/* Estilos base */
html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: #f8fafc;
}

/* Estilos de login */
.login-background {
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(31, 38, 135, 0.15);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    margin: auto;
    transform: translateY(-5%);
}

.welcome-icon {
    text-align: center;
    margin-bottom: 1.5rem;
}

.welcome-icon i {
    font-size: 3.5rem;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.login-header {
    color: #2c3e50;
    font-size: 2.2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.login-subtitle {
    color: #64748b;
    font-size: 1rem;
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-field {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    color: #334155;
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.login-field .input-group {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-field .input-group:focus-within {
    border-color: #4a90e2;
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

.login-field .input-group-text {
    background-color: transparent;
    border: none;
    color: #94a3b8;
    padding: 0.75rem 1rem;
}

.login-field .form-control {
    border: none;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: #1e293b;
    background: transparent;
}

.login-field .form-control::placeholder {
    color: #94a3b8;
}

.login-field .form-control:focus {
    box-shadow: none;
    outline: none;
}

.validation-message {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.5rem;
    display: block;
}

.login-button {
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    border: none;
    padding: 1rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
}

.login-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.25);
}

.login-button:disabled {
    background: linear-gradient(135deg, #a8c6e5 0%, #89a7c9 100%);
    cursor: not-allowed;
}

.login-divider {
    text-align: center;
    margin: 2rem 0;
    position: relative;
}

.login-divider::before,
.login-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 35%;
    height: 1px;
    background: linear-gradient(to right, transparent, #e2e8f0);
}

.login-divider::before {
    left: 0;
    background: linear-gradient(to right, #e2e8f0, transparent);
}

.login-divider::after {
    right: 0;
}

.login-divider span {
    background-color: white;
    padding: 0 1rem;
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
}

.help-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.help-link {
    color: #64748b;
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.help-link:hover {
    color: #4a90e2;
    transform: translateY(-1px);
}

.help-link i {
    font-size: 1rem;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
}

.login-footer small {
    color: #94a3b8;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.alert {
    border: none;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    padding: 1rem;
}

.alert-danger {
    background-color: #fef2f2;
    color: #dc2626;
    border-left: 4px solid #dc2626;
}

.alert .btn-close {
    font-size: 0.8rem;
    padding: 0.5rem;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

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

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    margin-right: 0.5rem;
}

/* Estilos responsive */
@media (max-width: 768px) {
    .login-background {
        padding: 1rem;
    }

    .login-card {
        padding: 1.5rem;
        transform: none;
    }

    .help-links {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .login-header {
        font-size: 1.8rem;
    }

    .welcome-icon i {
        font-size: 3rem;
    }
}