body {
    font-family: 'Montserrat', sans-serif;
    background-color: #111827;
    color: #d1d5db;
    overflow: hidden;
    /* Evita el scroll en la página de login */
}

/* --- Contenedor Principal --- */
.main-container {
    display: grid;
    grid-template-columns: 40% 60%;
    height: 100vh;
    width: 100vw;
}

/* --- Lado del Formulario --- */
.form-side {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    flex-direction: column;
}

/* --- EL EFECTO "PRISMATICA" --- */
.auth-card {
    background-color: rgba(17, 24, 39, 0.75);
    /* Fondo oscuro semitransparente */
    backdrop-filter: blur(12px);
    /* El efecto de desenfoque clave */
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 450px;
}

/* --- Transiciones para formularios --- */
#login-form,
#register-form {
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
    opacity: 1;
    transform: translateX(0);
}

#login-form.hidden,
#register-form.hidden {
    opacity: 0;
    transform: translateX(20px);
}

/* --- Estilos para tabs con transiciones --- */
.tab-btn {
    transition: all 0.3s ease-in-out;
    position: relative;
    overflow: hidden;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #EF4444;
    transition: width 0.3s ease-in-out;
}

.tab-btn.active::after {
    width: 100%;
}

.tab-btn.active {
    color: #EF4444 !important;
    transform: translateY(-1px);
}

/* --- Estilos para validación de foto --- */
#register-photo-preview.border-red-500 {
    border-color: #EF4444 !important;
    box-shadow: 0 0 0 1px #EF4444;
}

#register-photo-preview.border-green-500 {
    border-color: #10B981 !important;
    box-shadow: 0 0 0 1px #10B981;
}

/* --- Estilos para enlace de recuperación de contraseña --- */
#forgot-password-link {
    transition: opacity 0.2s ease-in-out;
}

#forgot-password-link:disabled,
#forgot-password-link[style*="pointer-events: none"] {
    opacity: 0.6;
    cursor: not-allowed;
}

/* --- Estilos para el paso de resumen --- */
.form-step[data-step="4"] .space-y-4 {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 8px;
}

.form-step[data-step="4"] .space-y-4::-webkit-scrollbar {
    width: 4px;
}

.form-step[data-step="4"] .space-y-4::-webkit-scrollbar-track {
    background: #374151;
    border-radius: 2px;
}

.form-step[data-step="4"] .space-y-4::-webkit-scrollbar-thumb {
    background: #6B7280;
    border-radius: 2px;
}

.form-step[data-step="4"] .space-y-4::-webkit-scrollbar-thumb:hover {
    background: #9CA3AF;
}

/* --- Grid de Imágenes de Fondo --- */
.background-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
    height: 100vh;
    width: 100%;
    overflow: hidden;
    position: relative;
    /* Para el overlay */
    gap: 0.5rem;
    /* <<< ¡CAMBIO AÑADIDO! Este es el hueco entre imágenes. */
    padding: 0.5rem;
    /* <<< ¡CAMBIO AÑADIDO! Añade un pequeño margen alrededor del grid. */
}

/* Capa oscura sobre todas las imágenes */
.background-grid::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, #111827 0%, rgba(17, 24, 39, 0.7) 50%, rgba(17, 24, 39, 0.9) 100%);
    z-index: 1;
    /* Asegura que el gradiente esté sobre las imágenes */
}

.grid-image-container {
    overflow: hidden;
    position: relative;
    border-radius: 0.5rem;
    /* <<< ¡CAMBIO AÑADIDO! Redondea los bordes. */
}

.grid-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(50%) brightness(0.7);
    /* Desaturado y oscuro */
    transition: transform 0.4s ease-in-out, filter 0.4s ease;
}

.grid-image-container:hover img {
    transform: scale(1.05);
    filter: grayscale(0%) brightness(0.9);
}

/* --- Estilos del Formulario (adaptados del original) --- */
.custom-input {
    background-color: #374151;
    border: 1px solid #4B5563;
    color: white;
    transition: all 0.3s ease;
}

.custom-input:focus {
    outline: none;
    border-color: #EF4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.5);
}

.custom-btn {
    background: linear-gradient(90deg, #EF4444, #DC2626);
    color: white;
    font-weight: 600;
    border: none;
    transition: all 0.3s ease-in-out;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.custom-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.custom-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tab-btn {
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: #EF4444;
    border-bottom-color: #EF4444;
}

.password-toggle-icon {
    position: absolute;
    top: 50%;
    right: 0.75rem;
    transform: translateY(-50%);
    cursor: pointer;
    color: #9CA3AF;
}

#notification {
    transition: transform 0.5s ease-in-out, opacity 0.5s ease-in-out;
    transform: translateY(-150%);
    opacity: 0;
}

#notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Estilos del formulario por pasos (sin cambios) */
.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #6B7280;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 80px;
    text-align: center;
}

.step-icon {
    height: 40px;
    width: 40px;
    border-radius: 50%;
    background-color: #374151;
    border: 2px solid #4B5563;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.step-label {
    font-size: 0.8rem;
    text-transform: uppercase;
}

.step-line {
    flex-grow: 1;
    height: 2px;
    background-color: #4B5563;
    margin: 0 -10px;
    transform: translateY(-28px);
    transition: background-color 0.4s ease;
}

.step-indicator.active {
    color: #EF4444;
}

.step-indicator.active .step-icon {
    border-color: #EF4444;
}

.step-indicator.completed {
    color: #10B981;
}

.step-indicator.completed .step-icon {
    background-color: #10B981;
    border-color: #10B981;
    color: white;
}

/* --- Responsive para Móviles --- */
@media (max-width: 1024px) {
    body {
        overflow: auto;
        /* Permitir scroll en móvil */
    }

    .main-container {
        grid-template-columns: 1fr;
        /* Una sola columna */
    }

    .form-side {
        padding: 1.5rem;
        min-height: 100vh;
        /* Asegura que el formulario ocupe la pantalla */
    }

    .background-grid {
        position: fixed;
        /* Fija el fondo */
        top: 0;
        left: 0;
        z-index: -1;
        /* Lo manda detrás de todo */
        opacity: 0.3;
        /* Lo hace más sutil en móviles */
    }
}
#install-pwa-banner {
    /* Por defecto, el banner está oculto debajo de la pantalla */
    transform: translateY(150%);
    transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1); /* Animación suave */

    /* Añade el padding-bottom seguro para iPhones con notch */
    padding-bottom: calc(1rem + env(safe-area-inset-bottom));
}

#install-pwa-banner.show {
    /* Cuando tiene la clase 'show', se desliza a su posición visible */
    transform: translateY(0);
}
#install-pwa-ios img {
    /* Invierte el color (negro -> blanco) y le da más brillo */
    filter: invert(1) brightness(2);
}