:root{--ink:#111827;--muted:#4b5563;--brand:#4338ca;--brand2:#6366f1;--soft:#eef2ff;--line:#e5e7eb;--ok:#047857;--bad:#b91c1c}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
a{color:var(--brand)}a:hover{text-decoration:none}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px 12px;z-index:20}.skip:focus{left:8px}
.wrap{max-width:1100px;margin:auto;padding:0 20px}
.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:12px 20px;flex-wrap:wrap}
.logo{font-weight:900;font-size:24px;letter-spacing:-.03em;color:#111;text-decoration:none;display:flex;align-items:center;gap:8px}
.logo b{color:var(--brand);font-weight:900}.logo .dot{width:22px;height:22px;border-radius:50%;background:conic-gradient(#ef4444,#f59e0b,#eab308,#22c55e,#06b6d4,#6366f1,#a855f7,#ef4444)}
.links{display:flex;gap:16px;flex-wrap:wrap}.links a{text-decoration:none;font-weight:600;color:#312e81}.links a[aria-current]{text-decoration:underline;text-underline-offset:5px}
.menu-btn{display:none;background:#fff;color:var(--ink);border:1px solid var(--line);padding:8px 14px;border-radius:10px;font-weight:700}
.hero{background:linear-gradient(135deg,#eef2ff,#f5f3ff 60%,#fdf2f8);padding:40px 0 34px}
.hero h1{font-size:42px;line-height:1.1;margin:0 0 12px;letter-spacing:-.02em}.hero p{font-size:19px;color:#374151;max-width:780px;margin:0}.hero .meta{font-size:14px;color:var(--muted);margin-top:12px}
.breadcrumbs{font-size:14px;margin:0 0 10px!important}
.section{padding:28px 0}
.content{max-width:860px}.content.wide{max-width:none}.content h2{font-size:19px;line-height:1.3;margin:30px 0 8px}.content h3{font-size:16px;margin:24px 0 8px}
.content.wide>h2,.content.wide>h3,.content.wide>p,.content.wide>ul,.content.wide>ol,.content.wide>.table-scroll,.content.wide>.note{max-width:860px}
.tool{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 18px 45px rgba(67,56,202,.10);margin:0 0 26px}
.tool h2{margin-top:0;font-size:17px}
.cols{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:22px}
label{display:block;font-weight:700;font-size:15px;margin:0 0 12px}
input[type=text],input[type=search],select{display:block;width:100%;border:1px solid #9ca3af;border-radius:12px;padding:11px 12px;font-size:16px;margin-top:6px;font-weight:400;background:#fff;font-family:ui-monospace,Menlo,Consolas,monospace}
input[type=color]{width:64px;height:48px;border:1px solid #9ca3af;border-radius:12px;padding:3px;background:#fff;cursor:pointer;vertical-align:middle}
input[type=range]{width:100%;accent-color:var(--brand)}
.row{display:flex;gap:10px;align-items:flex-end}.row>label{flex:1;margin:0}
button{background:var(--brand);color:#fff;border:0;border-radius:12px;padding:12px 18px;font-weight:700;font-size:15px;cursor:pointer;font-family:inherit}
button.ghost{background:#fff;color:var(--brand);border:1px solid #c7d2fe}button.linkish{background:none;color:var(--brand);padding:0;text-decoration:underline;font-weight:700;font-family:ui-monospace,Menlo,Consolas,monospace}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a5b4fc;outline-offset:2px}
.preview{height:150px;border-radius:16px;border:1px solid var(--line);margin:0 0 14px}
.codes{display:grid;grid-template-columns:auto 1fr auto;gap:8px 12px;align-items:center;margin:8px 0}
.codes dt{font-weight:700;color:var(--muted);font-size:14px}.codes dd{margin:0;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:16px;overflow-wrap:anywhere}
.codes button{padding:6px 12px;font-size:13px}
.msg{min-height:1.4em;color:var(--bad);font-size:14px;margin:4px 0 8px}
.samples{display:grid;grid-template-columns:1fr 1fr;gap:12px}.sample{border-radius:14px;padding:14px;border:1px solid var(--line)}.sample p{margin:0 0 6px}.sample .big{font-size:24px;font-weight:700}
.badges{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 10px;font-size:14px;background:#fff;color:#111;border-radius:10px;padding:8px 10px;margin-top:8px}
.badge{display:inline-block;justify-self:end;white-space:nowrap;line-height:1.6;padding:1px 9px;border-radius:999px;font-weight:700;font-size:13px;color:#fff}.badge.pass{background:var(--ok)}.badge.fail{background:var(--bad)}
.ratio{font-size:40px;font-weight:900;letter-spacing:-.02em;margin:4px 0}
.harm h3{font-size:15px;margin:14px 0 6px}.swatches{display:flex;flex-wrap:wrap;gap:6px}
.sw{min-width:92px;height:56px;border-radius:10px;border:1px solid rgba(0,0,0,.12);padding:0 8px;display:flex;align-items:flex-end;justify-content:flex-start;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;font-weight:600}
.cc-preview{border-radius:16px;padding:20px;border:1px solid var(--line);margin-bottom:14px}.cc-preview .n{font-size:16px;margin:0 0 10px}.cc-preview .l{font-size:24px;font-weight:700;margin:0 0 10px}.cc-preview .ui{display:inline-block;border:3px solid currentColor;border-radius:10px;padding:6px 12px;font-weight:700}
pre.steps{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px;white-space:pre-wrap;font-size:14px;overflow-x:auto}
.note{background:var(--soft);border-left:4px solid var(--brand2);padding:12px 16px;border-radius:0 12px 12px 0;margin:18px 0}
.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;margin:10px 0 18px}th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}th{background:#f8fafc}
td.chip{width:60px}td.chip span{display:block;width:44px;height:26px;border-radius:6px;border:1px solid rgba(0,0,0,.15)}
.mono,code{font-family:ui-monospace,Menlo,Consolas,monospace}code{background:#f3f4f6;padding:1px 5px;border-radius:5px;font-size:.92em}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:10px 0 20px}
.card{display:block;border:1px solid var(--line);border-radius:16px;padding:16px 18px;background:#fff;text-decoration:none;color:var(--ink)}.card:hover{border-color:#a5b4fc}.card h3{margin:0 0 6px;color:#312e81;font-size:18px}.card p{margin:0;color:var(--muted)}
.muted{color:var(--muted)}.small{font-size:14px}
canvas{max-width:100%;border-radius:12px;border:1px solid var(--line);cursor:crosshair;margin-top:10px}
.footer{border-top:1px solid var(--line);padding:30px 0;margin-top:40px;color:#374151;background:#fafafa;font-size:15px}
.foot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.footer h2{font-size:16px;margin:0 0 8px;color:var(--ink)}.footer ul{list-style:none;padding:0;margin:0}.footer li{margin:4px 0}
@media(max-width:860px){.hero h1{font-size:31px}.cols,.foot-grid{grid-template-columns:1fr}.menu-btn{display:block}.links{display:none;width:100%;flex-direction:column;gap:0}.top.open .links{display:flex}.links a{padding:10px 0;border-bottom:1px solid var(--line)}.samples{grid-template-columns:1fr}}
.tool .harm+h2{margin-top:28px}