.app-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
}

.page-header {
    margin-bottom: var(--spacing-lg);
}

.page-header__title {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 5px;
    font-weight: 700;
}

.page-header__desc {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Mobile Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--color-surface);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    transition: color var(--transition-fast);
}

.nav-item i { font-size: 1.4rem; margin-bottom: 4px; }
.nav-item.active { color: var(--color-primary); }

/* --- RESPONSIVE DESKTOP --- */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
        padding-left: 280px; /* Sidebar width */
    }

    .bottom-nav {
        top: 0; left: 0; bottom: 0;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 40px;
        border-right: 1px solid var(--color-border);
        box-shadow: none;
        gap: 20px;
    }

    .nav-item {
        flex-direction: row;
        width: 80%;
        padding: 12px 20px;
        border-radius: var(--radius-md);
        gap: 15px;
        font-size: 1rem;
        font-weight: 600;
    }

    .nav-item:hover { background-color: #f1f5f9; color: var(--color-primary); }
    .nav-item.active { background-color: #eef2ff; color: var(--color-primary); }
    
    .app-container { padding-top: 40px; }
}