/* Junior Buyer — Live Industry Lab. Brand tokens match the course hub:
   black ground, distressed off-white, red #E80000 (lifted to #ff4d4d for small text). */
:root{
  --bg:#0a0a0a; --bg-2:#131313; --bg-3:#1b1b1b; --bg-4:#242424;
  --ink:#f4f1ec; --ink-2:#dcd8d1; --muted:#a8a8a8; --line:rgba(244,241,236,.13); --line-2:rgba(244,241,236,.24);
  --red:#e80000; --red-text:#ff4d4d; --red-dark:#b80000;
  --good:#5fd08a; --good-bg:rgba(95,208,138,.10);
  --warn:#f2b84b; --warn-bg:rgba(242,184,75,.10);
  --bad:#ff6b6b; --bad-bg:rgba(255,77,77,.10);
  --display:"Anton","Impact","Arial Narrow Bold",sans-serif;
  --label:"Bebas Neue","Oswald","Arial Narrow",sans-serif;
  --body:"Inter","Helvetica Neue",Arial,sans-serif;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--ink);
  font-family:var(--body);font-size:17px;line-height:1.55;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .035 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  padding-bottom:env(safe-area-inset-bottom,0px);
}
img{max-width:100%;height:auto}
p{margin:0 0 12px}
h1,h2,h3{margin:0;font-weight:400}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:2px}
[tabindex="-1"]:focus{outline:none}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#000;padding:8px 12px;z-index:50}
.skip:focus{left:8px}
.dot{color:var(--red-text);padding:0 .15em}
.muted{color:var(--muted);font-size:14px}
.noscript{padding:24px;text-align:center}

/* ---------- tagline + top bar ---------- */
.tagline{
  display:flex;align-items:center;justify-content:center;gap:14px;
  padding:calc(env(safe-area-inset-top,0px) + 8px) 16px 7px;
  font-family:var(--label);font-size:14px;letter-spacing:.34em;text-transform:uppercase;
  border-bottom:3px solid var(--red);background:#000;white-space:nowrap;overflow:hidden;
}
.tagline::before,.tagline::after{content:"";flex:0 1 56px;height:3px;background:var(--red)}
.tagline b{color:var(--red-text);font-weight:400}
.top{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:16px;
  padding:10px max(16px,env(safe-area-inset-left,0px));background:rgba(10,10,10,.94);
  border-bottom:1px solid var(--line);backdrop-filter:blur(6px);
}
.is-title .top{position:static}
.top__brand{display:flex;align-items:center;gap:10px;font-family:var(--display);text-transform:uppercase;font-size:20px;letter-spacing:.02em;white-space:nowrap}
.top__brand img{display:block}
.stages{display:flex;gap:4px;list-style:none;margin:0 auto;padding:0;flex-wrap:wrap;justify-content:center}
.stages[hidden]{display:none}
.stages li{font-family:var(--label);font-size:15px;letter-spacing:.14em;padding:4px 9px 2px;border-radius:3px;color:#777;border:1px solid transparent}
.stages li.is-done{color:var(--ink-2)}
.stages li.is-now{background:var(--red);color:#fff}
/* the countdown is optional: a button that shows "Show clock" until the student turns it on */
.clock{margin-left:auto;min-height:36px;padding:5px 12px 3px;border-radius:99px;border:1px solid var(--line-2);background:transparent;cursor:pointer;
  font-family:var(--label);font-size:18px;letter-spacing:.1em;color:var(--muted);white-space:nowrap;font-variant-numeric:tabular-nums}
.clock:hover{border-color:var(--ink);color:var(--ink)}
.clock.is-on{color:var(--ink);border-color:var(--ink)}
.clock.is-over{color:var(--red-text);border-color:var(--red)}
.clock[hidden]{display:none}
.stages:not([hidden]) + .clock{margin-left:0}

/* ---------- layout ---------- */
.layout{max-width:1220px;margin:0 auto;padding:0 max(16px,env(safe-area-inset-left,0px));display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:36px;align-items:start}
.is-title .layout,.is-report .layout{grid-template-columns:minmax(0,1fr)}
.is-report .end{max-width:900px}
.stage{padding:28px 0 90px;min-width:0}
.stage:focus{outline:none}
.side{position:sticky;top:64px;max-height:calc(100vh - 76px);overflow:auto;padding:28px 0 24px;scrollbar-width:thin}
.side[hidden]{display:none}

