/* Code & Insights — Tools editorial styles */
:root{
  --paper:#ffffff;
  --paper-alt:#f7f5f0;
  --ink:#0a0a0a;
  --ink-dim:#555048;
  --ink-light:#8a857c;
  --rule:#e5e2dc;
  --rule-strong:#2a2a2a;
  --accent:#1a2332;
  --accent-warm:#a84c3a;
  --serif:"Source Serif 4","Noto Serif JP",Georgia,"Times New Roman",serif;
  --sans:"Inter","Noto Sans JP",system-ui,-apple-system,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);line-height:1.75;color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--ink);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:var(--ink-light)}
a:hover{color:var(--accent-warm);text-decoration-color:var(--accent-warm)}
code{font-family:"SF Mono","Menlo",monospace;font-size:.9em;background:var(--paper-alt);padding:2px 6px;border-radius:2px}
.container{max-width:880px;margin:0 auto;padding:0 24px}

/* Header — masthead */
.site-header{border-bottom:1px solid var(--rule);background:var(--paper);position:sticky;top:0;z-index:10;backdrop-filter:blur(8px);background:rgba(255,255,255,.94)}
.site-header .container{display:flex;align-items:baseline;justify-content:space-between;padding-top:20px;padding-bottom:16px}
.site-logo{font-family:var(--serif);font-size:22px;font-weight:600;letter-spacing:-.015em;color:var(--ink);text-decoration:none}
.site-logo:hover{color:var(--ink);text-decoration:none}
.site-nav a{margin-left:22px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.14em;color:var(--ink-dim);text-decoration:none}
.site-nav a:hover{color:var(--ink);text-decoration:none}

/* Page header — editorial feature */
.page-header{padding:64px 0 44px;border-bottom:1px solid var(--rule);margin-bottom:44px}
.breadcrumb{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.16em;color:var(--ink-light);margin-bottom:24px}
.breadcrumb a{color:var(--ink-light);text-decoration:none}
.breadcrumb a:hover{color:var(--ink)}
.page-header h1{font-family:var(--serif);font-size:clamp(32px,5.2vw,52px);font-weight:500;letter-spacing:-.025em;line-height:1.18;margin-bottom:20px;color:var(--ink)}
.page-header p{font-family:var(--serif);font-style:italic;color:var(--ink-dim);font-size:19px;line-height:1.6;max-width:640px}

/* Section (formerly .card) */
.card{padding:40px 0;border-top:1px solid var(--rule);margin:0;background:transparent;box-shadow:none;border-radius:0}
.card:first-of-type{border-top:none;padding-top:0}
.card-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.18em;color:var(--ink);margin-bottom:28px;display:flex;align-items:center;gap:14px}
.card-title .dot{display:none}
.card-title::before{content:"";width:28px;height:1px;background:var(--rule-strong);display:block}
.card-hint{font-size:14px;color:var(--ink-dim);margin-bottom:24px;max-width:640px;line-height:1.7}
.card-hint code{font-size:12.5px}

/* Form */
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:28px 32px;margin-bottom:20px}
.form-row.cols-3{grid-template-columns:1fr 1fr 1fr}
.form-row.cols-4{grid-template-columns:repeat(4,1fr)}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--ink);display:flex;align-items:baseline;gap:6px}
.form-group .hint{font-size:11px;color:var(--ink-light);font-weight:400;text-transform:none;letter-spacing:0}
.form-group input,.form-group select{
  padding:8px 0;border:none;border-bottom:1px solid var(--rule-strong);
  font-size:17px;font-family:var(--serif);color:var(--ink);background:transparent;
  transition:border-color .15s;border-radius:0;
}
.form-group input:focus,.form-group select:focus{outline:none;border-bottom-color:var(--accent-warm)}
.form-group input[type="number"]{font-variant-numeric:tabular-nums}
.form-group select{
  appearance:none;-webkit-appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-dim) 50%),linear-gradient(135deg,var(--ink-dim) 50%,transparent 50%);
  background-position:calc(100% - 13px) 18px,calc(100% - 8px) 18px;
  background-size:5px 5px;background-repeat:no-repeat;padding-right:24px;
}

