/* =========================================================================
   Reset + core layout (sidebar shell, topbar, views)
   ========================================================================= */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
h1, h2, h3, h4, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { max-width: 100%; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---- App grid ---- */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: 100vh;
  height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-fg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 14px 12px;
  gap: 4px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 8px 16px;
}
.brand .logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #7c3aed);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 18px;
  flex-shrink: 0;
}
.brand .name { color: #fff; font-weight: 700; font-size: 16px; line-height: 1.1; }
.brand .tag { font-size: 11px; color: var(--fg-faint); }

.nav-group-label {
  font-size: 10px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--fg-faint); padding: 14px 10px 6px; font-weight: 600;
}
.nav-item {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 11px; border-radius: var(--radius-sm);
  color: var(--sidebar-fg); font-weight: 500; font-size: 13.5px;
  transition: var(--transition); white-space: nowrap;
}
.nav-item .ic { width: 18px; text-align: center; opacity: .9; }
.nav-item:hover { background: var(--sidebar-active); color: #fff; }
.nav-item.active { background: var(--brand); color: #fff; box-shadow: var(--shadow-sm); }
.nav-item .badge {
  margin-left: auto; background: var(--danger); color: #fff;
  font-size: 10px; padding: 1px 7px; border-radius: 10px; font-weight: 700;
}

/* ---- Main column ---- */
.main { display: flex; flex-direction: column; overflow: hidden; height: 100vh; }
.topbar {
  height: var(--header-h); flex-shrink: 0;
  display: flex; align-items: center; gap: 14px;
  padding: 0 22px; background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar .page-title { font-size: 18px; font-weight: 700; }
.topbar .spacer { flex: 1; }
.global-search {
  position: relative; width: 340px; max-width: 38vw;
}
.global-search input {
  width: 100%; height: 38px; padding: 0 12px 0 34px;
  border: 1px solid var(--border); border-radius: 20px;
  background: var(--surface-2); color: var(--fg); font-size: 13px;
  transition: var(--transition);
}
.global-search input:focus { outline: none; border-color: var(--brand); background: var(--surface); }
.global-search .search-ic { position: absolute; left: 12px; top: 10px; opacity: .5; }
.search-results {
  position: absolute; top: 44px; left: 0; right: 0; z-index: 60;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg);
  max-height: 60vh; overflow-y: auto; display: none;
}
.search-results.open { display: block; }
.search-results .sr-group { padding: 6px 0; }
.search-results .sr-head { font-size: 10px; text-transform: uppercase; color: var(--fg-faint); padding: 6px 14px; letter-spacing: .06em; }
.search-results .sr-item { padding: 8px 14px; display: flex; gap: 10px; align-items: center; cursor: pointer; }
.search-results .sr-item:hover { background: var(--brand-soft); }

.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--fg); display: grid; place-items: center;
  font-size: 16px; transition: var(--transition);
}
.icon-btn:hover { background: var(--brand-soft); border-color: var(--brand); }

.view-wrap { flex: 1; overflow-y: auto; padding: 22px; }
.view { display: none; animation: viewIn .25s ease; }
.view.active { display: block; }
@keyframes viewIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.page-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.page-head h2 { font-size: 20px; font-weight: 700; }
.page-head .sub { color: var(--fg-muted); font-size: 13px; }
.page-head .actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }

/* loading splash */
#splash {
  position: fixed; inset: 0; z-index: 999; background: var(--bg);
  display: grid; place-items: center; transition: opacity .4s;
}
#splash .s-inner { text-align: center; }
#splash .s-logo {
  width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 16px;
  background: linear-gradient(135deg, var(--brand), #7c3aed);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 30px;
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { transform: scale(1); opacity: 1; } 50% { transform: scale(.92); opacity: .7; } }
#splash .spinner {
  width: 26px; height: 26px; margin: 14px auto 0;
  border: 3px solid var(--border); border-top-color: var(--brand);
  border-radius: 50%; animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive breakpoints live in css/responsive.css */