/* ---------- title ---------- */
.title{max-width:760px;margin:0 auto;text-align:center;padding:8px 0 30px}
.title__logo{display:block;width:min(420px,80vw);margin:0 auto 4px}
.title__logo img{display:block;width:100%}
.kicker{font-family:var(--label);font-size:20px;letter-spacing:.22em;color:var(--red-text);margin:0 0 4px}
.title__h{font-family:var(--display);text-transform:uppercase;font-size:clamp(44px,11vw,96px);line-height:.94;letter-spacing:.01em;margin:0 0 12px}
.title__pre{display:block;font-size:.46em;letter-spacing:.06em;color:var(--red-text);margin-bottom:.12em}
.title__sub{font-family:var(--label);font-size:clamp(22px,5.4vw,30px);letter-spacing:.12em;margin:0 0 16px}
.lede{max-width:36em;margin:0 auto 18px;font-size:clamp(17px,4.4vw,19px);color:var(--ink-2)}
.title__facts{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0 0 26px}
.title__facts li{border:1px solid var(--line-2);border-radius:3px;padding:6px 12px;font-size:15px;color:var(--ink-2)}
.title__facts strong{color:var(--ink)}
.resume{background:var(--bg-2);border:1px solid var(--line);border-left:5px solid var(--red);border-radius:4px;padding:16px;margin:0 auto 22px;max-width:560px;text-align:left}
.resume__btns{display:flex;gap:10px;flex-wrap:wrap}
.start{max-width:520px;margin:0 auto 26px;text-align:left;background:var(--bg-2);border:1px solid var(--line);border-top:4px solid var(--red);border-radius:4px;padding:18px 18px 20px}
.field{margin-bottom:12px}
.field label{display:block;font-family:var(--label);font-size:18px;letter-spacing:.14em;color:var(--muted);margin-bottom:4px}
.field input{width:100%}
.check{display:flex;gap:10px;align-items:flex-start;font-size:15.5px;margin:4px 0 6px;cursor:pointer}
.check input{width:20px;height:20px;margin:2px 0 0;accent-color:var(--red);flex:none}
.check em{display:block;font-style:normal;color:var(--muted);font-size:13.5px}
.start__msg{background:var(--bad-bg);border-left:4px solid var(--bad);padding:10px 12px;border-radius:3px;font-size:15px}
.btn--wide{width:100%}
.how{max-width:620px;margin:0 auto 18px;text-align:left;color:var(--ink-2);font-size:15.5px;border-top:1px solid var(--line);padding-top:18px}
.instructor{font-family:var(--label);font-size:18px;letter-spacing:.14em;color:var(--muted);margin:10px 0 0}

/* ---------- inputs & buttons ---------- */
input[type="text"],input[type="email"],input[type="password"]{
  min-height:48px;padding:10px 14px;background:var(--bg-3);color:var(--ink);border:1px solid var(--line-2);border-radius:3px;font:inherit;font-size:17px;
}
input::placeholder{color:#777}
input[type="text"]:focus,input[type="email"]:focus,input[type="password"]:focus{outline:2px solid var(--ink);outline-offset:1px;border-color:transparent}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 20px 8px;
  background:var(--red);color:#fff;border:0;border-radius:3px;cursor:pointer;text-decoration:none;
  font-family:var(--label);font-size:21px;letter-spacing:.1em;transition:background-color .15s ease;
}
.btn:hover{background:var(--red-dark)}
.btn:disabled{background:#3a3a3a;color:#8a8a8a;cursor:not-allowed}
.btn--ghost{background:transparent;box-shadow:inset 0 0 0 1.5px var(--line-2)}
.btn--ghost:hover{background:var(--bg-3)}
.btn--sm{min-height:36px;padding:6px 12px 4px;font-size:17px}
.btn--danger{color:var(--red-text)}
.notice-bar{background:var(--bad-bg);border:1px solid rgba(255,107,107,.4);border-radius:4px;padding:10px 14px;margin:0 0 18px;font-size:15px}
.notice-bar--info{background:var(--bg-2);border-color:var(--line-2)}
.notice-bar a{color:var(--ink)}
.answer__err{color:var(--red-text);font-size:14px;min-height:1em;margin:6px 0 0}

/* ---------- chapter banner ---------- */
.chapter{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 14px;border-bottom:3px solid var(--red);padding-bottom:10px;margin:4px 0 26px}
.chapter__n{font-family:var(--label);font-size:22px;letter-spacing:.2em;color:var(--red-text)}
.chapter__t{font-family:var(--display);text-transform:uppercase;font-size:clamp(34px,8vw,54px);line-height:1}
.chapter__s{margin-left:auto;font-family:var(--label);font-size:16px;letter-spacing:.2em;color:var(--muted);border:1px solid var(--line-2);padding:3px 8px 1px;border-radius:3px}

