/* App shell: sidebar + topbar + content. */
.app { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }

/* Sidebar */
.sidebar {
  background: var(--bg-elev); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.sidebar .brand {
  display: flex; align-items: center; gap: var(--sp-3);
  height: var(--topbar-h); padding: 0 var(--sp-4);
  border-bottom: 1px solid var(--border-soft); font-weight: 700; font-size: var(--fs-lg);
}
.sidebar .brand .logo {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: linear-gradient(135deg, var(--accent), #7c5cff);
  display: grid; place-items: center; color: #fff; font-weight: 800;
}
.nav { padding: var(--sp-3); display: flex; flex-direction: column; gap: 2px; overflow-y: auto; flex: 1; }
.nav-section { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); padding: var(--sp-4) var(--sp-3) var(--sp-2); }
.nav a {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: 9px var(--sp-3); border-radius: var(--r-sm);
  color: var(--text-muted); font-weight: 550; font-size: var(--fs-md); transition: var(--transition);
}
.nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); }
.nav a .icon { width: 18px; height: 18px; flex: none; }
.nav a .badge { margin-left: auto; }
.sidebar .foot { padding: var(--sp-3); border-top: 1px solid var(--border-soft); }

/* Main column */
.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: var(--topbar-h); display: flex; align-items: center; gap: var(--sp-4);
  padding: 0 var(--sp-5); border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 80%, transparent); backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.topbar .page-title { font-size: var(--fs-lg); font-weight: 650; }
.topbar .spacer { flex: 1; }
.topbar .controls { display: flex; align-items: center; gap: var(--sp-3); }

.content { padding: var(--sp-5); max-width: 1500px; width: 100%; margin: 0 auto; }
.view-section { margin-bottom: var(--sp-6); }
.view-section > h2 { margin-bottom: var(--sp-4); }

/* Grids */
.grid { display: grid; gap: var(--sp-4); }
.grid-kpi { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cards { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
@media (max-width: 1100px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* Tabs */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin-bottom: var(--sp-5); overflow-x: auto; }
.tabs a, .tabs button {
  padding: 10px var(--sp-4); border: none; background: none; color: var(--text-muted);
  font-weight: 550; border-bottom: 2px solid transparent; white-space: nowrap; transition: var(--transition);
}
.tabs a:hover, .tabs button:hover { color: var(--text); text-decoration: none; }
.tabs a.active, .tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Login */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: var(--sp-5);
  background: radial-gradient(1200px 600px at 50% -10%, rgba(79,124,255,0.12), transparent); }
.login-card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: var(--sp-6); box-shadow: var(--shadow-lg); }
.login-card .brand { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-5); font-weight: 700; font-size: var(--fs-xl); }
.login-card .logo { width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, var(--accent), #7c5cff);
  display: grid; place-items: center; color: #fff; font-weight: 800; }
.login-card form { display: flex; flex-direction: column; gap: var(--sp-4); }
.login-error { color: var(--danger); font-size: var(--fs-sm); min-height: 18px; }

/* Mobile sidebar */
.menu-toggle { display: none; }
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 50; width: var(--sidebar-w); transform: translateX(-100%); transition: transform var(--transition); }
  .app.nav-open .sidebar { transform: translateX(0); }
  .menu-toggle { display: inline-flex; }
  .content { padding: var(--sp-4); }
}
.scrim { display: none; }
.app.nav-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 40; }