/* ============================================
   Techno Karan — modern tech blog
   ============================================ */
:root{
  --bg:#f7f8fb; --card:#ffffff; --ink:#141a24; --muted:#5b6675;
  --brand:#2f5cff; --brand-2:#7b3bff; --chip:#eef1ff; --chip-ink:#2f4bd6;
  --line:#e6e9f0; --r:16px;
  --shadow:0 10px 30px -14px rgba(20,26,36,.16);
  --display:"Space Grotesk",Inter,sans-serif;
  --body:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);
  line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:min(1160px,92vw);margin-inline:auto}
.wrap-n{width:min(760px,92vw);margin-inline:auto}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0}
.brand{display:flex;flex-direction:column;line-height:1.05;text-decoration:none}
.brand b{font-family:var(--display);font-size:1.45rem;color:var(--ink);letter-spacing:-.02em}
.brand b span{background:linear-gradient(90deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.brand em{font-style:normal;font-size:.62rem;letter-spacing:.3em;text-transform:uppercase;color:var(--muted)}
.menu{display:flex;gap:.15rem;flex-wrap:wrap}
.menu a{font-size:.82rem;font-weight:500;color:var(--muted);padding:.5rem .75rem;border-radius:10px}
.menu a:hover{color:var(--ink);background:var(--chip);text-decoration:none}
.menu a.active{color:var(--chip-ink);background:var(--chip);font-weight:600}
.burger{display:none;background:none;border:0;cursor:pointer;padding:.4rem}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.3s}

/* home hero */
.home-hero{padding:clamp(2.5rem,6vw,4.5rem) 0 1rem;text-align:left}
.home-hero h1{font-family:var(--display);font-size:clamp(2rem,5vw,3.4rem);
  letter-spacing:-.03em;margin:.3rem 0 .2rem}
.home-hero p{color:var(--muted);margin:0;font-size:1.05rem}

/* grid + cards */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem;padding:2rem 0 4rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;display:flex;flex-direction:column;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card.big{grid-column:span 3;flex-direction:row;align-items:stretch}
.card.big .thumb{flex:1.2}
.card.big .cbody{flex:1;justify-content:center;padding:2rem}
.card.big h2{font-size:clamp(1.3rem,2.6vw,1.9rem)}
.thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(120deg,var(--brand),var(--brand-2))}
.card.big .thumb{aspect-ratio:auto;min-height:280px}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .thumb img{transform:scale(1.05)}
.noimg{display:grid;place-items:center;height:100%;color:#fff;
  font-family:var(--display);font-size:2.6rem;letter-spacing:.05em}
.cbody{padding:1.15rem 1.25rem 1.3rem;display:flex;flex-direction:column;gap:.45rem}
.chip{display:inline-block;align-self:flex-start;background:var(--chip);color:var(--chip-ink);
  font-size:.68rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  padding:.28rem .7rem;border-radius:999px;text-decoration:none}
a.chip:hover{text-decoration:none;filter:brightness(.96)}
.cbody h2{font-family:var(--display);font-size:1.12rem;line-height:1.35;margin:0;letter-spacing:-.01em}
.cbody h2 a{color:var(--ink)}
.cbody h2 a:hover{color:var(--brand);text-decoration:none}
.cbody p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.55}
.cbody time{color:var(--muted);font-size:.78rem;margin-top:auto}

/* article */
.post-head{padding:clamp(2.2rem,5vw,3.5rem) 0 1.2rem;text-align:center}
.post-head h1{font-family:var(--display);font-size:clamp(1.7rem,4.4vw,2.7rem);
  line-height:1.2;letter-spacing:-.02em;margin:.9rem 0 .6rem}
.post-head .meta{color:var(--muted);font-size:.9rem;margin:0}
img.feat{border-radius:var(--r);box-shadow:var(--shadow);aspect-ratio:16/9;object-fit:cover;width:100%}
.post-body{padding:2rem 0 4rem;font-size:1.05rem}
.post-body p{margin:1.1em 0}
.post-body h2{font-family:var(--display);font-size:1.55rem;letter-spacing:-.01em;
  margin:2.2em 0 .6em;scroll-margin-top:90px}
.post-body h3{font-family:var(--display);font-size:1.2rem;margin:1.8em 0 .5em;scroll-margin-top:90px}
.post-body img{border-radius:12px;margin:1.4em auto}
.post-body ul,.post-body ol{padding-left:1.4em}
.post-body li{margin:.45em 0}
.post-body blockquote{border-left:4px solid var(--brand);margin:1.5em 0;padding:.4em 0 .4em 1.2em;
  color:var(--muted);background:var(--chip);border-radius:0 10px 10px 0}
.post-body table{border-collapse:collapse;width:100%;font-size:.95rem;margin:1.4em 0}
.post-body th,.post-body td{border:1px solid var(--line);padding:.55em .8em;text-align:left}
.post-body th{background:var(--chip)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:1.2rem 1.4rem;margin:0 0 2rem}
.toc b{font-family:var(--display);font-size:1rem}
.toc ol{margin:.6rem 0 0;padding-left:1.2rem}
.toc li{margin:.3rem 0;font-size:.92rem}
.toc li.lv-h3{margin-left:1rem;list-style:circle}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--brand)}

/* footer */
.site-footer{background:#10151d;color:#aeb6c2;margin-top:auto}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;padding:3rem 0 1.5rem}
.foot .brand b{color:#fff}
.foot p{font-size:.9rem}
.fnav{display:flex;flex-direction:column;gap:.35rem}
.fnav h4{font-family:var(--display);color:#fff;margin:0 0 .4rem;font-size:1rem}
.fnav a{color:#aeb6c2;font-size:.9rem}
.fnav a:hover{color:#fff}
.copy{display:flex;justify-content:space-between;gap:.6rem;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);padding:1.2rem 0;font-size:.8rem}
.copy a{color:#aeb6c2}

/* responsive */
@media (max-width:960px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .card.big{grid-column:span 2;flex-direction:column}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .grid{grid-template-columns:1fr}
  .card.big{grid-column:span 1}
  .menu{position:fixed;inset:0 0 0 auto;width:min(76vw,300px);background:#fff;
    flex-direction:column;padding:4.5rem 1.2rem 2rem;gap:.2rem;
    transform:translateX(100%);transition:transform .3s;box-shadow:var(--shadow);z-index:60}
  .menu.open{transform:none}
  .menu a{padding:.85rem .9rem;border-bottom:1px solid var(--line)}
  .burger{display:block;z-index:70}
  .burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.open span:nth-child(2){opacity:0}
  .burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-scrim{position:fixed;inset:0;background:rgba(16,21,29,.45);z-index:55;
    opacity:0;pointer-events:none;transition:.3s}
  .nav-scrim.show{opacity:1;pointer-events:auto}
  .foot{grid-template-columns:1fr}
  .copy{flex-direction:column}
}