:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-muted: #eef3fb;
  --primary: #2554d9;
  --primary-dark: #173ba1;
  --accent: #00a3a3;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #d8e0ef;
  --warning: #c98300;
  --danger: #c53333;
  --success: #147d42;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(31, 41, 55, 0.08);
  --font: Inter, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, #edf3ff 0%, var(--bg) 40%);
  color: var(--text);
}

.shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.25rem;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.brand {
  display: flex;
  flex-direction: column;
}

.brand h1 {
  margin: 0;
  font-size: 1.45rem;
}

.brand small {
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--primary-dark);
  background: #e6edff;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}

.nav-links button {
  white-space: nowrap;
}

.search-inline {
  margin-left: auto;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.search-inline input {
  width: 280px;
  max-width: 42vw;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 0.95rem;
}

.grid {
  display: grid;
  gap: 1rem;
}

.kpi-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.card h2,
.card h3 {
  margin-top: 0;
}

.stat {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1rem;
}

.sidebar {
  position: sticky;
  top: 1rem;
  align-self: start;
}

.menu button {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 0.7rem;
  margin-bottom: 0.45rem;
  cursor: pointer;
}

.menu button.active {
  background: #e8efff;
  border-color: #b8cbff;
  font-weight: 700;
}

.panel { display: none; }
.panel.active { display: block; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.6rem;
}

input, select, textarea, button {
  font-family: inherit;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.6rem;
}

button.primary {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 0.55rem 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

button.ghost {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.7rem;
  font-size: 0.92rem;
}

.table th,
.table td {
  text-align: left;
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.35rem;
}

.badge {
  display: inline-block;
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #e3edff;
  color: #22429b;
}

.attention-list li { margin-bottom: 0.45rem; }
.attention-list .urgent { color: var(--danger); }
.attention-list .warn { color: var(--warning); }
.report-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.65rem;
  margin-bottom: 0.8rem;
}

.report-category-card {
  display: flex;
  flex-direction: column;
  text-align: left;
  gap: 0.2rem;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 0.75rem;
  cursor: pointer;
}

.report-category-card.active {
  background: #e8efff;
  border-color: #b8cbff;
}

.report-category-title {
  font-size: 0.98rem;
  font-weight: 700;
}

.report-category-panel {
  display: none;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.report-category-panel.active {
  display: block;
}

.visit-heatmap {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.7rem;
}

.heatmap-row {
  display: grid;
  grid-template-columns: 80px repeat(7, minmax(36px, 1fr));
  gap: 0.35rem;
  align-items: center;
}

.heatmap-corner,
.heatmap-hour-label,
.heatmap-day-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.heatmap-hour-label {
  text-align: center;
}

.heatmap-block {
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: #17325d;
  background: #edf3ff;
}

.heat-0 { background: #f3f6fd; color: #93a0b7; }
.heat-1 { background: #dae7ff; }
.heat-2 { background: #b9d0ff; }
.heat-3 { background: #88adff; color: #0e2a62; }
.heat-4 { background: #4f7be3; color: #ffffff; }

.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.discovery-scroll {
  display: flex;
  gap: 0.9rem;
  overflow-x: auto;
  padding-bottom: 0.45rem;
}

.book-card {
  min-width: 190px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.8rem;
}

.book-card h4 { margin: 0.15rem 0; }
.muted { color: var(--text-muted); }

.discovery-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.9rem;
}

.modal {
  border: none;
  border-radius: 16px;
  width: min(680px, 92vw);
  padding: 0;
}

.modal::backdrop {
  background: rgba(16, 26, 56, 0.55);
}

.modal-content { padding: 1rem; }

@media (max-width: 920px) {
  .layout, .hero { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}