/* SH4PART v20 — thesis-deck presentation. Black & white, liquid glass, responsive. */
@font-face{font-family:'Manrope';src:url(assets/fonts/Manrope.woff2) format('woff2');font-weight:300 800;font-style:normal;font-display:swap}
@font-face{font-family:'JetBrains Mono';src:url(assets/fonts/JetBrainsMono.woff2) format('woff2');font-weight:400 700;font-style:normal;font-display:swap}

:root{
  color-scheme:light dark;
  --bg:#eeede8; --panel-bg:rgba(255,255,255,.50); --panel-brd:rgba(255,255,255,.75);
  --hi:rgba(255,255,255,.65); --ink:#0c0b0a; --muted:#6c6960; --faint:#a7a399;
  --line:rgba(0,0,0,.12); --line-2:rgba(0,0,0,.07); --shadow:rgba(28,24,18,.18);
  --chip:rgba(255,255,255,.34); --code-bg:rgba(255,255,255,.42);
  --sans:'Manrope',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.22,1,.36,1); --ease2:cubic-bezier(.4,0,.2,1);
}
html[data-theme="dark"]{
  --bg:#0b0b0c; --panel-bg:rgba(30,30,33,.46); --panel-brd:rgba(255,255,255,.14);
  --hi:rgba(255,255,255,.14); --ink:#f3f1ec; --muted:#9b988f; --faint:#5a584f;
  --line:rgba(255,255,255,.14); --line-2:rgba(255,255,255,.07); --shadow:rgba(0,0,0,.55);
  --chip:rgba(255,255,255,.06); --code-bg:rgba(0,0,0,.30);
}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]){
  --bg:#0b0b0c; --panel-bg:rgba(30,30,33,.46); --panel-brd:rgba(255,255,255,.14);
  --hi:rgba(255,255,255,.14); --ink:#f3f1ec; --muted:#9b988f; --faint:#5a584f;
  --line:rgba(255,255,255,.14); --line-2:rgba(255,255,255,.07); --shadow:rgba(0,0,0,.55);
  --chip:rgba(255,255,255,.06); --code-bg:rgba(0,0,0,.30);
}}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--ink); font-family:var(--sans);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  display:flex; flex-direction:column; min-height:100svh; overflow:hidden;
  transition:background .5s var(--ease2),color .5s var(--ease2);
}
/* subtle acrylic grain — texture, not a gradient */
.grain{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(0,0,0,.05) .6px,transparent .6px);background-size:7px 7px}
html[data-theme="dark"] .grain{background-image:radial-gradient(rgba(255,255,255,.05) .6px,transparent .6px);opacity:.45}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--ink);color:var(--bg)}

/* ---------- TOP BAR ---------- */
.topbar{position:relative;z-index:10;display:flex;align-items:center;gap:18px;
  padding:16px clamp(16px,3.4vw,40px);border-bottom:1px solid var(--line-2)}
.brand{font-family:var(--mono);font-weight:700;font-size:15px;letter-spacing:.16em;
  text-transform:uppercase;white-space:nowrap}
.brand b{color:var(--ink)}
.tabs{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;flex:1;mask-image:linear-gradient(90deg,transparent 0,#000 16px,#000 calc(100% - 16px),transparent)}
.tabs::-webkit-scrollbar{display:none}
.tab{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);white-space:nowrap;padding:7px 11px;border-radius:999px;border:1px solid transparent;
  transition:color .25s,border-color .25s,background .25s}
.tab .n{opacity:.5;margin-right:6px}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);border-color:var(--line);background:var(--chip)}
.controls{display:flex;align-items:center;gap:8px;white-space:nowrap}
.ctl{font-family:var(--mono);font-size:11px;letter-spacing:.10em;text-transform:uppercase;
  color:var(--muted);padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  transition:color .2s,border-color .2s,transform .2s,background .2s}
.ctl:hover{color:var(--ink);border-color:var(--ink);transform:translateY(-1px)}
.ctl.solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.ctl.solid:hover{opacity:.88}

