/* ============================================================
   claudemation — course landing
   Light, warm canvas in the Satura Space mold: white surfaces,
   thin borders, soft layered shadows, dark pill buttons. The
   terminal mockups stay dark — the one place the product shows
   itself. Single green accent, used sparingly. No gradients.
   Inter for body, JetBrains Mono for labels and terminals.
   ============================================================ */
:root{
  --canvas:#f7f7f4;
  --canvas-2:#f2f1ec;
  --surface:#ffffff;
  --ink:#15140f;
  --ink-2:#57554d;
  --ink-3:#8c8a80;
  --line:rgba(20,18,11,.10);
  --line-2:rgba(20,18,11,.06);

  /* green accent: --acc for graphics, --acc-ink for small text on white */
  --acc:#3fb950;
  --acc-ink:#1a7f37;
  --acc-dim:rgba(63,185,80,.14);
  --acc-line:rgba(26,127,55,.35);

  /* dark terminal tokens — used only inside mockups */
  --term-bg:#0b0d12;
  --term-panel:#11141b;
  --term-line:#252a36;
  --term-ink:#e8ecf4;
  --term-mut:#8b92a8;
  --term-dim:#6e7681;

  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --maxw:1080px;
  --r:18px;
  --shadow:0 1px 2px rgba(20,18,11,.04),0 8px 24px rgba(20,18,11,.06),0 30px 60px -30px rgba(20,18,11,.18);
  --shadow-lg:0 2px 4px rgba(20,18,11,.05),0 18px 50px -12px rgba(20,18,11,.16),0 60px 100px -50px rgba(20,18,11,.28);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
[id]{scroll-margin-top:76px}
body{
  background:var(--canvas);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:clip;
}
a{color:inherit;text-decoration:none}
a,button{-webkit-tap-highlight-color:transparent}
::selection{background:rgba(63,185,80,.28)}
:focus-visible{outline:2px solid var(--acc-ink);outline-offset:2px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.nav.scrolled{
  background:rgba(247,247,244,.85);
  border-bottom-color:var(--line);
  backdrop-filter:saturate(170%) blur(12px);
  -webkit-backdrop-filter:saturate(170%) blur(12px);
}
.nav-inner{
  position:relative;
  display:flex;align-items:center;gap:20px;height:64px;
  max-width:var(--maxw);margin:0 auto;padding:0 24px;
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:15px;font-weight:500;letter-spacing:-.01em}
.brand .mark{
  width:28px;height:28px;flex:none;display:grid;place-items:center;
  border:1px solid var(--acc-line);border-radius:8px;
  color:var(--acc-ink);font-size:12px;font-weight:700;
  background:var(--acc-dim);
}
/* centered pill of links, Satura-style */
.nav-links{
  display:none;gap:2px;padding:5px;border-radius:999px;
  position:absolute;left:50%;transform:translateX(-50%);
  background:rgba(255,255,255,.72);border:1px solid var(--line-2);
  box-shadow:0 1px 2px rgba(20,18,11,.04),0 6px 20px -8px rgba(20,18,11,.14);
  backdrop-filter:saturate(160%) blur(10px);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
}
.nav-links a{
  font-family:var(--mono);font-size:13px;color:var(--ink-2);
  padding:7px 13px;border-radius:999px;
  transition:color .15s,background .15s;
}
.nav-links a:hover{color:var(--ink);background:rgba(20,18,11,.05)}
.nav-cta{margin-left:auto}
@media(min-width:860px){.nav-links{display:flex}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--sans);font-size:14px;font-weight:600;
  padding:10px 18px;border-radius:10px;border:1px solid transparent;cursor:pointer;
  white-space:nowrap;
  transition:background .15s,border-color .15s,box-shadow .15s,transform .12s ease;
}
.btn:active{transform:translateY(1px)}
.btn-acc{
  background:var(--ink);color:#fff;
  box-shadow:0 1px 2px rgba(20,18,11,.2),inset 0 1px 0 rgba(255,255,255,.08);
}
.btn-acc:hover{background:#000}
.btn-line{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-line:hover{border-color:rgba(20,18,11,.22);box-shadow:var(--shadow)}
.btn-lg{padding:13px 26px;font-size:15px;border-radius:12px}
.nav .btn{border-radius:999px}

