:root {
  --bg: #ffffff;
  --ink: #1d2433;
  --muted: #5b6475;
  --line: #dfe3ea;
  --soft: #f4f6f9;
  --navy: #1b3a5c;
  --navy-2: #2b5582;
  --ok: #1f6b45;
  --ok-bg: #eef6f1;
  --warn: #8a5a12;
  --warn-bg: #fbf5ea;
  --ng: #9b2c2c;
  --ng-bg: #fbf1f1;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Segoe UI", Roboto, sans-serif;
  font-size: 16px; line-height: 1.65; overflow-wrap: anywhere;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
a { color: var(--navy-2); }
.top { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 5; }
.top-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; height: 48px; }
.brand { font-weight: 700; font-size: 13px; color: var(--navy); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.checked-chip { flex: none; font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; }
h1 { font-size: 23px; line-height: 1.35; margin: 22px 0 8px; color: var(--navy); letter-spacing: .01em; }
.sp { display: none; }
.lead { margin: 0 0 10px; }
.checked-note { margin: 0 0 8px; font-size: 13px; color: var(--ink); background: var(--soft); border-left: 3px solid var(--navy); padding: 8px 10px; border-radius: 0 8px 8px 0; }
.privacy { margin: 0 0 16px; font-size: 13px; color: var(--muted); display: flex; gap: 6px; align-items: flex-start; }
.lock { flex: none; width: 10px; height: 12px; margin-top: 4px; border: 2px solid var(--muted); border-radius: 2px; position: relative; }
.lock::before { content: ""; position: absolute; left: 0; top: -7px; width: 6px; height: 6px; border: 2px solid var(--muted); border-bottom: 0; border-radius: 4px 4px 0 0; }

/* mode switch */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: var(--soft); border-radius: 12px; padding: 4px; margin: 0 0 12px; }
.mode { border: 0; background: transparent; border-radius: 9px; padding: 9px 6px; color: var(--muted); cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 1px; font: inherit; }
.mode-t { font-weight: 700; font-size: 15px; }
.mode-s { font-size: 11px; }
.mode[aria-selected="true"] { background: #fff; color: var(--navy); box-shadow: 0 1px 2px rgba(0,0,0,.08); }

.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px 16px; margin: 0 0 16px; background: #fff; }
.q { border: 0; margin: 0 0 14px; padding: 0; min-width: 0; }
.q legend { font-weight: 700; font-size: 15px; margin-bottom: 8px; padding: 0; display: flex; align-items: center; gap: 8px; }
.qn { display: inline-flex; width: 22px; height: 22px; border-radius: 50%; background: var(--navy); color: #fff; font-size: 12px; align-items: center; justify-content: center; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips.checks { margin-top: 10px; }
.chip { position: relative; cursor: pointer; }
.chip input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.chip span { display: inline-block; border: 1px solid #b9c1ce; border-radius: 999px; padding: 7px 14px; font-size: 14px; background: #fff; color: var(--ink); }
.chip input:checked + span { background: var(--navy); border-color: var(--navy); color: #fff; }
.chip input:focus-visible + span { outline: 2px solid var(--navy-2); outline-offset: 2px; }
.chip input:disabled + span { opacity: .4; cursor: not-allowed; }
.checks .chip input:checked + span::before { content: "✓ "; }
.sub { margin-top: 10px; }
.sub.nomt { margin-top: 0; }
.sublabel { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
select { width: 100%; max-width: 100%; font-size: 16px; padding: 10px 12px; border: 1px solid #b9c1ce; border-radius: 10px; background: #fff; color: var(--ink); }
select:focus { outline: 2px solid var(--navy-2); outline-offset: 1px; }
.go { display: block; width: 100%; background: var(--navy); color: #fff; border: 0; border-radius: 10px; padding: 13px; font-size: 16px; font-weight: 700; cursor: pointer; margin-top: 4px; }
.go:active { background: var(--navy-2); }
.msg { margin: 12px 0 0; padding: 10px 12px; border-radius: 10px; background: var(--ng-bg); color: var(--ng); font-size: 14px; }

