/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0; top: 0;
    z-index: 100;
    transition: all var(--transition-speed) ease;
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    min-height: var(--topbar-height);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
}

.logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, #3B82F6, #8B5CF6);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}

.logo-icon svg { width: 20px; height: 20px; color: #FFFFFF; }

.logo-text { display: flex; flex-direction: column; white-space: nowrap; overflow: hidden; }
.logo-title { font-size: 16px; font-weight: 700; color: var(--text-primary); line-height: 1.2; }
.logo-subtitle { font-size: 11px; color: var(--text-muted); }

.sidebar-toggle {
    width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all 0.2s;
    flex-shrink: 0;
}
.sidebar-toggle:hover { background-color: var(--bg-secondary); color: var(--text-primary); }
.sidebar-toggle svg { width: 18px; height: 18px; transition: transform 0.3s; }
.sidebar.collapsed .sidebar-toggle svg { transform: rotate(180deg); }

.sidebar-nav { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 12px; }

.nav-section { margin-bottom: 8px; }

.nav-section-title {
    display: block; padding: 8px 12px 4px;
    font-size: 10px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--text-muted); white-space: nowrap; overflow: hidden;
}

.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 12px; border-radius: var(--radius-md);
    color: var(--text-secondary); font-size: 13px; font-weight: 500;
    transition: all 0.2s ease; white-space: nowrap; position: relative;
}
.nav-item:hover { background-color: var(--bg-secondary); color: var(--text-primary); }
.nav-item.active { background-color: var(--accent-blue-light); color: var(--accent-blue); }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item span { overflow: hidden; text-overflow: ellipsis; }

.nav-badge {
    margin-left: auto; padding: 2px 8px; border-radius: 10px;
    font-size: 10px; font-weight: 600;
    background-color: var(--bg-tertiary); color: var(--text-muted);
}
.nav-item.active .nav-badge { background-color: rgba(59,130,246,0.2); color: var(--accent-blue); }

.sidebar-footer { border-top: 1px solid var(--border-color); padding: 12px 16px; }

.sidebar-user {
    display: flex; align-items: center; gap: 12px;
    padding: 8px; border-radius: var(--radius-md);
    transition: background-color 0.2s; cursor: pointer; overflow: hidden;
}
.sidebar-user:hover { background-color: var(--bg-secondary); }

.user-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 13px; color: #FFFFFF; flex-shrink: 0;
}

.user-info { display: flex; flex-direction: column; overflow: hidden; white-space: nowrap; }
.user-name { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.user-role { font-size: 11px; color: var(--text-muted); }

/* Collapsed */
.sidebar.collapsed { width: var(--sidebar-collapsed-width); }
.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-badge,
.sidebar.collapsed .user-info { opacity: 0; width: 0; overflow: hidden; }
.sidebar.collapsed .sidebar-header { padding: 16px; justify-content: center; }
.sidebar.collapsed .sidebar-logo { gap: 0; }
.sidebar.collapsed .sidebar-toggle { position: absolute; left: 50%; transform: translateX(-50%); top: 60px; }
.sidebar.collapsed .sidebar-nav { cursor: pointer; }
.sidebar.collapsed .nav-item { justify-content: center; padding: 10px; }
.sidebar.collapsed .sidebar-user { justify-content: center; padding: 8px 0; }
.sidebar.collapsed .sidebar-footer { padding: 12px 8px; }

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); z-index: 200; }
    .sidebar.mobile-open { transform: translateX(0); box-shadow: var(--shadow-xl); }
    .sidebar.collapsed { width: var(--sidebar-width); }
    .sidebar-toggle { display: none !important; }
    .sidebar.mobile-open .sidebar-toggle { display: none !important; }
}