/* ---------- terminal mockup (pure CSS decoration) ---------- */
.term{
  text-align:left;
  background:var(--term-bg);border:1px solid rgba(20,18,11,.12);border-radius:16px;
  overflow:hidden;font-family:var(--mono);font-size:13.5px;line-height:1.7;
  box-shadow:var(--shadow-lg);
}
.term-bar{
  display:flex;align-items:center;gap:8px;
  padding:9px 14px;border-bottom:1px solid var(--term-line);
  background:var(--term-panel);
}
.term-bar .dot{width:10px;height:10px;border-radius:50%;background:#2a2f3a;flex:none}
.term-bar .ttl{margin-left:6px;font-size:11.5px;color:var(--term-mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.term-body{padding:16px 18px 18px}
.term-body .ln{display:flex;gap:10px;white-space:pre-wrap;word-break:break-word}
.term-body .ln+.ln{margin-top:4px}
.term-body .pr{color:var(--acc);flex:none;user-select:none}
.term-body .cmd{color:var(--term-ink)}
.term-body .out{color:var(--term-mut)}
.term-body .ok{color:var(--acc)}
/* schedule column: never break a cron expression across lines, and keep
   every row's command starting at the same x */
.term-body .dim{color:var(--term-dim);flex:none;white-space:nowrap;min-width:10ch}
/* blinking cursor on the last line */
.term-body .cur::after{
  content:"";display:inline-block;width:7px;height:15px;margin-left:2px;
  vertical-align:-2px;background:var(--acc);
  animation:blink 1.1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}
/* staggered line reveal when the terminal scrolls in */
.reveal .term-body .ln{opacity:0;transform:translateY(4px);transition:opacity .4s ease,transform .4s ease}
.reveal.in .term-body .ln{opacity:1;transform:none}
.reveal.in .term-body .ln:nth-child(2){transition-delay:.25s}
.reveal.in .term-body .ln:nth-child(3){transition-delay:.5s}
.reveal.in .term-body .ln:nth-child(4){transition-delay:.75s}
.reveal.in .term-body .ln:nth-child(5){transition-delay:1s}
.reveal.in .term-body .ln:nth-child(6){transition-delay:1.25s}

/* ---------- hero ---------- */
.hero{position:relative;padding:72px 0 84px;text-align:center;overflow:clip}
/* faint dot grid, fading out towards the fold */
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(20,18,11,.12) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,#000 30%,transparent 75%);
  mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,#000 30%,transparent 75%);
}
.hero .wrap{position:relative;z-index:1}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:12.5px;color:var(--ink-2);
  border:1px solid var(--line);border-radius:999px;padding:6px 14px;
  background:var(--surface);box-shadow:var(--shadow);margin-bottom:26px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--acc);box-shadow:0 0 0 3px var(--acc-dim);flex:none}
h1{
  font-size:clamp(38px,7vw,68px);line-height:1.04;letter-spacing:-.038em;font-weight:650;
  margin:0 auto;max-width:15ch;text-wrap:balance;
}
h1 .acc{color:var(--acc-ink)}
.hero-sub{
  margin:24px auto 0;max-width:58ch;
  font-size:clamp(15.5px,1.9vw,18px);color:var(--ink-2);line-height:1.6;
}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:30px}
.hero-note{
  margin-top:16px;font-family:var(--mono);font-size:12.5px;color:var(--ink-3);
  display:flex;align-items:center;gap:8px;justify-content:center;flex-wrap:wrap;
}
.hero-term{max-width:640px;margin:52px auto 0}

