/* BlockSiFr Academy — professional, fast, student-first. */
:root{
  --bg:#f6f7f9; --surface:#ffffff; --ink:#111827; --muted:#5b6475; --line:#e3e6eb;
  --accent:#1f5eff; --accent-ink:#ffffff; --accent-soft:#e8efff;
  --ok:#137a3f; --ok-soft:#e6f5ec; --warn:#a15c07; --warn-soft:#fdf2e3; --bad:#b42318; --bad-soft:#fdecea;
  --term:#0c1220; --term-ink:#d8e1f0; --radius:10px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.55 var(--font)}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
h1{font-size:2rem;line-height:1.2;margin:.2em 0 .4em;letter-spacing:-.01em}
h2{font-size:1.35rem;margin:.2em 0 .5em} h3{font-size:1.05rem;margin:.2em 0 .5em} h4{margin:1em 0 .3em;font-size:.85rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
p{margin:.4em 0 .8em}
code,pre{font-family:var(--mono);font-size:.88em}
.muted{color:var(--muted)} .small{font-size:.86rem} .big{font-size:1.6rem;font-weight:650;margin:.1em 0}
.lead{font-size:1.1rem;color:#374151;max-width:60ch}
.eyebrow{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 .3em;font-weight:600}
.row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap} .between{justify-content:space-between} .spacer{flex:1}

/* header */
.top{display:flex;align-items:center;justify-content:space-between;padding:.7rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{color:var(--ink);font-weight:600;display:flex;align-items:center;gap:.5rem}
.brand:hover{text-decoration:none} .brand b{color:var(--accent)}
.mark{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:7px;background:var(--ink);color:#fff;font-weight:700}
.top nav{display:flex;gap:1.1rem;align-items:center}
.top nav a{color:var(--muted);font-weight:500} .top nav a.on{color:var(--ink)} .top nav a.btn{color:var(--accent-ink)}
.inline{display:inline} button.link{background:none;border:0;color:var(--muted);font:inherit;cursor:pointer;padding:0}
main{max-width:1120px;margin:0 auto;padding:1.5rem}
body.wide main{max-width:none;padding:0}
.foot{max-width:1120px;margin:2rem auto;padding:1rem 1.5rem;color:var(--muted);display:flex;gap:1.5rem;font-size:.85rem;border-top:1px solid var(--line)}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);border:1px solid var(--accent);border-radius:8px;padding:.55rem 1rem;font:600 .95rem var(--font);cursor:pointer}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn.big{padding:.8rem 1.4rem;font-size:1.05rem}
.btn.small{padding:.3rem .7rem;font-size:.85rem}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.wide{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed}

/* cards and alerts */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.2rem;margin:0 0 1rem}
a.card{display:block;color:inherit} a.card:hover{border-color:#c5ccd8;text-decoration:none}
.alert{border-radius:8px;padding:.7rem 1rem;margin:0 0 1rem;background:var(--warn-soft);color:var(--warn)}
.alert.error{background:var(--bad-soft);color:var(--bad)} .alert.ok{background:var(--ok-soft);color:var(--ok)}
.tag{font-size:.75rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.quote{font-size:1.1rem;font-weight:500}
.ticket{border-left:4px solid var(--accent)}
.chips{list-style:none;padding:0;margin:.3rem 0;display:flex;flex-wrap:wrap;gap:.4rem}
.chips li{background:var(--accent-soft);color:#1b3d99;border-radius:99px;padding:.15rem .6rem;font-size:.8rem}

