:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2933;
  --muted: #61707f;
  --line: #dde3e9;
  --primary: #0f766e;
  --primary-text: #ffffff;
  --plus: #0f7a3d;
  --minus: #c62828;
  --minus-bg: #fdecec;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111518;
    --card: #1b2126;
    --text: #e8edf1;
    --muted: #9aa8b5;
    --line: #2d363e;
    --primary: #2bb5a6;
    --primary-text: #062824;
    --plus: #4cc77f;
    --minus: #ff7b7b;
    --minus-bg: #3a1f22;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.top {
  padding: calc(16px + env(safe-area-inset-top)) 16px 8px;
  max-width: 640px;
  margin: 0 auto;
}
.top h1 { margin: 0; font-size: 22px; color: var(--primary); }
.top p { margin: 2px 0 0; color: var(--muted); font-size: 14px; }

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 8px 16px calc(24px + env(safe-area-inset-bottom));
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

h2 { margin: 0 0 12px; font-size: 18px; display: flex; align-items: center; gap: 8px; }
h3 { margin: 0 0 4px; font-size: 16px; }

.step {
  display: inline-grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--primary-text);
  font-size: 14px;
}

.btn {
  display: inline-block;
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { opacity: 0.7; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}
.btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-danger { color: var(--minus); margin-top: 16px; }
.btn-block { display: block; width: 100%; margin-top: 10px; }
.btn-small { min-height: 44px; padding: 8px 12px; flex: 0 0 auto; }

.hint { color: var(--muted); font-size: 13px; margin: 8px 0; }
.hint a { color: var(--primary); }

.message {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg);
  font-size: 14px;
  white-space: pre-line;
}
.message.warn { background: var(--minus-bg); }

.error { color: var(--minus); font-size: 14px; margin: 4px 0 0; }

details { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 8px; }
summary { cursor: pointer; font-weight: 600; padding: 10px 0; min-height: 44px; }

textarea, input[type="text"], select {
  width: 100%;
  font: inherit;
  font-size: 16px; /* iOSで入力時に拡大されないよう16px以上 */
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
}

form label, .mapping label {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted);
}
form label input, .mapping label select { margin-top: 4px; }
.fee-row { display: flex; gap: 8px; margin-top: 4px; }
.fee-row input { margin-top: 0; }

.mapping { margin-top: 12px; padding: 0 12px 12px; border: 1px solid var(--line); border-radius: 12px; }

.summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}
.stat { background: var(--bg); border-radius: 12px; padding: 10px 12px; display: flex; flex-direction: column; }
.stat-wide { grid-column: 1 / -1; }
.stat .label { font-size: 13px; color: var(--muted); }
.stat .value { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-wide .value { font-size: 28px; }
.stat .sub { font-size: 13px; color: var(--muted); }

.plus { color: var(--plus); }
.minus { color: var(--minus); }

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg);
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}
.tabs button, .row {
  -webkit-tap-highlight-color: transparent;
}
.tabs button {
  min-height: 44px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.tabs button[aria-selected="true"] { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1); }

.list { list-style: none; margin: 0; padding: 0; }
.list li { border-bottom: 1px solid var(--line); }
.list li:last-child { border-bottom: 0; }

.row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 56px;
  padding: 10px 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.rank {
  display: inline-grid;
  place-items: center;
  min-width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--minus-bg);
  color: var(--minus);
  font-weight: 700;
  font-size: 14px;
}
.no { color: var(--muted); font-size: 13px; min-width: 20px; }
.row .name { overflow-wrap: anywhere; }
.row .nums { text-align: right; font-variant-numeric: tabular-nums; }
.row .profit { display: block; font-weight: 700; }
.row .margin { display: block; font-size: 13px; color: var(--muted); }

.detail { padding: 0 0 12px; font-size: 14px; }
.detail table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.detail td { padding: 4px 0; border-bottom: 1px dashed var(--line); }
.detail td:last-child { text-align: right; }
.detail tr.total td { font-weight: 700; border-bottom: 0; }
.formula { margin-top: 8px; padding: 8px 10px; background: var(--bg); border-radius: 8px; overflow-wrap: anywhere; }
.formula b { display: block; font-size: 12px; color: var(--muted); font-weight: 600; }
.detail .btn { margin-top: 8px; min-height: 40px; padding: 6px 12px; color: var(--minus); font-size: 14px; }

.empty { color: var(--muted); text-align: center; padding: 16px 0; }

.privacy { color: var(--muted); font-size: 12px; text-align: center; }