/* ---------- section scaffolding ---------- */
section.sec{padding:64px 0}
.sec-eyebrow{font-family:var(--mono);font-size:13px;color:var(--acc-ink);margin-bottom:14px}
h2{
  font-size:clamp(26px,4vw,40px);line-height:1.08;letter-spacing:-.03em;font-weight:650;
  max-width:24ch;text-wrap:balance;
}
.sec-sub{margin-top:16px;font-size:clamp(15px,1.7vw,17px);color:var(--ink-2);max-width:62ch;line-height:1.65}
.sec-sub b{font-weight:600;color:var(--ink)}
.center{text-align:center}
.center h2,.center .sec-sub{margin-left:auto;margin-right:auto}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px}
@media(min-width:760px){
  .cards.c3{grid-template-columns:repeat(3,1fr)}
  .cards.c2{grid-template-columns:repeat(2,1fr)}
}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:24px 22px;text-align:left;box-shadow:var(--shadow);
}
.card .tag{
  display:inline-block;font-family:var(--mono);font-size:12px;color:var(--acc-ink);
  border:1px solid var(--acc-line);border-radius:7px;padding:3px 9px;
  background:var(--acc-dim);margin-bottom:14px;
}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.6}
.card p b{font-weight:600;color:var(--ink)}
.card h3{font-size:17px;font-weight:600;letter-spacing:-.01em}
.card h3+p{margin-top:8px}

/* ---------- mechanism ---------- */
.mech-cols{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px}
@media(min-width:760px){.mech-cols{grid-template-columns:repeat(3,1fr)}}
.mech-col{border:1px solid var(--line);border-radius:var(--r);padding:22px;background:var(--surface);box-shadow:var(--shadow)}
.mech-col .no{font-family:var(--mono);font-size:12.5px;color:var(--ink-3);display:block;margin-bottom:10px}
.mech-col h3{font-size:16.5px;font-weight:600}
.mech-col p{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.6}
.mech-term{max-width:680px;margin:36px auto 0}

/* ---------- program ---------- */
.weeks{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px}
@media(min-width:700px){.weeks{grid-template-columns:1fr 1fr}}
.week{
  display:grid;grid-template-columns:44px 1fr;gap:16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px;
  box-shadow:var(--shadow);
}
.week .wn{
  font-family:var(--mono);font-size:13px;color:var(--acc-ink);
  border-right:1px solid var(--line);padding-top:2px;
}
.week h3{font-size:16px;font-weight:600}
.week p{margin-top:6px;font-size:14px;color:var(--ink-2);line-height:1.6}
/* short mono footnote under a section's grid */
.sec-note{
  margin-top:26px;font-family:var(--mono);font-size:13px;color:var(--ink-2);
  text-align:center;line-height:1.8;
}

/* ---------- artifacts ---------- */
.arts{
  display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-2);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:36px;
  box-shadow:var(--shadow);
}
@media(min-width:700px){
  .arts{grid-template-columns:1fr 1fr}
  /* an odd trailing item closes the grid full-width */
  .art:last-child:nth-child(odd){grid-column:1/-1}
}
.art{background:var(--surface);padding:22px}
.art .ck{font-family:var(--mono);color:var(--acc-ink);margin-right:10px}
.art h3{display:inline;font-size:15.5px;font-weight:600}
.art p{margin-top:8px;font-size:14px;color:var(--ink-2);line-height:1.6}

/* ---------- author ---------- */
.author-grid{display:grid;grid-template-columns:1fr;gap:36px;margin-top:36px;align-items:center}
@media(min-width:880px){.author-grid{grid-template-columns:1fr 1fr;gap:44px}}
/* the schedule terminal sits in a half-width column — shrink the type so
   its longest command still fits on one line */
.author-grid .term{font-size:12.5px}
@media(min-width:880px) and (max-width:1040px){.author-grid .term{font-size:11.5px}}
.author-copy p{font-size:clamp(15.5px,1.8vw,17.5px);color:var(--ink-2);line-height:1.7}
.author-copy p b{color:var(--ink);font-weight:600}
.author-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.stat{
  border:1px solid var(--line);border-radius:12px;padding:12px 16px;background:var(--surface);
  text-align:left;box-shadow:var(--shadow);
}
.stat b{display:block;font-family:var(--mono);font-size:17px;font-weight:600;color:var(--acc-ink)}
.stat span{display:block;margin-top:3px;font-size:12.5px;color:var(--ink-3)}

