:root {
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --border: #e0e4e9;
  --text: #1c2430;
  --muted: #6b7684;
  --accent: #2f6feb;
  --accent-dark: #1d4ed8;
  --danger: #d1373f;
  --shadow: 0 1px 3px rgba(20, 24, 32, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

#shell {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.shell-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-right: auto;
  white-space: nowrap;
}

.shell-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.shell-nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.88rem;
  white-space: nowrap;
}

.shell-nav a.active {
  background: var(--accent);
  color: #fff;
}

.shell-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.shell-filters select,
.shell-filters input {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
}

main#content {
  padding: 16px;
  max-width: 1200px;
  margin: 0 auto;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
}

.card .card-label {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.card .card-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.card .card-sub {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 4px;
}

.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.chart-wrap {
  position: relative;
  height: 280px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 700px) {
  .grid-2 { grid-template-columns: 1fr; }
  #shell { flex-direction: column; align-items: stretch; }
  .shell-title { margin-right: 0; }
}

.table-wrap {
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
}

th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-weight: 600;
  background: #fafbfc;
}

tbody tr:hover {
  background: #f8fafc;
}

.toggle-group {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.toggle-group button {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  color: var(--text);
}

.toggle-group button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* login page */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.login-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  width: 100%;
  max-width: 340px;
  box-shadow: var(--shadow);
}

.login-box h1 {
  font-size: 1.2rem;
  margin: 0 0 16px;
}

.login-box input {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  font-family: inherit;
}

.login-box button {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

.login-box button:hover {
  background: var(--accent-dark);
}

.login-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 10px;
  min-height: 1.2em;
}

.loading, .empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 8px 0;
}

.total-row td { font-weight: 700; border-top: 2px solid #d0d7de; }

.expandable { cursor: pointer; }
.expandable:hover td { background: #f0f4ff; }
.sub-row td { background: #fafbfc; color: #444; }
.sub-label { padding-left: 24px; }