/* ============================================================
   nourredine.tech — design system v2
   Editorial dark. No frameworks. Tokens first, components second.
   ============================================================ */

/* ---------- tokens ---------- */
:root{
  --bg:#07080c;
  --bg-elev:#0b0d14;
  --surface:#10131b;
  --surface-2:#151925;
  --surface-3:#1b2030;
  --line:rgba(255,255,255,.075);
  --line-strong:rgba(255,255,255,.14);

  --text:#e9ecf3;
  --text-2:#b6bfd1;
  --text-3:#8b94a8;
  --text-4:#626b7e;

  --cyan:#41e0d0;
  --violet:#8e7df8;
  --amber:#eeb069;
  --rose:#f0709a;
  --grad:linear-gradient(100deg,var(--cyan),var(--violet) 60%,#dd7bf0);

  --r-xs:6px;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-full:999px;

  --wrap:1200px;
  --prose:720px;
  --gutter:28px;

  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 16px 40px -24px rgba(0,0,0,.9);
  --shadow-lg:0 40px 90px -40px rgba(0,0,0,.95);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:rgba(65,224,208,.26)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(780px 460px at 8% -8%,rgba(65,224,208,.075),transparent 62%),
    radial-gradient(820px 520px at 92% 0%,rgba(142,125,248,.09),transparent 64%),
    radial-gradient(1100px 700px at 50% 104%,rgba(221,123,240,.045),transparent 62%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.45;
  background-image:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);
  background-size:72px 72px;
}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
section{position:relative}
.center{text-align:center}
.sec{padding:92px 0}
.sec-tight{padding:60px 0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  background:rgba(7,8,12,.72);
  border-bottom:1px solid transparent;transition:border-color .3s,background .3s;
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(7,8,12,.92)}
.nav{display:flex;align-items:center;gap:26px;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.025em;font-size:15.5px}
.brand .mark{
  width:29px;height:29px;border-radius:8px;display:grid;place-items:center;
  background:var(--grad);color:#06070b;font-size:13.5px;font-weight:800;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 6px 18px -8px rgba(65,224,208,.65);
}
.brand .dot{color:var(--text-4);font-weight:500}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;padding:8px 12px;border-radius:8px;font-size:14px;
  color:var(--text-3);font-weight:500;transition:color .18s,background .18s;
}
.nav-links a:hover{color:var(--text);background:rgba(255,255,255,.045)}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1.5px;
  background:var(--grad);border-radius:2px;
}
.lang{
  display:flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);
  border-radius:var(--r-full);background:rgba(255,255,255,.03);font-size:12px;font-weight:600;
}
.lang a{padding:5px 9px;border-radius:var(--r-full);color:var(--text-4);letter-spacing:.05em}
.lang a.on{background:rgba(255,255,255,.09);color:var(--text)}
.burger{display:none;width:38px;height:38px;border-radius:9px;border:1px solid var(--line);place-items:center}
.burger span{display:block;width:16px;height:1.6px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--text)}
.burger span::before{top:-5px}.burger span::after{top:5px}

/* ---------- hero ---------- */
.hero{padding:80px 0 60px}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:60px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;padding:6px 13px;border-radius:var(--r-full);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--text-2);font-weight:600;
}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 rgba(65,224,208,.7);animation:pulse 2.6s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(65,224,208,0)}100%{box-shadow:0 0 0 0 rgba(65,224,208,0)}}

h1{font-size:clamp(2.3rem,4.4vw,3.55rem);line-height:1.05;letter-spacing:-.045em;margin:24px 0 0;font-weight:800}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:clamp(1rem,1.5vw,1.13rem);color:var(--text-2);max-width:56ch;margin:20px 0 0;line-height:1.62}
.hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:30px}

