/* Live PA pilot: one stylesheet for the main tab and the floating window. Board-first: large type, high contrast. */
:root{
  --ground:#F5F4EF; --card:#FFFFFF; --line:#E3E1D8; --line-strong:#D2CFC4;
  --ink:#1C2230; --muted:#585F6B; --faint:#868B93;
  --accent:#1E5B5E; --accent-soft:#E6EFEE; --accent-ink:#143F41;
  --ok:#2F6B3A; --ok-soft:#E5F0E4; --warn:#8A5300; --warn-soft:#FBF1DC; --warn-ink:#5E3D00;
  --body:'IBM Plex Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
  --display:'Source Serif 4',Georgia,'Times New Roman',serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--body);background:var(--ground);color:var(--ink);font-size:16px;line-height:1.5}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}

/* buttons */
.btn{min-height:44px;padding:0 18px;border-radius:9px;border:1px solid var(--line-strong);background:var(--card);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:8px;justify-content:center}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.dark{background:var(--ink);border-color:var(--ink);color:#fff}
.btn.ghost{background:transparent}
.btn.small{min-height:36px;padding:0 12px;font-size:14px}
.btn:disabled{opacity:.5;cursor:default}
.icon-btn{width:36px;height:36px;border-radius:8px;border:0;background:transparent;color:#3A4150;display:inline-flex;align-items:center;justify-content:center}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

/* main tab layout */
.top{position:sticky;top:0;z-index:5;background:var(--ground);border-bottom:1px solid var(--line)}
.top-in{max-width:1100px;margin:0 auto;padding:12px 16px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:600;font-size:20px;margin-right:auto}
.tabs{display:flex;gap:4px}
.tab{min-height:38px;padding:0 14px;border-radius:999px;border:1px solid transparent;background:transparent;font-weight:600;font-size:14px;color:var(--muted)}
.tab[aria-selected="true"]{background:var(--ink);color:#fff}
.page{max-width:1100px;margin:0 auto;padding:20px 16px 80px;display:flex;flex-direction:column;gap:18px}
h1,h2,h3{font-family:var(--display);font-weight:600;margin:0;text-wrap:balance}
h1{font-size:28px} h2{font-size:21px} h3{font-size:17px;font-family:var(--body)}
p{margin:0;max-width:70ch}
.muted{color:var(--muted)} .small{font-size:13px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;flex-direction:column;gap:12px;min-width:0}
.field{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:600;color:var(--muted)}
.field input{height:42px;border-radius:8px;border:1px solid var(--line-strong);padding:0 12px;background:var(--card);font-size:15px;font-weight:400;color:var(--ink)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.notice{padding:10px 12px;border-radius:9px;background:var(--warn-soft);color:var(--warn-ink);font-size:14px}
.okbox{padding:10px 12px;border-radius:9px;background:var(--accent-soft);color:var(--accent-ink);font-size:14px}

/* plan */
.hinge{border:1px solid var(--line);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:10px;background:#FCFBF8}
.hinge-head{display:grid;grid-template-columns:110px 1fr auto;gap:8px;align-items:end}
.hinge-head input{height:38px;border-radius:8px;border:1px solid var(--line-strong);padding:0 10px;background:var(--card);width:100%}
.items{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.item{display:flex;gap:8px;align-items:center;padding:8px 10px;border-radius:9px;background:var(--card);border:1px solid var(--line)}
.item .txt{flex:1;min-width:0;font-size:14px}
.tag{font-size:11px;font-weight:600;padding:2px 7px;border-radius:6px;background:var(--accent-soft);color:var(--accent-ink);white-space:nowrap}
.tag.re{background:#FBF6E6;color:#5E4700;box-shadow:inset 0 0 0 1.5px #C9A227}
.tag.re.gap{background:#FDF1E4;color:#7A3E00;box-shadow:inset 0 0 0 1.5px #C9A227}
.tag.sep{background:#EFE9F7;color:#4A2E73} .tag.ht{background:#F3ECE0;color:#5E3D00}

/* picker */
.picker{position:fixed;inset:0;z-index:20;background:rgba(20,24,29,.45);display:flex;justify-content:center;align-items:flex-start;padding:24px 12px;overflow:auto}
.picker-in{background:var(--card);border-radius:14px;max-width:820px;width:100%;padding:18px;display:flex;flex-direction:column;gap:12px}
.pick-list{display:flex;flex-direction:column;gap:6px;max-height:60vh;overflow:auto}
.pick{display:flex;gap:10px;align-items:flex-start;padding:10px;border-radius:9px;border:1px solid var(--line);background:#FCFBF8;text-align:left;width:100%}
.pick:hover{border-color:var(--accent)}
.pick .txt{flex:1;font-size:14px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{min-height:34px;padding:0 12px;border-radius:999px;border:1px solid var(--line-strong);background:var(--card);font-size:13px;font-weight:600}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}

/* teach list */
.hl{display:flex;flex-direction:column;gap:8px}
.hl-row{display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:var(--card)}
.hl-row.now{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.hl-row .lab{font-weight:600;min-width:84px}
.hl-row .ttl{flex:1}

