/* =========================================================
   SILICON.LOG — design tokens
   Тема: кремниевая пластина / текстолит платы / трассы данных
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --bg:        #0a0d13;
  --surface:   #11151d;
  --surface-2: #161b25;
  --line:      rgba(232,236,242,0.10);
  --line-strong: rgba(232,236,242,0.18);
  --text:      #e9edf3;
  --text-dim:  #97a1b0;
  --text-faint:#5f6879;

  --teal:      #49d6c4;
  --violet:    #9b8cf0;
  --magenta:   #e8659b;
  --copper:    #d08a5c;

  --grad-iri: linear-gradient(120deg, var(--teal) 0%, var(--violet) 48%, var(--magenta) 100%);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --maxw: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(155,140,240,0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(73,214,196,0.08), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family:var(--font-display); margin:0; line-height:1.15; letter-spacing:-0.01em; }
p{ margin:0; }

:focus-visible{
  outline:2px solid var(--teal);
  outline-offset:3px;
  border-radius:2px;
}

.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--text-dim);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:7px; height:7px;
  background:var(--grad-iri);
  border-radius:1px;
  transform:rotate(45deg);
  flex:none;
}

/* =========================== HEADER =========================== */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(10,13,19,0.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:68px;
}
.logo{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:16px;
  letter-spacing:0.02em;
  display:flex; align-items:center; gap:10px;
}
.logo .dot{
  width:10px;height:10px;border-radius:2px;
  background:var(--grad-iri);
  transform:rotate(45deg);
}
.logo b{ color:var(--text); font-weight:600; }
.logo span{ color:var(--text-faint); }

nav.main-nav ul{ display:flex; gap:2px; }
nav.main-nav a{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--text-dim);
  padding:10px 14px;
  border-radius:6px;
  transition:color .15s ease, background .15s ease;
  position:relative;
}
nav.main-nav a:hover{ color:var(--text); background:var(--surface-2); }
nav.main-nav a.active{ color:var(--text); }
nav.main-nav a.active::after{
  content:"";
  position:absolute; left:14px; right:14px; bottom:4px;
  height:2px; background:var(--grad-iri); border-radius:2px;
}
.nav-toggle{ display:none; }

@media (max-width:820px){
  nav.main-nav ul{ gap:0; flex-wrap:wrap; justify-content:flex-end; }
  nav.main-nav a{ font-size:11.5px; padding:8px 9px; }
}

/* =========================== TRACE DIVIDER (signature element) =========================== */
/* Дорожка платы, соединяющая разделы — сигнатурный элемент сайта */
.trace{
  position:relative;
  width:100%;
  height:64px;
  margin:0 auto;
  max-width:var(--maxw);
  overflow:visible;
}
.trace svg{ width:100%; height:100%; overflow:visible; }
.trace path.rail{
  fill:none;
  stroke:var(--line-strong);
  stroke-width:1.5;
}
.trace path.pulse{
  fill:none;
  stroke:url(#traceGrad);
  stroke-width:2;
  stroke-linecap:round;
  stroke-dasharray:120 900;
  stroke-dashoffset:0;
  animation:traceflow 5.5s linear infinite;
}
.trace circle.pad{
  fill:var(--bg);
  stroke:var(--line-strong);
  stroke-width:1.5;
}
@keyframes traceflow{
  to{ stroke-dashoffset:-1020; }
}

/* =========================== HERO =========================== */
.hero{
  position:relative;
  padding:88px 0 64px;
  overflow:hidden;
}
.hero .wrap{
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:48px;
  align-items:center;
}
@media (max-width:900px){
  .hero .wrap{ grid-template-columns:1fr; }
}
.hero h1{
  font-size:clamp(34px,5vw,58px);
  margin-top:16px;
  font-weight:600;
}
.hero .lede{
  margin-top:20px;
  font-size:18px;
  color:var(--text-dim);
  max-width:56ch;
}
.hero-art{
  aspect-ratio:1/1;
  border-radius:22px;
  position:relative;
  border:1px solid var(--line);
  background:var(--surface);
  overflow:hidden;
}

