:root {
  --bg: #f4f6f3;
  --card: #ffffff;
  --text: #1f2624;
  --muted: #66706c;
  --line: #dde3df;
  --accent: #13806a;
  --accent-ink: #ffffff;
  --accent-soft: #e5f3ee;
  --chip: #edf1ee;
  --icon: #8a948f;
  --hover: #e2e8e4;
  --inverse-bg: #1f2624;
  --inverse-fg: #ffffff;
  --link: #11705d;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151918; --card: #1f2422; --text: #e9eeeb; --muted: #9ea8a3; --line: #323a37;
    --accent: #3fbf9f; --accent-ink: #0f1513; --accent-soft: #1d3530; --chip: #29302d; --icon: #96a19c;
    --hover: #323a37; --inverse-bg: #e9eeeb; --inverse-fg: #151918; --link: #6fd5bb; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #151918; --card: #1f2422; --text: #e9eeeb; --muted: #9ea8a3; --line: #323a37;
  --accent: #3fbf9f; --accent-ink: #0f1513; --accent-soft: #1d3530; --chip: #29302d; --icon: #96a19c;
  --hover: #323a37; --inverse-bg: #e9eeeb; --inverse-fg: #151918; --link: #6fd5bb; color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

a { color: var(--link); }
h1 { font-size: 24px; line-height: 1.35; margin: 8px 0 4px; }
h2 { font-size: 18px; margin: 28px 0 10px; }
h3 { font-size: 15px; margin: 18px 0 8px; }

.site-header {
  height: 52px; display: flex; align-items: center; gap: 14px;
  padding: 0 16px; border-bottom: 1px solid var(--line); background: var(--card);
}
.logo { font-weight: 800; font-size: 18px; color: var(--accent); text-decoration: none; }
.lang-switch {
  margin-left: auto; padding: 3px 10px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--text); font-size: 13px; text-decoration: none; background: var(--card);
}
.lang-switch:hover { background: var(--chip); }

.wrap { max-width: 760px; margin: 0 auto; padding: 12px 16px 24px; }
.lead { color: var(--muted); margin: 0 0 14px; font-size: 14px; }

/* 計算機 */
.calc {
  position: relative;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px; margin-bottom: 14px;
}
.calc h2 { margin: 0 0 10px; font-size: 16px; }

.dims {
  display: flex; gap: 2px; padding: 3px; margin-bottom: 10px;
  background: var(--chip); border-radius: 999px; overflow-x: auto; scrollbar-width: none;
}
.dims::-webkit-scrollbar { display: none; }
.dims button {
  flex: 1 0 auto; border: 0; background: transparent; color: var(--muted); cursor: pointer;
  padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 700; font-family: inherit;
}
.dims button[aria-selected="true"] { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, .12); }

.input-row { display: flex; gap: 8px; }
.input-row input, .input-row select {
  min-width: 0; background: var(--card); color: var(--text); font: inherit; font-size: 18px;
  border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px;
}
.input-row input { flex: 1 1 50%; font-weight: 700; }
.input-row select { flex: 1 1 50%; }
.input-row input:focus, .input-row select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.pin { margin: 12px 0 10px; padding: 14px; border-radius: 12px; background: var(--accent-soft); }
.pin-sentence { margin: 0; font-size: 17px; line-height: 1.5; }
.pin-sentence b { display: block; font-size: 30px; line-height: 1.25; color: var(--accent); overflow-wrap: anywhere; }
.pin-name { font-weight: 700; }
.pin-empty { margin: 0; color: var(--muted); }
.pin-icons { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 4px 6px; margin-top: 10px; }
.pin-icons svg { fill: var(--accent); color: var(--accent); display: block; }
.pin-icons .part { display: block; overflow: hidden; }
.pin-more { display: inline-block; margin-top: 8px; font-size: 13px; }

.results { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.results li { border-bottom: 1px solid var(--line); }
.results button {
  width: 100%; display: flex; align-items: center; gap: 10px; padding: 8px 4px;
  border: 0; background: transparent; color: var(--text); font: inherit; text-align: left; cursor: pointer;
}
.results button:hover { background: var(--chip); }
.results button[aria-pressed="true"] { background: var(--accent-soft); }
.r-icon { flex: none; width: 44px; display: flex; justify-content: center; }
.r-icon svg { fill: var(--icon); color: var(--icon); max-width: 44px; }
.results button[aria-pressed="true"] .r-icon svg { fill: var(--accent); color: var(--accent); }
.r-name { flex: 1; min-width: 0; font-size: 14px; line-height: 1.35; }
.r-name small { display: block; color: var(--muted); font-size: 12px; }
.r-count { flex: none; max-width: 48%; text-align: right; font-weight: 700; font-size: 15px; overflow-wrap: anywhere; }

.badge {
  padding: 0 6px; border-radius: 999px; background: var(--chip); color: var(--muted);
  font-size: 11px; font-weight: 700; white-space: nowrap;
}

.calc-foot { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit;
  padding: 6px 14px; border-radius: 999px; font-size: 13px; cursor: pointer;
}
.btn:hover { background: var(--chip); }
.toast {
  background: var(--inverse-bg); color: var(--inverse-fg); font-size: 13px; padding: 4px 12px; border-radius: 999px;
  opacity: 0; transition: opacity .2s; pointer-events: none;
}
.toast.show { opacity: 1; }

.rev-out { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.rev-out li { padding: 4px 10px; border-radius: 999px; background: var(--chip); font-size: 14px; font-weight: 700; }
.rev-out .rev-head { flex-basis: 100%; padding: 0; background: none; font-weight: 400; color: var(--muted); }

/* ここから下は検索から来た人向けの説明 */
.article p { margin: 0 0 10px; }
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); }
.article table { width: 100%; border-collapse: collapse; background: var(--card); font-size: 14px; }
.article th, .article td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.article tr:last-child td { border-bottom: 0; }
.article th { background: var(--chip); font-weight: 700; white-space: nowrap; }
.sources { padding-left: 20px; font-size: 14px; }
.small { color: var(--muted); font-size: 13px; }

.links { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.links a {
  display: inline-block; padding: 5px 12px; background: var(--card);
  border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: 14px;
}
.links a:hover { background: var(--chip); }

.site-footer { max-width: 760px; margin: 0 auto; padding: 16px; color: var(--muted); font-size: 12px; }
.site-footer a { color: var(--muted); }

.doc h2 { margin-top: 28px; }
.doc p, .doc li { line-height: 1.9; }

@media (max-width: 480px) {
  h1 { font-size: 21px; }
  .pin-sentence b { font-size: 26px; }
  .dims button { padding: 6px 8px; font-size: 13px; }
  .article th, .article td { padding: 7px 9px; }
}