/* ── Layout ─────────────────────────────────────────────── */

/* NAVBAR */
.navbar {
  position:fixed; top:0; left:0; right:0; height:var(--navbar); z-index:100;
  background:rgba(255,255,255,.85); backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border); display:flex; align-items:center;
  padding:0 20px 0 calc(var(--sidebar) + 20px); transition:all .3s;
}
.navbar.scrolled { background:rgba(255,255,255,.97); box-shadow:var(--shadow); }
.navbar-brand { font-family:var(--display); font-size:18px; font-weight:700;
                color:var(--text); display:flex; align-items:center; gap:8px; }
.navbar-brand span { color:var(--primary); }
.navbar-right { margin-left:auto; display:flex; align-items:center; gap:10px; }
.period-badge { background:rgba(15,90,230,.09); border:1px solid rgba(15,90,230,.18);
                border-radius:20px; padding:4px 14px; font-size:12px;
                color:var(--primary); font-family:var(--mono); font-weight:600; }
.navbar-btn { background:var(--card); border:1px solid var(--border2); border-radius:8px;
              padding:6px 14px; color:var(--text2); font-size:12px; cursor:pointer;
              transition:all .2s; display:flex; align-items:center; gap:6px; font-weight:500; }
.navbar-btn:hover { background:var(--primary-dim); color:var(--primary); border-color:var(--primary); }
.burger { display:none; background:none; border:none; cursor:pointer;
          color:var(--text); padding:6px; font-size:18px; }

/* SIDEBAR */
.sidebar { position:fixed; left:0; top:0; bottom:0; width:var(--sidebar); z-index:99;
           background:var(--card); border-right:1px solid var(--border);
           display:flex; flex-direction:column; padding-top:var(--navbar);
           transition:transform .3s; box-shadow:2px 0 8px rgba(0,0,0,.04);
           overflow-y:auto; }
.nav-section { padding:8px 12px 4px; font-size:10px; font-weight:700;
               color:var(--text3); text-transform:uppercase; letter-spacing:1.5px; margin-top:8px; }
.nav-item { display:flex; align-items:center; gap:10px; padding:9px 16px;
            margin:1px 8px; border-radius:var(--radius2); cursor:pointer;
            color:var(--text2); font-size:13px; font-weight:500; transition:all .2s; }
.nav-item:hover { background:var(--primary-dim); color:var(--primary); }
.nav-item.active { background:var(--primary-dim); color:var(--primary);
                   border-left:3px solid var(--primary); font-weight:600; }
.nav-icon { font-size:16px; width:20px; text-align:center; }
.nav-badge { margin-left:auto; background:var(--primary); color:#fff;
             font-size:9px; padding:1px 6px; border-radius:10px; font-weight:700; }

/* MAIN */
.main { margin-left:var(--sidebar); margin-top:var(--navbar);
        min-height:calc(100vh - var(--navbar)); padding:24px; }
.section { display:none; animation:fadeIn .3s ease; }
.section.active { display:block; }

@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
@keyframes spin   { to{transform:rotate(360deg)} }

/* PAGE HEADER */
.page-header { margin-bottom:24px; display:flex; align-items:flex-start;
               justify-content:space-between; flex-wrap:wrap; gap:12px; }
.page-title { font-family:var(--display); font-size:26px; font-weight:800;
              color:var(--text); letter-spacing:-.5px; }
.page-subtitle { color:var(--text3); font-size:13px; margin-top:2px; }
.page-actions { display:flex; gap:8px; flex-wrap:wrap; }

/* GRIDS */
.grid2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.grid3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; }

/* TREE */
.tree-group-body.collapsed { display:none; }

/* RESPONSIVE */
@media(max-width:1100px) { .grid3 { grid-template-columns:1fr 1fr; } }
@media(max-width:768px) {
  .sidebar { transform:translateX(-100%); }
  .sidebar.open { transform:translateX(0); }
  .main { margin-left:0; }
  .navbar { padding-left:60px; }
  .burger { display:block; }
  .stats-grid { grid-template-columns:1fr 1fr; }
  .grid2, .grid3 { grid-template-columns:1fr; }
}
@media(max-width:480px) { .stats-grid { grid-template-columns:1fr; } }