/* css/layout.css */

/* App Container Layout */
#app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar Layout */
#sidebar {
    width: var(--sidebar-width);
    height: 100%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
}

.sidebar-header .logo i {
    font-size: 1.5rem;
}

.sidebar-scrollable {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 1rem;
}

.nav-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    color: var(--text-muted);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-item:hover {
    background: var(--bg-card-hover);
    color: var(--primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: var(--bg-gradient-primary);
    background-image: linear-gradient(135deg, rgba(30, 58, 138, 0.1), rgba(59, 130, 246, 0.1));
    color: var(--primary);
    border: 2px solid var(--primary);
    font-weight: 700;
}

[data-theme="dark"] .nav-item.active {
    background-image: linear-gradient(135deg, rgba(96, 165, 250, 0.2), rgba(59, 130, 246, 0.1));
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-mini-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-mini-profile .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--border-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-level {
    font-size: 0.8rem;
    font-weight: 700;
}

/* Main Content Area */
#main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
    position: relative;
    scroll-behavior: smooth;
}

/* Topbar */
#topbar {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-main);
    position: sticky;
    top: 0;
    z-index: 90;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(248, 250, 252, 0.8);
}

[data-theme="dark"] #topbar {
    background-color: rgba(15, 23, 42, 0.8);
}

.search-bar {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-full);
    padding: 0.5rem 1rem;
    width: 300px;
    transition: all var(--transition-fast);
}

.search-bar:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.search-bar i {
    color: var(--text-muted);
    margin-right: 0.5rem;
}

.search-bar input {
    border: none;
    background: none;
    width: 100%;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.streak-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius-full);
    border: 1px solid var(--border);
    font-weight: 700;
}

/* View Container (Router Output) */
#view-container {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Footer */
#footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* Responsive Design */
.mobile-only {
    display: none;
}

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }
    .search-bar { width: 250px; }
}

@media (max-width: 768px) {
    .mobile-only {
        display: block;
    }
    
    #sidebar {
        position: fixed;
        left: 0;
        top: 0;
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }
    
    #sidebar.open {
        transform: translateX(0);
    }
    
    .search-bar { display: none; }
    
    #view-container {
        padding: 1.5rem;
    }
}