/* =====================================================
   ESTILOS DE LOGIN - DISEÑO MODERNO
   ===================================================== */

:root {
    --primary-color: #2ecc71;
    --primary-dark: #27ae60;
    --secondary-color: #3498db;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 50px rgba(0, 0, 0, 0.15);
}

* {
    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;
    position: relative;
    overflow: hidden;
}

/* Fondo animado */
.login-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(46, 204, 113, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(52, 152, 219, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Contenedor principal */
.login-container {
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease-out;
}

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

/* Tarjeta de login */
.login-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.login-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

/* Header del login */
.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo-container {
    margin-bottom: 20px;
}

.logo-icon {
    font-size: 60px;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 14px;
    color: #7f8c8d;
    margin: 0;
}

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

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

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
    display: block;
    font-size: 14px;
}

.form-control {
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    width: 100%;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(46, 204, 113, 0.15);
    outline: none;
}

/* Input de password con botón de mostrar/ocultar */
.password-input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-group .form-control {
    padding-right: 45px;
}

.btn-toggle-password {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    color: #7f8c8d;
    cursor: pointer;
    padding: 8px;
    transition: color 0.3s ease;
}

.btn-toggle-password:hover {
    color: var(--primary-color);
}

/* Checkbox */
.form-check {
    margin-bottom: 25px;
}

.form-check-input {
    cursor: pointer;
    border: 2px solid #e0e0e0;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-label {
    cursor: pointer;
    font-size: 14px;
    color: #7f8c8d;
}

/* Botón de login */
.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 10px;
    color: var(--white);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(46, 204, 113, 0.3);
}

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

.btn-login:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

/* Alertas personalizadas */
.alert {
    border-radius: 10px;
    margin-bottom: 20px;
    border: none;
    animation: slideDown 0.4s ease-out;
}

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

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

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

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
}

/* Spinner de carga */
.spinner-border-sm {
    width: 18px;
    height: 18px;
    border-width: 2px;
}

/* Responsive */
@media (max-width: 576px) {
    .login-card {
        padding: 30px 20px;
    }

    .login-title {
        font-size: 24px;
    }

    .logo-icon {
        font-size: 50px;
    }
}