/* Variables CSS para autenticación */
:root {
    --primary-blue: #352f62;
    --primary-orange: #e45504;
    --light-blue: #4a4374;
    --light-orange: #f76b1c;
    --dark-blue: #2a2550;
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-orange) 0%, var(--light-orange) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-orange) 100%);
    --shadow-light: 0 4px 6px rgba(53, 47, 98, 0.1);
    --shadow-medium: 0 8px 25px rgba(53, 47, 98, 0.15);
    --shadow-heavy: 0 15px 35px rgba(53, 47, 98, 0.2);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

/* Contenedor principal */
.auth-container {
    width: 100%;
    max-width: 1200px;
    margin: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-heavy);
    overflow: hidden;
    min-height: 600px;
}

@media (max-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr;
        margin: 1rem;
        max-width: 400px;
    }
}

/* Panel izquierdo - Branding */
.auth-brand {
    background: var(--gradient-hero);
    color: white;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.auth-brand::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" fill="rgba(255,255,255,0.05)"><circle cx="200" cy="200" r="100"/><circle cx="800" cy="300" r="150"/><circle cx="300" cy="700" r="80"/><circle cx="700" cy="800" r="120"/></svg>');
    background-size: cover;
}

.auth-brand-content {
    position: relative;
    z-index: 2;
}

.auth-logo {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.3);
}

.auth-logo i {
    font-size: 2.5rem;
    color: white;
}

.auth-brand h1 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.auth-brand p {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.auth-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.auth-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    opacity: 0.9;
}

.auth-feature i {
    width: 20px;
    text-align: center;
    color: var(--primary-orange);
}

@media (max-width: 768px) {
    .auth-brand {
        padding: 2rem;
        min-height: 300px;
    }
    
    .auth-brand h1 {
        font-size: 2rem;
    }
    
    .auth-features {
        display: none;
    }
}

/* Panel derecho - Formulario */
.auth-form {
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@media (max-width: 768px) {
    .auth-form {
        padding: 2rem;
    }
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    color: var(--primary-blue);
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: #6b7280;
    font-size: 1rem;
}

/* Formulario */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f9fafb;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-orange);
    background: white;
    box-shadow: 0 0 0 3px rgba(228, 85, 4, 0.1);
}

.form-control.error {
    border-color: #ef4444;
    background: #fef2f2;
}

.form-control.success {
    border-color: #10b981;
    background: #f0fdf4;
}

/* Input con icono */
.input-group {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 1.1rem;
    z-index: 2;
}

.input-group .form-control {
    padding-left: 3rem;
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    font-size: 1.1rem;
    z-index: 2;
    transition: color 0.3s ease;
}

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

/* Mensajes de error/éxito */
.form-message {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-message.error {
    color: #ef4444;
}

.form-message.success {
    color: #10b981;
}

.form-message i {
    font-size: 1rem;
}

/* Alertas */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.alert.success {
    background: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert.error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert.info {
    background: #eff6ff;
    color: #1d4ed8;
    border: 1px solid #bfdbfe;
}

.alert i {
    font-size: 1.1rem;
}

/* Botones */
.btn {
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-outline:hover {
    background: var(--primary-blue);
    color: white;
}

.btn-full {
    width: 100%;
}

.btn-loading {
    position: relative;
    color: transparent;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Enlaces */
.auth-link {
    color: var(--primary-orange);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.auth-link:hover {
    color: var(--light-orange);
    text-decoration: underline;
}

/* Divisor */
.divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: #9ca3af;
    font-size: 0.875rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e5e7eb;
}

.divider span {
    padding: 0 1rem;
}

/* Footer del formulario */
.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e7eb;
    color: #6b7280;
    font-size: 0.9rem;
}

/* Checkbox personalizado */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
}

.checkbox {
    position: relative;
    width: 20px;
    height: 20px;
}

.checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkbox-custom {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    background: #f9fafb;
    border: 2px solid #e5e7eb;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.checkbox input:checked ~ .checkbox-custom {
    background: var(--primary-orange);
    border-color: var(--primary-orange);
}

.checkbox-custom::after {
    content: '';
    position: absolute;
    display: none;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox input:checked ~ .checkbox-custom::after {
    display: block;
}

.checkbox-label {
    font-size: 0.9rem;
    color: #374151;
    cursor: pointer;
}

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

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* Validación en tiempo real */
.form-control.validating {
    border-color: #f59e0b;
    background: #fffbeb;
}

.strength-meter {
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.strength-weak { background: #ef4444; width: 25%; }
.strength-fair { background: #f59e0b; width: 50%; }
.strength-good { background: #10b981; width: 75%; }
.strength-strong { background: #059669; width: 100%; }

/* Responsive mejoras */
@media (max-width: 480px) {
    .auth-container {
        margin: 0.5rem;
        border-radius: 15px;
    }
    
    .auth-form {
        padding: 1.5rem;
    }
    
    .auth-header h2 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 1rem 1.5rem;
    }
}

/* Estados de carga */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}