/* Button */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 18px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;border:1px solid var(--ink);background:var(--ink);color:var(--paper);cursor:pointer;font-family:var(--sans);transition:all .15s;border-radius:0;text-decoration:none}
.btn:hover{background:var(--paper);color:var(--ink);text-decoration:none}
.btn-primary{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-sm{padding:6px 14px;font-size:10px;letter-spacing:.14em}
.btn-danger-ghost{border:1px solid var(--rule);color:var(--ink-light);background:transparent}
.btn-danger-ghost:hover{border-color:var(--accent-warm);color:var(--accent-warm);background:transparent}

/* Result — editorial data feature */
.result-panel{background:var(--paper-alt);border:none;border-top:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);padding:36px 32px;margin:36px 0;position:relative;border-radius:0}
.result-panel::before{content:"RESULT";position:absolute;top:-9px;left:32px;background:var(--paper);padding:0 10px;font-size:10px;font-weight:700;letter-spacing:.22em;color:var(--ink)}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:28px}
.result-label{font-size:10px;color:var(--ink-dim);font-weight:700;text-transform:uppercase;letter-spacing:.14em;margin-bottom:10px}
.result-value{font-family:var(--serif);font-weight:500;font-size:30px;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.1;letter-spacing:-.015em}
.result-value .unit{font-size:13px;font-family:var(--sans);font-weight:400;color:var(--ink-dim);margin-left:4px;letter-spacing:0}
.result-value.primary{font-size:42px;color:var(--accent-warm)}

/* Table — editorial grid */
.table-wrap{overflow-x:auto;margin-bottom:16px}
table{width:100%;border-collapse:collapse;font-size:14px}
thead th{text-align:left;padding:10px 14px 10px 0;color:var(--ink);font-weight:700;font-size:10.5px;text-transform:uppercase;letter-spacing:.12em;border-bottom:1.5px solid var(--ink);background:transparent}
tbody td{padding:12px 14px 12px 0;border-bottom:1px solid var(--rule);vertical-align:middle;color:var(--ink);font-family:var(--sans)}
tbody td:first-child{font-family:var(--sans);font-weight:500}
tbody tr:last-child td{border-bottom:1.5px solid var(--ink)}
tbody td input{width:100%;padding:6px 0;border:none;border-bottom:1px solid var(--rule);font-size:14px;font-family:var(--serif);font-variant-numeric:tabular-nums;background:transparent;color:var(--ink);border-radius:0}
tbody td input:focus{outline:none;border-bottom-color:var(--accent-warm)}
.num{text-align:right;font-variant-numeric:tabular-nums;font-family:var(--serif)}

/* CTA — editorial pull-quote */
.cta-section{background:transparent;color:var(--ink);border:none;border-top:2px solid var(--ink);padding:36px 0 0;margin:64px 0 0;text-align:left;border-radius:0}
.cta-section::before{content:"RELATED / SPONSORED";display:block;font-size:10px;font-weight:700;letter-spacing:.22em;color:var(--ink-light);margin-bottom:14px}
.cta-section h3{font-family:var(--serif);font-size:28px;font-weight:500;letter-spacing:-.015em;margin-bottom:14px;line-height:1.3;color:var(--ink)}
.cta-section p{color:var(--ink-dim);font-size:16px;line-height:1.75;max-width:640px;margin-bottom:22px;font-family:var(--serif);font-style:italic}
.cta-section .btn{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.cta-section .btn:hover{background:var(--paper);color:var(--ink)}
.cta-placeholder{background:var(--paper-alt);border:1px dashed var(--rule-strong);padding:14px 18px;font-size:12px;color:var(--ink-light);font-family:var(--sans);font-style:normal;margin-top:18px}

