/* corivel.online — self-contained stylesheet, system fonts only, no external resources. */
:root{--bg:#fcfcfc;--ink:#1a1a1a;--brand:#111;--muted:#6b6b6b;--line:#dcdcdc;--soft:#ebebeb;--surface:#f3f3f3;
--green:#00a979;--green-d:#008357;--green-l:#e6f6f0;--red:#d7153a;
--font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--font)}
a{color:var(--brand);text-underline-offset:2px}
a:hover{color:var(--green-d)}
img{max-width:100%;height:auto;display:block}
.topbar{background:var(--brand);color:#fff;font-size:14px;line-height:1.45;padding:9px 16px;text-align:center}
.topbar a{color:#fff;font-weight:600}
.site-head{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;max-width:1280px;margin:0 auto;padding:16px;border-bottom:1px solid var(--line)}
.brand{font-weight:800;font-size:22px;text-decoration:none;letter-spacing:-.02em}
.brand span{color:var(--green)}
.site-nav{display:flex;flex-wrap:wrap;gap:4px 18px;font-size:15px}
.site-nav a{text-decoration:none;color:var(--muted)}
.site-nav a[aria-current=page],.site-nav a:hover{color:var(--brand);text-decoration:underline}
.wrap{max-width:1280px;margin:0 auto;padding:24px 16px 48px}
.wrap-single .main{max-width:760px;margin:0 auto}
.wrap-three{display:grid;grid-template-columns:220px minmax(0,1fr) 260px;gap:40px;align-items:start}
.rail-box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:20px;font-size:15px}
.rail-l .sticky{position:sticky;top:16px}
.rail-h{font-size:15px;margin:0 0 10px;text-transform:uppercase;letter-spacing:.04em}
.toc{margin:0;padding-left:20px;line-height:1.5}.toc li{margin:4px 0}.toc a{text-decoration:none}
.check{list-style:none;padding:0;margin:0}.check li{padding-left:22px;position:relative;margin:6px 0}
.check li::before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}
.prose h1{font-size:clamp(1.8rem,1.3rem + 2vw,2.6rem);line-height:1.2;letter-spacing:-.02em;margin:.2em 0 .5em}
.prose h2{font-size:clamp(1.35rem,1.2rem + .6vw,1.7rem);line-height:1.3;margin:2em 0 .6em;scroll-margin-top:16px}
.prose h3{font-size:1.15rem;margin:1.6em 0 .4em}
.prose p,.prose ul,.prose ol{margin:0 0 1em}
.prose li{margin:.3em 0}
.kicker{color:var(--green-d);font-weight:700;text-transform:uppercase;letter-spacing:.06em;font-size:13px;margin:0}
.lead{font-size:1.12em;color:#333}
.byline{color:var(--muted);font-size:15px}
.small{font-size:14px;color:var(--muted)}
.disclosure{background:var(--green-l);border-left:4px solid var(--green);border-radius:8px;padding:14px 16px;margin:0 0 16px;font-size:15px;line-height:1.55}
figure{margin:28px 0}
figure img{border:1px solid var(--line);border-radius:10px;width:100%}
figcaption{font-size:14px;color:var(--muted);margin-top:8px}
.table-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:15px}
caption{text-align:left;color:var(--muted);font-size:14px;margin-bottom:8px}
th,td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{width:34%;background:var(--surface)}
.cta{margin:24px 0}
.btn{display:inline-flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;font-weight:700;border-radius:10px;padding:12px 22px;text-align:center;max-width:100%}
.btn .pl{font-size:11px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;opacity:.9}
.btn-solid{background:var(--green);color:#fff;border:2px solid var(--green-d)}
.btn-solid:hover{background:var(--green-d);color:#fff}
.btn-outline{background:#fff;color:var(--brand);border:2px solid var(--brand)}
.btn-outline:hover{background:var(--surface);color:var(--brand)}
.rail-box .btn{display:flex;width:100%}
.cta-note{font-size:13px;color:var(--muted);margin:8px 0 0!important;line-height:1.45}
.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.pc{border:1px solid var(--line);border-radius:12px;padding:4px 18px;background:#fff}
.pc h3{margin-top:14px}
.pc-pro h3{color:var(--green-d)}.pc-con h3{color:var(--red)}
details{border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:10px 0;background:#fff}
summary{font-weight:700;cursor:pointer}
details p{margin:10px 0 0}
.banner{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 22px 8px;margin-top:40px}
.sources li{word-break:break-word}
.glossary dt{font-weight:700;margin-top:18px}
.glossary dd{margin:4px 0 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 20px 12px}
.card h2{font-size:1.1rem;margin:1em 0 .3em}
address{font-style:normal}
code,kbd{font-family:var(--mono);font-size:.9em;background:var(--soft);padding:1px 5px;border-radius:4px}
.site-foot{border-top:1px solid var(--line);background:var(--surface);padding:32px 16px;font-size:14px;color:var(--muted)}
.site-foot>*{max-width:1280px;margin-left:auto;margin-right:auto}
.foot-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:24px}
.foot-cols h2{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink);margin:0 0 8px}
.foot-cols a{display:block;margin:4px 0;color:var(--ink)}
.site-foot p{margin:8px auto}
.foot-id{color:var(--ink)}
@media (max-width:1100px){.wrap-three{grid-template-columns:minmax(0,1fr) 260px}.rail-l{display:none}}
@media (max-width:820px){.wrap-three{grid-template-columns:minmax(0,1fr);gap:0}.rail-r{margin-top:24px}.pc-grid{grid-template-columns:1fr}.foot-cols{grid-template-columns:1fr 1fr}}
@media (max-width:480px){body{font-size:16px}.foot-cols{grid-template-columns:1fr}th{width:40%}}