/* landing */
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:2.5rem;align-items:center;padding:2.5rem 0}
.hero h1{font-size:2.6rem}
.cta{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;margin-top:1.2rem}
.ticket-demo{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.2rem;box-shadow:0 10px 30px rgba(15,23,42,.06)}
.term{background:var(--term);color:var(--term-ink);border-radius:8px;padding:.9rem;overflow:auto;white-space:pre;font-size:.8rem;line-height:1.5}
.resolved{margin-top:.6rem;background:var(--ok-soft);color:var(--ok);border-radius:8px;padding:.5rem .8rem;font-size:.9rem}
section{margin:0 0 2rem}
.band{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.6rem}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.two{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;align-items:start}
.path{columns:3;list-style:none;padding:0} .path li{padding:.25rem 0;break-inside:avoid}
.path .n,.domain-card .n{display:inline-grid;place-items:center;width:1.6rem;height:1.6rem;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:.8rem;margin-right:.5rem}
.approval .who{font-weight:600;margin-bottom:.3rem}
.approval .actions{display:flex;gap:.4rem;margin-top:.6rem}
.plans{display:grid;grid-template-columns:repeat(2,minmax(0,380px));gap:1.2rem;margin:1rem 0}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1.4rem}
.plan.featured{border:2px solid var(--accent)}
.price{font-size:2rem;font-weight:700} .price span{font-size:1rem;color:var(--muted);font-weight:500}
.plan ul{padding-left:1.1rem}

/* forms */
.narrow{max-width:520px;margin:1.5rem auto}
.form{display:grid;gap:.9rem;margin:1rem 0}
label{display:grid;gap:.3rem;font-weight:500;font-size:.92rem}
input,textarea,select{font:inherit;padding:.55rem .7rem;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
input:focus,textarea:focus,select:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
.hint{font-weight:400;color:var(--muted);font-size:.8rem}
.checkrow{display:flex;gap:.5rem;align-items:center;font-weight:400}

/* dashboard */
.dash{display:grid;grid-template-columns:1fr 320px;gap:1.2rem}
.continue{border-left:4px solid var(--warn)}
.today{border-left:4px solid var(--accent)}
.bars{width:100%;border-collapse:collapse}
.bars td{padding:.35rem .3rem;vertical-align:middle;border-bottom:1px solid #f0f2f5}
.bars td:first-child{width:38%} .bars td.num{width:4.5rem;text-align:right;font-variant-numeric:tabular-nums;color:var(--muted)}
.bar{background:#eef1f5;border-radius:99px;height:8px;overflow:hidden;min-width:60px;position:relative}
td.bar{padding:0!important;background:none} td.bar span,.bar span{display:block;height:8px;border-radius:99px;background:var(--accent)}
td.bar span{background:var(--accent)} td.bar{position:relative}
td.bar::before{content:"";display:block;position:absolute;left:0;right:0;top:50%;height:8px;margin-top:-4px;background:#eef1f5;border-radius:99px;z-index:0}
td.bar span{position:relative;z-index:1}
.bar.thin{height:5px;margin:.5rem 0} .bar.thin span{height:5px}
span.high{background:var(--ok)!important} span.mid{background:var(--accent)!important} span.low{background:#9aa3b2!important}
.level h3{font-size:1.3rem}
.stats{display:grid;grid-template-columns:repeat(3,1fr);text-align:center;gap:.5rem;margin-top:.5rem}
.stats b{display:block;font-size:1.4rem} .stats span{font-size:.75rem;color:var(--muted)}

/* curriculum */
.domains{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.domain-card h3{margin-top:.5rem}
.labpath{columns:2;padding-left:1.4rem}
.labpath li{margin:.25rem 0;break-inside:avoid}
.labpath li.done .t{color:var(--ok)} .labpath li.locked .t{color:#9aa3b2}
.labpath .meta{display:block;font-size:.78rem;color:var(--muted)}
.two-col{display:grid;grid-template-columns:1.4fr 1fr;gap:1.5rem}
.lesson h3{margin:0}
.try{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:.7rem .8rem;margin:.6rem 0}
.trycmd{display:grid;gap:.1rem;margin:.4rem 0} .trycmd code{background:var(--term);color:var(--term-ink);padding:.3rem .5rem;border-radius:6px;overflow-x:auto;white-space:nowrap}
.trycmd span{font-size:.82rem;color:var(--muted)}
.labcard.done{border-left:4px solid var(--ok)} .labcard.locked{opacity:.6}
.sub{margin-top:1.2rem}
.brief .systems{padding-left:1.1rem}
.sev{color:var(--bad);font-weight:700}

