:root{--ink:#233d38;--muted:#52665f;--paper:#f2f5f1;--card:#fff;--sage:#e4eee6;--orange:#b5401f;--line:#cfdcd2;--line-strong:#a9c0b0;--field-line:#b8cbbd;--focus:#db763b;--err:#933417;--sans:"Avenir Next",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--gut:clamp(14px,3vw,40px)}
*{box-sizing:border-box}
html{scrollbar-gutter:stable}
@media (prefers-reduced-motion:reduce){*{transition:none!important;transform:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--sans)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{opacity:.4;cursor:default}
a{color:inherit}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
/* Keep page navigation immediate: cross-document transitions can abort rapid clicks. */
@view-transition{navigation:none}
.skip{position:absolute;left:12px;top:-60px;background:var(--ink);color:#fff;padding:10px 14px;z-index:9}.skip:focus{top:10px}
.top{max-width:1440px;margin:auto;padding:10px var(--gut);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:6px 20px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:21px;font-weight:800;letter-spacing:-.04em;min-height:44px}
.brand-icon{font:700 24px var(--sans);background:var(--ink);color:#fff;width:38px;height:38px;border-radius:12px 12px 12px 3px;display:grid;place-items:center}
.by{font-size:13px;color:var(--muted);font-weight:500;letter-spacing:0;margin-left:4px}
.modnav{display:flex;gap:4px;flex-wrap:wrap}
.modnav a{padding:8px 12px;border-radius:999px;text-decoration:none;font-weight:700;font-size:15px;min-height:40px;display:inline-flex;align-items:center}
.top .brand{margin-right:auto}
.lang{padding:6px 12px;border:1.5px solid var(--line-strong);border-radius:999px;text-decoration:none;font-size:14px;font-weight:700;min-height:36px;display:inline-flex;align-items:center}
.lang:hover{background:var(--sage)}
:lang(zh-CN) h1,:lang(zh-CN) h2{letter-spacing:0}
.modnav a:hover{background:var(--sage)}.modnav a[aria-current=page]{background:var(--ink);color:#fff}
main{max-width:1384px;margin:auto;padding:0 var(--gut)}
.hero{display:grid;grid-template-columns:1fr 150px;align-items:center;gap:30px;padding:24px 0 18px}
.eyebrow{font-size:13px;letter-spacing:.08em;font-weight:800;color:var(--orange);margin:0 0 6px;text-transform:uppercase}
.hero h1{font-size:clamp(32px,3.6vw,48px);line-height:1.05;letter-spacing:-.04em;margin:0 0 8px;font-weight:800}
.lede{max-width:64ch;font-size:17px;color:var(--muted);margin:0}
.hero-art{width:130px;height:130px;position:relative;background:#dfeadb;border-radius:50%;justify-self:center;transform:rotate(8deg);overflow:hidden}
.sun{position:absolute;width:38px;height:38px;background:#f0aa66;top:12px;right:16px;border-radius:50%}
.stem{position:absolute;left:62px;top:40px;width:3px;height:100px;background:#477567;transform:rotate(10deg)}
.leaf{position:absolute;background:#608b70;border-radius:100% 0 100% 0;width:46px;height:28px;left:22px;top:54px;transform:rotate(30deg)}
.leaf-two{left:64px;top:72px;transform:rotate(-20deg);background:#a7bea1}
.workbench{display:grid;grid-template-columns:360px minmax(0,1fr);gap:28px;align-items:start}
.setup{background:var(--sage);border:1px solid #c6d8cb;border-radius:14px;padding:18px 20px;position:sticky;top:10px;max-height:calc(100vh - 20px);overflow-y:auto;overscroll-behavior:contain}
.setup-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.setup h2{font-size:21px;letter-spacing:-.03em;margin:0}
.small{font-size:14px;color:var(--muted);margin:6px 0 14px;line-height:1.5}
.text-button{border:0;padding:6px 0;color:var(--orange);background:none;white-space:nowrap;font-size:14px;font-weight:800;min-height:40px;text-decoration:underline;text-underline-offset:3px}
