:root {
  --bg: #f5f7f8;
  --panel: #ffffff;
  --line: #d9e0e7;
  --text: #18212d;
  --muted: #667386;
  --accent: #0f766e;
  --accent-2: #2454a6;
  --bad: #b42318;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Malgun Gothic", sans-serif;
}

.app-header {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 5;
}

h1, h2, p { margin: 0; }
h1 { font-size: 21px; }
h2 { font-size: 16px; }
h3 { font-size: 14px; margin: 4px 0 0; }
main { padding: 18px; display: grid; gap: 14px; }

button, select, input, textarea {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  padding: 8px 10px;
}
textarea { width: 100%; resize: vertical; min-height: 86px; }
button {
  cursor: pointer;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
}
button.ghost, button.tab {
  background: #fff;
  color: var(--text);
  border-color: var(--line);
}
button.danger {
  color: var(--bad);
}

.header-actions { display: flex; align-items: center; gap: 10px; }
.select-label { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.muted { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }

.auth-panel, .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}
.auth-panel {
  max-width: 520px;
  display: grid;
  gap: 12px;
}
.login-form { display: flex; gap: 8px; }
.login-form input { flex: 1; min-width: 0; }

.tabbar {
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}
.tab {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  margin-bottom: -1px;
}
.tab.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.page { display: none; }
.page.is-active { display: block; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}
.metric {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}
.metric span { display: block; color: var(--muted); font-size: 12px; }
.metric b { display: block; margin-top: 6px; font-size: 20px; }

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.builder-grid, .compare-grid {
  display: grid;
  grid-template-columns: minmax(460px, 1.35fr) minmax(320px, .85fr);
  gap: 14px;
  align-items: start;
}
.compare-grid { grid-template-columns: minmax(320px, .7fr) minmax(520px, 1.3fr); }
.side-stack { display: grid; gap: 14px; }
.builder-panel, .compare-panel { display: grid; gap: 12px; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 10px;
}
label, .wide-label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
}
.rule-list { display: grid; gap: 6px; }
.rule-row {
  display: grid;
  grid-template-columns: minmax(120px, 1.2fr) 90px minmax(100px, .8fr) minmax(120px, .9fr) 34px;
  gap: 6px;
}
.ranking-row {
  grid-template-columns: minmax(120px, 1.2fr) 90px minmax(90px, .7fr) minmax(100px, .8fr) 34px;
}
.builder-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.json-box { min-height: 160px; display: none; font-family: Consolas, monospace; font-size: 12px; }
.json-box.is-visible { display: block; }

.table-wrap { overflow: auto; }
.compact-table { max-height: 420px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border-bottom: 1px solid var(--line); padding: 9px 8px; text-align: left; white-space: nowrap; }
th { background: #f9fafb; color: var(--muted); font-weight: 700; }
.positive { color: var(--accent); font-weight: 700; }
.negative { color: var(--bad); font-weight: 700; }

.list { display: grid; gap: 8px; }
.item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fff;
  display: grid;
  gap: 6px;
}
.item button { justify-self: start; padding: 6px 9px; }
.run-row {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
}
.run-row button { justify-self: end; }
.run-check {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  align-items: start;
  color: var(--text);
  cursor: pointer;
}
.run-check input { margin-top: 3px; padding: 0; }
.run-check span { display: grid; gap: 5px; }
.pill {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 7px;
  color: var(--muted);
  font-size: 12px;
  margin-right: 4px;
}
.chart {
  width: 100%;
  height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.small-chart { height: 260px; }
.result-panel { display: grid; gap: 12px; }
.compact-list .item { padding: 9px; }
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  color: var(--muted);
  font-size: 13px;
}
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i, .color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.color-dot { margin-right: 6px; }
.help-panel {
  max-width: 920px;
  display: grid;
  gap: 12px;
  line-height: 1.65;
}
.help-panel h3 { margin-top: 10px; }

@media (max-width: 1000px) {
  .app-header, .panel-heading, .login-form { align-items: stretch; flex-direction: column; }
  .header-actions { width: 100%; justify-content: space-between; }
  .summary-grid, .builder-grid, .compare-grid, .form-grid { grid-template-columns: 1fr; }
  main { padding: 12px; }
  .tabbar { overflow-x: auto; }
}