.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;
}

/* PATCH_v2: Floating Glass Navigation */
.bottom-nav {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    width: 92%; max-width: 500px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-radius: 24px;
    box-shadow: 0 15px 35px -5px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.6);
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 15px; z-index: 1000;
}

.nav-item {
    display: flex; flex-direction: column; align-items: center;
    color: #94a3b8; font-size: 0.65rem; font-weight: 600;
    cursor: pointer; position: relative; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 5px 0; width: 16%;
}

.nav-item i { font-size: 1.3rem; margin-bottom: 3px; transition: 0.3s; }
.nav-item.active { color: var(--color-primary); }
.nav-item.active i { transform: translateY(-5px); filter: drop-shadow(0 4px 6px rgba(99, 102, 241, 0.4)); }
.nav-item.active::after {
    content: ''; position: absolute; bottom: -5px;
    width: 5px; height: 5px; background: var(--color-primary);
    border-radius: 50%;
}

/* --- RESPONSIVE DESKTOP --- */
/* PATCH_v2: Fix Desktop Layout */
@media (min-width: 768px) {
    body {
        padding-bottom: 0;
        padding-left: 280px; /* Chừa chỗ cho Sidebar */
        background-color: #f1f5f9; /* Nền xám nhẹ cho PC pro hơn */
    }

    .bottom-nav {
        top: 0; left: 0; bottom: 0;
        width: 280px;
        height: 100vh;
        transform: none; /* Reset transform center của mobile */
        border-radius: 0; /* Bỏ bo góc mobile */
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 40px;
        border-right: 1px solid #e2e8f0;
        box-shadow: none;
        gap: 10px;
        z-index: 100;
    }

    .nav-item {
        flex-direction: row;
        width: 90%;
        padding: 14px 25px;
        border-radius: 0 24px 24px 0; /* Bo góc phải */
        gap: 15px;
        font-size: 1rem;
        font-weight: 600;
        margin: 0;
    }

    .nav-item:hover { background-color: #f8fafc; color: var(--color-primary); }
    .nav-item.active { 
        background-color: #eef2ff; 
        color: var(--color-primary);
        border-right: 3px solid var(--color-primary);
    }
    
    .app-container { 
        padding-top: 40px; 
        max-width: 1000px; /* Giới hạn chiều rộng để nội dung không bị bè */
        margin-left: auto;
        margin-right: auto;
    }
}