/* ========================================
   ESTILOS PARA PÁGINA DE LOGIN
   ======================================== */

:root {
    --primary-color: #dc3545;
    --primary-dark: #bd2130;
    --danger-color: #dc3545;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* Reset y estilos generales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Contenedor principal del login */
.login-container {
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tarjeta de login */
.login-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

/* Header del login */
.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.login-header i {
    color: white;
    opacity: 0.9;
}

.login-header h2 {
    margin: 10px 0;
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 1px;
}

.login-header p {
    margin: 5px 0 0 0;
    opacity: 0.9;
    font-size: 14px;
}

/* Body del login */
.login-body {
    padding: 30px;
}

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

.form-group:last-of-type {
    margin-bottom: 25px;
}

.input-group-text {
    background-color: var(--light-color);
    border: 1px solid #ced4da;
    color: var(--dark-color);
    min-width: 45px;
    justify-content: center;
}

.form-control {
    border: 1px solid #ced4da;
    padding: 12px 15px;
    font-size: 15px;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.input-group-append .btn {
    border-left: none;
}

/* Checkbox */
.form-check {
    margin-bottom: 20px;
    padding-left: 1.5rem;
}

.form-check-label {
    font-size: 14px;
    color: #666;
    user-select: none;
    cursor: pointer;
}

/* Botón de login */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    padding: 12px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 123, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 123, 255, 0.4);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #003d82 100%);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Botón de mostrar/ocultar contraseña */
#togglePassword {
    background-color: white;
    border: 1px solid #ced4da;
    border-left: none;
    color: #6c757d;
    transition: var(--transition);
}

#togglePassword:hover {
    background-color: var(--light-color);
    color: var(--dark-color);
}

/* Footer del login */
.login-footer {
    background-color: var(--light-color);
    padding: 20px 30px;
    text-align: center;
    border-top: 1px solid #dee2e6;
}

.login-footer p {
    margin-bottom: 5px;
    color: #6c757d;
}

.login-footer small {
    font-size: 13px;
}

.login-footer strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* Alertas */
#alert-container {
    margin-bottom: 20px;
}

.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 12px 15px;
    font-size: 14px;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-dismissible .close {
    padding: 0.5rem 0.75rem;
    color: inherit;
    opacity: 0.5;
}

.alert-dismissible .close:hover {
    opacity: 1;
}

/* Loading spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

/* Responsive */
@media (max-width: 576px) {
    .login-container {
        max-width: 100%;
    }
    
    .login-header {
        padding: 30px 20px;
    }
    
    .login-header h2 {
        font-size: 24px;
    }
    
    .login-body {
        padding: 20px;
    }
    
    .login-footer {
        padding: 15px 20px;
    }
}

/* Animaciones adicionales */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s;
}

/* Efectos de hover en inputs */
.input-group:focus-within .input-group-text {
    border-color: var(--primary-color);
    background-color: rgba(0, 123, 255, 0.05);
}

/* Iconos */
.fa-eye, .fa-eye-slash {
    transition: var(--transition);
}