/* RUDO(TM) Learning Hub · shared components (extends /assets/rudo.css; tokens only). Page overflow is not hidden, so real overflow stays visible to tests. */
.skip{position:absolute;left:12px;top:-80px;background:var(--ink);color:var(--paper);padding:10px 14px;border-radius:var(--radius-sm);z-index:50;text-decoration:none}
.skip:focus{top:10px;color:var(--paper)}
main,main.wrap{display:block;padding-top:32px;padding-bottom:8px}
@media(min-width:760px){main,main.wrap{padding-top:48px}}
section{margin:0 0 56px}
@media(min-width:760px){section{margin-bottom:72px}}
.eyebrow{font:600 12.5px/1.5 var(--font-body);letter-spacing:.09em;text-transform:uppercase;color:var(--primary);margin:0 0 6px}
:lang(zh-CN) .eyebrow{letter-spacing:.04em;font-size:13px}
.lead{font-size:1.125rem;line-height:1.65;color:var(--muted);max-width:60ch}
.prose{max-width:72ch;line-height:1.72}
.prose h2{margin-top:1.4em}.prose h3{margin-top:1.2em}
.prose li{margin:.25em 0}
.stack>*+*{margin-top:12px}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.spread{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline;justify-content:space-between}
.hidden{display:none!important}
.hash,.break{word-break:break-all;overflow-wrap:anywhere}
.hash{font:13px/1.5 var(--font-mono)}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--card)}
.table-wrap table{min-width:520px}
.table-wrap td,.table-wrap th{vertical-align:top}
td.num,th.num{text-align:right}
hr.rule{border:0;border-top:1px solid var(--line);margin:28px 0}
.gold-rule{display:block;width:48px;height:3px;background:var(--accent);border-radius:2px;margin:12px 0 16px}

/* hero */
.hero{padding:8px 0 0}
.hero h1{max-width:16ch;margin-bottom:.35em}
.hero-grid{display:grid;gap:28px}
.hero-grid>*{min-width:0}
@media(min-width:960px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 12px}
/* On phones the main action sits after the target and deadline, inside the round card. */
@media(max-width:959px){#hero-cta{display:none}}

/* round card */
.round-card .target{font:400 clamp(1.875rem,4vw,2.5rem)/1.15 var(--font-display);margin:2px 0 8px}
.card-art{display:block;width:100%;height:auto;aspect-ratio:16/5;object-fit:cover}
.card.has-art{padding:0;overflow:hidden}
.card.has-art>.card-body{padding:20px}
@media(min-width:760px){.card.has-art>.card-body{padding:24px}}
.facts{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.875rem;color:var(--muted);padding:10px 0;margin:12px 0;border-block:1px solid var(--line)}
.times{display:grid;gap:4px;margin:8px 0;font-size:.9375rem;line-height:1.5;font-variant-numeric:tabular-nums}
.times span.k{display:block;color:var(--muted);font-size:.8125rem}
@media(min-width:480px){.times span.k{display:inline-block;min-width:10.5em;font-size:.875rem}}
.count{font:600 1.375rem/1.3 var(--font-body);font-variant-numeric:tabular-nums}

/* stats */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:760px){.stats{grid-template-columns:repeat(5,1fr)}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px}
.stat b{display:block;font:600 1.5rem/1.3 var(--font-body);font-variant-numeric:tabular-nums}
.stat span{font-size:.85rem;color:var(--slate)}

/* steps */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:12px;counter-reset:s}
@media(min-width:760px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps li{counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--primary-tint);color:var(--primary);font:600 14px var(--font-body);margin-bottom:10px}
.steps h3{font-size:1.0625rem}
.steps.three{grid-template-columns:1fr}
@media(min-width:760px){.steps.three{grid-template-columns:repeat(3,1fr)}}

/* notices */
.note{background:var(--warn-tint);color:var(--warn-ink);padding:12px 16px;border-radius:var(--radius-sm)}
.note a{color:inherit}
.msg{min-height:1.2em;font-size:.95rem}
.msg.err{color:var(--err-ink);background:var(--err-tint);font-weight:600;padding:8px 12px;border-radius:8px}
.msg.ok{color:var(--primary);background:var(--primary-tint);font-weight:600;padding:8px 12px;border-radius:8px}
.unavailable{color:var(--muted)}

/* forms */
.field{display:grid;gap:6px;margin:0 0 14px}
.field>label,.field>.label{font-weight:600}
.field .help{font-size:.85rem;color:var(--slate)}
.check{display:flex;gap:10px;align-items:flex-start;margin:0 0 10px}
.check input{margin-top:.25em;width:20px;height:20px;flex:0 0 auto;accent-color:var(--primary)}
fieldset{border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 16px;margin:0 0 14px;min-width:0}
legend{font-weight:600;padding:0 4px}
input[type=text],input[type=number],input[type=email],select,textarea{width:100%;min-height:44px}
textarea{min-height:120px}
.btn-sm{min-height:40px;padding:.35em .9em;font-size:14px}
.btn-danger,a.btn-danger{border-color:var(--err-ink);color:var(--err-ink)}

/* key box (family key / student pass) */
.keybox{font:600 clamp(1.1rem,5vw,1.75rem)/1.3 var(--font-mono);letter-spacing:.04em;padding:18px;border:2px dashed var(--primary);border-radius:var(--radius);background:var(--primary-tint);text-align:center;word-break:break-all;user-select:all}