/* lab room */
.room{display:grid;grid-template-columns:300px 1fr 360px;height:calc(100vh - 53px)}
.room-left,.room-right{background:var(--surface);overflow-y:auto;padding:1rem}
.room-left{border-right:1px solid var(--line)} .room-right{border-left:1px solid var(--line);display:flex;flex-direction:column;gap:.6rem}
.room-center{display:flex;flex-direction:column;min-width:0;background:var(--term)}
.room-left h2{font-size:1.1rem}
.sevbar{background:var(--bad);color:#fff;font-weight:700;letter-spacing:.06em;padding:.35rem .7rem;border-radius:6px;display:inline-block;font-size:.8rem;margin-bottom:.5rem}
.termbar,.actionsbar{display:flex;align-items:center;gap:.6rem;padding:.5rem .8rem;background:#141b2d;color:var(--term-ink)}
.actionsbar .btn.ghost{color:var(--term-ink);border-color:#33405c}
.pill{font-size:.8rem;padding:.15rem .6rem;border-radius:99px;background:#26324d}
.pill.ready{background:#123d2a;color:#9ee6b9} .pill.bad{background:#4a1a18;color:#ffb4ab} .pill.done{background:#1f3b80;color:#c9d8ff}
.terminal{flex:1;min-height:0;padding:.4rem .6rem;overflow:hidden}
.terminal .boot{color:#8ea0c0;padding:1rem;font-family:var(--mono);font-size:.85rem}
.lineterm{height:100%;display:flex;flex-direction:column;font-family:var(--mono);font-size:.85rem;color:var(--term-ink)}
.lineterm pre{flex:1;margin:0;overflow:auto;white-space:pre-wrap;word-break:break-all}
.lineterm input{background:#0f1729;color:var(--term-ink);border:1px solid #2a3654;font-family:var(--mono)}
.timeline{list-style:none;padding:0;margin:0;font-size:.86rem}
.timeline li{padding:.35rem 0 .35rem .8rem;border-left:2px solid var(--bad);margin-left:.2rem}
.timeline li b{font-variant-numeric:tabular-nums;margin-right:.4rem}
.checks{margin-top:1rem;font-size:.85rem}
.checks .c{padding:.2rem 0} .checks .c.ok{color:var(--ok)} .checks .c.no{color:var(--bad)} .checks .c.adv{color:var(--warn)}
.bookit-head{display:flex;justify-content:space-between;align-items:center}
.bookit-head select{padding:.2rem .4rem;font-size:.8rem}
.chat{flex:1;min-height:180px;overflow-y:auto;display:flex;flex-direction:column;gap:.5rem}
.msg{padding:.5rem .7rem;border-radius:10px;font-size:.9rem;max-width:92%;white-space:pre-wrap}
.msg.me{align-self:flex-end;background:var(--accent-soft)} .msg.bot{align-self:flex-start;background:#f3f4f6}
.msg.sys{align-self:stretch;background:#f8fafc;border:1px dashed var(--line);font-family:var(--mono);font-size:.78rem;max-height:220px;overflow:auto}
.chatform{display:flex;gap:.4rem} .chatform input{flex:1}
.investigate summary{cursor:pointer;font-weight:500;font-size:.9rem}
.invlist{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.4rem}
.card.approval{border:1px solid #c7d4fb;background:#f7f9ff}
.card.approval.decided{opacity:.8;background:#fafafa;border-color:var(--line)}
.dlg{border:0;border-radius:14px;padding:1.4rem;max-width:620px;width:92vw;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.dlg form{display:grid;gap:.8rem}
.dlg::backdrop{background:rgba(15,23,42,.45)}

/* result / profile */
.verdict.ok{border-top:6px solid var(--ok)} .verdict.bad{border-top:6px solid var(--warn)}
.verdict h1{letter-spacing:.04em}
.grid3{display:grid;grid-template-columns:1.4fr 1fr .6fr;gap:1.2rem}
.statgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:.8rem}
.statgrid .card b{display:block;font-size:1.5rem} .statgrid .card span{font-size:.8rem;color:var(--muted)}