/* ---------- scene ---------- */
.scene{max-width:760px}
.scene__kicker{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;font-family:var(--label);font-size:16px;letter-spacing:.16em;color:var(--muted);margin-bottom:4px}
.tag{color:var(--ink);background:var(--bg-3);border:1px solid var(--line-2);border-left:3px solid var(--red);padding:2px 8px 0;border-radius:2px;letter-spacing:.1em}
.scene__title{font-family:var(--display);text-transform:uppercase;font-size:clamp(32px,7vw,46px);line-height:1.02;letter-spacing:.01em;margin:0 0 18px}
.narr{color:var(--ink-2)}
.say{display:flex;gap:14px;margin:16px 0}
.av{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-family:var(--label);font-size:19px;letter-spacing:.06em;color:#0a0a0a;background:#bbb;padding-top:2px}
.av--renee{background:#ff4d4d}
.av--marcus{background:#f2b84b}
.av--priya{background:#58c7c0}
.av--bev{background:#b99cf0}
.av--carmen{background:#7fd08f}
.av--walt{background:#f0925a}
.av--colt{background:#78a8f5}
.av--ray{background:#c9c4bb}
.say__body{min-width:0;flex:1;background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:10px 14px 2px;position:relative}
.say__body::before{content:"";position:absolute;left:-7px;top:16px;width:12px;height:12px;background:var(--bg-2);border-left:1px solid var(--line);border-bottom:1px solid var(--line);transform:rotate(45deg)}
.say__who{font-weight:600;font-size:15px;margin:0 0 4px}
.say__who span{font-weight:400;color:var(--muted);font-size:13.5px;margin-left:4px}
.say__body p:last-child{font-size:17px}

.email{background:#f4f1ec;color:#161616;border-radius:4px;margin:16px 0;overflow:hidden;box-shadow:0 1px 0 rgba(0,0,0,.4)}
.email__hd{background:#e4dfd6;padding:10px 16px 2px;font-size:14.5px}
.email__hd p{margin:0 0 8px}
.email__hd span{display:inline-block;width:64px;font-family:var(--label);letter-spacing:.14em;color:#6b6358;font-size:15px}
.email__bd{padding:14px 16px 4px;font-size:16px}

.doc{background:var(--bg-2);border:1px solid var(--line);border-top:3px solid var(--ink);border-radius:3px;margin:16px 0;padding:12px 16px 6px}
.doc__title{font-family:var(--label);font-size:18px;letter-spacing:.14em;margin:0 0 6px}
.doc dl{margin:0}
.doc__row{display:grid;grid-template-columns:minmax(120px,38%) 1fr;gap:12px;padding:7px 0;border-top:1px solid var(--line);font-size:15.5px}
.doc__row dt{color:var(--muted)}
.doc__row dd{margin:0}
.doc__row--total{font-weight:700;border-top:2px solid var(--line-2)}
.doc__row--total dt{color:var(--ink)}

.tbl{margin:16px 0;overflow-x:auto;border:1px solid var(--line);border-radius:3px;background:var(--bg-2)}
.tbl table{border-collapse:collapse;width:100%;font-size:15px;font-variant-numeric:tabular-nums}
.tbl caption{caption-side:top;text-align:left;font-family:var(--label);font-size:17px;letter-spacing:.14em;padding:10px 12px 4px}
.tbl th,.tbl td{padding:9px 12px;text-align:left;border-top:1px solid var(--line);vertical-align:top}
.tbl thead th{font-family:var(--label);font-size:15px;letter-spacing:.12em;color:var(--muted);font-weight:400;border-top:0;white-space:nowrap}
.tbl tbody th{font-weight:600}
.tbl__note{font-size:13.5px;color:var(--muted);padding:8px 12px;margin:0;border-top:1px solid var(--line)}

/* ---------- prompts & options ---------- */
.prompt{font-family:var(--label);font-size:23px;letter-spacing:.08em;margin:28px 0 12px;color:var(--ink)}
.prompt__hint{display:block;font-family:var(--body);font-size:14px;letter-spacing:0;color:var(--muted);margin-top:2px}
.opts,.tiles,.cards{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.opt{
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;width:100%;text-align:left;
  background:var(--bg-2);border:1px solid var(--line-2);border-left:5px solid var(--line-2);border-radius:4px;
  padding:14px 16px;cursor:pointer;font-size:16.5px;line-height:1.5;transition:border-color .15s ease,background-color .15s ease,transform .15s ease;
}
.opt:hover:not(:disabled){border-left-color:var(--red);background:var(--bg-3);transform:translateX(2px)}
.opt:disabled{cursor:default}
.opt--picked{border-color:var(--ink);border-left-color:var(--red);background:var(--bg-3)}
.opt--dim{opacity:.55}
.opt--tried{opacity:.45;text-decoration:line-through;text-decoration-color:var(--red)}
.opt__badge{font-family:var(--label);font-size:14px;letter-spacing:.14em;color:#0a0a0a;background:var(--good);padding:2px 7px 0;border-radius:2px;text-decoration:none}
.opt__badge--tried{background:#555;color:var(--ink)}
.opt--dim:has(.opt__badge){opacity:.9}