.btn{
  display:inline-flex;align-items:center;gap:9px;padding:12px 20px;border-radius:var(--r-sm);
  font-weight:600;font-size:14.5px;border:1px solid transparent;white-space:nowrap;
  transition:transform .16s,box-shadow .22s,background .18s,border-color .18s;
}
.btn-primary{background:var(--text);color:#07080c;box-shadow:0 10px 28px -14px rgba(255,255,255,.45)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 36px -16px rgba(255,255,255,.5)}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:rgba(255,255,255,.025)}
.btn-ghost:hover{background:rgba(255,255,255,.06);transform:translateY(-1px)}
.btn-sm{padding:9px 15px;font-size:13.5px}
.btn svg{width:15px;height:15px}

.hero-visual{position:relative}
.hero-visual .frame{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);background:var(--bg-elev);box-shadow:var(--shadow-lg);
}
.hero-visual .frame img{width:100%;height:auto}
.hero-visual .caption{display:flex;gap:7px;flex-wrap:wrap;margin-top:13px}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:var(--r-full);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-size:11.5px;color:var(--text-4);font-family:var(--mono);
}
.chip b{color:var(--text-2);font-weight:500}
.chip .live{width:5px;height:5px;border-radius:50%;background:var(--cyan)}

.stats{display:flex;flex-wrap:wrap;gap:36px;margin-top:42px;padding-top:24px;border-top:1px solid var(--line)}
.stat b{display:block;font-size:1.45rem;letter-spacing:-.03em;font-weight:750;font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:var(--text-4);letter-spacing:.02em}

/* ---------- section headers ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:34px;flex-wrap:wrap}
.sec-head > div{max-width:68ch}
.sec-kicker{
  display:flex;align-items:center;gap:10px;font-size:11.5px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--cyan);font-weight:700;margin:0 0 13px;
}
.sec-kicker::before{content:"";width:22px;height:1px;background:currentColor;opacity:.7}
h2{font-size:clamp(1.6rem,2.9vw,2.25rem);line-height:1.13;letter-spacing:-.035em;margin:0;font-weight:750}
.sec-sub{color:var(--text-2);margin:12px 0 0;max-width:60ch;font-size:15.5px}
h3{font-size:1.2rem;letter-spacing:-.02em;margin:0;font-weight:680}

/* ---------- cards ---------- */
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  position:relative;padding:26px;border-radius:var(--r-md);
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.008));
  transition:transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s,background .22s;
  display:flex;flex-direction:column;overflow:hidden;
}
.card:hover{transform:translateY(-2px);border-color:var(--line-strong);background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.015))}
.card .ico{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(65,224,208,.09);border:1px solid rgba(65,224,208,.2);color:var(--cyan);
}
.card .ico svg{width:18px;height:18px}
.card.violet .ico{background:rgba(142,125,248,.11);border-color:rgba(142,125,248,.24);color:var(--violet)}
.card.amber .ico{background:rgba(238,176,105,.09);border-color:rgba(238,176,105,.22);color:var(--amber)}
.card p{color:var(--text-3);font-size:14.5px;margin:9px 0 0;line-height:1.6}
.card .more{
  margin-top:auto;padding-top:16px;font-size:13.5px;font-weight:600;color:var(--text-2);
  display:flex;align-items:center;gap:7px;transition:gap .18s,color .18s;
}
.card:hover .more{gap:11px;color:var(--cyan)}
.card > .tag{align-self:flex-start}
.tag{
  display:inline-block;padding:3px 9px;border-radius:var(--r-full);font-size:10.5px;font-weight:650;
  letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line-strong);color:var(--text-3);
  background:rgba(255,255,255,.025);
}
.tag.solid{background:rgba(65,224,208,.12);border-color:rgba(65,224,208,.26);color:var(--cyan)}
.meta{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:12px}

.feature-row{
  display:grid;grid-template-columns:52px 1fr;gap:20px;padding:22px 0;
  border-top:1px solid var(--line);align-items:start;
}
.feature-row .n{font-family:var(--mono);font-size:12px;color:var(--cyan);letter-spacing:.08em;padding-top:4px}
.feature-row h3{margin-bottom:6px}
.feature-row p{margin:0;color:var(--text-3);font-size:15px}