/* ---------- STAGE + GLASS PANEL ---------- */
.stage{position:relative;z-index:5;flex:1;display:grid;place-items:center;
  padding:clamp(16px,2.6vh,30px) clamp(16px,3.4vw,40px);min-height:0}
.panel{position:relative;width:min(1120px,100%);height:100%;max-height:min(720px,100%);
  display:flex;flex-direction:column;border-radius:30px;
  background:var(--panel-bg);border:1px solid var(--panel-brd);
  box-shadow:0 2px 10px rgba(0,0,0,.05),0 36px 90px var(--shadow),inset 0 1px 0 var(--hi);
  backdrop-filter:blur(34px) saturate(1.4);-webkit-backdrop-filter:blur(34px) saturate(1.4);
  overflow:hidden;animation:panelIn .65s var(--ease) both}
.panel::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.04)}
.slide{position:relative;flex:1;min-height:0;overflow:auto;scrollbar-width:thin;
  padding:clamp(26px,4vw,60px) clamp(24px,4.2vw,64px);
  display:flex;flex-direction:column;gap:clamp(14px,1.8vh,22px)}
.slide::-webkit-scrollbar{width:7px}
.slide::-webkit-scrollbar-thumb{background:var(--line);border-radius:9px}

/* eyebrow / labels */
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.eyebrow .sep{width:18px;height:1px;background:var(--line);display:inline-block}
.eyebrow .label{color:var(--ink)}

h1.head,h2.head{margin:0;font-weight:800;letter-spacing:-.025em;line-height:1.02}
h2.head{font-size:clamp(26px,3.7vw,50px)}
.body{margin:0;font-size:clamp(15px,1.45vw,20px);line-height:1.5;color:var(--ink);
  max-width:64ch;font-weight:400}
.body.dim{color:var(--muted)}

/* bullet points */
ul.points{list-style:none;margin:2px 0 0;padding:0;display:flex;flex-direction:column;gap:clamp(8px,1.1vh,13px);max-width:72ch}
ul.points li{position:relative;padding-left:26px;font-size:clamp(14px,1.25vw,17.5px);line-height:1.45;color:var(--ink);font-weight:400}
ul.points li::before{content:"";position:absolute;left:0;top:.62em;width:13px;height:1.5px;background:var(--ink);opacity:.55}

/* metrics */
.metrics{display:flex;flex-wrap:wrap;gap:clamp(20px,4vw,52px);margin-top:4px}
.metric .v{font-weight:800;font-size:clamp(30px,4.6vw,58px);letter-spacing:-.03em;line-height:1}
.metric .k{font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted);
  margin-top:8px;max-width:24ch;text-transform:uppercase}

/* flow chain */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:2px}
.flow span{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--ink);
  border:1px solid var(--line);border-radius:8px;padding:7px 11px;background:var(--chip)}
.flow i{color:var(--faint);font-style:normal}

/* "next / перспективы" block */
.next{margin-top:6px;padding-top:16px;border-top:1px solid var(--line-2)}
.next .nlabel{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-bottom:9px}

/* code block */
.code{margin:2px 0 0;border-radius:16px;border:1px solid var(--line);background:var(--code-bg);overflow:hidden}
.code .bar{display:flex;align-items:center;gap:7px;padding:11px 15px;border-bottom:1px solid var(--line-2);font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.code .dot{width:9px;height:9px;border-radius:50%;border:1px solid var(--line);display:inline-block}
.code .lang{margin-left:auto;color:var(--faint)}
.code pre{margin:0;padding:16px 18px;overflow:auto;scrollbar-width:thin}
.code code{font-family:var(--mono);font-size:clamp(11.5px,1vw,13.5px);line-height:1.62;color:var(--ink);white-space:pre;display:block}
.code .cmt{color:var(--faint)}
.note{font-family:var(--mono);font-size:11.5px;color:var(--muted);line-height:1.5;max-width:80ch}