.tile{
  display:flex;flex-direction:column;gap:3px;width:100%;text-align:left;cursor:pointer;
  background:var(--bg-2);border:1px solid var(--line-2);border-radius:4px;padding:12px 14px 12px 46px;position:relative;font-size:15.5px;
  transition:border-color .15s ease,background-color .15s ease;
}
.tile::before{content:"";position:absolute;left:14px;top:14px;width:20px;height:20px;border:2px solid var(--line-2);border-radius:3px}
.tile:hover:not(:disabled){border-color:var(--ink)}
.tile--on{border-color:var(--red);background:var(--bg-3)}
.tile--on::before{background:var(--red);border-color:var(--red);box-shadow:inset 0 0 0 3px var(--bg-3)}
.tile__title{font-size:16.5px}
.tile:disabled{cursor:default}
.tile--right{border-color:var(--good);background:var(--good-bg)}
.tile--right::before{background:var(--good);border-color:var(--good);box-shadow:inset 0 0 0 3px #10251a}
.tile--wrong{border-color:var(--bad);background:var(--bad-bg)}
.tile--wrong::before{background:var(--bad);border-color:var(--bad);box-shadow:inset 0 0 0 3px #2a1212}
.tile--missed{border-color:var(--warn);border-style:dashed}
.tile--dim{opacity:.5}
.tile__mark{font-family:var(--label);font-size:15px;letter-spacing:.14em;margin-top:2px}
.tile--right .tile__mark{color:var(--good)}
.tile--wrong .tile__mark{color:var(--bad)}
.tile--missed .tile__mark{color:var(--warn)}
.tile__fb{font-size:14.5px;color:var(--ink-2);margin:6px 2px 4px 46px}

.card{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:14px 16px}
.card__ref{display:flex;align-items:center;gap:10px;font-family:var(--label);font-size:18px;letter-spacing:.1em;margin:0 0 6px}
.card__ref span{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--red);color:#fff;font-size:16px;letter-spacing:0;padding-top:2px;flex:none}
.card blockquote{margin:0 0 12px;padding:2px 0 2px 12px;border-left:3px solid var(--line-2);color:var(--ink-2);font-size:15.5px}
.card__opts{display:flex;flex-wrap:wrap;gap:8px}
.card--long .card__opts{flex-direction:column}
.cardopt{
  min-height:44px;padding:9px 14px;border-radius:3px;cursor:pointer;background:var(--bg-3);border:1px solid var(--line-2);text-align:left;font-size:15px;line-height:1.4;
  transition:border-color .15s ease,background-color .15s ease;
}
.card:not(.card--long) .cardopt{font-family:var(--label);font-size:19px;letter-spacing:.12em;padding:8px 18px 6px;min-width:120px;text-align:center}
.cardopt:hover:not(:disabled){border-color:var(--ink)}
.cardopt--on{background:var(--red);border-color:var(--red);color:#fff}
.cardopt:disabled{cursor:default}
.cardopt--right{background:var(--good-bg);border-color:var(--good);color:var(--ink)}
.cardopt--part{background:var(--warn-bg);border-color:var(--warn)}
.cardopt--wrong{background:var(--bad-bg);border-color:var(--bad)}
.cardopt--best{border-color:var(--good);border-style:dashed}
.cardopt--dim{opacity:.45}
.cardfb{margin-top:12px;padding:10px 12px 2px;border-radius:3px;border-left:4px solid var(--muted);background:var(--bg-3);font-size:15px}
.cardfb--best{border-left-color:var(--good)}
.cardfb--ok{border-left-color:var(--warn)}
.cardfb--bad{border-left-color:var(--bad)}
.cardfb__head{margin:0 0 4px;font-size:14px;color:var(--muted)}
.cardfb__head strong{font-family:var(--label);font-size:17px;letter-spacing:.12em;color:var(--ink);font-weight:400}
.cardfb__best{margin-left:8px;color:var(--good)}

.actions{display:flex;align-items:center;justify-content:flex-end;gap:14px;margin:18px 0 0;flex-wrap:wrap}
.actions--story{justify-content:flex-start;margin-top:26px}
.actions--end{justify-content:flex-start;margin-top:26px}
.count{font-size:14px;color:var(--muted)}

