:root{--bg-canvas:#fff;--bg-surface:#f1f5f9;--bg-surface-hover:#e2e8f0;--text-primary:#1e293b;--text-muted:#475569;--accent-primary:#047857;--accent-secondary:#d1fae5;--accent-dark:#065f46;--border-subtle:#cbd5e1;--ease-kinetic:cubic-bezier(.16,1,.3,1);--shadow-elevation:0 12px 28px -8px rgba(30,41,59,.28);--glow-accent:0 0 0 2px rgba(4,120,87,.4);--glass-backdrop:blur(14px) saturate(160%);--serif:Georgia,"Times New Roman",serif}
*{box-sizing:border-box}
body{margin:0;font:1rem/1.7 system-ui,sans-serif;color:var(--text-primary);background:var(--bg-canvas);overflow-wrap:anywhere;hyphens:auto}
h1,h2,h3{font-family:var(--serif);line-height:1.2;margin:0 0 .6em;overflow-wrap:anywhere;hyphens:auto}
h1{font-size:clamp(1.7rem,4vw,2.7rem);max-width:26ch}
h2{font-size:clamp(1.4rem,3vw,2rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
a{color:var(--accent-primary)}
img{max-width:100%;height:auto;display:block;object-fit:cover;border-radius:0}
:focus-visible{outline:3px solid var(--text-primary);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.site-head{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--border-subtle)}
.head-top{display:flex;justify-content:space-between;align-items:center;padding-top:14px;padding-bottom:10px}
.brand{display:inline-flex;align-items:center;gap:10px;font:700 1.35rem var(--serif);color:var(--text-primary);text-decoration:none}
.mark{display:grid;place-items:center;width:34px;height:34px;background:var(--accent-primary);color:#fff;font:700 1.1rem var(--serif)}
.menu-btn{display:none;background:var(--accent-primary);color:#fff;border:0;border-radius:999px;width:44px;height:44px;font-size:1.5rem;line-height:1;cursor:pointer}
.nav{background:var(--bg-surface);border-top:1px solid var(--border-subtle)}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:0 30px}
.nav a{display:block;padding:10px 0;color:var(--text-primary);text-decoration:none;font-weight:600;font-size:.95rem;border-bottom:3px solid transparent;transition:color .3s var(--ease-kinetic),border-color .3s var(--ease-kinetic)}
.nav a:hover,.nav a[aria-current=page]{color:var(--accent-primary);border-color:var(--accent-primary)}
.band{background:var(--bg-surface);padding:26px 0 30px;border-bottom:1px solid var(--border-subtle)}
.band .eyebrow{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-primary);font-weight:700;margin:0 0 6px}
.band h1{margin-bottom:16px}
.band.plain h1{margin-bottom:0}
.btn{display:inline-block;background:var(--accent-primary);color:#fff;border:0;border-radius:999px;padding:12px 26px;font:600 1rem system-ui,sans-serif;text-decoration:none;cursor:pointer;transition:transform .45s var(--ease-kinetic),box-shadow .45s var(--ease-kinetic),background .3s}
.btn:hover{background:var(--accent-dark);color:#fff;transform:translateY(-3px) scale(1.03);box-shadow:var(--shadow-elevation),var(--glow-accent)}
.flow{position:relative;max-width:1200px;margin:0 auto;padding:44px 20px 10px 64px}
.flow::before{content:"";position:absolute;left:41px;top:44px;bottom:0;width:2px;background:var(--accent-primary)}
.step{position:relative;padding-bottom:56px}
.num{position:absolute;left:-44px;top:0;width:44px;height:44px;display:grid;place-items:center;background:var(--accent-primary);color:#fff;font:700 1rem var(--serif)}
.step>h2{padding-top:5px;margin-left:0}
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease-kinetic),transform .7s var(--ease-kinetic)}
.js .reveal.reveal-visible{opacity:1;transform:none}
.prose{max-width:70ch}
.tint{background:var(--accent-secondary);padding:20px}
.panel{background:rgba(255,255,255,.62);-webkit-backdrop-filter:var(--glass-backdrop);backdrop-filter:var(--glass-backdrop);border:1px solid rgba(255,255,255,.85);padding:22px;transition:transform .5s var(--ease-kinetic),box-shadow .5s var(--ease-kinetic)}
.panel:hover{transform:translateY(-5px) scale(1.015);box-shadow:var(--shadow-elevation),var(--glow-accent)}
.panel>:last-child{margin-bottom:0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;align-items:center}
.feature{position:relative;background:var(--accent-secondary);padding:14px;margin:0}
.feature img{width:100%;aspect-ratio:4/3;background:#e2e8f0}
.feature figcaption{position:absolute;left:28px;right:28px;bottom:28px;padding:9px 14px;background:rgba(255,255,255,.72);-webkit-backdrop-filter:var(--glass-backdrop);backdrop-filter:var(--glass-backdrop);font-size:.88rem}
