:root {
  color-scheme: light dark;
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #17212b;
  --ink-sub: #51606f;
  --line: #ccd5df;
  --accent: #0b6bcb;
  --result: #0a7d4b;
  --warn: #8a5a00;
  --danger: #b42318;
  --focus: #0b6bcb;
  --num: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

button,
input,
select { font: inherit; }

button,
select,
input { min-height: 48px; }

button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .45; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

[hidden] { display: none !important; }

.app-shell {
  width: min(100% - 24px, 760px);
  margin-inline: auto;
  padding: 20px 0 128px;
}

.app-header { margin-bottom: 20px; }
.app-header h1 { margin: 2px 0 6px; font-size: clamp(28px, 8vw, 42px); line-height: 1.18; letter-spacing: -.03em; }
.eyebrow { margin: 0; color: var(--result); font-weight: 800; font-size: 13px; letter-spacing: .08em; }
.tagline { margin: 0; color: var(--ink-sub); }

.pwa-banner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  padding: 12px;
  border: 1px solid var(--accent);
  border-radius: 12px;
  background: var(--surface);
}
.pwa-banner p, .ios-guide { margin: 2px 0 0; color: var(--ink-sub); font-size: 14px; }
.ios-guide { margin: -8px 0 16px; padding: 10px 12px; border-left: 3px solid var(--accent); }

.preset,
.field { display: grid; gap: 7px; }
.preset { margin-bottom: 16px; }
.field-label, legend { font-weight: 750; }
select,
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  font-size: 18px;
}
select { padding: 0 12px; }
input { padding: 8px 52px 8px 12px; font-family: var(--num); font-variant-numeric: tabular-nums; }
.field-control { position: relative; display: block; }
.suffix { position: absolute; top: 50%; right: 14px; translate: 0 -50%; color: var(--ink-sub); }

.mode-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-bottom: 12px;
}
.mode-tab,
.chip {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
}
.mode-tab[aria-selected="true"],
.chip[aria-pressed="true"] { border-color: var(--accent); background: var(--accent); color: var(--surface); }

.input-card,
.result-card {
  margin-bottom: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.section-heading { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; margin-bottom: 12px; }
.section-heading h2 { margin: 0; font-size: 20px; }
.section-heading span { color: var(--ink-sub); font-size: 13px; }
.mode-fields { display: grid; gap: 14px; margin-top: 14px; }
.choice-group { min-width: 0; margin: 14px 0 0; padding: 0; border: 0; }
.choice-group legend { margin-bottom: 7px; }
.chip-row { display: flex; gap: 6px; overflow-x: auto; padding: 2px; }
.chip { flex: 1 0 auto; min-width: 92px; padding: 8px 12px; }
.error-message { min-height: 1.5em; margin: 12px 0 0; color: var(--danger); font-weight: 700; }

.result-card { border-top: 5px solid var(--result); }
.result-card h2 { margin: 0; font-size: 18px; }
.pitch-value { margin: 4px 0; color: var(--result); font-family: var(--num); font-size: clamp(32px, 10vw, 48px); font-weight: 850; line-height: 1.2; }
.result-meta { color: var(--ink-sub); font-family: var(--num); font-size: 18px; font-weight: 700; }
.result-empty, .stale-message { color: var(--ink-sub); }
.stale-message { padding: 8px; border-left: 3px solid var(--warn); }
.result-card.is-stale .pitch-value,
.result-card.is-stale .result-meta,
.result-card.is-stale .position-list { opacity: .42; }
.position-heading { margin: 22px 0 8px; font-size: 17px; }
.position-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.position-list li {
  display: grid;
  grid-template-columns: 36px 1fr auto;
  gap: 8px;
  align-items: baseline;
  min-height: 52px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
.position-index { color: var(--ink-sub); font-family: var(--num); }
.position-label { color: var(--ink-sub); }
.position-list strong { color: var(--result); font-family: var(--num); font-size: clamp(24px, 7vw, 34px); font-variant-numeric: tabular-nums; }
.rounding-note { margin: 16px 0 0; color: var(--ink-sub); font-size: 13px; }
.sumidashi-open { width: 100%; margin-top: 18px; }

.button,
.more-menu button,
.icon-button {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 800;
}
.button.primary { border-color: var(--accent); background: var(--accent); color: var(--surface); }
.button.secondary, .more-menu button, .icon-button { background: var(--surface); color: var(--ink); }
.icon-button { min-width: 48px; padding: 8px; font-size: 22px; }

.related, .site-footer { margin-top: 24px; }
.related h2 { font-size: 18px; }
.related ul { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 0; list-style: none; }
a { color: var(--accent); text-underline-offset: 3px; }
.site-footer { display: grid; gap: 10px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-sub); font-size: 14px; }
.site-footer p { margin: 0; }
.safety { padding: 12px; border: 1px solid var(--warn); border-radius: 10px; color: var(--ink); }

.action-bar {
  position: fixed;
  z-index: 20;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  padding: 10px max(12px, env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.more-actions { position: relative; }
.more-actions summary { display: grid; place-items: center; min-width: 88px; list-style: none; }
.more-actions summary::-webkit-details-marker { display: none; }
.more-menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 10px);
  display: grid;
  width: min(320px, calc(100vw - 24px));
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.more-menu p { margin: 0; color: var(--ink-sub); font-size: 13px; }

.stepper {
  position: fixed;
  z-index: 50;
  inset: 0;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 100dvh;
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
  background: var(--surface);
}
.stepper header { display: flex; justify-content: space-between; align-items: center; }
.stepper h2, .step-measure { margin: 0; }
.step-measure { padding: 10px 0; color: var(--danger); font-weight: 800; text-align: center; }
.step-content { display: grid; place-content: center; text-align: center; }
.step-counter { color: var(--ink-sub); font-family: var(--num); font-size: 24px; }
.step-position { margin: 8px 0; color: var(--result); font-family: var(--num); font-size: clamp(42px, 13vw, 80px); font-weight: 900; line-height: 1.15; }
.step-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.step-actions .button { min-height: 64px; font-size: 20px; }
.stepper-open { overflow: hidden; }

.toast {
  position: fixed;
  z-index: 80;
  left: 50%;
  bottom: 92px;
  translate: -50% 0;
  width: max-content;
  max-width: calc(100vw - 32px);
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--surface);
  font-weight: 750;
}

@media (min-width: 620px) {
  .mode-tabs { grid-template-columns: repeat(4, 1fr); }
  .action-bar { left: 50%; width: min(100%, 760px); translate: -50% 0; border: 1px solid var(--line); border-bottom: 0; border-radius: 14px 14px 0 0; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111820;
    --surface: #19232e;
    --ink: #f1f5f8;
    --ink-sub: #b5c0ca;
    --line: #425160;
    --accent: #67adf4;
    --result: #61d69d;
    --warn: #e7b85c;
    --danger: #ff8a80;
    --focus: #8fc6ff;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  :root { color-scheme: light; }
  body { background: var(--surface); }
  .app-shell { width: 100%; padding: 0; }
  .pwa-banner, .ios-guide, .preset, .mode-tabs, .input-card, .sumidashi-open, .related, .site-footer, .action-bar, .stepper, .toast { display: none !important; }
  .result-card { border: 0; padding: 0; }
  .position-list { grid-template-columns: repeat(2, 1fr); gap: 0 24px; }
  .position-list li { break-inside: avoid; }
}