/* cover slide */
.slide.cover{justify-content:center;gap:clamp(16px,2.2vh,26px)}
.cover .name{font-weight:800;letter-spacing:-.035em;line-height:.94;font-size:clamp(38px,7vw,92px)}
.cover .tag{font-size:clamp(16px,1.7vw,23px);line-height:1.4;color:var(--muted);max-width:30ch;font-weight:400}
.stack{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.stack span{font-family:var(--mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:7px 12px}
.cover .repo{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
  display:inline-flex;align-items:center;gap:8px;width:max-content;border-bottom:1px solid var(--line);padding-bottom:3px;transition:color .2s,border-color .2s}
.cover .repo:hover{color:var(--ink);border-color:var(--ink)}
.cover .hint{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-top:6px}

/* ---------- BOTTOM NAV ---------- */
.navbar{position:relative;z-index:10;display:flex;align-items:center;gap:16px;
  padding:13px clamp(16px,3.4vw,40px);border-top:1px solid var(--line-2)}
.nav-btn{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);
  border-radius:50%;font-size:17px;color:var(--ink);transition:background .2s,color .2s,transform .2s,border-color .2s}
.nav-btn:hover{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.nav-btn:active{transform:scale(.94)}
.progress{display:flex;align-items:center;gap:14px;flex:1;min-width:0}
.counter{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--ink);white-space:nowrap}
.counter b{color:var(--ink)} .counter span{color:var(--faint)}
.dots{display:flex;gap:6px;overflow:hidden;flex-wrap:wrap}
.dot{width:22px;height:4px;border-radius:9px;background:var(--line);transition:background .3s,width .3s}
.dot.active{background:var(--ink);width:30px}
.deckmeta{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--muted);white-space:nowrap;text-align:right}
.deckmeta .hint{color:var(--faint);margin-left:10px}

/* ---------- ENTER ANIMATION (Apple-glass: rise + de-blur, staggered) ---------- */
@keyframes panelIn{from{opacity:0;transform:scale(.986) translateY(10px)}to{opacity:1;transform:none}}
@keyframes rise{from{opacity:0;transform:translateY(16px);filter:blur(7px)}to{opacity:1;transform:none;filter:blur(0)}}
.slide.enter>*{animation:rise .58s var(--ease) both}
.slide.enter>*:nth-child(1){animation-delay:.02s}
.slide.enter>*:nth-child(2){animation-delay:.08s}
.slide.enter>*:nth-child(3){animation-delay:.14s}
.slide.enter>*:nth-child(4){animation-delay:.20s}
.slide.enter>*:nth-child(5){animation-delay:.26s}
.slide.enter>*:nth-child(6){animation-delay:.32s}
.slide.enter>*:nth-child(7){animation-delay:.38s}

/* ---------- RESPONSIVE ---------- */
@media (max-width:900px){
  .panel{max-height:none;height:100%}
  .deckmeta .hint{display:none}
}
@media (max-width:680px){
  body{overflow:hidden}
  .topbar{flex-wrap:wrap;gap:10px 14px;padding:12px 16px}
  .brand{font-size:13px;order:1}
  .controls{order:2;margin-left:auto}
  .tabs{order:3;flex:1 0 100%;mask-image:linear-gradient(90deg,transparent 0,#000 10px,#000 calc(100% - 10px),transparent)}
  .stage{padding:12px}
  .panel{border-radius:24px}
  .slide{padding:24px 20px;gap:14px}
  .metrics{gap:18px 26px}
  .navbar{padding:11px 16px;gap:10px}
  .nav-btn{width:46px;height:46px}
  .dots{display:none}
  .deckmeta{display:none}
}
@media (max-width:400px){
  .cover .name{font-size:clamp(30px,9vw,40px)}
  .slide{padding:20px 16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .slide.enter>*{animation:none!important}
}