* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: url('../img/PORTADA_WEB_3.png') no-repeat center center fixed;
    background-size: cover;
    position: relative;
}

.login-container {
    width: 400px;
    height: 600px;
    background-color: #fff;
    border-radius: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: fadeIn 0.8s ease;
}

.logo {
    background-color: #0e4b95;
    padding: -8px 0;
    text-align: center;
}

.logo img {
    width: 180px;
    height: 180px;
}

.login-form {
    padding: 30px;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-weight: 600;
    font-size: 28px;
    position: relative;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, #6e8efb, #a777e3);
    border-radius: 2px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #3b2929;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px 15px 12px 40px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group i.fa-user,
.form-group i.fa-lock {
    position: absolute;
    left: 15px;
    top: 44px;
    color: #040404;
}


.form-group input:focus {
    border-color: #6e8efb;
    outline: none;
    box-shadow: 0 0 0 3px rgba(110, 142, 251, 0.1);
    background-color: rgba(255, 255, 255, 0.95);
}

.form-group input:focus + .password-toggle {
    color: #6e8efb;
}

.password-toggle {
    position: absolute;
    right: 18px;
    top: 48px;
    background: none;
    border: none;
    color: #777;
    cursor: pointer;
    padding: 0;
    font-size: 18px;
    transition: all 0.3s ease;
    z-index: 10;
}

.password-toggle:hover {
    color: #6e8efb;
    transform: scale(1.1);
}

.options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    font-size: 14px;
}

.forgot-password {
    color: #1766c6;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
}

.forgot-password:hover {
    text-decoration: underline;
    color: #1766c6;
    transform: translateX(2px);
}

.login-button {
    color: white;    
    background: #1766c6;
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 25px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.login-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.login-button:hover::before {
    left: 100%;
}

.login-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(110, 142, 251, 0.4);
    background: #1766c6;
}

.login-button:active {
    transform: translateY(-1px);
}

.login-button:disabled {
    cursor: not-allowed;
    opacity: 0.7;
    transform: none;
}

.system-info {
    text-align: center;
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #121111;
    font-size: 14px;
    font-weight: 500;
}

.system-info i {
    color: #121111;
    font-size: 14px;
}

.design-credit {
    text-align: center;
    font-size: 14px;
    color: #888;
    padding: 15px;
    background: linear-gradient(135deg, rgba(110, 142, 251, 0.05), rgba(167, 119, 227, 0.05));
    border-top: 1px solid rgba(110, 142, 251, 0.1);
    font-weight: 500;
}

/* Estilos para mensajes de error mejorados */
.custom-alert {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 500;
    box-shadow: 0 8px 25px rgba(238, 90, 82, 0.3);
    transform: translateY(-10px);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 15px 20px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
}

.custom-alert.show {
    transform: translateY(0);
    opacity: 1;
}

.custom-alert.fade-out {
    transform: translateY(-20px);
    opacity: 0;
}

.custom-alert i.fa-exclamation-triangle {
    font-size: 18px;
    animation: pulse 1.5s infinite;
}

.custom-alert .btn-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0;
    margin-left: auto;
    font-size: 16px;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.custom-alert .btn-close:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes shimmer {
    0% { transform: rotate(0deg) translate(-50%, -50%); }
    100% { transform: rotate(360deg) translate(-50%, -50%); }
}

/* Responsive Design */
@media (max-width: 480px) {
    .login-container {
        width: 95%;
        margin: 20px;
    }
    
    .login-form {
        padding: 30px 25px;
    }
    
    .logo {
        padding: 25px 0;
    }
    
    .logo img {
        width: 100px;
        height: 100px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .form-group input {
        padding: 12px 15px 12px 45px;
    }
    
    .form-group i.fa-user,
    .form-group i.fa-lock {
        left: 15px;
        top: 45px;
        font-size: 16px;
    }
    
    .password-toggle {
        right: 15px;
        top: 45px;
        font-size: 16px;
    }
}

/* Validación visual en tiempo real */
.form-group input.valid {
    border-color: #4CAF50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-group input.invalid {
    border-color: #ff6b6b;
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

/* Estados de hover para mejorar la interactividad */
.form-group:hover {
    transform: translateY(-1px);
}

.options:hover .remember-me label {
    color: #333;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}