/* result */
.res-head { border: 2px solid var(--navy); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; }
.res-kicker { font-size: 12px; color: var(--muted); margin: 0; letter-spacing: .04em; }
.res-title { font-size: 20px; font-weight: 800; color: var(--navy); margin: 2px 0 6px; line-height: 1.35; }
.res-sub { font-size: 13px; color: var(--muted); margin: 0; }
.sec { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; }
.sec h2 { font-size: 16px; margin: 0 0 10px; color: var(--navy); }
.steps { margin: 0; padding-left: 1.4em; }
.steps li { margin: 0 0 8px; }
.steps li:last-child { margin-bottom: 0; }
.src { font-size: 12px; margin-left: 4px; white-space: nowrap; }
.opt { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin: 0 0 10px; }
.opt:last-child { margin-bottom: 0; }
.opt.first { border-color: var(--navy); box-shadow: inset 3px 0 0 var(--navy); }
.opt h3 { font-size: 15px; margin: 0 0 6px; line-height: 1.45; }
.tag { display: inline-block; font-size: 11px; font-weight: 700; color: var(--navy); background: #e8eef5; border-radius: 4px; padding: 1px 6px; margin-bottom: 4px; }
.why { font-size: 13px; color: var(--navy); margin: 0 0 6px; }
.cost { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; margin: 6px 0; font-size: 14px; background: var(--soft); border-radius: 8px; padding: 8px 10px; }
.cost dt { color: var(--ink); }
.cost dd { margin: 0; font-weight: 700; text-align: right; white-space: nowrap; }
.cost dd.txt { font-weight: 400; white-space: normal; text-align: left; grid-column: 1 / -1; color: var(--muted); font-size: 13px; margin-top: -2px; }
.notes, .cautions { margin: 6px 0 0; padding-left: 1.2em; font-size: 13px; }
.notes li, .cautions li { margin: 3px 0; }
.cautions { list-style: none; padding-left: 0; }
.cautions li { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 6px 10px; }
.olink { font-size: 13px; margin: 8px 0 0; }
.note { font-size: 12px; color: var(--muted); margin: 8px 0 0; }

/* compare */
.cmp { width: 100%; border-collapse: collapse; font-size: 14px; }
.cmp th, .cmp td { border-bottom: 1px solid var(--line); padding: 8px 8px; text-align: left; vertical-align: top; }
.cmp thead th { font-size: 12px; color: var(--muted); font-weight: 600; background: var(--soft); }
.cmp tbody th { color: var(--navy); font-size: 14px; min-width: 9em; }
.cmp .pv { display: block; font-size: 11px; color: var(--muted); font-weight: 400; }
.cmp .num { font-weight: 700; }
.cmp .small { display: block; font-size: 12px; color: var(--muted); font-weight: 400; white-space: normal; }
.cmp-notes { margin: 4px 0 0; padding-left: 1.1em; font-size: 12px; color: var(--muted); }
.hints { margin: 0; padding: 0; list-style: none; }
.hints li { padding: 8px 10px; border-radius: 8px; background: var(--soft); margin-bottom: 8px; font-size: 14px; }
.hints li.warn { background: var(--warn-bg); color: var(--warn); }
.ref { font-size: 14px; background: var(--soft); border-radius: 8px; padding: 10px 12px; margin: 0; }
.srcs { font-size: 13px; margin: 0; padding-left: 1.2em; }
.srcs li { margin: 3px 0; word-break: break-word; }
.again { display: block; width: 100%; margin: 4px 0 16px; padding: 12px; background: none; border: 1px solid var(--navy); color: var(--navy); border-radius: 10px; font-size: 15px; cursor: pointer; }

@media (max-width: 640px) {
  .sp { display: inline; }
  .cmp thead { display: none; }
  .cmp, .cmp tbody, .cmp tr, .cmp th, .cmp td { display: block; width: 100%; }
  .cmp tr { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 10px; padding: 4px 0; }
  .cmp tbody th { border-bottom: 1px solid var(--line); padding: 8px 12px; background: var(--soft); border-radius: 10px 10px 0 0; margin-top: -4px; }
  .cmp td { border: 0; padding: 4px 12px; display: grid; grid-template-columns: 6.5em 1fr; gap: 8px; }
  .cmp td::before { content: attr(data-label); color: var(--muted); font-size: 12px; padding-top: 2px; }
  .cmp td.wide { display: block; }
  .cmp td.wide::before { display: block; }
}

/* ads */
.adbox { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px 16px; margin: 8px 0 16px; background: #fbfcfd; }
.adbox-h { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 4px; }
.adbox-h h2 { font-size: 14px; margin: 0; color: var(--ink); }
.adtag { flex: none; font-size: 11px; color: var(--muted); border: 1px solid #aab2c0; border-radius: 4px; padding: 0 6px; line-height: 1.6; }
.adsep { font-size: 11px; color: var(--muted); margin: 0 0 6px; }
.ad-slot { margin-top: 10px; text-align: center; overflow: hidden; }
.ad-slot img { max-width: 100%; height: auto; }
.ad-cap { font-size: 12px; color: var(--muted); margin: 4px 0 0; }

.foot { font-size: 12px; color: var(--muted); padding-top: 8px; padding-bottom: 32px; border-top: 1px solid var(--line); margin-top: 8px; }
.foot p { margin: 6px 0; }

/* 比較表は幅720pxの枠では列が細くなりすぎるため、PCでもカード表示にする（10/19） */
.cmp thead { display: none; }
.cmp, .cmp tbody, .cmp tr, .cmp th, .cmp td { display: block; width: 100%; }
.cmp tr { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 10px; padding: 4px 0; }
.cmp tbody th { border-bottom: 1px solid var(--line); padding: 8px 12px; background: var(--soft); border-radius: 10px 10px 0 0; margin-top: -4px; }
.cmp td { border: 0; padding: 4px 12px; display: grid; grid-template-columns: 7.5em 1fr; gap: 8px; }
.cmp td::before { content: attr(data-label); color: var(--muted); font-size: 12px; padding-top: 2px; }
.cmp td.wide { display: block; }
.cmp td.wide::before { display: block; }