:root{--ink:#17263d;--muted:#667085;--paper:#f6f3ec;--card:#fff;--teal:#087d78;--teal-dark:#075e5c;--orange:#e97835;--line:#dedbd2;--danger:#b42318;--danger-bg:#fff1ef;--ok:#067647;--ok-bg:#ecfdf3;--warn:#9a6700;--warn-bg:#fff8e1;--shadow:0 22px 60px rgba(23,38,61,.09)}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}.topbar{height:76px;padding:0 clamp(20px,5vw,72px);display:flex;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--teal);color:#fff;font-weight:900}.brand strong,.brand small{display:block}.brand strong{font-size:15px}.brand small{color:var(--muted);font-size:11px;letter-spacing:.03em}.source-link{color:var(--teal-dark);font-weight:700;text-decoration:none;font-size:14px}.source-link:hover{text-decoration:underline}main{max-width:1180px;margin:auto;padding:72px 24px 56px}.hero{max-width:780px}.eyebrow{margin:0 0 12px;color:var(--orange);font-size:12px;font-weight:850;letter-spacing:.12em;text-transform:uppercase}.hero h1{margin:0;font-family:Georgia,"Times New Roman",serif;font-size:clamp(30px,4vw,48px);line-height:1.08;letter-spacing:-.025em}.intro{max-width:700px;margin:24px 0 18px;color:#526071;font-size:18px}.privacy{display:inline-flex;align-items:center;gap:9px;color:var(--teal-dark);font-size:13px;font-weight:650}.privacy span{font-size:8px}.workspace{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.75fr);gap:22px;margin-top:48px}.calculator,.result{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.calculator{padding:34px}.section-heading{display:flex;gap:15px;align-items:flex-start}.section-heading h2,.result h2,.notice h2{margin:0;font-size:19px}.section-heading p{margin:2px 0 0;color:var(--muted);font-size:13px}.step{flex:0 0 30px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#e8f5f3;color:var(--teal-dark);font-size:13px;font-weight:850}.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0 32px}.case-card{position:relative;cursor:pointer}.case-card input{position:absolute;opacity:0}.case-content{height:100%;display:flex;flex-direction:column;padding:18px;border:1.5px solid var(--line);border-radius:14px;transition:.15s}.case-card input:checked+.case-content{border-color:var(--teal);background:#f2fbfa;box-shadow:inset 0 0 0 1px var(--teal)}.case-card input:focus-visible+.case-content{outline:3px solid rgba(8,125,120,.25);outline-offset:2px}.case-number{color:var(--orange);font-size:11px;font-weight:850;text-transform:uppercase;letter-spacing:.09em}.case-content strong{margin:4px 0;font-size:15px}.case-content small{color:var(--muted);font-size:12px}.dates-heading{padding-top:28px;border-top:1px solid #ece9e2}.date-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}.date-grid label>span{display:block;margin-bottom:7px;font-size:13px;font-weight:750}.date-grid input{width:100%;height:48px;padding:0 13px;border:1px solid #cfcac0;border-radius:10px;background:#fff;color:var(--ink);font:inherit}.date-grid input:focus{outline:3px solid rgba(8,125,120,.16);border-color:var(--teal)}.date-grid small{display:block;margin-top:6px;color:var(--muted);font-size:11px}.form-error{min-height:22px;margin:10px 0 0;color:var(--danger);font-size:13px;font-weight:650}.calculate{width:100%;height:52px;border:0;border-radius:11px;background:var(--teal);color:#fff;font:inherit;font-weight:800;cursor:pointer;box-shadow:0 10px 24px rgba(8,125,120,.2)}.calculate:hover{background:var(--teal-dark)}.calculate span{margin-left:8px}.result{min-height:100%;padding:30px;display:flex}.empty-state{margin:auto;text-align:center;max-width:260px}.result-icon{width:58px;height:58px;margin:0 