/* ---------- pricing ---------- */
.plans{display:grid;grid-template-columns:1fr;gap:16px;margin-top:36px;align-items:stretch}
@media(min-width:820px){.plans{grid-template-columns:repeat(3,1fr)}}
.plan{
  display:flex;flex-direction:column;text-align:left;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;
  box-shadow:var(--shadow);
}
.plan.hot{border:1.5px solid var(--acc-line);box-shadow:var(--shadow-lg);position:relative}
.plan.hot::before{
  content:"выбор потока";position:absolute;top:-11px;left:22px;
  font-family:var(--mono);font-size:11px;color:#fff;font-weight:600;
  background:var(--acc-ink);border-radius:6px;padding:3px 9px;
}
.plan .pn{font-family:var(--mono);font-size:13.5px;color:var(--ink-2)}
.plan .pp{margin-top:12px;font-size:32px;font-weight:650;letter-spacing:-.02em}
.plan .pp span{font-size:16px;font-weight:500;color:var(--ink-3)}
.plan ul{list-style:none;margin:18px 0 24px;display:grid;gap:9px}
.plan li{
  position:relative;padding-left:22px;font-size:14px;color:var(--ink-2);line-height:1.5;
}
.plan li::before{content:"+";position:absolute;left:0;top:0;font-family:var(--mono);color:var(--acc-ink)}
.plan li b{color:var(--ink);font-weight:600}
.plan .btn{margin-top:auto;width:100%}
.plan .seats{margin-top:10px;text-align:center;font-family:var(--mono);font-size:12px;color:var(--ink-3)}
.pricing-note{
  margin-top:26px;text-align:center;font-family:var(--mono);font-size:12.5px;
  color:var(--ink-3);line-height:1.8;
}

/* ---------- faq ---------- */
/* two fixed columns (not CSS multicol) so opening an item never
   reflows questions across columns — it only expands its own column */
.faq{display:grid;grid-template-columns:1fr;gap:0 48px;margin-top:36px;align-items:start}
@media(min-width:820px){.faq{grid-template-columns:1fr 1fr}}
.faq-col{border-top:1px solid var(--line)}
@media(max-width:819px){.faq-col+.faq-col{border-top:0}}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 34px 18px 0;font-size:15.5px;font-weight:600;letter-spacing:-.015em;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:17px;color:var(--ink-3);
  transition:transform .2s ease;
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq details p{padding:0 8px 20px 0;margin-top:-6px;font-size:14.5px;color:var(--ink-2);line-height:1.65}
.faq details p a{font-family:var(--mono);font-size:13.5px;color:var(--acc-ink);text-decoration:underline;text-underline-offset:3px}
.faq details p a:hover{color:var(--ink)}