.picked{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:10px 14px;margin:0 0 12px;font-size:15.5px}
.picked span{display:block;font-family:var(--label);font-size:15px;letter-spacing:.14em;color:var(--muted)}

/* ---------- feedback ---------- */
.fb{margin:20px 0 0;padding:16px 18px 18px;border-radius:4px;border:1px solid var(--line-2);border-left:6px solid var(--muted);background:var(--bg-2);animation:rise .25s ease-out}
.fb--best{border-left-color:var(--good);background:linear-gradient(90deg,var(--good-bg),var(--bg-2) 60%)}
.fb--ok{border-left-color:var(--warn);background:linear-gradient(90deg,var(--warn-bg),var(--bg-2) 60%)}
.fb--bad{border-left-color:var(--bad);background:linear-gradient(90deg,var(--bad-bg),var(--bg-2) 60%)}
.fb__head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.fb__grade{font-family:var(--display);text-transform:uppercase;font-size:26px;letter-spacing:.02em}
.fb--best .fb__grade{color:var(--good)}
.fb--ok .fb__grade{color:var(--warn)}
.fb--bad .fb__grade{color:var(--bad)}
.fb__pts{font-family:var(--label);font-size:18px;letter-spacing:.12em;color:var(--muted)}
.fb__after{color:var(--ink);font-style:italic;border-top:1px solid var(--line);padding-top:10px}
.fb--hint{margin-bottom:6px}
.why{margin:4px 0 12px;font-size:15px}
.why summary{cursor:pointer;color:var(--good);font-weight:600}
.why p{margin:8px 0 0;color:var(--ink-2)}
.work{margin:4px 0 12px}
.work > span{display:block;font-family:var(--label);font-size:15px;letter-spacing:.14em;color:var(--muted);margin-bottom:4px}

/* ---------- math, laid out the traditional way ---------- */
.stacks{display:flex;flex-wrap:wrap;gap:12px;margin:6px 0 12px}
.st{margin:6px 0 12px;background:#f4f1ec;color:#141414;border-radius:3px;padding:10px 16px 12px;display:inline-block;max-width:100%;overflow-x:auto;
  background-image:repeating-linear-gradient(transparent 0 27px,rgba(20,20,20,.06) 27px 28px)}
.stacks .st{margin:0}
.st figcaption{font-family:var(--label);font-size:16px;letter-spacing:.14em;color:#6b6358;margin-bottom:4px}
.st table{border-collapse:collapse;font-family:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;font-size:15.5px;font-variant-numeric:tabular-nums}
.st td{padding:3px 0;line-height:1.4;vertical-align:baseline}
.st__op{width:1.6em;text-align:center;font-weight:700;color:#b80000}
.st__int{text-align:right;padding-left:6px !important;white-space:nowrap}
.st__dec{text-align:left;white-space:nowrap;padding-right:14px !important;min-width:2.2em}
.st__lbl{font-family:var(--body);font-size:13.5px;color:#5c574f;white-space:nowrap}
.st tr.is-res .st__op,.st tr.is-res .st__int,.st tr.is-res .st__dec{border-top:2px solid #141414}
.st tr.is-final .st__op,.st tr.is-final .st__int,.st tr.is-final .st__dec{border-top:4px double #141414}
.st tr.is-final td{font-weight:700;padding-top:4px}
.st tr.is-final .st__lbl{color:#141414}
.st tr.is-round td{font-weight:700;color:#b80000}
.st tr.is-round .st__lbl{color:#b80000;font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:4px 0 14px}
.chip{font-size:13px;font-weight:600;padding:3px 9px;border-radius:99px;border:1px solid}
.chip--up{color:var(--good);border-color:rgba(95,208,138,.4)}
.chip--down{color:var(--bad);border-color:rgba(255,107,107,.4)}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- calc answers & calculator ---------- */
.answer{margin:0 0 6px}
.answer__row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.answer__row input{flex:0 1 220px;font-size:20px;font-variant-numeric:tabular-nums}
.answer__unit{font-family:var(--label);font-size:22px;letter-spacing:.08em;color:var(--muted)}
.calc{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:12px}
.calc--inline{margin-top:18px;max-width:340px}
.calc__label{display:block;font-family:var(--label);font-size:16px;letter-spacing:.16em;color:var(--muted);margin-bottom:6px}
.calc__in{width:100%;font-variant-numeric:tabular-nums}
.calc__out{display:block;font-family:var(--label);font-size:26px;letter-spacing:.04em;min-height:34px;margin:6px 2px 8px;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.calc__keys{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.calc__keys button{min-height:42px;border-radius:3px;border:1px solid var(--line);background:var(--bg-3);cursor:pointer;font-family:var(--label);font-size:21px;padding-top:3px}
.calc__keys button:hover{background:var(--bg-4)}
.calc__keys [data-key="="]{background:var(--red);border-color:var(--red);color:#fff}
.calc__keys [data-key="C"]{color:var(--red-text)}
.calc__use{margin-top:8px;width:100%;min-height:40px;border-radius:3px;border:1px dashed var(--line-2);background:transparent;cursor:pointer;font-size:14.5px;color:var(--ink-2)}
.calc__use:hover{border-color:var(--ink);color:var(--ink)}