/* generic wafer sheen background used across hero arts */
.wafer-sheen{
  position:absolute; inset:0;
  background:
    conic-gradient(from 200deg at 30% 20%, rgba(73,214,196,0.35), rgba(155,140,240,0.30) 30%, rgba(232,101,155,0.28) 55%, rgba(73,214,196,0.35) 100%);
  filter:blur(40px) saturate(140%);
  opacity:0.55;
}

/* =========================== BUTTONS / CHIPS =========================== */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono);
  font-size:13px; letter-spacing:0.04em; text-transform:uppercase;
  padding:12px 20px;
  border-radius:8px;
  border:1px solid var(--line-strong);
  color:var(--text);
  transition:border-color .15s ease, transform .15s ease, background .15s ease;
}
.btn:hover{ border-color:var(--teal); transform:translateY(-1px); }
.btn.primary{
  background:var(--grad-iri);
  color:#0a0d13;
  border:none;
  font-weight:600;
}
.btn.primary:hover{ filter:brightness(1.08); }

.tagset{ display:flex; flex-wrap:wrap; gap:8px; margin-top:22px; }
.tag{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:0.04em;
  color:var(--text-dim);
  border:1px solid var(--line);
  padding:6px 10px;
  border-radius:999px;
}

/* =========================== SECTION / CARDS =========================== */
section{ padding:64px 0; }
.section-head{ max-width:64ch; margin-bottom:40px; }
.section-head h2{ font-size:clamp(26px,3.4vw,36px); margin-top:14px; }
.section-head p{ margin-top:14px; color:var(--text-dim); font-size:16.5px; }

.grid-cards{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
@media (max-width:980px){ .grid-cards{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ .grid-cards{ grid-template-columns:1fr; } }

.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  padding:22px;
  display:flex; flex-direction:column; gap:12px;
  transition:border-color .15s ease, transform .15s ease;
}
.card:hover{ border-color:var(--line-strong); transform:translateY(-2px); }
.card .icon{ width:38px; height:38px; }
.card h3{ font-size:17px; font-weight:600; }
.card p{ color:var(--text-dim); font-size:14.5px; }
.card a.more{
  margin-top:auto;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--teal);
  letter-spacing:0.04em;
}

/* article hub tiles on homepage */
.hub-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
@media (max-width:760px){ .hub-grid{ grid-template-columns:1fr; } }

.hub-tile{
  position:relative;
  border-radius:18px;
  border:1px solid var(--line);
  background:var(--surface);
  padding:30px;
  overflow:hidden;
  min-height:230px;
  display:flex; flex-direction:column; justify-content:flex-end;
  transition:transform .18s ease, border-color .18s ease;
}
.hub-tile:hover{ transform:translateY(-3px); border-color:var(--line-strong); }
.hub-tile .glyph{
  position:absolute; top:24px; right:24px; width:64px; height:64px; opacity:0.9;
}
.hub-tile .kicker{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--text-dim); margin-bottom:10px;
}
.hub-tile h3{ font-size:23px; margin-bottom:10px; }
.hub-tile p{ color:var(--text-dim); font-size:14.5px; max-width:40ch; }
.hub-tile .num{
  position:absolute; left:26px; top:22px;
  font-family:var(--font-mono); font-size:12px; color:var(--text-faint);
}

/* =========================== DATASHEET (signature spec box) =========================== */
.datasheet{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
}
.datasheet .ds-head{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--text-dim);
}
.datasheet .ds-head .blink{
  width:6px;height:6px;border-radius:50%;
  background:var(--teal);
  box-shadow:0 0 0 3px rgba(73,214,196,0.15);
}
.datasheet dl{ margin:0; }
.datasheet .row{
  display:grid; grid-template-columns:auto 1fr;
  gap:16px;
  padding:12px 18px;
  border-bottom:1px solid var(--line);
  align-items:baseline;
}
.datasheet .row:last-child{ border-bottom:none; }
.datasheet dt{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-faint);
  white-space:nowrap;
}
.datasheet dd{
  margin:0;
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--text);
  text-align:right;
}

