:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #eef3f9;
  --text: #182230;
  --muted: #617084;
  --line: #dbe4ef;
  --brand: #155eef;
  --brand-strong: #0b4bd4;
  --accent: #ffb020;
  --success: #16845b;
  --danger: #c4323f;
  --shadow: 0 12px 34px rgba(31, 52, 82, .10);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand-strong); }
img { max-width: 100%; height: auto; }
button, input, select { font: inherit; }
.container { width: min(calc(100% - 32px), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(219,228,239,.9);
}
.header-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.logo-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; color: white; background: linear-gradient(135deg, var(--brand), #5d8cff); box-shadow: 0 7px 18px rgba(21,94,239,.25); }
.nav { display: flex; gap: 18px; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-size: .93rem; font-weight: 700; }
.nav a:hover { color: var(--text); }
.menu-button { display:none; border:1px solid var(--line); background:#fff; border-radius:10px; padding:8px 11px; }
.hero { padding: 64px 0 38px; background:
  radial-gradient(circle at 84% 10%, rgba(21,94,239,.16), transparent 29%),
  radial-gradient(circle at 5% 50%, rgba(255,176,32,.15), transparent 24%);
}
.hero-grid { display:grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items:center; }
.eyebrow { display:inline-flex; align-items:center; gap:8px; font-size:.82rem; font-weight:800; color:var(--brand); background:#eaf1ff; border:1px solid #cfe0ff; border-radius:999px; padding:6px 11px; }
h1,h2,h3 { line-height:1.3; letter-spacing:-.035em; }
h1 { font-size: clamp(2.05rem, 5vw, 4rem); margin: 18px 0 18px; }
h2 { font-size: clamp(1.45rem, 3vw, 2.25rem); margin: 0 0 16px; }
h3 { font-size: 1.12rem; margin: 0 0 8px; }
.hero p { font-size:1.08rem; color:var(--muted); max-width: 720px; }
.hero-points { display:flex; flex-wrap:wrap; gap:9px; margin-top:24px; }
.pill { background:#fff; border:1px solid var(--line); border-radius:999px; padding:7px 12px; font-size:.86rem; font-weight:700; box-shadow:0 3px 12px rgba(31,52,82,.05); }
.hero-card { background:linear-gradient(145deg,#fff,#f8fbff); border:1px solid #d7e3f2; border-radius:28px; padding:26px; box-shadow:var(--shadow); }
.mini-result { background:#13233b; color:white; border-radius:20px; padding:22px; }
.mini-result small { color:#b9c7db; }
.mini-result strong { display:block; font-size:2.25rem; margin-top:4px; letter-spacing:-.04em; }
.mini-list { display:grid; gap:10px; margin-top:16px; }
.mini-row { display:flex; justify-content:space-between; gap:16px; font-size:.9rem; color:#d5dfed; }
.section { padding: 64px 0; }
.section-tight { padding: 38px 0; }
.section-title { max-width:760px; margin-bottom:26px; }
.section-title p { margin:0; color:var(--muted); }
.grid-2 { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:22px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:20px; }
.card { background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:24px; box-shadow:0 8px 24px rgba(31,52,82,.06); }
.card-link { color:inherit; text-decoration:none; transition:.18s transform,.18s box-shadow; }
.card-link:hover { transform:translateY(-2px); box-shadow:var(--shadow); color:inherit; }
.card-icon { width:44px; height:44px; display:grid; place-items:center; border-radius:13px; background:#eaf1ff; color:var(--brand); font-size:1.25rem; margin-bottom:15px; }
.card p { color:var(--muted); margin:0; }
.calculator-shell { display:grid; grid-template-columns:minmax(0,1fr) minmax(300px,.75fr); gap:24px; align-items:start; }
.form-card, .result-card { background:#fff; border:1px solid var(--line); border-radius:22px; padding:26px; box-shadow:var(--shadow); }
.result-card { position:sticky; top:92px; background:linear-gradient(160deg,#10223c,#183b6d); color:#fff; border-color:transparent; }
.field-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; }
.field { display:grid; gap:7px; }
.field.full { grid-column:1/-1; }
label { font-size:.9rem; font-weight:800; }
.hint { color:var(--muted); font-size:.78rem; line-height:1.5; }
.input-wrap { position:relative; }
.input-wrap input, .input-wrap select, input[type="number"], input[type="text"], select {
  width:100%; border:1px solid #cbd7e5; border-radius:12px; background:#fff; color:var(--text); padding:12px 42px 12px 13px; outline:none; transition:.15s border,.15s box-shadow;
}
input:focus, select:focus { border-color:var(--brand); box-shadow:0 0 0 4px rgba(21,94,239,.12); }
.suffix { position:absolute; right:13px; top:50%; transform:translateY(-50%); color:var(--muted); font-size:.84rem; font-weight:700; pointer-events:none; }
.check-row { display:flex; align-items:flex-start; gap:10px; padding:13px; background:var(--surface-2); border-radius:12px; }
.check-row input { margin-top:5px; }