/* ---------- sidebar ---------- */
.side__inner{display:flex;flex-direction:column;gap:14px}
.side__close{display:none}
.panel{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:12px 14px}
.panel h2{font-family:var(--label);font-size:18px;letter-spacing:.18em;color:var(--red-text);margin:0 0 8px}
.desk{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.desk p{margin:0;display:flex;flex-direction:column}
.desk span:last-child{font-size:12.5px;color:var(--muted)}
.desk__big{font-family:var(--display);font-size:30px;line-height:1.05;font-variant-numeric:tabular-nums}
.memo{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.memo li{border-top:1px solid var(--line);padding-top:8px}
.memo li:first-child{border-top:0;padding-top:0}
.memo__city{margin:0;font-weight:600;font-size:15px}
.memo__city span{display:block;font-weight:400;color:var(--muted);font-size:12.5px}
.memo__deal{margin:2px 0 0;font-size:13.5px;color:var(--ink)}
.memo__deal.is-pending{color:var(--muted);font-style:italic}
.rels{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.rel__lbl{display:flex;justify-content:space-between;font-size:13.5px}
.rel__lbl em{font-style:normal;color:var(--muted);font-size:12px;margin-left:4px}
.rel__lbl span:last-child{font-family:var(--label);letter-spacing:.1em;font-size:15px;color:var(--ink-2)}
.rel__track,.bar__track{height:6px;border-radius:3px;background:var(--bg-4);overflow:hidden;margin-top:3px}
.rel__fill,.bar__fill{height:100%;width:0;background:var(--muted);border-radius:3px;transition:width .4s ease}
.rel__fill--up{background:var(--good)}
.rel__fill--mid{background:var(--warn)}
.rel__fill--down{background:var(--bad)}
.file{font-size:13.5px}
.file__g{font-family:var(--label);font-size:15px;letter-spacing:.14em;color:var(--muted);margin:8px 0 2px}
.file__g:first-child{margin-top:0}
.file ul{margin:0 0 4px;padding-left:16px}
.file li{margin:2px 0}
.file-btn{display:none}

