/* ============================================
   LAYOUT: sidebar + main
   ============================================ */

.app {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    overflow: hidden;
}

/* ===== SIDEBAR ===== */
.sidebar {
    background: var(--bg-4);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px 18px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-shrink: 0;
}

.sidebar-logo {
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}
.sidebar-logo .logo-dot { color: var(--accent); font-size: 18px; }

.sidebar-user {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    cursor: pointer;
    transition: background 0.2s;
}
.sidebar-user:hover { background: rgba(255,255,255,0.03); }

.sidebar-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(251, 209, 87, 0.12);
    border: 1px solid rgba(251, 209, 87, 0.3);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-email {
    font-size: 12px;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sidebar-user-role {
    font-size: 10px;
    color: var(--text-dim);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    padding: 0 4px;
    gap: 2px;
}
.sidebar-tab {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-family: inherit;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 10px 4px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}
.sidebar-tab i { font-size: 16px; }
.sidebar-tab:hover { color: var(--text); }
.sidebar-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px 8px;
    min-height: 0;
}
.sidebar-content::-webkit-scrollbar { width: 6px; }
.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--bg-3);
    border-radius: 3px;
}
.sidebar-content::-webkit-scrollbar-thumb:hover { background: var(--border); }

.sidebar-panel { display: none; }
.sidebar-panel.active { display: block; }

.sidebar-action {
    width: 100%;
    background: transparent;
    border: 1px dashed var(--border);
    color: var(--text-dim);
    padding: 8px 12px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-bottom: 12px;
    transition: all 0.2s;
}
.sidebar-action:hover {
    border-color: var(--accent);
    color: var(--accent);
    border-style: solid;
}
.sidebar-action i { font-size: 15px; }

.sidebar-hint {
    color: var(--text-dim);
    font-size: 11px;
    line-height: 1.5;
    padding: 6px 10px;
    text-align: center;
}

/* ===== ДЕРЕВО ===== */
.tree { display: flex; flex-direction: column; gap: 2px; }

.tree-node {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text);
    user-select: none;
    transition: background 0.15s, color 0.15s;
    border-left: 2px solid transparent;
}
.tree-node:hover {
    background: rgba(255,255,255,0.04);
    color: var(--accent);
}
.tree-node.active {
    background: rgba(251, 209, 87, 0.08);
    border-left-color: var(--accent);
    color: var(--accent);
}

.tree-node .node-icon {
    font-size: 15px;
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}
.tree-node .node-label {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tree-node .node-chevron {
    font-size: 14px;
    color: var(--text-dim);
    transition: transform 0.2s;
    flex-shrink: 0;
}
.tree-node.expanded .node-chevron { transform: rotate(90deg); }

.tree-node .node-action {
    font-size: 14px;
    color: var(--text-dim);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    background: transparent;
    border: none;
    padding: 2px;
    cursor: pointer;
    border-radius: 3px;
    flex-shrink: 0;
}
.tree-node:hover .node-action { opacity: 1; pointer-events: auto; }
.tree-node .node-action:hover { color: var(--accent); }
.tree-node .node-action.danger:hover { color: var(--alert); }

.tree-children { display: flex; flex-direction: column; gap: 2px; }
.tree-children.collapsed { display: none; }
.tree-children .tree-node { padding-left: 26px; }
.tree-children .tree-children .tree-node { padding-left: 42px; }

.tree-node.node-task .node-icon { color: var(--info); }
.tree-node.node-file { color: var(--text-dim); cursor: default; }
.tree-node.node-file .node-icon { color: var(--text-dim); }

/* ===== MAIN ===== */
.main {
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
    background: var(--bg);
}

.main-header {
    padding: 14px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-2);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    min-height: 60px;
}

.main-burger {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 22px;
    cursor: pointer;
    padding: 4px 8px 4px 0;
    margin-right: 4px;
}
.main-burger:hover { color: var(--accent); }

.main-header .breadcrumbs {
    color: var(--text-dim);
    font-size: 12px;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.main-header .breadcrumbs a {
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.2s;
}
.main-header .breadcrumbs a:hover { color: var(--accent); }
.main-header .breadcrumbs .sep { opacity: 0.4; }
.main-header .breadcrumbs .current { color: var(--accent); font-weight: 700; }
.main-header .breadcrumbs i { font-size: 14px; }

.main-header-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-body {
    flex: 1;
    overflow: auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.main-page { padding: 32px 40px; max-width: 900px; }

/* ===== BACKDROP НА МОБИЛЬНЫХ ===== */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 90;
    backdrop-filter: blur(2px);
}
.sidebar-backdrop.active { display: block; }

/* ===== АДАПТИВ ===== */
@media (max-width: 900px) {
    .app { grid-template-columns: 1fr; }

    .sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        width: 280px;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }
    .sidebar.open { transform: translateX(0); }

    .main-burger { display: inline-flex; }

    .main-header { padding: 12px 16px; }
    .main-page { padding: 20px; }
}