:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #fbfbfc;
  --line: #e5e7eb;
  --line-strong: #d7dae0;
  --fg: #171a1f;
  --muted: #687280;
  --soft: #8a94a3;
  --brand: #ff6b4a;
  --brand-dark: #e75c3f;
  --good: #148a4f;
  --warn: #b45b08;
  --bad: #c93636;
  --sidebar: #101216;
  --sidebar-2: #191c22;
}

* { box-sizing: border-box; }

.app-body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

.app-shell {
  display: grid;
  grid-template-columns: 244px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background: var(--sidebar);
  color: #f8fafc;
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 4px 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #fff 0%, #f1f5f9 42%, #ff8a6b 43%, #ff6b4a 100%);
  color: #111318;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-title { font-weight: 720; font-size: 15px; letter-spacing: 0; }
.brand-subtitle { color: #9aa3af; font-size: 12px; margin-top: 2px; }

.nav-group { display: grid; gap: 4px; }
.nav-label { padding: 0 9px 6px; color: #737b88; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.nav-link {
  min-height: 38px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  border-radius: 8px;
  color: #c9ced6;
  text-decoration: none;
  font-size: 14px;
}
.nav-link:hover { background: rgba(255,255,255,.07); color: #fff; }
.nav-link.active { background: var(--sidebar-2); color: #fff; box-shadow: inset 0 0 0 1px rgba(255,255,255,.08); }
.nav-icon { width: 18px; text-align: center; color: #8e98a8; }

.sidebar-foot {
  margin-top: auto;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.04);
  border-radius: 8px;
  padding: 11px;
  color: #abb3bf;
  font-size: 12px;
  line-height: 1.5;
}

.workspace { min-width: 0; }

.topbar {
  position: sticky !important;
  top: 0;
  z-index: 10;
  min-height: 64px;
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px !important;
  background: rgba(247,248,250,.88) !important;
  border-bottom: 1px solid var(--line) !important;
  backdrop-filter: blur(12px);
}

.topbar h1 { margin: 0; font-size: 18px !important; line-height: 1.2; letter-spacing: 0; }
.topbar p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.topbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 22px 24px 48px;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  gap: 16px;
  align-items: start;
}

.panel, section.card, .card, main > section {
  background: var(--surface) !important;
  border: 1px solid var(--line) !important;
  border-radius: 8px !important;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
}

.panel { padding: 16px; }
.panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.panel-title { margin: 0; font-size: 15px; font-weight: 720; }
.panel-note { margin: 4px 0 0; color: var(--muted); font-size: 13px; line-height: 1.5; }

.stat-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.stat { padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-2); }
.stat-value { font-size: 24px; font-weight: 760; line-height: 1; }
.stat-label { margin-top: 8px; color: var(--muted); font-size: 12px; }

.module-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.module-card {
  display: block;
  color: inherit;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fff;
}
.module-card:hover { border-color: var(--line-strong); background: #fbfbfc; }
.module-card h3 { margin: 0 0 7px; font-size: 15px; }
.module-card p { margin: 0; color: var(--muted); line-height: 1.5; font-size: 13px; }

button, .button {
  border: 0;
  border-radius: 8px !important;
  min-height: 36px;
  padding: 9px 12px !important;
  font-size: 13px !important;
  font-weight: 620;
  cursor: pointer;
  background: #eceff3;
  color: var(--fg);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

button.primary, .primary, button.pri, .button.primary {
  background: var(--brand) !important;
  color: #fff !important;
}
button.primary:hover, .primary:hover, button.pri:hover { background: var(--brand-dark) !important; }
.secondary, .button.secondary { background: #eef1f5 !important; color: var(--fg) !important; }
button.ok { background: var(--good) !important; color: #fff !important; }
button.no { background: var(--bad) !important; color: #fff !important; }
button:disabled { opacity: .52; cursor: default; }

input, textarea, select {
  border: 1px solid var(--line) !important;
  border-radius: 8px !important;
  background: #fff !important;
  color: var(--fg) !important;
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: #b8c0cc !important;
  box-shadow: 0 0 0 3px rgba(17,24,39,.06);
}
label { color: var(--muted) !important; font-weight: 640; }

.badge, .pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 8px;
  color: var(--muted);
  background: #fff;
  font-size: 11px;
  line-height: 18px;
}

.history-list, .list-stack { display: grid; gap: 8px; }
.history-item, .list-item {
  border: 1px solid var(--line) !important;
  border-radius: 8px !important;
  background: #fff !important;
  padding: 11px !important;
}
.history-item:hover, .list-item:hover { border-color: var(--line-strong) !important; background: #fbfbfc !important; }
.history-title { font-weight: 700; }
.history-meta, .meta, .hint { color: var(--muted) !important; }

.empty {
  border: 1px dashed var(--line-strong) !important;
  border-radius: 8px !important;
  background: var(--surface-2) !important;
}

.toast { border-radius: 8px !important; box-shadow: 0 12px 40px rgba(15,23,42,.16); }

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-radius: 0;
    padding: 12px;
  }
  .nav-group { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-label, .sidebar-foot { display: none; }
  .page, .topbar { padding-left: 16px !important; padding-right: 16px !important; }
  .page-grid, .dashboard-grid, .module-grid, .stat-grid { grid-template-columns: 1fr; }
}