/* key-value lists */
dl.kv{display:grid;grid-template-columns:minmax(0,1fr);gap:2px 16px;margin:0}
dl.kv dt{color:var(--slate);font-size:.85rem;margin-top:8px}
dl.kv dd{margin:0;overflow-wrap:anywhere}
@media(min-width:640px){dl.kv{grid-template-columns:minmax(9em,auto) minmax(0,1fr)}dl.kv dt{margin-top:0}}
pre.json{background:var(--paper-cool);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;overflow-x:auto;font:12.5px/1.5 var(--font-mono);max-height:420px;white-space:pre-wrap;word-break:break-all}

/* participants */
.plist{display:grid;gap:12px}
@media(min-width:760px){.plist{grid-template-columns:repeat(2,1fr)}}
.pcard h3{font-family:var(--font-mono);font-size:1.0625rem;margin:0}
.pcard.selected{outline:2px solid var(--primary);outline-offset:-1px;background:var(--primary-tint)}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}
.tabs button{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:.45em 1em;font:600 14px var(--font-body);cursor:pointer;min-height:44px}
.tabs button[aria-selected="true"]{border-color:var(--primary);background:var(--primary-tint);color:var(--primary)}
.roundopt{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;margin:0 0 10px;background:var(--paper-cool);cursor:pointer}
.roundopt input{margin-top:.25em;width:20px;height:20px;accent-color:var(--primary)}
.roundopt:has(input:checked){border-color:var(--primary);background:var(--primary-tint)}
.badge{display:inline-block;background:var(--primary-tint);color:var(--primary);border-radius:999px;padding:.2em .8em;font-weight:600}

/* markdown */
.md table{margin:12px 0}
.md code{background:var(--primary-tint);padding:0 .25em;border-radius:4px;font-size:.9em}
.md h1{font-size:2rem}.md h2{font-size:1.5rem;margin-top:1.6em}.md h3{font-size:1.125rem}

/* misc */
.match{color:var(--primary);font-weight:700}
.mismatch{color:var(--err-ink);font-weight:700}
.toc{display:flex;flex-wrap:wrap;gap:8px 16px;font-weight:600}
details.faq{border-bottom:1px solid var(--line);padding:12px 0}
details.faq summary{cursor:pointer;font-weight:600;font-size:1.0625rem;min-height:32px}
details.faq p{margin:.6em 0 0}
.tier h3{margin-top:0}
.center{text-align:center}

/* page sections */
.section-head{margin-bottom:24px;max-width:68ch}
.section-head p{margin:.2em 0 0;color:var(--muted)}
.strip{display:grid;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.strip>div{padding:20px;min-width:0}
.strip>div+div{border-top:1px solid var(--line)}
.strip h3{margin:0 0 2px;font-size:1rem}
.strip p{margin:0;color:var(--muted);font-size:.875rem}
@media(min-width:760px){.strip{grid-template-columns:repeat(3,1fr)}.strip>div{padding:24px}.strip>div+div{border-top:0;border-left:1px solid var(--line)}}
a.card.link{display:block;color:inherit;text-decoration:none;transition:border-color .12s}
a.card.link:hover{border-color:var(--primary)}
a.card.link h3{color:var(--primary)}
.card h3:first-child{margin-top:0}
.card p:last-child{margin-bottom:0}
.planned{box-shadow:none;background:transparent}
.split{display:grid;gap:20px}
.split>*{min-width:0}
@media(min-width:960px){.split{grid-template-columns:1fr 1fr}}
/* RUDO as a quiet study companion: canonical face files, untouched, no effects */
.guide{display:flex;gap:14px;align-items:center;margin:0}
.guide img{flex:0 0 auto;width:56px;height:56px}
.guide figcaption,.guide .line{font-size:.9375rem;color:var(--ink)}
/* reference-line dot plot */

/* Reference-line dot plot. HTML, so text keeps its true size at every width and in every language. */
.refplot{margin:0;font-variant-numeric:tabular-nums}
.rp-plot{position:relative;padding-top:30px}
.rp-gl{position:absolute;top:30px;bottom:28px;width:1px;background:var(--line)}
.rp-obs{position:absolute;top:30px;bottom:28px;width:2px;margin-left:-1px;background:var(--ink);z-index:1}
.rp-obs-t{position:absolute;top:4px;font-size:.875rem;font-weight:600;color:var(--ink);white-space:nowrap}
.rp-row{position:relative;padding:10px 0 0}
.rp-head{display:flex;justify-content:space-between;gap:12px;font-size:.875rem;position:relative;z-index:2}
.rp-head>span{background:var(--surface);padding:0 6px 0 0}
.rp-head>span+span{padding:0 0 0 6px;font-weight:600;white-space:nowrap}
.rp-track{position:relative;height:24px;margin-top:2px}
.rp-track::before{content:"";position:absolute;left:0;right:0;top:50%;border-top:1px dashed var(--line)}
.rp-dot{position:absolute;top:50%;width:14px;height:14px;margin:-7px 0 0 -7px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 2px var(--surface);z-index:2}
.rp-axis{position:relative;height:28px;font-size:.8125rem;color:var(--muted)}
.rp-axis span{position:absolute;top:8px;transform:translateX(-50%)}
.rp-axis span:first-child{transform:none}
.rp-axis span:last-child{transform:translateX(-100%)}
[data-theme="dark"] .card-art{filter:brightness(.72) saturate(.9)}