/* ========== REGISTRO PROFESIONAL (BLANCO, NEGRO, DORADO) ========== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.register-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-body); /* Conectado al cerebro */
    padding: 40px 20px;
}

.register-container {
    max-width: 480px;
    width: 100%;
    background-color: var(--bg-card);
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

/* La línea superior elegante en Dorado */
.register-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: var(--accent-color);
}

        .back-button-container {
            margin-bottom: 20px;
        }

.register-header h2 {
    font-weight: 800;
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.register-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

        .register-header {
            text-align: center;
            margin-bottom: 30px;
        }

/* Ícono posicionado de forma fija para evitar saltos */
.input-group i {
    position: absolute;
    left: 18px;
    top: 27px;
    transform: translateY(-50%);
    font-size: 18px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    z-index: 1;
}

.input-group input {
    box-sizing: border-box;
    width: 100%;
    padding: 16px 20px 16px 55px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    background-color: var(--bg-card);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.input-group input:focus + i,
.input-group input:not(:placeholder-shown) + i {
    color: var(--accent-color);
    transform: translateY(-50%) scale(1.1);
}

.input-group input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

/* Validación visual de colores fijos (Semántica universal) */
.input-group.valid input { border-color: #27ae60; background: rgba(39, 174, 96, 0.05); }
.input-group.invalid input { border-color: #e74c3c; background: rgba(231, 76, 60, 0.05); }
.input-group.valid i { color: #27ae60; }
.input-group.invalid i { color: #e74c3c; }

        /* LÓGICA DE ERRORES */
        .error-message {
            color: #d9534f;
            font-weight: 600;
            font-size: 0.85rem;
            margin-top: 5px;
            display: none; /* Oculto por defecto */
        }
        
        .input-group.invalid .error-message {
            display: block; /* Solo se muestra si tiene clase invalid */
        }

        input:invalid {
            box-shadow: none; /* Previene estilos nativos feos */
        }

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Botón de Registro */
.btn-register {
    width: 100%;
    background-color: var(--accent-color);
    color: #000000; /* Texto negro sobre fondo dorado para máximo contraste premium */
    border: none;
    padding: 18px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px var(--accent-glow);
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

.btn-register:hover {
    transform: translateY(-2px);
    background-color: var(--accent-hover);
    box-shadow: 0 15px 30px var(--accent-glow);
}

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

.btn-register:disabled {
    background-color: var(--border-color);
    color: var(--text-secondary);
    cursor: not-allowed;
    box-shadow: none;
}

/* Link de login */
.login-link {
    text-align: center;
    margin-top: 25px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.login-link a {
    color: var(--accent-color);
    font-weight: 700;
    text-decoration: none;
    transition: color 0.3s ease;
}

.login-link a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* Indicador de fuerza de contraseña */
.password-strength {
    height: 4px;
    border-radius: 2px;
    margin-top: 8px;
    background: var(--border-color);
    overflow: hidden;
    display: none;
}

.password-strength-bar { height: 100%; width: 0; transition: all 0.3s ease; }
.input-group.has-password .password-strength { display: block; }

.strength-weak .password-strength-bar { width: 33%; background: #e74c3c; }
.strength-medium .password-strength-bar { width: 66%; background: #f39c12; }
.strength-strong .password-strength-bar { width: 100%; background: #27ae60; }

/* Loading spinner */
.btn-register .spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0,0,0,0.3);
    border-top-color: #000;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin { to { transform: rotate(360deg); } }
.btn-register.loading .btn-text { display: none; }
.btn-register.loading .spinner { display: block; }

/* Responsive */
@media (max-width: 576px) {
    .register-container { padding: 40px 30px; }
    .register-header h2 { font-size: 1.75rem; }
}
.btn-back {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: #666; /* Un gris suave */
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-back i {
    margin-right: 8px;
    font-size: 0.8rem;
}

.btn-back:hover {
    color: #d4af37; /* Cambia al dorado de tu marca al pasar el mouse */
    transform: translateX(-5px); /* Pequeño efecto de movimiento a la izquierda */
}