:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f4f6f8;
  color: #111827;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: #f4f6f8; color: #111827; }
button, input { font: inherit; }
button { min-height: 46px; border-radius: 10px; border: 1px solid #9ca3af; padding: 0.65rem 0.9rem; background: #fff; color: #111827; font-weight: 700; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:not(:disabled) { cursor: pointer; }
button.primary { background: #111827; color: #fff; border-color: #111827; }
button.text-button { border: 0; background: transparent; color: #374151; padding-inline: 0; min-height: 40px; }
button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid #2563eb; outline-offset: 2px; }

.wrap { width: min(760px, 100%); margin: 0 auto; padding: 16px 14px 40px; }
.topbar { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin: 6px 2px 14px; }
h1 { font-size: clamp(1.6rem, 7vw, 2.3rem); margin: 0; line-height: 1; }
h2 { font-size: 1.1rem; margin: 0; }
.subtitle { margin: 6px 0 0; color: #4b5563; font-size: 0.92rem; }
.card { background: #fff; border: 1px solid #d1d5db; border-radius: 16px; padding: 16px; margin-bottom: 14px; }
.hero { text-align: center; padding-block: 20px; }
.eyebrow, .label { display: block; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.07em; color: #6b7280; font-weight: 800; }
.height-value { font-size: clamp(3.6rem, 18vw, 6.5rem); line-height: 0.95; font-weight: 800; font-variant-numeric: tabular-nums; margin-top: 10px; }
.height-unit { font-size: 1.1rem; color: #4b5563; font-weight: 700; margin-top: 8px; }
.small { font-size: 0.86rem; }
.muted { color: #6b7280; }
.section-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.status-pill { display: inline-flex; align-items: center; justify-content: center; min-height: 32px; padding: 0.25rem 0.7rem; border-radius: 999px; font-size: 0.79rem; font-weight: 800; border: 1px solid transparent; white-space: nowrap; }
.status-pill.neutral { background: #eef2f7; color: #334155; border-color: #cbd5e1; }
.status-pill.good { background: #e7f6ef; color: #0f5132; border-color: #8fd3b6; }
.status-pill.warn { background: #fff4d6; color: #6b4f00; border-color: #e6c45c; }
.status-pill.bad { background: #fdeaea; color: #7f1d1d; border-color: #e5a4a4; }

.accuracy-row { display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: stretch; }
.accuracy-value { font-size: 2.6rem; font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1.05; margin-top: 6px; }
.accuracy-unit { font-size: 1.3rem; }
.target-box { border: 1px solid #cbd5e1; border-radius: 12px; padding: 11px 13px; min-width: 122px; display: grid; align-content: center; gap: 4px; text-align: center; }
.target-title { font-size: 0.75rem; text-transform: uppercase; letter-spacing: .07em; color: #64748b; font-weight: 800; }
.target-box strong { font-size: 1.15rem; }

.stats-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
.stats-grid.compact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stats-grid > div, .difference-box > div { min-width: 0; border-top: 1px solid #e5e7eb; padding-top: 9px; }
.stats-grid strong, .difference-box strong { display: block; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; margin-top: 3px; }

.button-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.button-row button { flex: 1 1 150px; }
.message { margin: 12px 0 0; line-height: 1.45; }

.points-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.point-box { border: 1px solid #d1d5db; border-radius: 12px; padding: 13px; }
.point-title { font-size: 0.8rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: #6b7280; }
.point-height { font-size: 2rem; font-weight: 800; font-variant-numeric: tabular-nums; margin: 6px 0; }
.point-box button { width: 100%; margin-top: 10px; }
.difference-box { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 13px; }
.difference-box strong { font-size: 1.35rem; }

summary { cursor: pointer; font-weight: 800; }
.manual-form { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.manual-form label { display: grid; gap: 5px; font-size: 0.85rem; font-weight: 700; }
.manual-form input { min-height: 46px; padding: 0.7rem; border-radius: 10px; border: 1px solid #9ca3af; background: #fff; color: #111827; font-size: 16px; }
.manual-form button { grid-column: 1 / -1; }
.info p { line-height: 1.48; margin: 10px 0 0; }
footer { color: #6b7280; font-size: 0.75rem; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 4px 2px; }

@media (max-width: 520px) {
  .topbar { align-items: flex-start; }
  .stats-grid.compact { grid-template-columns: 1fr; }
  .accuracy-row { grid-template-columns: 1fr; }
  .target-box { grid-template-columns: auto auto 1fr; align-items: center; text-align: left; }
  .points-grid { grid-template-columns: 1fr; }
  .manual-form { grid-template-columns: 1fr; }
}

@media (prefers-color-scheme: dark) {
  :root, body { background: #0b1120; color: #f3f4f6; }
  .subtitle, .muted, .height-unit { color: #aeb8c7; }
  .card { background: #111827; border-color: #374151; }
  button { background: #1f2937; color: #f9fafb; border-color: #596579; }
  button.primary { background: #f3f4f6; color: #111827; border-color: #f3f4f6; }
  button.text-button { color: #cbd5e1; }
  .eyebrow, .label, .point-title, .target-title { color: #9ca3af; }
  .stats-grid > div, .difference-box > div { border-top-color: #374151; }
  .target-box, .point-box { border-color: #4b5563; }
  .manual-form input { background: #0f172a; color: #f9fafb; border-color: #596579; }
  .status-pill.neutral { background: #1e293b; color: #cbd5e1; border-color: #475569; }
  .status-pill.good { background: #123c2c; color: #b7f0d4; border-color: #2f7257; }
  .status-pill.warn { background: #4f3b05; color: #ffe49a; border-color: #8a6d1a; }
  .status-pill.bad { background: #4c1d1d; color: #fecaca; border-color: #854d4d; }
}