:root {
  --bg: #faf6ef;
  --card: #ffffff;
  --ink: #2b2a26;
  --sub: #6b675e;
  --accent: #1f6f54;
  --accent-dark: #17553f;
  --accent-soft: #e3f0ea;
  --line: #e5ded2;
  --warn: #b0492f;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.7;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px 64px; }

header.top {
  text-align: center;
  padding: 28px 16px 8px;
}
.top-eyebrow { color: var(--accent); font-weight: 700; letter-spacing: .15em; font-size: 13px; }
h1 { font-size: clamp(26px, 6vw, 36px); line-height: 1.3; margin: 6px 0 4px; }
.top-lead { color: var(--sub); font-size: 15px; }
.today-banner {
  display: inline-block;
  margin-top: 12px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: 999px;
  padding: 6px 18px;
  font-weight: 700;
  font-size: 15px;
}

/* タブ */
.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 22px 0 18px;
}
.tab-btn {
  appearance: none;
  border: 2px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 12px 4px 10px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  color: var(--sub);
  cursor: pointer;
  line-height: 1.35;
}
.tab-btn .tab-icon { display: block; font-size: 24px; margin-bottom: 2px; }
.tab-btn[aria-selected="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}
.panel { display: none; }
.panel.active { display: block; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
  margin-bottom: 16px;
}
.card h2 { font-size: 20px; margin-bottom: 4px; }
.card .hint { color: var(--sub); font-size: 14px; margin-bottom: 14px; }

label.fld { display: block; font-weight: 700; font-size: 15px; margin: 12px 0 4px; }
select, input[type="number"], input[type="text"], textarea {
  width: 100%;
  font-family: inherit;
  font-size: 20px;
  padding: 12px;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}
select:focus, input:focus, textarea:focus { outline: 3px solid var(--accent-soft); border-color: var(--accent); }
.row { display: flex; gap: 10px; }
.row > div { flex: 1; }

.btn {
  appearance: none;
  border: none;
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 20px;
  font-weight: 700;
  padding: 15px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-top: 18px;
}
.btn:active { background: var(--accent-dark); }
.btn.secondary {
  background: #fff;
  color: var(--accent-dark);
  border: 2px solid var(--accent);
}

.result {
  margin-top: 18px;
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: none;
}
.result.show { display: block; }
.result .big { font-size: clamp(24px, 6vw, 32px); font-weight: 800; color: var(--accent-dark); line-height: 1.4; }
.result .sub-line { font-size: 16px; margin-top: 6px; }
.result.error { background: #fbe9e3; }
.result.error .big { color: var(--warn); font-size: 18px; }

.quick-table { width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 8px; }
.quick-table th, .quick-table td { border: 1px solid var(--line); padding: 8px 6px; text-align: center; }
.quick-table th { background: var(--bg); }

/* でか文字 */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  appearance: none;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  padding: 8px 14px;
  cursor: pointer;
}
.chip:active { border-color: var(--accent); color: var(--accent-dark); }

#board-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: #111;
  color: #fff;
  display: none;
  cursor: pointer;
}
#board-overlay.show { display: flex; align-items: center; justify-content: center; }
#board-overlay.invert { background: #fff; color: #111; }
#board-text {
  font-weight: 800;
  text-align: center;
  padding: 4vmin;
  width: 100%;
  line-height: 1.25;
  word-break: break-word;
  white-space: pre-wrap;
}
#board-close-hint {
  position: fixed;
  bottom: 12px;
  left: 0; right: 0;
  text-align: center;
  font-size: 14px;
  opacity: .55;
}

/* ラジオ風の大きな選択肢 */
.seg { display: flex; gap: 8px; margin-top: 4px; }
.seg label {
  flex: 1;
  text-align: center;
  border: 2px solid var(--line);
  border-radius: 10px;
  padding: 10px 4px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  background: #fff;
  color: var(--sub);
}
.seg input { position: absolute; opacity: 0; width: 0; height: 0; }
.seg input:checked + span { color: inherit; }
.seg label:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

footer.bottom {
  text-align: center;
  color: var(--sub);
  font-size: 14px;
  padding: 24px 16px 40px;
}
footer.bottom a { color: var(--accent-dark); }

@media (max-width: 420px) {
  body { font-size: 17px; }
  .card { padding: 16px 14px; }
}