.advanced { margin-top:18px; border-top:1px solid var(--line); padding-top:18px; }
.advanced summary { cursor:pointer; font-weight:800; color:var(--brand); }
.advanced .field-grid { margin-top:16px; }
.result-label { color:#b8c9df; font-size:.86rem; }
.result-main { font-weight:900; font-size:clamp(2rem,5vw,3.1rem); line-height:1.2; letter-spacing:-.04em; margin:5px 0 20px; }
.result-list { display:grid; gap:0; border-top:1px solid rgba(255,255,255,.17); }
.result-row { display:flex; justify-content:space-between; gap:16px; padding:13px 0; border-bottom:1px solid rgba(255,255,255,.13); }
.result-row span:first-child { color:#c2d0e2; }
.result-row strong { text-align:right; }
.result-note { margin:16px 0 0; color:#b8c9df; font-size:.78rem; line-height:1.6; }
.btn-row { display:flex; flex-wrap:wrap; gap:10px; margin-top:18px; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; border:0; border-radius:11px; padding:11px 15px; font-weight:800; cursor:pointer; text-decoration:none; }
.btn-primary { background:var(--brand); color:white; }
.btn-primary:hover { background:var(--brand-strong); color:white; }
.btn-ghost { background:#eef3f9; color:var(--text); }
.callout { background:#fff8e7; border:1px solid #f7d98a; border-radius:16px; padding:18px 20px; }
.callout strong { color:#7b5200; }
.notice { background:#eef6ff; border:1px solid #cde0f7; border-radius:16px; padding:18px 20px; }
.article { max-width:800px; margin:0 auto; }
.article-header { padding:52px 0 28px; }
.article-header h1 { font-size:clamp(2rem,5vw,3.25rem); }
.article-meta { color:var(--muted); font-size:.88rem; }
.article-body { background:#fff; border:1px solid var(--line); border-radius:22px; padding:clamp(22px,5vw,46px); box-shadow:var(--shadow); }
.article-body h2 { margin-top:2.2em; padding-top:.2em; }
.article-body h3 { margin-top:1.7em; }
.article-body p, .article-body li { color:#354256; }
.article-body table { width:100%; border-collapse:collapse; margin:20px 0; font-size:.92rem; }
.article-body th, .article-body td { border:1px solid var(--line); padding:10px; text-align:left; }
.article-body th { background:var(--surface-2); }
.breadcrumbs { color:var(--muted); font-size:.82rem; padding-top:20px; }
.breadcrumbs a { color:var(--muted); }
.faq { display:grid; gap:12px; }
.faq details { background:#fff; border:1px solid var(--line); border-radius:14px; padding:15px 18px; }
.faq summary { cursor:pointer; font-weight:800; }
.faq p { color:var(--muted); }
.cta { background:linear-gradient(135deg,#0e4bcf,#3176ff); color:#fff; border-radius:24px; padding:34px; }
.cta p { color:#dce8ff; }
.cta .btn { background:#fff; color:#154ebc; }
.site-footer { background:#132033; color:#c5cfdd; padding:44px 0 26px; margin-top:64px; }
.footer-grid { display:grid; grid-template-columns:1.2fr repeat(2,.8fr); gap:28px; }
.footer-title { color:#fff; font-weight:900; margin-bottom:8px; }
.footer-links { display:grid; gap:8px; }
.footer-links a { color:#c5cfdd; text-decoration:none; }
.copyright { border-top:1px solid rgba(255,255,255,.12); margin-top:30px; padding-top:20px; font-size:.82rem; }
.compare-grid { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.offer { border:1px solid var(--line); border-radius:18px; padding:20px; }
.offer h2 { font-size:1.3rem; }
.comparison-result { margin-top:22px; padding:22px; background:#13233b; color:#fff; border-radius:18px; }
.metric-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:12px; }
.metric { background:rgba(255,255,255,.08); padding:14px; border-radius:12px; }
.metric small { color:#b8c9df; display:block; }
.metric strong { font-size:1.22rem; }
.status-good { color:#78e3b8; }
.tag { display:inline-flex; border-radius:999px; padding:4px 9px; background:#eef3f9; color:#526174; font-size:.75rem; font-weight:800; }
@media (max-width: 860px) {
  .hero-grid, .calculator-shell, .footer-grid { grid-template-columns:1fr; }
  .grid-3 { grid-template-columns:1fr 1fr; }
  .result-card { position:static; }
  .nav { display:none; position:absolute; top:68px; left:0; right:0; background:#fff; border-bottom:1px solid var(--line); padding:16px; flex-direction:column; align-items:flex-start; }
  .nav.open { display:flex; }
  .menu-button { display:block; }
}
@media (max-width: 620px) {
  .container { width:min(calc(100% - 22px),var(--max)); }
  .hero { padding-top:42px; }
  .grid-2, .grid-3, .field-grid, .compare-grid, .metric-grid { grid-template-columns:1fr; }
  .form-card, .result-card, .card { padding:20px; }
  .section { padding:48px 0; }
  .hero-card { padding:18px; }
}
@media print {
  .site-header,.site-footer,.btn-row,.hero,.tools-nav { display:none!important; }
  body { background:#fff; }
  .result-card { color:#000; background:#fff; border:1px solid #ccc; }
  .result-label,.result-row span:first-child,.result-note { color:#333; }
}