:root{
  font-family:Inter,"Noto Sans JP",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:#142033;background:#f6f8fc;line-height:1.65;
  -webkit-text-size-adjust:100%;text-size-adjust:100%;
  --ink:#142033;--muted:#64748b;--line:#e4e9f1;--surface:#fff;--blue:#2563eb;--blue-dark:#1d4ed8;--soft:#eef4ff;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:#f6f8fc;padding-bottom:env(safe-area-inset-bottom)}button,select,input{font:inherit}a{color:inherit}.wrap{width:100%;max-width:1100px;margin:auto;padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right))}

.site-header{background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);padding:13px 0}.brand-row{display:flex;align-items:center;justify-content:space-between}.brand-link{display:inline-flex;align-items:center;gap:10px;text-decoration:none;min-height:44px}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--blue);color:#fff;font-size:.9rem;font-weight:900;box-shadow:0 5px 14px rgba(37,99,235,.2)}.brand-name{font-weight:800;letter-spacing:-.02em;font-size:1rem}.nav a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;color:#475569;font-size:.92rem}

.home-hero{background:linear-gradient(180deg,#fff 0%,#f6f8fc 100%);border-bottom:1px solid var(--line)}.home-hero-inner{padding-top:58px;padding-bottom:56px}.hero-kicker,.eyebrow{margin:0 0 12px;color:var(--blue);font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.home-hero h1{max-width:780px;margin:0;color:#0f1b2d;font-size:clamp(2.35rem,11vw,4.7rem);line-height:1.06;letter-spacing:-.055em}.hero-lead{max-width:620px;margin:20px 0 0;color:#56657a;font-size:1.05rem}

.tools-section{padding:38px 0 64px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:16px}.section-heading h2{margin:0;font-size:1.3rem;letter-spacing:-.02em}.tool-grid{display:grid;grid-template-columns:1fr;gap:14px}.home-tool-card{position:relative;display:flex;flex-direction:column;min-height:300px;padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:20px;text-decoration:none;box-shadow:0 1px 2px rgba(15,23,42,.03);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.home-tool-card:active{transform:translateY(1px)}.tool-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.tool-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--soft);color:var(--blue);font-size:.72rem;font-weight:900;letter-spacing:.04em}.tool-category{color:#64748b;font-size:.8rem;font-weight:700}.home-tool-card h3{margin:20px 0 10px;color:#132036;font-size:1.25rem;line-height:1.45;letter-spacing:-.025em}.home-tool-card p{margin:0;color:#66758b;font-size:.94rem}.tool-benefits{display:flex;flex-wrap:wrap;gap:6px;margin:18px 0 22px}.tool-benefits span{padding:5px 8px;border-radius:999px;background:#f4f6f9;color:#56657a;font-size:.72rem;font-weight:700}.tool-cta{margin-top:auto;color:var(--blue);font-weight:800;font-size:.92rem}

.site-footer{border-top:1px solid var(--line);background:#fff}.footer-row{display:flex;flex-direction:column;gap:4px;padding-top:28px;padding-bottom:calc(32px + env(safe-area-inset-bottom));color:#8591a3;font-size:.78rem}

/* tool pages */
.tool-hero{padding:34px 0 18px;background:#fff;border-bottom:1px solid var(--line)}.tool-hero .back{margin:0 0 16px}.tool-hero h1{max-width:850px;margin:7px 0 12px;color:#0f1b2d;font-size:clamp(2rem,8.5vw,3.55rem);line-height:1.12;letter-spacing:-.045em}.lead{max-width:760px;margin:0;color:#5f6f84;font-size:1rem}.tool-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:17px}.tool-tags span{padding:6px 9px;border:1px solid var(--line);border-radius:999px;background:#f8fafc;color:#58677c;font-size:.75rem;font-weight:700}.back{display:inline-flex;align-items:center;min-height:44px;color:#64748b;text-decoration:none;font-size:.88rem}.back:hover{text-decoration:underline}