auto 18px;border-radius:18px;display:grid;place-items:center;background:#f0eee8;color:var(--teal);font-size:28px}.empty-state p{color:var(--muted);font-size:13px}.result:not(.empty){display:block}.result-status{display:inline-flex;padding:6px 10px;border-radius:999px;font-size:11px;font-weight:850;letter-spacing:.05em;text-transform:uppercase}.result.ok .result-status{color:var(--ok);background:var(--ok-bg)}.result.danger .result-status{color:var(--danger);background:var(--danger-bg)}.result.warning .result-status{color:var(--warn);background:var(--warn-bg)}.result-title{margin:18px 0 8px!important;font-family:Georgia,"Times New Roman",serif;font-size:28px!important;line-height:1.15}.result-summary{margin:0 0 24px;color:#526071;font-size:14px}.age-box{padding:18px;border-radius:14px;background:#f5f4f0}.age-box span{display:block;color:var(--muted);font-size:11px;font-weight:750;text-transform:uppercase;letter-spacing:.08em}.age-box strong{display:block;margin-top:5px;font-size:23px}.result-detail{margin:18px 0 0;padding-left:19px;color:#526071;font-size:13px}.result-detail li+li{margin-top:8px}.explain{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;margin:80px 0}.explain h2{max-width:330px;margin:0;font-family:Georgia,"Times New Roman",serif;font-size:35px;line-height:1.15}.rules article{display:grid;grid-template-columns:52px 1fr;gap:18px;padding:24px 0;border-top:1px solid var(--line)}.rules article:last-child{border-bottom:1px solid var(--line)}.rules article>span{color:var(--orange);font-family:Georgia,serif;font-size:30px}.rules h3{margin:0 0 5px;font-size:16px}.rules p{margin:0;color:var(--muted);font-size:14px}.notice{display:grid;grid-template-columns:46px 1fr;gap:18px;padding:24px;border:1px solid #efd3bd;border-radius:16px;background:#fff9f4}.notice-mark{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--orange);color:#fff;font-family:Georgia,serif;font-size:24px;font-style:italic}.notice p{margin:5px 0 0;color:#695747;font-size:14px}footer{max-width:1180px;margin:auto;padding:25px 24px 40px;border-top:1px solid var(--line);display:flex;justify-content:space-between;color:var(--muted);font-size:12px}footer a{color:var(--teal-dark)}
@media(max-width:820px){main{padding-top:45px}.workspace{grid-template-columns:1fr}.result{min-height:310px}.explain{grid-template-columns:1fr;gap:25px}.topbar{height:68px}.source-link{font-size:0}.source-link span{font-size:18px}.hero h1{font-size:32px}}
@media(max-width:560px){main{padding-inline:15px}.calculator{padding:22px}.case-grid,.date-grid{grid-template-columns:1fr}.hero h1{font-size:30px}.intro{font-size:16px}.explain{margin:56px 0}.topbar{padding-inline:16px}footer{display:block;padding-inline:16px}footer a{display:inline-block;margin-top:5px}}
.workspace{margin-top:0}
main{padding-top:16px}

/* Minimal theme */
:root{--paper:#f5f6f7;--card:#fff;--ink:#1f2937;--muted:#6b7280;--line:#d9dde3;--teal:#087d78;--teal-dark:#066763;--shadow:none}
.topbar{height:60px;padding:0 24px;background:#fff}
.brand strong{font-size:15px;font-weight:750}
.source-link{font-size:13px;font-weight:650}
main{max-width:1040px;padding:16px 16px 36px}
.workspace{gap:16px;grid-template-columns:minmax(0,1.45fr) minmax(300px,.75fr)}
.calculator,.result{border-radius:10px;box-shadow:none}
.calculator{padding:24px}
.section-heading{gap:10px}
.section-heading h2,.result h2{font-size:17px}
.step{width:26px;height:26px;flex-basis:26px;border-radius:50%;font-size:12px}
.case-grid{gap:10px;margin:16px 0 24px}
.case-content{padding:14px;border-radius:8px}