@media (max-width:900px){
  .hero,.two,.three,.dash,.two-col,.grid3{grid-template-columns:1fr}
  .domains{grid-template-columns:1fr 1fr} .statgrid{grid-template-columns:1fr 1fr} .path,.labpath{columns:1}
  .room{grid-template-columns:1fr;height:auto} .terminal{height:60vh}
  .plans{grid-template-columns:1fr}
  .top{padding:.6rem 1rem} .top nav{gap:.7rem;font-size:.9rem}
}

/* assessment + bonus labs */
.wide-narrow{max-width:720px}
.question h2{font-size:1.2rem}
.choices{display:grid;gap:.5rem;margin:1rem 0}
.choice{display:flex;gap:.6rem;align-items:flex-start;font-weight:400;border:1px solid var(--line);border-radius:8px;padding:.65rem .8rem;cursor:pointer}
.choice:hover{border-color:#c5ccd8} .choice input{margin-top:.25rem}
.tier{font-size:.78rem;font-weight:600;border-radius:99px;padding:.15rem .6rem}
.tier.t1{background:#eef1f5;color:#374151} .tier.t2{background:var(--accent-soft);color:#1b3d99} .tier.t3{background:var(--ok-soft);color:var(--ok)}
.placement td:first-child{width:40%}
.bonus{border-left:4px solid var(--ok)}
.bonusrow{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.7rem 0;border-top:1px solid #f0f2f5}
.bonusrow .quote{margin:.3rem 0 0;font-size:.92rem;color:#374151}
.bonusrow .btn,.bonusrow form{white-space:nowrap;flex-shrink:0}

/* ---- mobile fixes ---- */
.hero > *, .two > *, .dash > *, .two-col > *, .grid3 > * { min-width: 0 }
.term { max-width: 100% }
@media (max-width: 700px) {
  .top { flex-wrap: wrap; gap: .4rem; padding: .55rem 1rem }
  .brandname b { display: inline }
  .top nav { width: 100%; overflow-x: auto; gap: 1rem; padding-bottom: .2rem; white-space: nowrap; scrollbar-width: none }
  .top nav::-webkit-scrollbar { display: none }
  main { padding: 1rem }
  .hero { padding: 1rem 0; gap: 1.5rem } .hero h1 { font-size: 2rem }
  h1 { font-size: 1.6rem }
  .term { font-size: .72rem; white-space: pre-wrap; word-break: break-word }
  .cta { flex-direction: column; align-items: stretch } .cta .btn { text-align: center }
  .facts { grid-template-columns: 1fr 1fr }
  .bonusrow { flex-direction: column; align-items: stretch }
  .shareactions .sharelinks { flex-direction: column; align-items: stretch }
  .pager { flex-direction: column }
}

/* ---- landing ---- */
.typing { white-space: normal } .typing .l { display: block; white-space: pre-wrap; opacity: 0; animation: appear .01s forwards }
.typing .l1 { animation-delay: .4s } .typing .l2 { animation-delay: 1.4s } .typing .l3 { animation-delay: 2.4s }
.typing .l4 { animation-delay: 3.3s } .typing .l5 { animation-delay: 4.4s } .typing .l6 { animation-delay: 5.4s } .typing .l7 { animation-delay: 6.2s }
.resolved.l { opacity: 0; animation: appear .3s 7s forwards }
.term .err { color: #ffb4ab } .term .ok { color: #9ee6b9 }
@keyframes appear { to { opacity: 1 } }
@media (prefers-reduced-motion: reduce) { .typing .l, .resolved.l { animation: none; opacity: 1 } }
.quiz h2 { margin-bottom: 1rem }
.qz { border-top: 1px solid var(--line); padding: .9rem 0 }
.qzopts { display: grid; gap: .4rem; margin: .5rem 0 }
.qzopt { text-align: left; font: inherit; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: .55rem .8rem; cursor: pointer }
.qzopt:hover { border-color: #c5ccd8 }
.qzopt.right { border-color: var(--ok); background: var(--ok-soft) } .qzopt.wrong { border-color: var(--bad); background: var(--bad-soft) }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; text-align: center }
.facts b { display: block; font-size: 1.8rem } .facts span { color: var(--muted); font-size: .85rem }

