:root {
  /* CT Viewer系 warm-white palette */
  --background: hsl(40 35% 97%);
  --foreground: hsl(30 14% 12%);
  --card: hsl(40 25% 99%);
  --muted: hsl(38 20% 93%);
  --muted-fg: hsl(30 8% 40%);
  --primary: hsl(196 60% 34%);
  --primary-fg: hsl(40 25% 99%);
  --border: hsl(38 14% 85%);
  --shadow: 28 20% 60%;
  --danger: hsl(4 65% 45%);
  --warn-bg: hsl(38 95% 93%);
  --warn-border: hsl(32 85% 62%);
  --warn-fg: hsl(24 65% 25%);
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 28px 16px 56px;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo UI", system-ui, sans-serif;
  font-feature-settings: "tnum";
  background: var(--background);
  color: var(--foreground); line-height: 1.65;
}
.wrap { max-width: 980px; margin: 0 auto; }
h1 { font-size: 1.6rem; margin: 0 0 8px; letter-spacing: -0.015em; }
.sub { color: var(--muted-fg); font-size: .95rem; margin-bottom: 24px; }

.card {
  border-radius: 16px; background: var(--card); border: none;
  box-shadow:
    0 1px 2px 0 hsl(var(--shadow) / 0.06),
    0 8px 24px -8px hsl(var(--shadow) / 0.14);
}

.conditions { padding: 20px; margin-bottom: 24px; }
.group-label {
  font-size: 14px; font-weight: 600; letter-spacing: 0.08em;
  color: var(--muted-fg); margin-bottom: 10px;
}
.group-label.proposal { color: var(--primary); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 18px; }
.grid.proposal {
  grid-template-columns: minmax(140px, 220px) 1fr; align-items: end;
  padding: 12px; border-radius: 12px; margin-bottom: 0;
  background: hsl(196 40% 95%);
}
label { font-size: .95rem; color: var(--muted-fg); display: block; margin-bottom: 5px; }
input[type="number"], select {
  width: 100%; padding: 10px 13px; font-size: 1.1rem;
  border: 1px solid var(--border); border-radius: 10px;
  background: #fff; color: var(--foreground);
  font-variant-numeric: tabular-nums;
}
input:focus-visible, select:focus-visible {
  outline: 2px solid hsl(196 55% 45% / 0.6); outline-offset: 2px;
}
#hdiff-note { font-size: .95rem; color: var(--muted-fg); padding-bottom: 10px; }
.error { color: var(--danger); font-size: 1rem; margin: 8px 0 0; white-space: pre-wrap; }
.error:empty { margin: 0; }

/* 警告(学習範囲外の外挿・モデル破綻) */
.warning {
  display: none;
  border-radius: 16px; padding: 16px 20px; margin-bottom: 24px;
  background: var(--warn-bg); border: 1.5px solid var(--warn-border);
  color: var(--warn-fg); font-size: 1.05rem; line-height: 1.7;
}
.warning.show { display: block; }
.warning .warning-title { font-weight: 700; font-size: 1.1rem; margin-bottom: 4px; }
.warning .fit { font-weight: 600; }

/* STEPセクション */
.section {
  margin-bottom: 32px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 18px 20px 24px;
  background: hsl(38 25% 96% / 0.55);
}
.step-badge {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .1em;
  color: var(--primary-fg); background: var(--primary);
  padding: 2px 10px; border-radius: 999px; margin-bottom: 8px;
}
.section h2 { font-size: 1.35rem; margin: 0 0 4px; letter-spacing: -0.015em; }
.section .desc { font-size: .95rem; color: var(--muted-fg); margin: 0 0 14px; }

/* 目標CT値の設定(自動/手動) */
.target-box { padding: 16px 18px; margin-bottom: 16px; }
.mode-row { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 12px; }
.radio {
  display: inline-flex; align-items: center; gap: 6px; margin: 0;
  font-size: 1rem; color: var(--foreground); cursor: pointer;
}
.radio input { width: auto; margin: 0; accent-color: hsl(196 60% 34%); }
.target-row { display: flex; align-items: end; gap: 16px; flex-wrap: wrap; }
.target-row > .field { flex: 0 1 220px; }
.basis {
  flex: 1 1 320px; font-size: .92rem; color: var(--muted-fg);
  padding-bottom: 8px; line-height: 1.6;
}
.basis b { color: var(--foreground); font-weight: 600; }

/* VS型: 左パネル | 中央の差分 | 右パネル */
.compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: stretch; }
@media (max-width: 720px) { .compare { grid-template-columns: 1fr; } }

.panel { overflow: hidden; transition: opacity 150ms ease; display: flex; flex-direction: column; }
.panel.loading { opacity: .45; }
.panel-head { padding: 14px 20px; border-bottom: 1px solid var(--border); }
.panel-head .name { font-size: 1.15rem; font-weight: 700; }
.panel.new .panel-head .name { color: var(--primary); }
.panel-head .vars { font-size: .9rem; color: var(--muted-fg); }
.panel-head .vars em { font-style: normal; font-weight: 600; color: var(--primary); }
.panel table { width: 100%; border-collapse: collapse; }
.panel td { padding: 12px 20px; font-size: 1.1rem; font-variant-numeric: tabular-nums; }
.panel tr + tr td { border-top: 1px solid var(--border); }
.panel td:first-child { color: var(--muted-fg); width: 45%; white-space: nowrap; }
.panel td.big { font-size: 2rem; font-weight: 700; }
.panel.new td.big { color: var(--primary); }
.panel td.void { color: var(--muted-fg); font-size: 1.4rem; font-weight: 700; }
.placeholder { color: var(--muted-fg); padding: 22px 20px; font-size: 1rem; }

/* STEP2 パネル内の投与量入力 */
.dose-field { padding: 14px 20px; border-bottom: 1px solid var(--border); background: hsl(38 25% 97%); }
.dose-field label { margin-bottom: 5px; }
.dose-origin { font-size: .85rem; color: var(--muted-fg); margin-top: 6px; }
.dose-origin button {
  font: inherit; font-size: .85rem; color: var(--primary); background: none;
  border: none; padding: 0; text-decoration: underline; cursor: pointer;
}

/* パネル内の信頼性警告 */
.panel-warn {
  margin: 0; padding: 12px 20px; font-size: .92rem; line-height: 1.6;
  background: var(--warn-bg); color: var(--warn-fg);
  border-top: 1px solid var(--warn-border);
}
.panel-warn.hard { background: hsl(4 70% 95%); color: hsl(4 60% 28%); border-top-color: hsl(4 60% 70%); }
.panel-warn .t { font-weight: 700; }

.vs {
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  min-width: 130px; padding: 12px 14px; text-align: center;
  font-variant-numeric: tabular-nums;
}
.vs .vs-label { font-size: .82rem; color: var(--muted-fg); line-height: 1.4; }
.vs .vs-value { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.015em; }
.vs .vs-unit { font-size: .95rem; font-weight: 600; color: var(--muted-fg); }
@media (max-width: 720px) { .vs { min-width: 0; padding: 8px; } }