/* Спільні стилі лекцій. Згенеровано framework.py assets: сюди потрапило лише те,
   що дослівно однакове в ≥95 % лекцій (95 інструкцій з 160 лекцій).
   Власні правила теми лишаються в її <style> — він іде ПІСЛЯ цього файла й перекриває. */

*{box-sizing:border-box}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:Literata,Georgia,serif; font-size:18px; line-height:1.72;
  -webkit-font-smoothing:antialiased;
}
.col{max-width:660px; margin:0 auto; padding:0 22px}
header{padding:64px 0 22px; border-bottom:1px solid var(--hair)}
.eyebrow{
  font-family:"JetBrains Mono",monospace; font-size:11.5px; letter-spacing:.18em;
  text-transform:uppercase; color:var(--soft); margin:0 0 18px;
}
h1{
  font-family:Unbounded,system-ui,sans-serif; font-weight:800;
  font-size:clamp(38px,7vw,66px); line-height:1.02; letter-spacing:-.025em;
  margin:0 0 16px; text-wrap:balance;
}
.stand{font-size:20px; color:var(--soft); margin:0 0 26px; text-wrap:balance}
.meta{
  display:flex; gap:18px; flex-wrap:wrap; font-family:"JetBrains Mono",monospace;
  font-size:12px; color:var(--soft); padding-bottom:8px;
}
.meta b{color:var(--ink); font-weight:700}
.toc{margin:34px 0 0; padding:20px 22px; background:var(--raise);
  border:1px solid var(--hair); border-radius:12px}
.toc h4{font-family:Unbounded,sans-serif; font-size:12px; letter-spacing:.08em;
  text-transform:uppercase; color:var(--soft); margin:0 0 12px; font-weight:600}
.toc ol{margin:0; padding-left:20px; columns:2; column-gap:26px; font-size:15px}
@media(max-width:620px){.toc ol{columns:1}}
.toc li{margin-bottom:5px; break-inside:avoid}
.toc a{color:var(--ink); text-decoration:none; border-bottom:1px solid transparent}
.toc a:hover{border-bottom-color:var(--rose); color:var(--rose)}
h2{
  font-family:Unbounded,system-ui,sans-serif; font-weight:600;
  font-size:clamp(24px,3.4vw,32px); line-height:1.15; letter-spacing:-.015em;
  margin:66px 0 6px; text-wrap:balance; scroll-margin-top:20px;
}
h2 .num{
  display:block; font-family:"JetBrains Mono",monospace; font-size:12px;
  font-weight:400; letter-spacing:.16em; color:var(--rose); margin-bottom:10px;
}
h3{font-family:Unbounded,system-ui,sans-serif; font-weight:600; font-size:19px; margin:36px 0 4px}
p{margin:16px 0}
a{color:var(--teal)}
strong{font-weight:600}
ul,ol.steps{margin:16px 0; padding-left:22px}
li{margin:8px 0}
.lead::first-letter{
  float:left; font-family:Unbounded,sans-serif; font-weight:800; font-size:64px;
  line-height:.82; margin:6px 10px 0 0; color:var(--rose);
}
.eq{
  font-family:"JetBrains Mono",monospace; font-size:16px; text-align:center;
  background:var(--raise); border:1px solid var(--hair); border-radius:10px;
  padding:16px 12px; margin:22px 0; overflow-x:auto; box-shadow:var(--shadow);
}
.sub{font-size:.75em; vertical-align:-.25em}
.sup{font-size:.75em; vertical-align:.42em}
.derive{margin:26px 0; border-left:2px solid var(--hair); padding-left:20px}
.derive .step{margin:20px 0}
.derive .lbl{
  font-family:"JetBrains Mono",monospace; font-size:11px; letter-spacing:.1em;
  text-transform:uppercase; color:var(--rose); display:block; margin-bottom:6px;
}
.derive .eq{margin:10px 0; text-align:left; padding:12px 14px}
.derive p{margin:8px 0; font-size:16.5px}
.note{
  border-left:3px solid var(--teal); background:var(--teal-w);
  padding:14px 18px; margin:26px 0; border-radius:0 8px 8px 0; font-size:16.5px;
}
.note b{font-family:Unbounded,sans-serif; font-size:13px; letter-spacing:.02em}
.warn{border-left-color:var(--rose); background:var(--rose-w)}
figure{
  width:min(1000px, calc(100vw - 40px));
  margin:52px 0 52px 50%; transform:translateX(-50%);
  background:var(--raise); border:1px solid var(--hair);
  border-radius:14px; padding:22px; box-shadow:var(--shadow);
}
figcaption{
  font-family:"JetBrains Mono",monospace; font-size:12px; color:var(--soft);
  margin-top:14px; padding-top:12px; border-top:1px solid var(--hair); line-height:1.55;
}
figcaption b{color:var(--ink)}
.fig-head{
  font-family:Unbounded,sans-serif; font-weight:600; font-size:15px;
  margin:0 0 4px; display:flex; align-items:center; gap:9px;
}
.fig-head::before{content:""; width:9px; height:9px; border-radius:2px; background:var(--rose); flex:none}
.fig-sub{font-size:14px; color:var(--soft); margin:0 0 16px}
.panel{display:grid; grid-template-columns:1fr 250px; gap:20px; align-items:start}
@media(max-width:720px){.panel{grid-template-columns:1fr}}
canvas{width:100%; height:auto; display:block; border-radius:8px; touch-action:none}
.ctl{margin-bottom:15px}
.ctl label{