.tag{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-primary);font-weight:700;margin:0 0 4px}
.more{font-weight:600}
ul.tick{margin:0 0 1em;padding-left:1.2em}
ul.tick li,ol.list li{margin-bottom:.4em}
.scroll{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;min-width:560px;background:#fff}
.tbl th,.tbl td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border-subtle);vertical-align:top}
.tbl thead th{background:var(--accent-primary);color:#fff;font-family:var(--serif)}
.tbl tbody th{background:var(--bg-surface);width:22%}
.cap{font-size:.88rem;color:var(--text-muted);margin-top:10px}
.eras{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 0 18px;margin:0;list-style:none}
.era{flex:0 0 250px;scroll-snap-align:start;border-top:3px solid var(--accent-primary);padding:18px 18px 0 0;position:relative}
.era::before{content:"";position:absolute;top:-8px;left:0;width:13px;height:13px;background:var(--accent-primary)}
.era b{display:block;font:700 1.15rem var(--serif);margin-bottom:4px}
.era span{font-size:.92rem;color:var(--text-muted);display:block}
.check{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:10px}
.check label{display:flex;gap:12px;align-items:flex-start;cursor:pointer;margin:0;font-weight:400}
.check input{width:20px;height:20px;margin-top:4px;flex:0 0 20px;accent-color:var(--accent-primary)}
.score{font:700 1.1rem var(--serif);color:var(--accent-primary);margin:0}
details.panel{margin-bottom:10px;padding:0}
details.panel summary{cursor:pointer;padding:16px 50px 16px 20px;font-weight:600;list-style:none;position:relative}
details.panel summary::-webkit-details-marker{display:none}
details.panel summary::after{content:"+";position:absolute;right:20px;top:12px;font:400 1.6rem var(--serif);color:var(--accent-primary)}
details[open].panel summary::after{content:"\2212"}
details.panel .ans{padding:0 20px 18px}
.ans p:last-child{margin-bottom:0}
label{display:block;font-weight:600;margin:14px 0 4px}
label:first-child{margin-top:0}
input,select,textarea{width:100%;font:inherit;color:inherit;padding:11px 12px;border:1px solid var(--border-subtle);border-radius:0;background:rgba(255,255,255,.9)}
textarea{min-height:150px;resize:vertical}
pre.preview{white-space:pre-wrap;overflow-wrap:anywhere;font:.93rem/1.6 ui-monospace,Menlo,Consolas,monospace;margin:0}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.status{min-height:1.6em;margin:14px 0 0;font-weight:600;color:var(--accent-dark)}
.meta{font-size:.88rem;color:var(--text-muted)}
.foot{background:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:38px 0 26px;margin-top:30px}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.plist,.llist{list-style:none;margin:0;padding:0}
.plist{counter-reset:f}
.plist li::before{counter-increment:f;content:counter(f,decimal-leading-zero) "  ";font:700 .9rem var(--serif);color:var(--accent-primary)}
.plist li,.llist li{margin-bottom:6px}
.llist{text-align:right}
.foot a{color:var(--accent-primary);font-weight:600}
.foot-base{text-align:center;margin-top:26px;padding-top:18px;border-top:1px solid var(--border-subtle);font-size:.9rem;color:var(--text-muted)}
.foot-base p{margin:0 0 6px}
@media(max-width:1025px){.flow{padding-right:16px}}
@media(max-width:767px){
.menu-btn{display:block}
.nav{display:none;position:absolute;left:0;right:0;top:100%;background:rgba(255,255,255,.92);-webkit-backdrop-filter:var(--glass-backdrop);backdrop-filter:var(--glass-backdrop);border-bottom:1px solid var(--border-subtle);box-shadow:var(--shadow-elevation)}
.nav.open{display:block}
.nav ul{flex-direction:column;padding:6px 0 10px}
.nav a{padding:12px 0;border-bottom:1px solid var(--border-subtle)}
}
@media(max-width:480px){
.flow{padding-left:52px;padding-right:14px}
.flow::before{left:29px}
.num{width:36px;height:36px;left:-40px;font-size:.9rem}
.panel,.tint{padding:14px}
.feature figcaption{left:22px;right:22px;bottom:22px}
.era{flex-basis:220px}
.foot-grid{flex-direction:column}
.llist{text-align:left}
.btn{width:100%;text-align:center}
}
@media(min-width:481px) and (max-width:768px){.flow{padding-left:58px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.js .reveal{opacity:1;transform:none}}