.app{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;padding:18px 14px;background:rgba(255,255,255,.96);border-right:1px solid var(--line);display:flex;flex-direction:column;overflow-y:auto;z-index:20}
.brand{display:flex;gap:12px;align-items:center;padding:3px 7px 18px}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,#7563dd,#a88bf0);box-shadow:0 8px 18px rgba(120,103,230,.25);display:grid;place-items:center;color:#fff;font-weight:900;font-size:18px}
.brand strong{display:block;font-size:15px}
.brand small{color:var(--muted);font-size:11px}
.nav-title{font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--soft);font-weight:800;padding:9px 10px;margin-top:12px}
.nav{display:grid;gap:5px}
.nav button{width:100%;height:44px;border:1px solid transparent;background:transparent;border-radius:13px;display:flex;gap:11px;align-items:center;text-align:left;padding:0 12px;color:#657087;font-weight:650;transition:var(--t-fast)}
.nav button:hover{background:var(--primary-pale);color:var(--primary)}
.nav button.active{background:var(--primary-soft);border-color:#d8d1ff;color:var(--primary)}
.nav .badge-pill{margin-left:auto;min-width:22px;height:22px;padding:0 7px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:11px;font-weight:800;display:inline-flex;align-items:center;justify-content:center}
.nav button.active .badge-pill{background:#fff}
.side-foot{margin-top:auto;border-top:1px solid var(--line);padding:14px 7px 2px;display:flex;align-items:center;gap:10px}
.avatar{width:36px;height:36px;border-radius:50%;background:#e9e5ff;color:var(--primary);display:grid;place-items:center;font-weight:800;font-size:12px;flex:none}
.side-foot__meta{min-width:0;flex:1}
.side-foot strong{font-size:12px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-foot span{font-size:11px;color:var(--muted);display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.side-foot__settings{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;color:var(--soft);transition:var(--t-fast);flex:none;background:transparent;border:0}
.side-foot__settings:hover{background:var(--primary-pale);color:var(--primary)}
.main{min-width:0;padding:24px 28px 60px}
.topbar{position:sticky;top:0;z-index:15;min-height:var(--topbar-h);background:rgba(246,247,251,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding:14px 28px;margin:-24px -28px 18px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.topbar-title h1{font-size:var(--fs-h1);letter-spacing:-.035em}
.topbar-title p{color:var(--muted);font-size:13px;margin-top:2px}
.topbar-actions{display:flex;align-items:center;gap:10px}
.session-chip{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:12px;background:#fff;border:1px solid var(--line-strong);font-weight:700;font-size:13px;cursor:pointer;transition:var(--t-fast)}
.session-chip:hover{border-color:#bfb5f7;color:var(--primary)}
.session-chip.running{background:var(--success-soft);border-color:#bce7d4;color:#258765}
.session-chip.paused{background:var(--warning-soft);border-color:#f2d6a7;color:#b57622}
.session-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--soft)}
.session-chip.running .dot{background:var(--success);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
@media(max-width:900px){
  .app{grid-template-columns:1fr}
  .sidebar{position:relative;height:auto;border-right:0;border-bottom:1px solid var(--line)}
  .main{padding:16px}
  .topbar{margin:-16px -16px 14px;padding:12px 16px}
}