/* ---------- ending ---------- */
.end{max-width:860px}
.cities{list-style:none;margin:20px 0;padding:0;display:flex;flex-direction:column;gap:16px}
.city{background:var(--bg-2);border:1px solid var(--line);border-top:4px solid var(--red);border-radius:4px;padding:14px 16px 12px}
.city__hd{display:grid;grid-template-columns:1fr auto;column-gap:14px;align-items:end}
.city__hd h3{font-family:var(--display);text-transform:uppercase;font-size:30px;line-height:1}
.city__hd p{color:var(--muted);font-size:13.5px;margin:4px 0 6px}
.city__hd .city__net{grid-row:1 / span 2;grid-column:2;text-align:right;margin:0;font-family:var(--display);font-size:30px;color:var(--good);line-height:1}
.city__hd .city__net span{display:block;font-family:var(--label);font-size:14px;letter-spacing:.14em;color:var(--muted)}
.city__hd .city__net.is-neg{color:var(--bad)}
.city__math{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start}
.city__math .st{margin:0}
.city__deal{font-size:13.5px;background:var(--bg-3);border-radius:3px;padding:6px 8px;margin:0 0 8px}
.city__cmp{font-size:13.5px;color:var(--ink-2);margin:8px 0 4px;font-style:italic}
.city__notes{margin:6px 0 0;padding-left:18px;font-size:13.5px;color:var(--ink-2)}
.city__notes li{margin:4px 0}
.total{border:1px solid var(--line-2);border-left:6px solid var(--good);border-radius:4px;padding:16px 18px;margin:0 0 30px;background:var(--bg-2)}
.total.is-neg{border-left-color:var(--bad)}
.total__lbl{font-family:var(--label);font-size:18px;letter-spacing:.16em;color:var(--muted);margin:0}
.total__n{font-family:var(--display);font-size:clamp(44px,10vw,64px);line-height:1.05;margin:0 0 6px;color:var(--good)}
.total.is-neg .total__n{color:var(--bad)}
.total__v{margin:0;color:var(--ink-2)}
.h2{font-family:var(--label);font-size:28px;letter-spacing:.14em;display:flex;align-items:center;gap:14px;margin:0 0 12px}
.h2::after{content:"";flex:1;height:3px;background:var(--red)}
.rels-end{list-style:none;margin:0 0 30px;padding:0}
.say--sm{margin:10px 0}
.say--sm .av{width:38px;height:38px;font-size:17px}
.say--sm .say__body p:last-child{font-size:15.5px}
.report{background:var(--bg-2);border:1px solid var(--line-2);border-radius:4px;padding:18px}
.report__hd{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-bottom:3px solid var(--red);padding-bottom:12px;margin-bottom:12px}
.report__name{font-family:var(--display);text-transform:uppercase;font-size:clamp(30px,7vw,42px);line-height:1}
.report__meta{color:var(--muted);font-size:14px;margin:6px 0 0}
.report__score{display:flex;flex-direction:column;align-items:flex-end;font-size:14px;color:var(--muted)}
.report__pct{font-family:var(--display);font-size:56px;line-height:1;color:var(--ink)}
.report__tier{font-size:16px}
.report__tier strong{font-family:var(--label);font-size:21px;letter-spacing:.1em;font-weight:400;color:var(--red-text)}
.bars{list-style:none;margin:14px 0 18px;padding:0;display:flex;flex-direction:column;gap:10px}
.bar__lbl{display:flex;justify-content:space-between;gap:12px;font-size:14px}
.bar__lbl span:last-child{font-variant-numeric:tabular-nums;color:var(--muted);white-space:nowrap}
.bar__track{height:8px}
.bar__fill{background:var(--red)}
.tbl--log table{font-size:13.5px}
.tbl--log td.num{white-space:nowrap;text-align:right}
.log--best td.num{color:var(--good)}
.log--ok td.num{color:var(--warn)}
.log--bad td.num{color:var(--bad)}

/* ---------- mobile ---------- */
@media (max-width:1000px){
  .layout{grid-template-columns:minmax(0,1fr)}
  .side{
    position:fixed;inset:auto 0 0 0;top:auto;z-index:40;max-height:82vh;overflow:auto;
    background:var(--bg);border-top:3px solid var(--red);padding:16px max(16px,env(safe-area-inset-left,0px)) calc(20px + env(safe-area-inset-bottom,0px));
    transform:translateY(100%);transition:transform .25s ease;visibility:hidden;
  }
  .file-open .side{transform:none;visibility:visible;box-shadow:0 -20px 60px rgba(0,0,0,.7)}
  .side__close{display:block;position:sticky;top:0;margin-left:auto;width:44px;height:44px;border-radius:50%;border:1px solid var(--line-2);background:var(--bg-3);font-size:26px;line-height:1;cursor:pointer;z-index:2}
  .file-btn:not([hidden]){
    display:flex;align-items:center;gap:10px;position:fixed;right:14px;bottom:calc(14px + env(safe-area-inset-bottom,0px));z-index:30;
    min-height:48px;padding:10px 16px 8px;border-radius:99px;border:0;background:var(--red);color:#fff;cursor:pointer;
    font-family:var(--label);font-size:19px;letter-spacing:.1em;box-shadow:0 6px 24px rgba(0,0,0,.6);
  }
  .file-btn span{background:rgba(0,0,0,.25);border-radius:99px;padding:2px 9px 0;font-size:16px}
  .stages{display:none}
  .clock{margin-left:auto !important}
  .stage{padding-bottom:110px}
}
@media (max-width:560px){
  body{font-size:16px}
  .tagline{letter-spacing:.22em;font-size:12px;gap:10px}
  .tagline::before,.tagline::after{flex-basis:24px}
  .say{gap:10px}
  .av{width:36px;height:36px;font-size:16px}
  .say__body::before{top:12px}
  .doc__row{grid-template-columns:1fr;gap:0}
  .card:not(.card--long) .cardopt{flex:1 1 auto;min-width:0;padding:8px 10px 6px;font-size:17px}
  .chapter__s{margin-left:0}
  .btn{font-size:19px;letter-spacing:.06em}
  .report__score{align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* ---------- print: the report card ---------- */
@media print{
  @page{margin:14mm}
  body{background:#fff;color:#000;font-size:11pt}
  .tagline,.top,.side,.file-btn,.actions,.skip,.chapter,.notice-bar--info{display:none !important}
  .layout{display:block;padding:0}
  .stage{padding:0}
  .scene__kicker,.scene__title,.narr{color:#000}
  .end{max-width:none}
  .city,.total,.report,.say__body,.tbl{background:#fff !important;border-color:#999 !important;color:#000;break-inside:avoid}
  .city__rows dt,.city__hd p,.report__meta,.report__score,.bar__lbl span:last-child,.say__who span,.total__lbl{color:#444 !important}
  .city__hd .city__net,.total__n,.total.is-neg .total__n{color:#000 !important}
  .st{border:1px solid #999;background-image:none}
  .city__notes,.city__cmp,.total__v,.say__body p{color:#000 !important}
  .av{border:1px solid #666}
  .bar__track{background:#ddd}
  .bar__fill{background:#000 !important;print-color-adjust:exact;-webkit-print-color-adjust:exact}
  .report__tier strong{color:#000}
  .tbl th,.tbl td{border-color:#bbb}
  .log--best td.num,.log--ok td.num,.log--bad td.num{color:#000}
  .h2::after{background:#000}
}