main.wrap{padding-top:18px;padding-bottom:28px}.card{margin:0 0 14px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 1px 2px rgba(15,23,42,.025)}.card h2{margin:0 0 14px;color:#17243a;font-size:1.15rem;letter-spacing:-.015em}.checker{margin-top:0}.control-grid{display:grid;grid-template-columns:1fr;gap:14px}.control-grid label,label{font-weight:700;font-size:.9rem}select{width:100%;min-height:50px;margin-top:6px;padding:11px 40px 11px 12px;border:1px solid #ccd5e1;border-radius:11px;background:#fff;color:#17243a;font-size:16px}.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:150px;margin:18px 0;padding:24px 16px;border:1.5px dashed #aebbd0;border-radius:16px;background:#f8fbff;cursor:pointer;text-align:center;touch-action:manipulation}.dropzone:active,.dropzone.dragover{border-style:solid;border-color:var(--blue);background:#f0f6ff}.dropzone strong{font-size:1.03rem}.dropzone span{margin-top:5px;font-weight:400;color:#718096;font-size:.86rem}.primary,.secondary{min-height:48px;border:0;border-radius:11px;padding:12px 17px;font-weight:800;cursor:pointer;touch-action:manipulation}.primary{background:var(--blue);color:#fff}.primary:hover{background:var(--blue-dark)}.primary:disabled{opacity:.42}.secondary{background:#eef2f7;color:#334155}.action-button{width:100%}.privacy,.muted,.notice{color:#66758b;font-size:.86rem}.privacy{margin-bottom:0}.file-meta{margin:8px 0}.result-head{display:flex;align-items:stretch;flex-direction:column;gap:12px}.result-head .secondary{width:100%}.summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin:16px 0}.metric{border:1px solid var(--line);border-radius:13px;padding:12px;background:#fafbfd;min-width:0}.metric b,.metric span{display:block}.metric b{font-size:1.2rem;overflow-wrap:anywhere}.metric span{font-size:.76rem;color:#6b7890}.metric.error b{color:#b42318}.metric.ok b{color:#237a45}.notices{display:grid;gap:8px;margin-bottom:16px}.notice{background:#f3f6fa;border-radius:10px;padding:10px 12px}.table-wrap{overflow:visible}table,thead,tbody,tr,th,td{display:block}thead{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}tbody{display:grid;gap:10px}tbody tr{border:1px solid var(--line);border-radius:13px;padding:10px 12px;background:#fff}td{display:grid;grid-template-columns:minmax(72px,32%) minmax(0,1fr);gap:10px;border:0;padding:7px 0;vertical-align:top;overflow-wrap:anywhere}td::before{content:attr(data-label);font-weight:700;color:#758197;font-size:.76rem}.empty-row td{display:block;padding:8px 0}.empty-row td::before{content:none}.value{max-width:none;word-break:break-word}.badge{display:inline-block;width:max-content;border-radius:999px;padding:4px 8px;font-size:.7rem;font-weight:800}.badge.error{background:#fee4e2;color:#912018}.badge.warn{background:#fff2cc;color:#7a5c00}.badge.info{background:#eaf0f7;color:#43536b}.feature-list{padding-left:1.2em}.feature-list li+li{margin-top:7px}.faq details{border-top:1px solid var(--line);padding:0}.faq summary{display:flex;align-items:center;min-height:52px;font-weight:700;cursor:pointer;padding:10px 0;touch-action:manipulation}.faq details p{margin-top:0}.sources a{word-break:break-word;color:#315ca8}.footer{padding-top:24px;padding-bottom:calc(38px + env(safe-area-inset-bottom));color:#7c899d;font-size:.8rem}

@media(min-width:700px){.wrap{padding-left:24px;padding-right:24px}.site-header{padding:15px 0}.home-hero-inner{padding-top:86px;padding-bottom:80px}.hero-lead{font-size:1.12rem}.tools-section{padding:54px 0 86px}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.home-tool-card{min-height:330px;padding:28px}.home-tool-card:hover{transform:translateY(-3px);border-color:#ced8e8;box-shadow:0 14px 35px rgba(15,23,42,.08)}.footer-row{flex-direction:row;justify-content:space-between}.tool-hero{padding:50px 0 28px}.lead{font-size:1.08rem}main.wrap{padding-top:24px}.card{padding:24px;margin-bottom:16px}.control-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.dropzone{min-height:170px}.action-button{width:auto}.result-head{align-items:center;justify-content:space-between;flex-direction:row}.result-head .secondary{width:auto}.summary-grid{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin:18px 0}.table-wrap{overflow:auto;-webkit-overflow-scrolling:touch}table{display:table;width:100%;border-collapse:collapse;font-size:.88rem}thead{display:table-header-group;position:static;width:auto;height:auto;padding:0;margin:0;overflow:visible;clip:auto;white-space:normal}tbody{display:table-row-group}tr{display:table-row}tbody tr{border:0;border-radius:0;padding:0;background:transparent}th,td{display:table-cell;text-align:left;border-bottom:1px solid var(--line);padding:10px 8px;vertical-align:top}td::before{content:none}.value{max-width:280px}.footer{padding-left:24px;padding-right:24px}}
@media(min-width:900px){.control-grid{grid-template-columns:1fr 1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{scroll-behavior:auto!important;transition:none!important}}