.field{display:block;margin:0 0 14px}
.field>span{display:block;font-size:14px;font-weight:700;margin-bottom:5px}
.field input,.field textarea,.add-date input{width:100%;border:1.5px solid #b8cbbd;background:#fff;color:var(--ink);padding:9px 11px;border-radius:8px;min-width:0;outline:0;font-size:16px}
.field input,.add-date input{height:44px}
.field input:focus,.field textarea:focus,.add-date input:focus{border-color:var(--ink);box-shadow:0 0 0 3px #f6c9a4}
.field textarea{resize:vertical;min-height:160px;line-height:1.6}
.field small{display:block;font-size:13px;color:var(--muted);margin-top:5px;line-height:1.5}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
.days{border:0;margin:0 0 14px;padding:0}
.days legend{font-size:14px;font-weight:700;margin-bottom:6px}
.days>div{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px}
.day{position:relative}
.day input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}
.day span{display:grid;place-items:center;width:100%;max-width:40px;aspect-ratio:1;margin:auto;border-radius:50%;font-size:14px;font-weight:700;background:#fff;border:1.5px solid #a9c0b0}
.day input:checked+span{background:var(--ink);border-color:var(--ink);color:#fff}
.day input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}
.blocked{border:0;margin:0 0 14px;padding:0;min-width:0}
.blocked legend{font-size:14px;font-weight:700;margin-bottom:6px}
.blocked .opt{font-weight:500;color:var(--muted);margin-left:4px}
.blocked small{display:block;font-size:13px;color:var(--muted);margin-top:5px;line-height:1.5}
.add-date{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}
.add-date .secondary{min-height:44px}
.chips{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:8px 0 0;padding:0}
.chips li{display:inline-flex;align-items:center;background:#fff;border:1.5px solid #a9c0b0;border-radius:999px;padding:0 0 0 11px;font-size:14px;font-weight:600}
.chips button{border:0;background:none;width:36px;height:36px;border-radius:50%;font-size:19px;line-height:1;color:var(--muted)}
.chips button:hover{background:var(--sage);color:var(--ink)}
.check{display:flex;gap:10px;align-items:center;font-size:15px;font-weight:600;min-height:40px;cursor:pointer}
.check input{accent-color:var(--ink);width:20px;height:20px;margin:0}
.primary{width:100%;background:var(--ink);color:#fff;border:0;border-radius:9px;padding:12px 16px;display:flex;justify-content:space-between;font-size:16px;font-weight:800;min-height:48px;transition:.2s}
.primary:hover{background:#386053}
.privacy{font-size:14px;color:var(--muted);margin:12px 0 8px;line-height:1.5}
.form-message{font-size:14px;color:var(--err);margin:8px 0 0}
.backup{display:flex;gap:6px;flex-wrap:wrap}
.secondary{background:#fff;border:1.5px solid #a9c0b0;color:var(--ink);font-size:14px;font-weight:700;border-radius:8px;padding:8px 12px;white-space:nowrap;min-height:44px;display:inline-flex;align-items:center;justify-content:center;text-align:center}
.secondary:hover{background:#e4eddf}
.file{position:relative;cursor:pointer}.file input{position:absolute;inset:0;opacity:0;margin:0;cursor:pointer}.file:focus-within{outline:3px solid var(--focus)}
.results{min-width:0}
.results-head{display:flex;justify-content:space-between;align-items:center;gap:15px}
.results h2{font-size:30px;line-height:1.2;letter-spacing:-.035em;margin:0}
.sample-label{font-size:13px;font-weight:800;color:var(--orange);padding:3px 10px;border:1.5px dashed var(--orange);white-space:nowrap;border-radius:999px}
.summary{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:16px 0 12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0}
