/* ── Shell ── */
.shell { display: flex; min-height: 100vh; }

/* ── Sidebar ── */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sw);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  z-index: 100;
  transition: transform var(--t);
}
.sb-brand {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0 1rem; height: var(--th);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sb-logo { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.3em; color: var(--accent); font-weight: 700; }
.sb-sub  { font-size: 0.65rem; color: var(--muted); }

.sb-nav { flex: 1; overflow-y: auto; padding: 0.5rem 0; }
.sb-section { padding: 0.6rem 1rem 0.2rem; font-family: var(--mono); font-size: 0.55rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); opacity: 0.5; }

.nav-item {
  display: flex; align-items: center; gap: 0.6rem;
  padding: 0.5rem 1rem;
  width: 100%; text-align: left;
  background: none; border: none; color: var(--muted);
  font-size: 0.8rem; cursor: pointer;
  transition: color var(--t), background var(--t);
  position: relative;
}
.nav-item svg { width: 14px; height: 14px; flex-shrink: 0; }
.nav-item:hover { color: var(--white); background: rgba(255,255,255,0.03); }
.nav-item.active { color: var(--accent); background: var(--accent2); }
.nav-item.active::before { content:''; position:absolute; left:0; top:0; bottom:0; width:2px; background:var(--accent); }

.sb-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.sb-user { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.5rem; }
.sb-avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--accent2); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 0.6rem; color: var(--accent); font-weight: 700; flex-shrink: 0; }
.sb-email { font-size: 0.72rem; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Topbar ── */
.topbar {
  position: fixed; top: 0; left: var(--sw); right: 0;
  height: var(--th);
  background: rgba(9,14,26,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 90;
  transition: left var(--t);
}
.topbar-title { font-size: 0.85rem; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 0.5rem; }

/* ── Main ── */
.main {
  margin-left: var(--sw);
  margin-top: var(--th);
  padding: 1.25rem;
  min-height: calc(100vh - var(--th));
  width: calc(100% - var(--sw));
}

/* ── Page ── */
.page { display: none; }
.page.active { display: block; animation: fadeUp 0.18s ease both; }

.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.25rem; gap: 0.75rem; flex-wrap: wrap;
}
.page-header h1 { font-size: 1.1rem; font-weight: 600; }
.page-header p  { font-size: 0.75rem; color: var(--muted); margin-top: 2px; }

/* ── Grid ── */
.g2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.g3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 0.75rem; }

/* ── Mobile ── */
@media (max-width: 720px) {
  :root { --sw: 0px; }
  .sidebar { transform: translateX(-220px); width: 220px; }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,0.4); }
  .topbar { left: 0; }
  .main { margin-left: 0; width: 100%; padding: 1rem; }
  .g2, .g3 { grid-template-columns: 1fr; }
  #menu-btn { display: flex !important; }
}