/* ========================================
   SIDEBAR
======================================== */

.sidebar {
    position: fixed;
    top: 60px; /* height of header */
    left: 0;

    width: var(--sidebar-width);
    height: calc(100vh - 60px);

    background: var(--surface);
    border-right: 1px solid var(--border);
    box-shadow: 2px 0 6px rgba(0, 0, 0, 0.1);

    padding: var(--space-lg);
    overflow-y: auto;
}

.nav-title {
    font-size: 12px;
    text-transform: uppercase;
    color: #64748b;
    margin-top: 20px;
    margin-bottom: 10px;
}

.nav-link {
    display: block;
    padding: 6px 8px;
    text-decoration: none;
    color: var(--text);
    border-radius: 6px;
    font-size: 14px;
}

.nav-link:hover {
    background: #f1f5f9;
}

.nav-link.active {
    background: #e0e7ff;
    color: var(--accent);
    font-weight: 600;
    border-left: 3px solid var(--accent);
    padding-left: 5px;
}

/* Collapsible */

.collapsible {
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    color: #64748b;
    padding: 6px 0;
    cursor: pointer;
}

.nav-items {
    display: none;
    margin-left: 8px;
}

.nav-section.open .nav-items {
    display: block;
}