:root {
  --surface-1: #fcfcfb;
  --page-plane: #f9f9f7;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11,11,11,0.10);
  --series-1: #2a78d6; /* categorical slot 1: blue */
  --series-2: #1baf7a; /* categorical slot 2: aqua */
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --accent: #2a78d6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface-1: #1a1a19;
    --page-plane: #0d0d0d;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --axis: #383835;
    --border: rgba(255,255,255,0.10);
    --series-1: #3987e5;
    --series-2: #199e70;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  background: var(--page-plane);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", "Pretendard", "Apple SD Gothic Neo", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page { max-width: 1080px; margin: 0 auto; padding: 0 20px 60px; }

.hero { padding: 40px 0 24px; text-align: center; }
.hero h1 { font-size: 26px; margin: 0 0 8px; }
.hero p { color: var(--text-secondary); font-size: 14px; margin: 0; }

.layout { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 900px) {
  .layout { grid-template-columns: 380px 1fr; align-items: start; }
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 { font-size: 15px; margin: 0 0 16px; }

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

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; flex: 1; }
.field label { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.field input {
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--page-plane); color: var(--text-primary); font-size: 14px;
}
.field-row { display: flex; gap: 12px; }
.field-hint { font-size: 12px; color: var(--text-muted); margin: -6px 0 14px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); margin-bottom: 14px; }

.results { min-width: 0; }
.result-placeholder {
  padding: 60px 20px; text-align: center; color: var(--text-muted); font-size: 14px;
  border: 1px dashed var(--border); border-radius: 16px;
}

.summary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
@media (max-width: 640px) { .summary-grid { grid-template-columns: 1fr; } }
.stat-tile {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: 14px; padding: 16px;
}
.stat-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.stat-value { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; }

.status-banner {
  display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-radius: 12px;
  font-size: 14px; font-weight: 600; margin-bottom: 16px;
}
.status-banner.good { background: rgba(12,163,12,0.10); color: var(--good); }
.status-banner.warning { background: rgba(250,178,25,0.14); color: #9a6b00; }
.status-banner.critical { background: rgba(208,59,59,0.10); color: var(--critical); }
@media (prefers-color-scheme: dark) {
  .status-banner.warning { color: var(--warning); }
}

.schedule-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.schedule-table th {
  text-align: left; font-size: 11px; color: var(--text-muted); font-weight: 600;
  padding: 6px 8px; border-bottom: 1px solid var(--gridline);
}
.schedule-table td { padding: 8px; border-bottom: 1px solid var(--gridline); font-variant-numeric: tabular-nums; }
.schedule-table tr:last-child td { border-bottom: none; }

.legend { display: flex; gap: 16px; font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; }

.chart-caption { font-size: 12px; color: var(--text-muted); margin: 10px 0 0; }

.dsr-line { font-size: 14px; margin: 6px 0; }
.hint { font-size: 12px; color: var(--text-muted); margin: 10px 0 0; }

.foot-note {
  margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--gridline);
  font-size: 12px; color: var(--text-muted); line-height: 1.6;
}