/* ---------- apply ---------- */
.apply-box{
  max-width:860px;margin:36px auto 0;
  display:grid;grid-template-columns:1fr;gap:0;
  background:var(--surface);border:1px solid var(--line);border-radius:22px;overflow:hidden;
  box-shadow:var(--shadow-lg);
}
@media(min-width:860px){.apply-box{grid-template-columns:1fr 1fr}}
/* dark side panel — echoes the closing-CTA block of the reference */
.apply-side{
  position:relative;text-align:left;
  padding:30px 28px;background:var(--ink);color:#fff;
  /* centre the copy + terminal as one group so the panel never opens a
     dead gap when the form column is taller */
  display:flex;flex-direction:column;justify-content:center;gap:22px;
}
.apply-side::before{
  content:"";position:absolute;inset:0;opacity:.1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:32px 32px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 75%);
  mask-image:radial-gradient(circle at 50% 30%,#000,transparent 75%);
}
.apply-side>*{position:relative}
.apply-side .term{box-shadow:none;border-color:rgba(255,255,255,.14)}
.apply-side p{font-size:14.5px;color:rgba(255,255,255,.75);line-height:1.65}
.apply-form{padding:30px 28px;text-align:left}
.field{margin-bottom:16px}
.field label{
  display:block;font-family:var(--mono);font-size:12.5px;color:var(--ink-2);margin-bottom:7px;
}
.field input,.field textarea{
  width:100%;font-family:var(--sans);font-size:14.5px;color:var(--ink);
  background:var(--surface);border:1px solid rgba(20,18,11,.16);border-radius:10px;
  padding:11px 13px;transition:border-color .15s,box-shadow .15s;
}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--acc-ink);box-shadow:0 0 0 3px var(--acc-dim)}
.field textarea{resize:vertical;min-height:96px}
.apply-form .btn{width:100%}
.form-note{margin-top:14px;font-size:12.5px;color:var(--ink-3);line-height:1.6}
.form-status{margin-top:14px;font-family:var(--mono);font-size:13px;line-height:1.6;display:none}
.form-status.ok{display:block;color:var(--acc-ink)}
.form-status.err{display:block;color:#d1242f}

/* ---------- contact ---------- */
.contact{padding:8px 0 72px}
.contact-box{
  max-width:860px;margin:0 auto;/* same width as the application form above */
  display:grid;grid-template-columns:1fr;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:22px;
  box-shadow:var(--shadow-lg);
}
@media(min-width:860px){.contact-box{grid-template-columns:1fr 1fr}}
.contact-media{position:relative;min-height:220px;background:var(--canvas-2)}
.contact-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
@media(min-width:860px){.contact-media{min-height:100%}}
.contact-copy{padding:30px 28px;text-align:left;display:flex;flex-direction:column;justify-content:center}
.contact-copy h2{font-size:clamp(22px,2.6vw,30px);max-width:16ch}
.contact-copy p{margin-top:14px;font-size:15.5px;color:var(--ink-2);line-height:1.65;max-width:44ch}
.contact-copy .btn{margin-top:24px}
.contact-handle{
  margin-top:14px;font-family:var(--mono);font-size:13.5px;color:var(--ink-3);
}
.contact-handle a{color:var(--acc-ink);text-decoration:underline;text-underline-offset:3px}
.contact-handle a:hover{color:var(--ink)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:28px 0 34px;margin-top:40px}
.foot{
  display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:12.5px;color:var(--ink-3);
}
.foot a{color:var(--ink-3);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--line)}
.foot a:hover{color:var(--ink-2)}

/* ---------- sticky bottom cta ---------- */
.scta{
  position:fixed;left:0;right:0;bottom:16px;z-index:55;padding:0 16px;
  opacity:0;transform:translateY(24px);pointer-events:none;
  transition:opacity .4s ease,transform .4s ease;
}
.scta.show{opacity:1;transform:none;pointer-events:auto}
.scta-inner{
  max-width:560px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 10px 10px 18px;border-radius:16px;
  background:rgba(255,255,255,.88);border:1px solid var(--line);
  backdrop-filter:saturate(170%) blur(16px);
  -webkit-backdrop-filter:saturate(170%) blur(16px);
  box-shadow:0 1px 2px rgba(20,18,11,.05),0 20px 44px -20px rgba(20,18,11,.4);
}
.scta-copy{font-family:var(--mono);font-size:12.5px;color:var(--ink-2);line-height:1.4;min-width:0}
.scta .btn{flex:none}
@media(max-width:480px){.scta-copy{display:none}.scta .btn{flex:1}}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal .term-body .ln{opacity:1;transform:none;transition:none}
  .term-body .cur::after{animation:none}
  .scta{transition:none}
}