/* ---------- article shell ---------- */
.article-hero{padding:52px 0 34px;border-bottom:1px solid var(--line)}
.article-hero .wrap{max-width:1092px}
.breadcrumb{
  display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--text-4);
  letter-spacing:.02em;margin-bottom:18px;flex-wrap:wrap;
}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{opacity:.45}
.article-hero h1{font-size:clamp(1.85rem,3.6vw,2.75rem);margin:14px 0 0;line-height:1.09;max-width:24ch}
.article-hero .lede{margin-top:18px;max-width:66ch}
.article-meta{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:24px;
  font-size:12.5px;color:var(--text-4);font-family:var(--mono);
}
.article-meta .sep{width:3px;height:3px;border-radius:50%;background:var(--text-4);opacity:.6}

.article-body{padding:48px 0 84px}
.article-body .wrap{max-width:1092px}
.art-grid{display:grid;grid-template-columns:minmax(0,720px) 232px;gap:56px;justify-content:center;align-items:start}

/* prose */
.prose{font-size:17.5px;line-height:1.74;color:#d6dceb;min-width:0}
.prose pre,.prose table{max-width:100%}
.prose > * + *{margin-top:20px}
.prose h2{font-size:1.52rem;margin-top:50px;letter-spacing:-.028em;scroll-margin-top:90px}
.prose h2 + p,.prose h2 + ul,.prose h2 + ol{margin-top:14px}
.prose h3{font-size:1.13rem;margin-top:32px;scroll-margin-top:90px}
.prose h4{font-size:.97rem;margin:22px 0 0;color:var(--text);font-weight:680}
.prose p{color:#c4ccdc}
.prose strong{color:#fff;font-weight:640}
.prose em{color:var(--text-2)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(65,224,208,.3);transition:border-color .15s}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul,.prose ol{padding-left:20px;color:#c4ccdc}
.prose li{margin:7px 0}
.prose li::marker{color:var(--text-4)}
.prose hr{border:0;border-top:1px solid var(--line);margin:42px 0}
.prose > p:first-of-type{font-size:18.5px;color:var(--text-2)}

blockquote{
  margin:26px 0;padding:16px 22px;border-left:2px solid var(--cyan);
  background:rgba(65,224,208,.05);border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:#dbe3f0;font-size:16.5px;
}
blockquote p{margin:0;color:inherit}

code{
  font-family:var(--mono);font-size:.85em;padding:2px 5px;border-radius:4px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);color:#bff3ee;
}
pre{
  position:relative;background:#090c13;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:18px 20px;overflow-x:auto;font-size:13px;line-height:1.66;
}
pre code{background:none;border:0;padding:0;color:#cfd7e6;font-size:inherit}
pre[data-lang]::before{
  content:attr(data-lang);position:absolute;top:0;right:0;padding:4px 10px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-4);border-left:1px solid var(--line);border-bottom:1px solid var(--line);
  border-radius:0 var(--r-sm) 0 6px;background:rgba(255,255,255,.02);
}

/* notes */
.note{
  display:flex;gap:13px;padding:18px 20px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.025);margin:26px 0;
  border-left:2px solid var(--text-4);
}
.note .ni{flex:0 0 auto;width:18px;color:var(--text-3);margin-top:2px}
.note p{margin:0;font-size:15px;color:#cbd3e2}
.note p + p{margin-top:8px}
.note strong{color:#fff}
.note.info{border-left-color:var(--cyan);background:rgba(65,224,208,.045)}
.note.info .ni{color:var(--cyan)}
.note.warn{border-left-color:var(--amber);background:rgba(238,176,105,.055)}
.note.warn .ni{color:var(--amber)}
.note.danger{border-left-color:#f2557b;background:rgba(242,85,123,.055)}
.note.danger .ni{color:#f2557b}
.note.tip{border-left-color:var(--violet);background:rgba(142,125,248,.05)}
.note.tip .ni{color:var(--violet)}