/* =========================== ARTICLE LAYOUT =========================== */
.article-hero{
  padding:56px 0 40px;
  border-bottom:1px solid var(--line);
}
.article-hero .kicker{
  font-family:var(--font-mono); font-size:12px; letter-spacing:0.12em; text-transform:uppercase;
  color:var(--text-dim);
}
.article-hero h1{
  font-size:clamp(30px,4.6vw,48px);
  margin-top:16px;
  max-width:22ch;
}
.article-hero .dek{
  margin-top:18px;
  font-size:17.5px;
  color:var(--text-dim);
  max-width:64ch;
}
.meta-row{
  display:flex; gap:18px; flex-wrap:wrap; align-items:center;
  margin-top:24px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-faint);
}
.meta-row .sep{ width:4px;height:4px;background:var(--text-faint);border-radius:50%; }

.article-body{
  display:grid;
  grid-template-columns:1fr 300px;
  gap:56px;
  padding:48px 0 20px;
  align-items:start;
}
@media (max-width:940px){
  .article-body{ grid-template-columns:1fr; }
}
.prose{ max-width:70ch; }
.prose h2{
  font-size:24px;
  margin-top:44px;
  margin-bottom:16px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.prose h2:first-child{ margin-top:0; padding-top:0; border-top:none; }
.prose p{ margin-bottom:18px; color:#ced4dd; font-size:16.5px; }
.prose p.lead{
  font-size:19px;
  color:var(--text);
  font-family:var(--font-display);
  font-weight:400;
  line-height:1.45;
}
.prose ul{ margin:0 0 18px 0; display:flex; flex-direction:column; gap:10px; }
.prose ul li{
  color:#ced4dd; font-size:16px;
  padding-left:22px; position:relative;
}
.prose ul li::before{
  content:"";
  position:absolute; left:0; top:9px;
  width:8px; height:2px;
  background:var(--grad-iri);
}
.pull{
  margin:28px 0;
  padding:20px 24px;
  border-left:2px solid var(--teal);
  background:var(--surface);
  border-radius:0 10px 10px 0;
  font-family:var(--font-display);
  font-size:19px;
  color:var(--text);
}
.pull span{
  display:block; margin-top:10px;
  font-family:var(--font-mono); font-size:11.5px; color:var(--text-faint);
  text-transform:uppercase; letter-spacing:0.06em;
}

.sidebar{ display:flex; flex-direction:column; gap:24px; position:sticky; top:90px; }
.sidebar .box-title{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--text-dim); margin-bottom:12px;
}
.related-list{ display:flex; flex-direction:column; gap:10px; }
.related-list a{
  display:block;
  padding:12px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  font-size:14px;
  transition:border-color .15s ease, background .15s ease;
}
.related-list a:hover{ border-color:var(--line-strong); background:var(--surface); }
.related-list a small{ display:block; color:var(--text-faint); font-family:var(--font-mono); font-size:10.5px; margin-top:5px; text-transform:uppercase; letter-spacing:0.05em; }

.sources-box{
  border:1px solid var(--line);
  border-radius:12px;
  padding:16px 18px;
  font-size:13px;
  color:var(--text-faint);
  line-height:1.6;
}

/* comparison table */
.comp-table{
  width:100%;
  border-collapse:collapse;
  margin:8px 0 24px;
  font-size:14.5px;
}
.comp-table th,.comp-table td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.comp-table th{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--text-faint);
  font-weight:500;
}
.comp-table td{ color:#ced4dd; }
.comp-table tr:last-child td{ border-bottom:none; }
.comp-table td.hl{ color:var(--teal); font-family:var(--font-mono); }

/* =========================== FOOTER =========================== */
footer{
  border-top:1px solid var(--line);
  padding:48px 0 40px;
  margin-top:40px;
}
footer .wrap{
  display:flex; justify-content:space-between; align-items:flex-start; gap:24px; flex-wrap:wrap;
}
footer .fcol h4{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:0.08em; text-transform:uppercase;
  color:var(--text-dim); margin-bottom:14px;
}
footer .fcol ul{ display:flex; flex-direction:column; gap:9px; }
footer .fcol a{ font-size:14px; color:var(--text-dim); }
footer .fcol a:hover{ color:var(--text); }
footer .fine{
  margin-top:40px;
  padding-top:20px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--text-faint);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}