:root{--green:#28533c;--green-dark:#183b29;--red:#b52332;--paper:#fff;--soft:#f4f4f5;--line:#dedee0;--ink:#1f2923;--muted:#626a65}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.55}
a{color:inherit}
a:focus-visible,button:focus-visible{outline:3px solid var(--red);outline-offset:4px}
.site-header{min-height:92px;padding:16px max(22px,calc((100vw - 1080px)/2));display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--green)}
.brand img{display:block;width:56px;height:56px;object-fit:contain}
.brand span{display:flex;flex-direction:column}
.brand strong{font-size:22px;line-height:1.15}
.brand small{margin-top:4px;font-size:13px;color:var(--muted)}
.back-link{font-size:14px;font-weight:700;color:var(--green);text-underline-offset:4px}
main{width:min(1080px,calc(100% - 44px));margin:0 auto}
.intro{padding:70px 0 38px;text-align:center}
.eyebrow{margin:0 0 12px;color:var(--red);font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}
h1{max-width:850px;margin:0 auto;color:var(--green);font-size:clamp(38px,6vw,72px);line-height:1.02;letter-spacing:-.045em}
.lead{max-width:760px;margin:25px auto 0;font-size:18px;color:var(--muted)}
.checker{border:1px solid var(--line);background:var(--paper);box-shadow:0 18px 55px rgba(24,59,41,.09)}
.tabs{display:grid;grid-template-columns:repeat(3,1fr);background:var(--soft);border-bottom:1px solid var(--line)}
.tabs button{min-height:62px;padding:12px 16px;border:0;border-right:1px solid var(--line);background:transparent;color:var(--green);font-size:15px;font-weight:700;cursor:pointer}
.tabs button:last-child{border-right:0}
.tabs button[aria-selected=true]{background:var(--green);color:#fff}
.frame-wrap{padding:22px;background:#fff}
iframe{display:block;width:100%;height:560px;border:0;background:#fff}
.save-status{margin:0;padding:14px 24px;border-top:1px solid var(--line);background:#fbfbfb;color:var(--muted);font-size:13px;text-align:center}
.save-status[data-state=saved]{color:var(--green);font-weight:700}
.save-status[data-state=error]{color:#7c4d00}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:58px 0 24px}
.help-grid article{padding:30px;border-top:4px solid var(--green);background:var(--soft)}
.help-grid h2,.contact-card h2{margin:0;color:var(--green);font-size:24px;letter-spacing:-.025em}
.help-grid p{margin:13px 0 0;color:var(--muted)}
.credit{margin:24px 0 58px;padding:22px 26px;border-left:4px solid var(--red);background:#fff7f7;color:var(--muted);font-size:14px}
.credit p{margin:0}.credit a{color:var(--red);font-weight:700}
.contact-card{margin-bottom:64px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:30px;background:var(--green-dark);color:#fff}
.contact-card h2{color:#fff}.contact-card .eyebrow{color:#ffb7bd}
.contact-card a{min-height:50px;padding:0 20px;display:flex;align-items:center;background:#fff;color:var(--green);font-weight:800;text-decoration:none;white-space:nowrap}
footer{padding:28px 22px;text-align:center;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:720px){.site-header{min-height:78px;padding:12px 18px}.brand img{width:44px;height:44px}.brand strong{font-size:18px}.brand small{display:none}.back-link{font-size:13px}main{width:min(100% - 28px,1080px)}.intro{padding:46px 0 28px}h1{font-size:clamp(35px,11vw,54px)}.lead{font-size:16px}.tabs{grid-template-columns:1fr}.tabs button{min-height:50px;border-right:0;border-bottom:1px solid var(--line)}.tabs button:last-child{border-bottom:0}.frame-wrap{padding:8px}iframe{height:600px}.help-grid{grid-template-columns:1fr;gap:14px;padding-top:38px}.help-grid article{padding:23px}.contact-card{padding:28px 24px;align-items:stretch;flex-direction:column}.contact-card a{justify-content:center;white-space:normal;text-align:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}