/* figures */
figure{margin:28px 0}
figure img,figure svg{width:100%;height:auto;border-radius:var(--r-sm);border:1px solid var(--line);background:#0a0d14}
figcaption{
  font-size:12.5px;color:var(--text-4);margin-top:10px;line-height:1.55;
  padding-left:12px;border-left:1px solid var(--line-strong);
}
figcaption b{color:var(--text-2);font-weight:600}
.figure-wide{margin-inline:-40px}

/* steps */
.steps{margin:24px 0;counter-reset:step;display:flex;flex-direction:column}
.step{position:relative;padding:16px 0 16px 44px;border-top:1px solid var(--line)}
.step:last-child{border-bottom:1px solid var(--line)}
.step::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:0;top:14px;width:25px;height:25px;border-radius:50%;
  display:grid;place-items:center;font-size:11px;font-weight:700;
  font-family:var(--mono);color:var(--cyan);
  border:1px solid rgba(65,224,208,.32);background:rgba(65,224,208,.07);
}
.step h4{margin:0 0 4px;font-size:15.5px;font-weight:650;color:#fff}
.step p{margin:0;font-size:14.5px;color:var(--text-3);line-height:1.6}
.step p + p{margin-top:6px}

/* spec grid */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden;margin:24px 0}
.spec-grid > div{background:var(--bg-elev);padding:13px 16px}
.spec-grid dt{font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-4);font-weight:600}
.spec-grid dd{margin:4px 0 0;font-size:14px;color:var(--text);font-family:var(--mono)}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-sm);margin:24px 0;background:var(--bg-elev)}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{
  background:rgba(255,255,255,.035);font-weight:650;color:#fff;font-size:11px;
  letter-spacing:.07em;text-transform:uppercase;white-space:nowrap;
}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:rgba(255,255,255,.018)}
td{color:#c4ccdc}
td code{font-size:12px}
caption{caption-side:top;text-align:left;padding:10px 14px;font-size:12px;color:var(--text-4);border-bottom:1px solid var(--line)}

/* part divider */
.part{
  display:flex;align-items:center;gap:14px;margin:54px 0 6px;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);font-weight:700;
}
.part::after{content:"";flex:1;height:1px;background:linear-gradient(90deg,rgba(65,224,208,.4),transparent)}

/* TOC */
.toc{position:sticky;top:94px;font-size:13px;max-height:calc(100vh - 128px);overflow-y:auto;padding-right:4px}
.toc h4{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-4);margin:0 0 12px;font-weight:700}
.toc a{
  display:block;padding:5px 0 5px 11px;color:var(--text-4);line-height:1.4;
  border-left:1px solid var(--line);transition:color .16s,border-color .16s;
}
.toc a:hover{color:var(--text-2)}
.toc a.on{color:var(--cyan);border-left-color:var(--cyan)}
.toc a.sub{padding-left:22px;font-size:12.2px}
.toc::-webkit-scrollbar{width:4px}
.toc::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:2px}

#progress{position:fixed;top:0;left:0;height:2px;background:var(--grad);width:0;z-index:99;transition:width .08s linear}

/* author / next read */
.author{
  display:flex;gap:15px;align-items:center;padding:18px;margin-top:42px;
  border:1px solid var(--line);border-radius:var(--r-md);background:rgba(255,255,255,.02);
}
.author .av{
  width:42px;height:42px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  background:var(--grad);color:#06070b;font-weight:800;font-size:15px;
}
.author p{margin:0;font-size:13px;color:var(--text-3);line-height:1.5}
.author b{display:block;color:#fff;font-size:14px;margin-bottom:2px}
.next-read{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:30px}
.next-read a{padding:17px;border:1px solid var(--line);border-radius:var(--r-sm);background:rgba(255,255,255,.02);transition:border-color .2s,background .2s}
.next-read a:hover{border-color:var(--line-strong);background:rgba(255,255,255,.045)}
.next-read .k{font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-4);font-weight:700}
.next-read h4{margin:7px 0 0;font-size:14.5px;font-weight:650;color:var(--text)}
.next-read p{margin:5px 0 0;font-size:12.5px;color:var(--text-3)}