  display:flex; justify-content:space-between; align-items:baseline; gap:10px;
  font-family:"JetBrains Mono",monospace; font-size:11.5px; letter-spacing:.06em;
  text-transform:uppercase; color:var(--soft); margin-bottom:7px;
}
.ctl label output{color:var(--rose); font-weight:700; font-size:14px; font-variant-numeric:tabular-nums}
.ctl label .raw{text-transform:none; font-size:13px; color:var(--ink)}
input[type=range]{width:100%; accent-color:var(--rose); cursor:pointer}
input[type=range]:focus-visible{outline:2px solid var(--teal); outline-offset:4px}
.readout{display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-top:4px}
.readout.one{grid-template-columns:1fr}
.cellv{background:var(--paper); border:1px solid var(--hair); border-radius:8px; padding:8px 10px}
.cellv b{
  display:block; font-family:"JetBrains Mono",monospace; font-size:10px;
  letter-spacing:.1em; text-transform:uppercase; color:var(--soft); font-weight:400;
}
button{
  width:100%; margin-top:12px; padding:9px 12px; cursor:pointer; border-radius:8px;
  font-family:Unbounded,sans-serif; font-size:12px; font-weight:600;
  border:1.5px solid var(--teal); background:transparent; color:var(--teal);
  transition:background .15s,color .15s;
}
button:hover{background:var(--teal); color:var(--raise)}
button:focus-visible{outline:2px solid var(--rose); outline-offset:3px}
.seg{display:flex; margin-bottom:15px; border:1.5px solid var(--hair); border-radius:8px; overflow:hidden}
.seg button{
  margin:0; border:0; border-radius:0; flex:1; font-size:11px; padding:8px 4px;
  color:var(--soft); background:transparent; border-right:1px solid var(--hair);
}
.seg button:last-child{border-right:0}
.seg button[aria-pressed=true]{background:var(--rose); color:#fff}
.seg button:hover{background:var(--rose-w); color:var(--ink)}
.seg button[aria-pressed=true]:hover{background:var(--rose); color:#fff}
.verdict{margin-top:12px; font-size:13.5px; line-height:1.5; color:var(--soft); min-height:62px}
.tag{
  display:inline-block; font-family:"JetBrains Mono",monospace; font-size:10px;
  letter-spacing:.1em; padding:3px 8px; border-radius:20px; margin-bottom:6px; font-weight:700;
}
.t-ok{background:var(--teal-w); color:var(--teal)}
.t-no{background:var(--rose-w); color:var(--rose)}
table{width:100%; border-collapse:collapse; margin:24px 0; font-size:15.5px}
th,td{text-align:left; padding:10px 12px; border-bottom:1px solid var(--hair)}
th{
  font-family:"JetBrains Mono",monospace; font-size:10.5px; letter-spacing:.1em;
  text-transform:uppercase; color:var(--soft); font-weight:400;
}
td:first-child{font-family:"JetBrains Mono",monospace; font-size:13px; color:var(--rose); white-space:nowrap}
.scroll-x{overflow-x:auto}
footer{margin:80px 0 60px; padding-top:26px; border-top:1px solid var(--hair);
  font-size:14px; color:var(--soft)}
footer a{color:var(--teal)}
@media (prefers-reduced-motion:reduce){*{animation:none !important; transition:none !important}}
.topnav{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 0}
.topnav a{font-family:"JetBrains Mono",monospace;font-size:12px;padding:7px 13px;
  border-radius:8px;border:1px solid var(--hair);background:var(--raise);
  color:var(--teal);text-decoration:none}
.topnav a:hover{border-color:var(--teal);background:var(--teal-w)}
.topnav .spacer{flex:1}
.nextsteps{margin:64px 0 0;padding-top:28px;border-top:1px solid var(--hair)}
.nextsteps h3{font-family:Unbounded,sans-serif;font-size:17px;margin:0 0 4px}
.nextsteps .lead-sub{color:var(--soft);font-size:15px;margin:0 0 18px}
.nextsteps .steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.step{display:flex;flex-direction:column;gap:5px;padding:15px 17px;border-radius:11px;
  border:1px solid var(--hair);background:var(--raise);text-decoration:none;color:var(--ink)}
.step:hover{border-color:var(--rose);background:var(--rose-w)}
.step .k{font-family:Unbounded,sans-serif;font-size:14px}
.step .d{font-size:13.5px;color:var(--soft);line-height:1.45}
.step .dl{font-family:"JetBrains Mono",monospace;font-size:11.5px;color:var(--teal)}
.pager{display:flex;flex-wrap:wrap;gap:12px;margin:34px 0 0}
.pager a{flex:1;min-width:210px;padding:14px 17px;border-radius:11px;
  border:1px solid var(--hair);background:var(--raise);text-decoration:none;color:var(--ink)}
.pager a:hover{border-color:var(--teal);background:var(--teal-w)}
.pager .dir{display:block;font-family:"JetBrains Mono",monospace;font-size:11px;
  letter-spacing:.1em;text-transform:uppercase;color:var(--soft);margin-bottom:3px}
.pager .ttl{font-family:Unbounded,sans-serif;font-size:14px}
.pager .next{text-align:right}