.app-layout {
    display: flex;
    flex: 1;
    width: 100%;
}

.app-container {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    min-width: 0; /* Permite que el contenedor se encoja por debajo del contenido intrínseco */
}

.glass-sidebar {
    width: 280px;
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--color-glass-border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: calc(100vh - 70px);
    position: sticky;
    top: 70px;
    overflow-y: auto;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1500;
    box-sizing: border-box;
}

.glass-sidebar.collapsed {
    width: 0;
    padding-left: 0;
    padding-right: 0;
    opacity: 0;
    border-right: none;
    overflow: hidden;
}

/* Mobile Overlay (Solo visible en móviles) */
#mobile-overlay {
    display: none;
}

.glass-sidebar h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.glass-sidebar label { font-size: 0.9rem; font-weight: 600; margin-bottom: -0.5rem; }
.glass-sidebar select {
    width: 100%;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.1);
    background: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.glass-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    height: 70px;
    background: var(--color-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.mobile-only-fab {
    display: none;
}

.nav-links {
    display: flex;
    gap: 1rem;
    height: 100%;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1rem;
    height: 100%;
    color: var(--color-text);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.nav-link:hover {
    background: rgba(255,255,255,0.2);
}

.nav-link.active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(255,255,255,0.3);
}

.nav-link svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

#btn-toggle-sidebar {
    display: none;
}

/* --- Tablets & Mobile (Max 1024px) --- */
@media (max-width: 1024px) {
    #btn-toggle-sidebar {
        display: block;
    }
    
    #btn-close-sidebar {
        display: flex !important;
    }
    
    .desktop-only-side-nav {
        display: none !important;
    }
    
    #mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 1400;
        transition: opacity 0.3s ease;
        display: block;
    }
    #mobile-overlay.hidden {
        display: none;
        opacity: 0;
    }
    
    .grid-2col { grid-template-columns: 1fr; }
    
    .glass-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 85%;
        max-width: 300px;
        transform: translateX(0);
        opacity: 1;
        padding: 1.5rem 1rem;
        border-right: 1px solid var(--color-glass-border);
    }
    
    .glass-sidebar.collapsed {
        transform: translateX(-100%);
        width: 85%;
        max-width: 300px;
        opacity: 1; 
    }

    .mobile-only-fab {
        display: flex;
        position: fixed;
        bottom: 1.5rem;
        right: 1.5rem;
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: var(--color-primary);
        color: white;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        z-index: 1001;
        border: none;
        cursor: pointer;
        transition: transform 0.3s ease;
    }
    .mobile-only-fab:active {
        transform: scale(0.95);
    }

    .nav-links {
        position: fixed;
        bottom: 85px;
        right: 1.5rem;
        left: auto;
        transform: none;
        width: 220px;
        max-width: calc(100vw - 3rem);
        height: auto;
        background: rgba(255, 255, 255, 0.98);
        border-radius: 15px;
        display: none; /* hidden by default */
        flex-direction: column;
        padding: 0.5rem;
        z-index: 1000;
        box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        border: 1px solid var(--color-glass-border);
    }
    .nav-links.active-fab-menu {
        display: flex;
    }
    
    .nav-links::-webkit-scrollbar {
        display: none;
    }
    
    .nav-link > span.nav-text {
        display: inline-block;
        margin-left: 0.5rem;
    }
    
    .nav-link > span.emoji-icon {
        display: inline-block;
        margin-right: 0.5rem;
    }

    .nav-link {
        flex-direction: row;
        justify-content: flex-start;
        padding: 0.75rem 1rem;
        font-size: 1rem;
        border: none;
        border-radius: 10px;
        width: 100%;
        margin-bottom: 0.25rem;
    }
    
    .nav-link.active {
        border: none;
        background: rgba(var(--color-primary-rgb), 0.1);
        transform: none;
    }
    
    
    .nav-link > svg, .nav-link > .emoji-icon {
        width: 24px;
        height: 24px;
    }

    .user-badge {
        display: none !important;
    }
    
    .glass-nav {
        padding: 0 1rem;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(255, 255, 255, 0.98);
    }

    .app-container {
        padding: 1rem;
        padding-bottom: 90px;
    }
}

.login-card { max-width: 400px; margin: 4rem auto; text-align: center; }

/* --- Mobile Specific Overrides --- */
@media (max-width: 768px) {
    .nav-brand span {
        display: none;
    }
}