.summary strong{display:block;font-size:32px;line-height:1.1;letter-spacing:-.04em}
.summary span{display:block;font-size:14px;color:var(--muted);margin-top:2px}
.progress{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:6px 18px;margin-bottom:14px}
.pg{display:grid;grid-template-columns:minmax(0,1fr) 80px 40px;gap:8px;align-items:center;font-size:14px}
.pg-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600}
.pg-bar{height:8px;background:#dbe5dd;border-radius:4px;overflow:hidden}.pg-bar i{display:block;height:100%;background:var(--ink)}
.pg-n{font-size:13px;color:var(--muted);text-align:right}
.warning{padding:10px 14px;background:#fff0dd;border:1px solid #e0bf99;border-radius:9px;color:#764323;font-size:15px;margin-bottom:14px}
.schedule-toolbar{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap}
.schedule-toolbar p{font-size:14px;color:var(--muted);margin:0}
.schedule-toolbar>div{display:flex;gap:6px;flex-wrap:wrap}
.schedule{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.wk{grid-column:1/-1;margin:10px 0 0;font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:4px}
.wk:first-child{margin-top:0}
.day-card{background:var(--card);border:1px solid #d3dfd5;border-radius:12px;padding:12px 14px;min-width:0}
.day-card.today{border:2px solid var(--orange)}
.day-card.done{background:#f6f9f5}
.day-top{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:6px;border-bottom:1px solid #e0e6d9}
.day-top strong{font-size:15px}
.tdy{font-style:normal;background:var(--orange);color:#fff;font-size:12px;padding:1px 7px;border-radius:999px;margin-right:4px}
.day-top span{color:var(--muted);font-size:13px}
.session{display:flex;gap:10px;align-items:flex-start;font-size:15px;padding-top:8px;cursor:pointer;min-height:40px}
.session input{accent-color:var(--ink);margin:3px 0 0;width:20px;height:20px;flex:0 0 auto}
.session>span{min-width:0}
.session .topic-name{display:block;font-weight:700;overflow-wrap:anywhere}
.session .meta{display:block;color:var(--muted);font-size:13px;margin-top:1px}
.session input:checked+span .topic-name{text-decoration:line-through;color:#78897b}
.badge{padding:1px 6px;background:#dfece3;color:#2f5340;border-radius:4px;margin-right:6px;font-weight:700}
.badge.review{background:#f9e1cc;color:#7a4a28}
.badge.final{background:#e3e5f5;color:#343a6b}
.backlog{font-size:15px;background:#fff4e7;border:1px solid #e2c7a3;padding:12px;border-radius:10px;margin-top:14px}
.backlog summary{cursor:pointer;font-weight:700;min-height:32px}
.backlog li{margin-top:6px}
.empty{grid-column:1/-1;padding:40px 22px;text-align:center;color:var(--muted);border:1px dashed #b7cbb9;border-radius:12px;font-size:15px}
.how{display:grid;grid-template-columns:1fr 1.4fr;gap:50px;border-top:1px solid var(--line);padding:36px 0 40px;margin-top:40px}
.how h2{font-size:34px;letter-spacing:-.035em;line-height:1.1;margin:0}
.how h3{font-size:17px;margin:0 0 6px}
.how p:not(.eyebrow){font-size:15.5px;color:var(--muted);margin:0 0 18px}
footer{max-width:1384px;margin:auto;padding:16px var(--gut) 28px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:4px 22px;align-items:center;font-size:15px;color:var(--muted)}
footer a{min-height:40px;display:inline-flex;align-items:center}
.doc{max-width:788px;padding:34px var(--gut) 48px;line-height:1.7}
.doc h1{font-size:clamp(28px,4vw,38px);line-height:1.15;letter-spacing:-.03em;margin:0 0 16px}
.doc h2{font-size:19px;margin:26px 0 6px}
.doc p{margin:0 0 12px}
.doc a{color:var(--orange);text-underline-offset:3px}
.doc code{font:14px ui-monospace,Menlo,Consolas,monospace;background:#e3ebe5;padding:1px 5px;border-radius:4px}
