* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: #f6f7fb;
  color: #111827;
}
.app { display: flex; min-height: 100vh; }
.hidden { display: none; }
.login-page {
  position: fixed;
  inset: 0;
  background: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 360px;
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 18px 40px rgba(15,23,42,0.2);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.code-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }
.login-title { font-size: 18px; font-weight: 800; }
.login-sub { font-size: 12px; color: #6b7280; margin-bottom: 6px; }
.login-msg { font-size: 12px; color: #ef4444; min-height: 16px; }
.sidebar {
  width: 260px;
  background: #101828;
  color: #fff;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.logo { font-size: 18px; font-weight: 800; letter-spacing: 0.5px; }
.nav { display: flex; flex-direction: column; gap: 10px; }
.nav-item {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: #cbd5f5;
  padding: 10px 12px;
  border-radius: 10px;
  text-align: left;
  cursor: pointer;
}
.nav-item.active { background: #1d2939; color: #fff; border-color: rgba(255,255,255,0.2); }
.settings { margin-top: auto; display: flex; flex-direction: column; gap: 8px; }
.label { font-size: 12px; color: #98a2b3; }
.input, .textarea, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  background: #fff;
  font-size: 14px;
}
.input[readonly] { background: #f3f4f6; color: #6b7280; }
.textarea { min-height: 110px; resize: vertical; }
.btn {
  background: #1f2937;
  border: none;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
}
.btn.ghost { background: #eef2ff; color: #1f2937; border: 1px solid #e5e7eb; }
.btn.primary { background: #ff6b35; }
.main { flex: 1; padding: 28px; }
.panel { display: none; gap: 16px; }
.panel.active { display: block; }
.panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.panel-subtitle { margin-top: 6px; font-size: 12px; color: #6b7280; }
.row { display: flex; gap: 12px; align-items: center; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.card { background: #fff; border-radius: 16px; padding: 18px; box-shadow: 0 8px 20px rgba(15,23,42,0.06); }
.stat-card { cursor: pointer; transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease; border: 1px solid transparent; }
.stat-card:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(15,23,42,0.08); border-color: rgba(255,107,53,0.28); }
.card-label { color: #6b7280; font-size: 13px; }
.card-value { font-size: 22px; font-weight: 800; margin-top: 6px; }
.chart { position: relative; background: #fff; border-radius: 16px; padding: 16px; box-shadow: 0 8px 20px rgba(15,23,42,0.06); }
.chart-header { display:flex; align-items:center; justify-content:space-between; font-weight: 700; margin-bottom: 12px; }
.chart canvas { max-width: 100%; }
.chart-tabs { display:flex; gap: 6px; }
.tab-btn { padding: 6px 10px; border-radius: 999px; border: 1px solid #e5e7eb; background: #f9fafb; font-size: 12px; cursor: pointer; }
.tab-btn.active { background: #ff6b35; color: #fff; border-color: transparent; }
.chart-tip {
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(17,24,39,0.9);
  color: #fff;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 12px;
  pointer-events: none;
  transform: translate(-50%, -120%);
  display: none;
  z-index: 2;
}
.chart-list { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; }
.chart-item { background: #f1f5f9; border-radius: 10px; padding: 10px; text-align: center; }
.chart-count { font-size: 16px; font-weight: 700; }
.table-wrap { background: #fff; border-radius: 16px; padding: 12px; box-shadow: 0 8px 20px rgba(15,23,42,0.06); }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { padding: 10px 8px; border-bottom: 1px solid #f3f4f6; text-align: left; }
.table tr:hover { background: #f9fafb; }
.pager { display: flex; justify-content: center; align-items: center; gap: 16px; margin-top: 12px; }
.detail-card { margin-top: 16px; background: #fff; border-radius: 16px; padding: 16px; box-shadow: 0 8px 20px rgba(15,23,42,0.06); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 12px; }
.form-grid .textarea { grid-column: span 2; }
.form-grid .btn { grid-column: span 2; }
@media (max-width: 1100px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .panel-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}
@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
}