/* ---- lesson reader ---- */
.reader { max-width: 720px; margin: 0 auto }
.crumbs { color: var(--muted); margin-bottom: .4rem }
.lessonsteps { display: flex; align-items: center; gap: .35rem; margin: .4rem 0 1rem }
.lessonsteps .dot { width: 26px; height: 6px; border-radius: 99px; background: #e3e6eb }
.lessonsteps .dot.done { background: var(--ok) } .lessonsteps .dot.current { background: var(--accent) }
.lessonsteps .small { margin-left: .5rem }
.tldr { background: var(--accent-soft); border-radius: 10px; padding: .8rem 1rem; margin: 0 0 1.2rem }
.tldr p { margin: .2rem 0 0; font-weight: 500 }
.prose { font-size: 1.05rem; line-height: 1.7; max-width: 65ch }
.cmdrow { display: flex; gap: .4rem; align-items: stretch }
.cmdrow code { flex: 1; min-width: 0 }
.copy { font: 600 .78rem var(--font); border: 1px solid var(--line); border-radius: 6px; background: #fff; padding: 0 .6rem; cursor: pointer }
.check { margin-top: 1.5rem; border-left: 4px solid var(--accent) }
.takeaway { background: var(--ok-soft); color: #0f4d2a; border-radius: 8px; padding: .7rem .9rem }
.pager { display: flex; justify-content: space-between; gap: .8rem; margin: 1.5rem 0 }
.lessonlist { list-style: none; padding: 0; margin: 0 0 .8rem }
.lessonlist li a { display: flex; gap: .8rem; align-items: center; padding: .75rem .9rem; border: 1px solid var(--line); border-radius: 10px; background: #fff; margin-bottom: .5rem; color: inherit }
.lessonlist li a:hover { border-color: #c5ccd8; text-decoration: none }
.lessonlist .num { flex: 0 0 1.9rem; height: 1.9rem; border-radius: 50%; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .85rem }
.lessonlist li.done .num, .lessonlist li.placed .num { background: var(--ok-soft); color: var(--ok) }
.lessonlist .t { flex: 1; display: grid; min-width: 0 } .lessonlist .meta { white-space: nowrap }
.statline { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; color: var(--muted); font-size: .9rem }
.okc { color: var(--ok) }
.labcard .quote { margin: .3rem 0; color: #374151; font-size: .92rem; font-weight: 400 }

/* ---- dashboard subjects ---- */
.subjects { display: grid; gap: .2rem }
.subject { display: grid; grid-template-columns: 9.5rem 1fr auto; gap: .8rem; align-items: center; padding: .45rem .2rem; color: inherit; border-bottom: 1px solid #f0f2f5 }
.subject:hover { text-decoration: none; background: #fafbfc }
.subject .sname { font-weight: 500 }
@media (max-width: 700px) { .subject { grid-template-columns: 1fr; gap: .25rem } }

/* ---- sharing ---- */
.sharebox { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center; border-left: 4px solid var(--accent) }
.sharelinks { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; max-width: 520px }
.shareurl { flex: 1 1 220px }
.sharepage { max-width: 760px; margin: 0 auto }
.sharecard h1 { letter-spacing: .02em }
.verify { margin-top: 1rem; font-weight: 600; color: var(--muted) } .verify.ok { color: var(--ok) }
.cta { text-align: center } .cta .btn { margin-top: .4rem }
.publicbox { margin-top: 1rem }
@media (max-width: 700px) { .sharebox { grid-template-columns: 1fr } }

.lead1 { font-weight: 600 }