--blanco);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 51, 102, 0.1);
    width: 100%;
    max-width: 400px;
    box-sizing: border-box;
}

/* Distribución simétrica de logotipos */
.logo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--gris-claro);
}

.logo-header img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.site-title {
    text-align: center;
    color: var(--azul-hll);
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--texto-oscuro);
    font-weight: 600;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #CBD5E1;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--amarillo-hll);
}

.btn-login {
    width: 100%;
    background-color: var(--azul-hll);
    color: var(--blanco);
    border: none;
    padding: 14px;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-login:hover {
    background-color: #002244;
}

.alert-danger {
    background-color: #FEE2E2;
    color: #DC2626;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    text-align: center;
    border: 1px solid #FCA5A5;
}