/* ---------- instructor ---------- */
.instr__main{max-width:1180px;margin:0 auto;padding:26px max(16px,env(safe-area-inset-left,0px)) 60px}
.instr .top .btn{margin-left:auto}
.instr__login{max-width:420px}
.instr__login form{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:16px}
.instr__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin-bottom:18px}
.instr__state{font-family:var(--label);font-size:24px;letter-spacing:.1em;color:var(--muted);margin:0 0 10px}
.instr__state.is-open{color:var(--good)}
.instr__pass{display:flex;gap:8px}
.instr__pass input{flex:1;min-width:0}
.instr__links{margin:10px 0 0;display:flex;gap:8px;flex-wrap:wrap}
.instr__tbl td,.instr__tbl th{vertical-align:middle}
.instr__tbl small,.instr__voided small{color:var(--muted);font-weight:400}
.instr__tbl caption small{font-family:var(--body);letter-spacing:0;font-size:12.5px;color:var(--muted)}
.acts{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.pill{display:inline-block;font-size:12px;font-weight:600;padding:2px 8px;border-radius:99px;border:1px solid;margin-top:3px;white-space:nowrap}
.pill--good{color:var(--good);border-color:rgba(95,208,138,.45)}
.pill--warn{color:var(--warn);border-color:rgba(242,184,75,.45)}
.pill--bad{color:var(--bad);border-color:rgba(255,107,107,.45)}
.pill--dim{color:var(--muted);border-color:var(--line-2)}
.instr__voided{margin:16px 0}
.instr__voided summary{cursor:pointer;color:var(--muted)}
.instr__foot{margin-top:16px}

/* ---------- instructor answer sheet ---------- */
.sheet{margin-top:34px}
.sheet__list{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:14px}
.sheet__q{background:var(--bg-2);border:1px solid var(--line);border-left:5px solid var(--muted);border-radius:4px;padding:12px 14px;break-inside:avoid}
.sheet__q--right{border-left-color:var(--good)}
.sheet__q--part{border-left-color:var(--warn)}
.sheet__q--wrong{border-left-color:var(--bad)}
.sheet__hd{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start}
.sheet__n{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--bg-4);font-family:var(--label);font-size:17px;padding-top:2px}
.sheet__title{margin:0;font-weight:600}
.sheet__meta{margin:0;color:var(--muted);font-size:13px}
.sheet__pts{font-family:var(--label);font-size:20px;letter-spacing:.06em;white-space:nowrap}
.sheet__q--right .sheet__pts{color:var(--good)}
.sheet__q--part .sheet__pts{color:var(--warn)}
.sheet__q--wrong .sheet__pts{color:var(--bad)}
.sheet__prompt{margin:8px 0 0;color:var(--ink-2);font-style:italic;font-size:14.5px}
.sheet .tbl{margin:8px 0 0}
.sheet__t td,.sheet__t th{font-size:14px}
.sheet__t td small{display:block;color:var(--muted);font-size:12.5px;margin-top:3px}
.sheet__item{color:var(--ink-2);max-width:260px}
.sheet__mark{text-align:center;font-weight:700;font-size:17px;width:34px}
.sheet__t tr.is-right .sheet__mark{color:var(--good)}
.sheet__t tr.is-part .sheet__mark{color:var(--warn)}
.sheet__t tr.is-wrong .sheet__mark{color:var(--bad)}
.sheet__t tr.is-wrong td:nth-last-child(-n+3){background:rgba(255,77,77,.05)}
@media print{
  .sheet__q{background:#fff !important;border-color:#999 !important;color:#000}
  .sheet__meta,.sheet__prompt,.sheet__t td small,.sheet__item{color:#333 !important}
  .sheet__pts,.sheet__mark{color:#000 !important}
}