/* stage: the class view, full screen on the board */
.stage{position:fixed;inset:0;z-index:30;background:var(--ground);display:flex;flex-direction:column;gap:22px;padding:32px 48px;overflow:auto}
.stage-top{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.steps{display:flex;gap:8px;flex-wrap:wrap;margin-right:auto}
.step{padding:6px 14px;border-radius:999px;background:#EDEBE4;color:#4A515D;font-size:14px}
.step.on{background:var(--ink);color:#fff;font-weight:600}
.step.done{background:var(--accent-soft);color:var(--accent-ink)}
.q{font-family:var(--display);font-weight:600;font-size:clamp(26px,3vw,42px);line-height:1.22;max-width:1300px}
.sub-q{font-size:clamp(18px,1.7vw,24px);color:var(--muted)}
.opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.opt{background:var(--card);border:2px solid var(--line);border-radius:14px;padding:18px 22px;display:flex;align-items:center;gap:18px;font-size:clamp(18px,1.7vw,26px);line-height:1.3;text-align:left;min-height:84px}
.opt:hover{border-color:var(--accent)}
.opt b{width:48px;height:48px;flex-shrink:0;border-radius:24px;background:#EDEBE4;display:flex;align-items:center;justify-content:center;font-size:20px}
.opt.right{border-color:var(--ok);background:var(--ok-soft)}
.opt.wrong{border-color:var(--warn);background:var(--warn-soft)}
.explain{background:var(--card);border-radius:16px;border:1px solid var(--line);padding:26px 30px;font-size:clamp(20px,1.9vw,28px);line-height:1.45;max-width:1300px;display:flex;flex-direction:column;gap:.75em}
.explain p{margin:0;max-width:62ch}
.explain p.cont{margin-top:-.5em;padding-left:1.25em}
.teacher{font-size:16px;padding:12px 14px;border-radius:10px;background:var(--warn-soft);color:var(--warn-ink);max-width:900px}
.teacher.ok{background:var(--ok-soft);color:var(--ok)}
.built{display:flex;flex-direction:column;gap:8px;max-width:1300px}
.built-line{font-size:clamp(18px,1.6vw,24px);padding:10px 16px;border-radius:10px;background:var(--accent-soft);color:var(--accent-ink)}
.built-line .cn{font-weight:700;text-transform:uppercase;letter-spacing:.5px;margin-right:8px;font-size:.8em}
.conn-key{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;max-width:1300px}
.conn-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:17px}
.conn-card b{font-size:20px;display:block}
.stage-foot{margin-top:auto;display:flex;gap:10px;align-items:center;justify-content:flex-end;flex-wrap:wrap}
.split{font-size:14px}

/* floating window (Document Picture-in-Picture) */
.w{display:flex;flex-direction:column;height:100vh;background:var(--card)}
.w-top{height:44px;padding:0 6px 0 14px;background:#F2F1EC;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;flex-shrink:0}
.dot{width:10px;height:10px;border-radius:5px;background:var(--accent);flex-shrink:0}
.w-title{font-size:14px;font-weight:600;flex-grow:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.w-body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:10px;overflow:auto}
.w-nav{display:flex;align-items:center;gap:10px}
.nav-mid{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.nav-btn{width:44px;height:44px;flex-shrink:0;border-radius:10px;border:1px solid var(--line-strong);background:var(--card);color:var(--ink);display:inline-flex;align-items:center;justify-content:center}
.nav-btn svg{width:22px;height:22px}
.nav-btn:disabled{opacity:.35;cursor:default}
.eyebrow{font-size:12px;font-weight:600;letter-spacing:.6px;text-transform:uppercase;color:var(--muted)}
.check{font-size:16px;font-weight:600;line-height:1.35}
.pgrid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}
.pct{height:40px;border-radius:8px;border:1px solid var(--line-strong);background:var(--card);font-size:14px;font-weight:600;font-variant-numeric:tabular-nums}
.pct.hi{background:#F2F7F6;border-color:#C9D9D8}
.pct[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.result{padding:10px 12px;border-radius:10px;font-size:14px;line-height:1.45;display:flex;flex-direction:column;gap:8px}
.result.ok{background:var(--accent-soft);color:var(--accent-ink)}
.result.gap{background:var(--warn-soft);color:var(--warn-ink)}
.bar{all:unset;box-sizing:border-box;width:100%;height:100vh;display:flex;align-items:center;gap:10px;padding:0 6px 0 14px;background:#F2F1EC;cursor:pointer}
.bar:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}
.bar .icon-btn{pointer-events:none}
.dock{position:fixed;right:16px;bottom:16px;width:380px;max-width:calc(100vw - 32px);height:420px;border-radius:12px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.18);border:1px solid var(--line);z-index:25}
.dock.min{height:44px}
@media (min-width:1100px){body.docked .page{padding-right:420px}}
@media (max-width:1099px){body.docked .page{padding-bottom:460px}}
.dock .w,.dock .bar{height:100%}

table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
@media (max-width:760px){.opts{grid-template-columns:1fr}.stage{padding:20px 16px}.grid2{grid-template-columns:1fr}.hinge-head{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}