.doc .updated{color:var(--muted);font-size:15px}
@media (max-width:1050px){.workbench{grid-template-columns:minmax(0,1fr)}.setup{position:static;max-height:none;overflow:visible}.summary{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.modnav a{font-size:14px;padding:6px 10px}.hero{grid-template-columns:1fr}.hero-art{display:none}.how{grid-template-columns:1fr;gap:16px}.schedule{grid-template-columns:minmax(0,1fr)}.results-head{align-items:flex-start}.by{display:none}.modnav{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;max-width:100%;order:2;flex-basis:100%}.lang{order:1}.modnav a{flex:0 0 auto}}
@media (max-width:360px){.setup{padding:16px 14px}.modnav a{padding:6px 9px}.nav-long{display:none}.brand{font-size:18px}.brand-icon{width:34px;height:34px;font-size:21px}.lang{padding:4px 10px}}
@media print{.top,.hero,.setup,.schedule-toolbar>div,.how,footer,.sample-label,.skip,.progress{display:none!important}body{background:#fff;color:#000}.workbench{display:block}.schedule{grid-template-columns:1fr 1fr}.day-card{break-inside:avoid}}

/* English public-use guidance, below the existing tools. */
.public-guide{margin:40px 0 32px;border-top:1px solid var(--line);padding:32px 0 0;line-height:1.7;max-width:100%}.public-guide h2{font-size:clamp(24px,3vw,30px);line-height:1.25;margin:8px 0 18px;letter-spacing:-.025em}.public-guide h3{font-size:19px;line-height:1.4;margin:24px 0 8px}.public-guide p,.public-guide li{max-width:85ch;font-size:16px}.public-guide ol{padding-left:24px}.public-guide li{margin:10px 0}.public-guide a{color:var(--orange);text-underline-offset:3px}.public-guide code{font:14px ui-monospace,Menlo,monospace;overflow-wrap:anywhere}.public-guide .guide-reviewed{font-size:14px;color:var(--muted);margin-top:28px}@media print{.public-guide{display:none!important}}

/* Capacity and view controls: presentation only, no scheduling changes. */
.capacity-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;background:#fff5ec;border:1px solid #e7c4ad;border-radius:12px;padding:18px;margin:18px 0}.capacity-overview>div{display:grid;gap:3px}.capacity-overview strong{font-size:25px;font-variant-numeric:tabular-nums}.capacity-overview span{font-size:13px}.capacity-overview p{grid-column:1/-1;font-size:13px;color:#694e3e;margin:3px 0 0}.capacity-overview p b{font-size:inherit}.schedule-filter{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:12px 0 20px}.schedule-filter button{background:white;border:1px solid var(--line-strong);padding:9px 13px;border-radius:20px;min-height:42px}.schedule-filter button[aria-pressed=true]{background:var(--ink);color:white}.schedule-filter span{font-size:12px;color:var(--muted);flex-basis:100%}@media(max-width:420px){.capacity-overview{gap:8px;padding:12px}.capacity-overview strong{font-size:22px}.capacity-overview span{font-size:12px}}@media print{.schedule-filter{display:none!important}.capacity-overview{break-inside:avoid}}

/* The navigation stays pinned; its measured height protects content and anchors. */
@media screen {
 :root{--header-height:65px}
 html{scroll-padding-top:calc(var(--header-height) + 16px)}
 body{padding-top:var(--header-height)}
 .top{position:fixed;inset:0 0 auto;z-index:50;max-width:none;background:var(--paper);padding-inline:max(var(--gut),calc((100% - 1360px)/2));box-shadow:0 2px 8px #233d3808}
 .skip{z-index:60}
 .setup{top:calc(var(--header-height) + 12px);max-height:calc(100dvh - var(--header-height) - 24px)}
}
@media screen and (max-width:1100px){.setup{position:static;max-height:none}}
@media screen and (max-width:720px){:root{--header-height:111px}}