:root {
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans JP", sans-serif;
  color: #172f35;
  background: #f5f7f8;
  font-size: 1rem;
  --accent: #09695b;
  --surface: #ffffff;
  --canvas: #f5f7f8;
  --text: #172f35;
  --radius: 14px;
  --content-width: 1120px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --muted: #52686d;
  --border: #d6e1e3;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--accent); text-underline-offset: 4px; }
header, footer, main { max-width: var(--content-width); margin: auto; }
header, footer { padding: 20px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
header { border-bottom: 1px solid var(--border); }
.brand { color: #172f35; text-decoration: none; font-size: 1.25rem; font-weight: 800; }
header > span { color: var(--muted); font-size: 0.8125rem; }
main { padding: 28px 24px 48px; }
.eyebrow { color: var(--accent); font-size: 0.75rem; font-weight: 750; letter-spacing: .1em; margin: 0 0 8px; }
h1 { font-size: clamp(1.625rem, 4vw, 2.25rem); line-height: 1.45; letter-spacing: .01em; margin: 0 0 8px; }
h2 { font-size: 1.25rem; line-height: 1.5; margin: 0 0 8px; }
h3 { font-size: 1.0625rem; line-height: 1.6; }
p { line-height: 1.85; }
.intro > p:last-of-type { color: var(--muted); margin: 0; }
.page-links { display: flex; flex-wrap: wrap; gap: 8px 24px; margin: 8px 0 24px; }
.page-links a { font-size: 0.875rem; padding: 6px 0; }

.panel { background: white; border: 1px solid var(--border); border-radius: 14px; padding: 24px; min-width: 0; }
.muted { font-size: 0.875rem; color: var(--muted); line-height: 1.8; margin: 8px 0 16px; }
fieldset { border: 0; padding: 0; margin: 24px 0; min-width: 0; }
legend { font-weight: 750; margin-bottom: 14px; padding: 0; }
legend b { font-size: 0.8125rem; color: var(--accent); margin-right: 10px; }
legend small { font-size: 0.875rem; font-weight: 400; color: var(--muted); margin-left: 8px; }
label { font-size: 0.875rem; font-weight: 650; }
label > span { display: flex; align-items: center; background: #f7f9fa; border: 1px solid #aabfc4; border-radius: 8px; margin-top: 7px; padding-right: 8px; color: var(--muted); font-size: 0.8125rem; font-weight: 400; }
input[type=number] { width: 100%; min-width: 0; border: 0; background: transparent; font: inherit; font-size: 1.3125rem; font-weight: 600; color: #172f35; padding: 13px 4px 13px 10px; appearance: textfield; }
input::-webkit-inner-spin-button { appearance: none; }
input[type=number]:focus { outline: none; }
label > span:focus-within { outline: 3px solid #72bdb1; outline-offset: 2px; }
button { display: flex; justify-content: space-between; align-items: center; gap: 8px; width: 100%; background: var(--accent); border: 0; border-radius: 8px; color: white; font: inherit; font-weight: 700; padding: 17px; cursor: pointer; }
button:hover { background: #07574c; }
:focus-visible { outline: 3px solid #cc7d14; outline-offset: 4px; }
.privacy { text-align: center; color: var(--muted); font-size: 0.75rem; margin: 16px 0 0; }
.result-heading { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; }
.result-heading h2 { margin: 0; scroll-margin-top: 20px; }
.badge { background: #e5f4ef; color: #075b4d; border-radius: 30px; padding: 6px 10px; font-size: 0.75rem; font-weight: 700; }
.badge:empty { display: none; }
.recommended { background: #f0f8f6; border: 1px solid #c6dfd9; border-radius: 10px; padding: 20px; }
.card-label { font-size: 0.875rem; margin: 0; }
.total { font-size: 4rem; font-weight: 800; line-height: 1.15; letter-spacing: -.04em; margin: 8px 0; color: var(--accent); overflow-wrap: anywhere; }
.total span { font-size: 1.125rem; letter-spacing: 0; margin-left: 8px; }
summary { cursor: pointer; font-weight: 650; line-height: 1.8; padding: 20px 0; }
summary::marker { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 10; background: white; padding: 12px; }
.skip-link:focus { top: 12px; }
.secondary-button { background: white; border: 1px solid #aabfc4; color: var(--accent); justify-content: center; margin-top: 18px; font-size: .875rem; padding: 13px; }
.secondary-button:hover { background: #f0f8f6; }
/* 共通ヘッダー・情報ページ・ツール一覧 */
.site-header { min-height: 76px; gap: 16px; }
.site-header .brand { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.brand-mark { display: inline-grid; place-items: center; width: 34px; height: 34px; background: var(--accent); color: white; border-radius: 8px; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-header nav a { color: var(--muted); font-size: .875rem; text-decoration: none; padding: 12px 0; }
.site-header nav a:hover { color: var(--accent); text-decoration: underline; }
.site-header nav a[aria-current="page"] { color: var(--accent); font-weight: 750; text-decoration: underline; }
.site-footer { display: flex; flex-wrap: wrap; align-items: start; border-top: 1px solid var(--border); padding-block: 28px; }
.site-footer p { margin: 8px 0 0; font-size: .875rem; color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 20px; max-width: 460px; }
.site-footer nav a { font-size: .875rem; padding-block: 8px; }
.site-footer small { font-size: .75rem; color: var(--muted); }
.breadcrumbs { font-size: .8125rem; color: var(--muted); margin: 0 0 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumbs a { color: var(--muted); }
.trust-line { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: .75rem; color: var(--muted); margin: 12px 0; }
.info-page { max-width: 850px; }
.info-page .panel { margin-top: 24px; }
.info-page li { line-height: 1.85; margin-block: 8px; }
.info-page a { overflow-wrap: anywhere; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 20px; margin-top: 24px; }
.tool-card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; color: var(--text); text-decoration: none; }
.tool-card:hover { border-color: var(--accent); box-shadow: 0 4px 16px #172f350a; }
.tool-card h2 { margin: 12px 0; font-size: 1.25rem; }
.tool-card p { color: var(--muted); margin: 0 0 16px; }
.tool-card .card-action { color: var(--accent); font-weight: 700; }
.category-label { font-size: .75rem; color: var(--accent); font-weight: 700; }
.section-block { margin-block: 36px; }
.notice { background: #fff9ed; border-left: 3px solid #c78b31; padding: 16px 20px; line-height: 1.85; }
@media(max-width:720px) {
 .site-header { padding: 14px 16px; flex-wrap: wrap; }
 .site-header .brand { font-size: 1.125rem; }
 .site-header nav { gap: 16px; }
 main { padding: 20px 16px 36px; }
 .panel { padding: 18px; }
 .site-footer { padding: 24px 16px; flex-direction: column; }
 .site-footer nav { flex-direction: column; gap: 0; }
}
.tool-workspace { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: start; gap: var(--space-3); }
@media(max-width:720px) { .tool-workspace { grid-template-columns: 1fr; gap: 20px; } }