/* === BACKGROUND SLIDER === */
.login-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.login-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%);
    z-index: 2;
}

.bg-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 2s ease-in-out;
    animation: kenburns 15s ease infinite;
}

.bg-slide.active {
    opacity: 1;
    z-index: 1;
}

/* Efecto Ken Burns (zoom suave) */
@keyframes kenburns {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* === CARD DE LOGIN === */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
    animation: slideInUp 0.6s ease;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card .card-body {
    padding: 3rem;
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    text-align: center;
}

.login-subtitle {
    color: #7f8c8d;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* === FORMULARIO === */
.form-control {
    border-radius: 10px;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.btn-login {
    border-radius: 10px;
    padding: 12px;
    font-weight: 600;
    font-size: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

/* === ALERT PERSONALIZADO === */
.alert {
    border-radius: 10px;
    border: none;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* === RESPONSIVE === */
@media (max-width: 576px) {
    .login-card .card-body {
        padding: 2rem 1.5rem;
    }
    
    .login-title {
        font-size: 1.5rem;
    }
}

/* === LOGO (opcional) === */
.login-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: block;
    border-radius: 50%;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}