:root{--bg:#f4f7fb;--panel:#fff;--panel-soft:#f8fbff;--ink:#142033;--muted:#647184;--line:#d8e1ee;--blue:#1f6feb;--blue-dark:#1550ad;--green:#0f7b58;--green-bg:#e9f8f1;--amber:#a86400;--amber-bg:#fff7e6;--red:#bd2d2d;--red-bg:#fff0f0;--shadow:0 24px 60px #1420331a}*{box-sizing:border-box}body{background:radial-gradient(circle at top left, #1f6feb1f, transparent 320px), linear-gradient(180deg, #eef5ff 0, var(--bg) 360px);color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit}.text-link{color:var(--blue-dark);margin-top:12px;font-weight:850;display:inline-block}.content-page{border:1px solid var(--line);box-shadow:var(--shadow);background:#fffffff0;border-radius:8px;max-width:860px;margin:0 auto;padding:clamp(24px,4vw,48px)}.content-page h1{margin-bottom:22px}.content-page h2{margin-top:28px;font-size:clamp(24px,3vw,32px)}.content-page p{color:var(--muted);font-size:18px;line-height:1.65}.content-page a{color:var(--blue-dark);overflow-wrap:anywhere;font-weight:800}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.68}main{min-height:100vh;padding:clamp(18px,4vw,48px)}.tool-shell{max-width:1180px;margin:0 auto}.intro{grid-template-columns:minmax(0,1fr) minmax(280px,460px);align-items:end;gap:26px;margin-bottom:24px;display:grid}.eyebrow{color:var(--blue-dark);letter-spacing:0;text-transform:uppercase;margin:0 0 10px;font-size:13px;font-weight:800}h1,h2,h3,h4,p{margin-top:0}h1{letter-spacing:0;max-width:840px;margin-bottom:0;font-size:clamp(38px,6vw,72px);line-height:.98}h2{margin-bottom:12px;font-size:clamp(28px,4vw,42px);line-height:1.05}h3{margin-bottom:14px;font-size:19px}h4{margin-bottom:7px;font-size:17px;line-height:1.25}.intro-copy{color:var(--muted);margin-bottom:0;font-size:18px;line-height:1.55}.check-form,.result-panel,.empty-state{border:1px solid var(--line);box-shadow:var(--shadow);background:#ffffffeb;border-radius:8px}.check-form{padding:clamp(18px,3vw,30px)}.check-form label{color:var(--ink);margin-bottom:10px;font-size:15px;font-weight:800;display:block}.input-row{grid-template-columns:minmax(0,1fr) auto;gap:12px;display:grid}input{color:var(--ink);background:#fbfdff;border:1px solid #c8d5e6;border-radius:8px;outline:none;width:100%;min-height:58px;padding:0 17px}input:focus{border-color:var(--blue);box-shadow:0 0 0 4px #1f6feb24}.input-row button,.check-side button{background:var(--blue);color:#fff;border:0;border-radius:8px;font-weight:800}.input-row button{min-height:58px;padding:0 24px}.input-row button:hover,.check-side button:hover{background:var(--blue-dark)}.form-actions{color:var(--muted);flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px;display:flex}.ghost-button{color:var(--blue-dark);background:#edf4ff;border:1px solid #cfe0f8;border-radius:8px;min-height:38px;padding:0 14px;font-weight:800}.error-box{background:var(--red-bg);color:var(--red);border:1px solid #ffc7c7;border-radius:8px;margin-top:18px;padding:16px 18px;font-weight:800}.result-panel,.empty-state{margin-top:22px;padding:clamp(18px,3vw,30px)}.result-panel.danger{border-top:6px solid var(--red)}.result-panel.warn{border-top:6px solid var(--amber)}.result-panel.good{border-top:6px solid var(--green)}.result-head{grid-template-columns:minmax(0,1fr) minmax(300px,420px);align-items:stretch;gap:20px;display:grid}.result-head p{color:var(--muted);margin-bottom:0;line-height:1.55}.copy-all-button{background:var(--ink);color:#fff;border:0;border-radius:8px;min-height:44px;margin-top:18px;padding:0 16px;font-weight:850}.copy-all-button:hover{background:#26364d}.score-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.score-card{border:1px solid var(--line);border-radius:8px;padding:16px}.score-card span{color:var(--muted);margin-bottom:8px;font-size:13px;font-weight:800;display:block}.score-card strong{font-size:clamp(34px,5vw,48px);line-height:1;display:block}.score-card.critical{background:var(--red-bg);color:var(--red)}.score-card.warning{background:var(--amber-bg);color:var(--amber)}.score-card.passed{background:var(--green-bg);color:var(--green)}.url-strip{background:var(--panel-soft);border:1px