/* ---------- about / cta ---------- */
.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:52px;align-items:center}
.portrait{
  aspect-ratio:1/1;border-radius:var(--r-lg);border:1px solid var(--line-strong);
  background:
    radial-gradient(circle at 30% 25%,rgba(65,224,208,.2),transparent 55%),
    radial-gradient(circle at 72% 78%,rgba(142,125,248,.22),transparent 55%),#0a0d14;
  display:grid;place-items:center;box-shadow:var(--shadow-lg);overflow:hidden;
}
.cta-band{
  border:1px solid var(--line-strong);border-radius:var(--r-lg);padding:46px;
  background:linear-gradient(135deg,rgba(65,224,208,.07),rgba(142,125,248,.07) 55%,rgba(221,123,240,.04));
  position:relative;overflow:hidden;
}
.cta-band h2{max-width:22ch}
.contact-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:10px;margin-top:24px}
.contact-list a{
  display:flex;align-items:center;gap:11px;padding:13px 16px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:rgba(255,255,255,.025);font-size:13.5px;transition:.18s;
}
.contact-list a:hover{background:rgba(255,255,255,.06);border-color:var(--line-strong)}
.contact-list .k{margin-left:auto;color:var(--text-4);font-size:11px;font-family:var(--mono)}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:46px 0 34px;margin-top:20px;background:rgba(0,0,0,.25)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.foot-col h5{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-4);margin:0 0 11px;font-weight:700}
.foot-col a{display:block;font-size:13.5px;color:var(--text-3);padding:4px 0;transition:color .16s}
.foot-col a:hover{color:var(--cyan)}
.foot-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:34px;
  padding-top:20px;border-top:1px solid var(--line);font-size:12px;color:var(--text-4);
}

/* ---------- reveal ---------- */
.rv{transition:opacity .65s cubic-bezier(.2,.7,.3,1),transform .65s cubic-bezier(.2,.7,.3,1)}
html.js .rv{opacity:0;transform:translateY(14px)}
html.js .rv.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1060px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:620px}
  .grid-4{grid-template-columns:1fr 1fr}
}
@media(max-width:980px){
  .art-grid{grid-template-columns:minmax(0,1fr)}
  .prose{min-width:0}
  .toc{display:none}
  .about-grid{grid-template-columns:1fr;gap:30px}
  .grid-3{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .figure-wide{margin-inline:0}
}
@media(max-width:760px){
  body{font-size:16.5px}
  :root{--gutter:20px}
  .nav-links{
    position:fixed;inset:70px 0 auto;flex-direction:column;align-items:stretch;gap:2px;
    background:#090b11;padding:16px 20px 24px;border-bottom:1px solid var(--line);
    box-shadow:0 30px 50px -24px #000;
    transform:translateY(-120%);transition:transform .34s cubic-bezier(.2,.7,.3,1);
  }
  .nav-links.open{transform:none}
  .nav-links a{padding:13px 8px;font-size:16px}
  .nav-links a.active::after{display:none}
  .burger{display:grid}
  .lang{margin-left:auto}
  .hero{padding:40px 0 38px}
  .sec{padding:58px 0}
  .grid-2,.grid-3,.grid-4,.next-read{grid-template-columns:1fr}
  .stats{gap:20px}
  .stat b{font-size:1.25rem}
  .cta-band{padding:26px 20px;border-radius:var(--r-md)}
  .article-hero{padding:34px 0 22px}
  .article-body{padding:30px 0 54px}
  .prose{font-size:16.5px}
  .prose h2{margin-top:36px}
  .spec-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  /* diagrams stay legible: swipe horizontally instead of shrinking to 5px text */
  figure{overflow-x:auto;overscroll-behavior-x:contain}
  figure img,figure svg{min-width:560px}
  figcaption{min-width:560px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  html.js .rv{opacity:1;transform:none}
}