.case-card input:checked+.case-content{background:#f3faf9;box-shadow:none}
.dates-heading{padding-top:22px}
.date-grid{gap:12px;margin-top:16px}
.date-grid input{height:44px;border-radius:7px}
.calculate{height:46px;border-radius:7px;box-shadow:none}
.result{padding:24px}
.empty-state{max-width:230px}
.result-title{font-family:inherit;font-size:22px!important}
.age-box{border-radius:8px}
footer{max-width:1040px;padding:18px 16px 28px}
@media(max-width:820px){.topbar{padding:0 16px}.workspace{grid-template-columns:1fr}.result{min-height:240px}}
.tool-links{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.tool-link{min-height:145px;padding:22px 24px;border-radius:10px;color:#fff;text-decoration:none;display:flex;flex-direction:column;align-items:flex-start;transition:transform .15s,filter .15s}
.tool-link:hover{transform:translateY(-2px);filter:brightness(.96)}
.pan-link{background:#075e5c}
.sign-link{background:#263b64}
.tool-label{padding:4px 8px;border-radius:4px;background:rgba(255,255,255,.16);font-size:10px;font-weight:800;letter-spacing:.1em}
.tool-link strong{margin-top:12px;font-size:21px;line-height:1.2}
.tool-link small{margin-top:4px;color:rgba(255,255,255,.78);font-size:12px}
.tool-action{margin-top:auto;padding-top:12px;font-size:13px;font-weight:750}
@media(max-width:620px){.tool-links{grid-template-columns:1fr}.tool-link{min-height:130px}}
@media(max-width:600px){
  body{overflow-x:hidden}
  .topbar{height:54px;padding:0 12px}
  .brand strong{font-size:14px}
  .source-link{font-size:12px}
  main{width:100%;padding:10px 10px 24px}
  .workspace{display:block}
  .calculator{padding:16px;border-radius:8px}
  .result{min-height:180px;margin-top:10px;padding:16px;border-radius:8px}
  .section-heading{gap:8px}
  .section-heading h2,.result h2{font-size:16px}
  .step{width:24px;height:24px;flex-basis:24px}
  .case-grid{grid-template-columns:1fr 1fr;gap:8px;margin:14px 0 20px}
  .case-content{padding:10px}
  .case-content strong{font-size:13px}
  .dates-heading{padding-top:18px}
  .date-grid{grid-template-columns:1fr;gap:12px;margin-top:14px}
  .date-grid input{min-width:0;height:46px;font-size:16px}
  .calculate{height:46px;font-size:15px}
  .result-title{margin-top:12px!important;font-size:19px!important}
  .result-summary{margin-bottom:16px;font-size:13px}
  .age-box{padding:14px}
  .age-box strong{font-size:19px}
  .result-detail{padding-left:17px;font-size:12px}
  .tool-links{gap:10px;margin-top:10px}
  .tool-link{min-height:116px;padding:16px;border-radius:8px}
  .tool-link strong{margin-top:9px;font-size:18px}
  .tool-action{padding-top:8px}
  footer{padding:14px 12px 22px;font-size:11px}
}
.tool-links{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:0}
.tool-link{background:#075e5c}
footer{display:block;max-width:1370px;padding:16px}
.disclaimer{margin:16px 0 0;color:var(--muted);font-size:11px;text-align:center}
.date-grid input::placeholder{color:#8a919d}
.date-grid.date-grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.field-help{margin:10px 0 0;color:var(--muted);font-size:12px}
.sop-warning{margin-top:16px;padding:13px 15px;border:1px solid #efc6bd;border-radius:8px;background:var(--danger-bg);color:#7a271a}
.sop-warning strong{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.05em}
.sop-warning p{margin:4px 0 0;font-size:12px;line-height:1.5}
.age-grid{display:grid;gap:8px}
.age-grid .age-box strong{font-size:19px}
@media(max-width:760px){.tool-links{grid-template-columns:1fr}.tool-link{min-height:112px}}
@media(max-width:760px){.date-grid.date-grid-three{grid-template-columns:1fr}}