solid var(--line);border-radius:8px;gap:8px;margin:24px 0;padding:14px 16px;display:grid}.url-strip span{color:var(--muted);text-transform:uppercase;font-size:13px;font-weight:800}.url-strip strong,code{overflow-wrap:anywhere}.checks{gap:18px;display:grid}.check-group{background:var(--panel-soft);border:1px solid var(--line);border-radius:8px;padding:18px}.check-item{border:1px solid var(--line);background:#fff;border-left-width:5px;border-radius:8px;grid-template-columns:minmax(0,1fr) minmax(170px,230px);align-items:start;gap:14px;margin-top:10px;padding:16px;display:grid}.check-item.critical{border-left-color:var(--red)}.check-item.warning{border-left-color:var(--amber)}.check-item.passed{border-left-color:var(--green)}.check-main{grid-template-columns:94px minmax(0,1fr);gap:12px;display:grid}.status-dot{text-align:center;border-radius:999px;align-self:start;padding:7px 9px;font-size:12px;font-weight:900}.critical .status-dot{background:var(--red-bg);color:var(--red)}.warning .status-dot{background:var(--amber-bg);color:var(--amber)}.passed .status-dot{background:var(--green-bg);color:var(--green)}.check-main p,.check-side small{color:var(--muted);line-height:1.5}code{color:#27364a;background:#eef3f9;border:1px solid #d9e2ee;border-radius:6px;margin-top:10px;padding:9px 10px;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px;line-height:1.45;display:block}.check-side{justify-items:end;gap:12px;display:grid}.check-side button{min-height:40px;padding:0 14px}.empty-state{grid-template-columns:minmax(0,.82fr) minmax(320px,1.18fr);align-items:start;gap:26px;display:grid}.mini-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.mini-grid span{background:var(--panel-soft);border:1px solid var(--line);color:#344258;border-radius:8px;padding:14px;font-weight:750}.sample-panel{border-top:1px solid var(--line);margin-top:22px;padding-top:20px}.sample-list{gap:8px;display:grid}.sample-row{border:1px solid var(--line);background:#fff;border-radius:8px;grid-template-columns:70px minmax(0,1fr) 70px;align-items:center;gap:12px;padding:10px 12px;display:grid}.sample-ok,.sample-bad{text-align:center;border-radius:999px;padding:6px 9px;font-size:12px;font-weight:900}.sample-ok{background:var(--green-bg);color:var(--green)}.sample-bad{background:var(--amber-bg);color:var(--amber)}.sample-row strong{text-align:right}.learning-section{margin-top:42px}.section-heading{max-width:850px}.section-heading p:not(.eyebrow){color:var(--muted);font-size:18px;line-height:1.65}.info-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px;display:grid}.info-grid article{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px}.info-grid h3{margin-bottom:8px}.info-grid p{color:var(--muted);margin-bottom:0;line-height:1.6}.checklist-band{background:var(--panel);border:1px solid var(--line);border-radius:8px;gap:0;margin-top:18px;display:grid}.checklist-band div{gap:6px;padding:18px 20px;display:grid}.checklist-band div+div{border-top:1px solid var(--line)}.checklist-band strong{font-size:17px}.checklist-band span{color:var(--muted);line-height:1.55}.faq-list{gap:12px;margin-top:18px;display:grid}.faq-list article{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:20px}.faq-list h3{margin-bottom:8px}.faq-list p{color:var(--muted);margin-bottom:0;line-height:1.6}.site-footer{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:18px;margin-top:48px;padding:24px 0 4px;display:flex}.site-footer div{gap:5px;display:grid}.site-footer strong{color:var(--ink)}.site-footer nav{flex-wrap:wrap;gap:16px;display:flex}.site-footer a{color:var(--blue-dark);font-weight:800;text-decoration:none}@media (max-width:820px){main{padding:16px}.intro,.result-head,.empty-state,.check-item,.check-main,.input-row,.score-grid,.mini-grid,.info-grid{grid-template-columns:1fr}.check-side{justify-items:start}.sample-row{grid-template-columns:1fr}.sample-row strong{text-align:left}.site-footer{flex-direction:column;align-items:start}}