/* Sponsored — editorial PR pullout (affiliate) */
.sponsored-pullout{margin:52px 0 0;padding:0 0 0 18px;border-left:2px solid var(--accent-warm)}
.sponsored-pullout .sponsored-label{font-family:var(--sans);font-size:10px;font-weight:700;letter-spacing:.22em;color:var(--accent-warm);text-transform:uppercase;margin-bottom:22px}
.sponsored-pullout .sponsored-entry{margin-bottom:28px}
.sponsored-pullout .sponsored-entry:last-child{margin-bottom:0}
.sponsored-pullout .sponsored-entry-name{font-family:var(--serif);font-size:20px;font-weight:500;color:var(--ink);letter-spacing:-.01em;margin-bottom:10px;line-height:1.3}
.sponsored-pullout .sponsored-entry-hook{font-style:italic;font-weight:400;color:var(--ink-light);font-size:16px}
.sponsored-pullout .sponsored-entry p{font-family:var(--serif);font-size:15px;line-height:1.75;color:var(--ink-dim);margin-bottom:12px;max-width:640px}
.sponsored-pullout .sponsored-entry a{display:inline-block;font-family:var(--sans);font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--accent-warm);text-decoration:none;border-bottom:1px solid var(--accent-warm);padding-bottom:2px}
.sponsored-pullout .sponsored-entry a:hover{color:var(--ink);border-bottom-color:var(--ink)}

/* Factors — editorial verdict / recommendation grid */
.factors{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px 32px;margin-top:20px}
.factor{border-left:2px solid var(--ink);padding:6px 0 8px 16px;break-inside:avoid}
.factor.minus{border-left-color:var(--accent-warm)}
.factor-title{font-family:var(--sans);font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.16em;color:var(--ink-light);margin-bottom:10px;line-height:1.4}
.factor-val{font-family:var(--serif);font-size:20px;font-weight:500;color:var(--ink);letter-spacing:-.015em;line-height:1.3;margin-bottom:8px}
.factor.minus .factor-val{color:var(--accent-warm)}
.factor-note{font-family:var(--serif);font-size:13.5px;font-style:italic;color:var(--ink-dim);line-height:1.65}
@media (max-width:640px){
  .factors{gap:20px 0}
  .factor-val{font-size:18px}
}

/* Notice — editorial sidenote */
.notice{background:transparent;border:none;border-left:2px solid var(--ink);padding:6px 0 6px 18px;font-size:13.5px;color:var(--ink-dim);margin-bottom:24px;font-style:italic;font-family:var(--serif);border-radius:0;line-height:1.75}
.notice strong{color:var(--ink);font-style:normal;font-family:var(--sans);font-weight:700;font-size:12px;text-transform:uppercase;letter-spacing:.1em}

/* Footer */
.site-footer{background:transparent;border-top:1px solid var(--rule);padding:36px 0;margin-top:80px;color:var(--ink-light);font-size:11px;text-align:center;text-transform:uppercase;letter-spacing:.14em}
.site-footer a{color:var(--ink-light);text-decoration:none}
.site-footer a:hover{color:var(--ink)}

/* Utility */
.mt-3{margin-top:24px}
.mb-3{margin-bottom:24px}
.text-dim{color:var(--ink-dim)}
.flex{display:flex}
.flex-between{display:flex;justify-content:space-between;align-items:center}
.gap-2{gap:12px}

@media (max-width:640px){
  .form-row,.form-row.cols-3,.form-row.cols-4{grid-template-columns:1fr;gap:20px}
  .card{padding:28px 0}
  .result-panel{padding:28px 20px;margin:28px 0}
  .result-panel::before{left:20px}
  .result-value{font-size:26px}
  .result-value.primary{font-size:34px}
  .cta-section{padding:28px 0 0;margin:40px 0 0}
  .cta-section h3{font-size:22px}
  .site-nav a{margin-left:14px;font-size:10px;letter-spacing:.1em}
  .site-logo{font-size:18px}
  .page-header{padding:40px 0 28px;margin-bottom:28px}
}