/* ============================================================
   Misbah Al Mamun — shared stylesheet
   paper  #EFECE4  warm bone ground
   ink    #1A1A18  primary text
   indigo #24406B  structural accent — rules, links, pitch contour
   brass  #B0802A  swara markers, dataset figures, eyebrows
   moss   #4A5D4E  "under review" status
   ============================================================ */
:root{
  --paper:#F5F1E8;
  --paper-2:#EAE3D4;
  --paper-3:#fffdf9;
  --ink:#17181D;
  --ink-80:rgba(23,24,29,.84);
  --ink-60:rgba(23,24,29,.62);
  --ink-40:rgba(23,24,29,.42);
  --ink-20:rgba(23,24,29,.18);
  --rule:rgba(23,24,29,.12);
  --indigo:#224678;
  --indigo-soft:#e9eef8;
  --brass:#B07A28;
  --moss:#46614F;
  --shadow:0 18px 42px rgba(27,32,46,.12);
  --shadow-soft:0 8px 20px rgba(27,32,46,.08);

  --display:"Bricolage Grotesque", ui-sans-serif, system-ui, sans-serif;
  --body:"Newsreader", Georgia, "Times New Roman", serif;
  --mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap:1060px;
  --gut:clamp(20px,5vw,60px);
}

body[data-theme="dark"] {
  --paper:#0d121a;
  --paper-2:#101a28;
  --paper-3:#132030;
  --ink:#edf3ff;
  --ink-80:rgba(237,243,255,.9);
  --ink-60:rgba(237,243,255,.72);
  --ink-40:rgba(237,243,255,.52);
  --ink-20:rgba(237,243,255,.18);
  --rule:rgba(167,185,212,.18);
  --indigo:#93b5ff;
  --indigo-soft:rgba(147,181,255,.12);
  --brass:#f6c76d;
  --moss:#a6d4b0;
  --shadow:0 22px 44px rgba(2,6,12,.46);
  --shadow-soft:0 10px 22px rgba(2,6,12,.28);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:
    radial-gradient(circle at top left, rgba(176,122,40,.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(34,70,120,.1), transparent 30%),
    var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:clamp(16px,1.02vw + 13px,18px);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .28s ease,color .28s ease;
}
a{color:var(--indigo);text-decoration:none;border-bottom:1px solid rgba(34,70,120,.32);
  transition:border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease}
a:hover{border-bottom-color:var(--indigo);transform:translateY(-1px)}
a:focus-visible,button:focus-visible{outline:2px solid var(--indigo);outline-offset:3px;border-radius:2px}
::selection{background:rgba(176,122,40,.28)}
img{max-width:100%;display:block}

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

/* ---------------- top bar ---------------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(245,241,232,.82);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--rule);box-shadow:0 1px 0 rgba(17,18,22,.03)}
body[data-theme="dark"] .topbar{background:rgba(13,18,26,.76)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:700;letter-spacing:-.015em;font-size:.98rem;border:0;white-space:nowrap;color:var(--ink);transition:color .18s ease,transform .18s ease}
.brand:hover{color:var(--indigo);transform:translateY(-1px)}
.navlinks{display:flex;gap:clamp(8px,1.5vw,20px);align-items:center;flex-wrap:wrap;padding:8px 0;flex:1 1 auto;justify-content:center}
.navlinks a{font-family:var(--mono);font-size:.68rem;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-60);border:0;padding:6px 0;border-bottom:1.5px solid transparent;position:relative;white-space:nowrap}
.navlinks a::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1.5px;background:var(--brass);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.navlinks a:hover{color:var(--ink)}
.navlinks a:hover::after,.navlinks a[aria-current="page"]::after{transform:scaleX(1)}
.navlinks a[aria-current="page"]{color:var(--ink);border-bottom-color:transparent}
.theme-toggle{appearance:none;border:1px solid var(--rule);background:var(--paper-3);color:var(--ink);width:40px;height:40px;border-radius:50%;cursor:pointer;box-shadow:var(--shadow-soft);transition:all .2s ease;display:grid;place-items:center;padding:0;flex-shrink:0}
.theme-toggle svg{width:18px;height:18px;display:block}
.theme-toggle:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(34,70,120,.12);border-color:rgba(34,70,120,.28)}
body[data-theme="dark"] .theme-toggle{background:var(--paper-2)}
.header-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{display:none;appearance:none;border:1px solid var(--rule);background:var(--paper-3);color:var(--ink);width:40px;height:40px;border-radius:50%;cursor:pointer;box-shadow:var(--shadow-soft);padding:0;position:relative;transition:all .2s ease}
.menu-toggle span{position:absolute;left:12px;right:12px;height:2px;border-radius:999px;background:currentColor;transition:transform .2s ease,opacity .2s ease,top .2s ease}
.menu-toggle span:nth-child(1){top:14px}
.menu-toggle span:nth-child(2){top:19px}
.menu-toggle span:nth-child(3){top:24px}
.menu-toggle[aria-expanded="true"] span:nth-child(1){top:19px;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){top:19px;transform:rotate(-45deg)}
@media (max-width:760px){
  .topbar .wrap{position:relative;padding:10px 16px 12px;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:nowrap}
  .brand{font-size:.94rem;white-space:nowrap}
  .navlinks{display:none;position:absolute;top:calc(100% + 8px);right:16px;left:auto;width:min(210px, calc(100vw - 32px));padding:8px 10px;background:rgba(245,241,232,.96);border:1px solid var(--rule);border-radius:12px;box-shadow:var(--shadow-soft);z-index:60}
  body[data-theme="dark"] .navlinks{background:rgba(13,18,26,.96)}
  .navlinks.open{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0}
  .navlinks a{font-size:.56rem;letter-spacing:.06em;padding:9px 8px;white-space:normal;line-height:1.3;display:block;width:100%;border-bottom:1px solid var(--rule);border-radius:6px}
  .navlinks a:last-child{border-bottom:none}
  .navlinks a:hover{background:rgba(34,70,120,.05)}
  .header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
  .menu-toggle{display:block}
  .theme-toggle{margin-left:0}
  .hero h1{font-size:clamp(2.25rem,14vw,4.1rem)}
  .tagline{font-size:.72rem;line-height:1.7}
  .tagline span{white-space:normal;display:inline-block}
  .tagline i{display:none}
  .lede{font-size:1rem}
  .portrait{max-width:180px;margin:0 auto}
  .chips{gap:8px}
  .chip{padding:8px 10px}
}

@media (max-width:900px) and (orientation: landscape){
  .topbar .wrap{padding-top:10px;padding-bottom:12px}
  .navlinks a{font-size:.58rem}
}

@media (max-width:480px){
  :root{--gut:16px}
  .wrap{padding:0 var(--gut)}
  .topbar .wrap{padding-top:12px;padding-bottom:10px}
  .brand{font-size:.88rem}
  .navlinks a{font-size:.54rem}
  .hero{padding-top:22px}
  .herogrid{gap:18px}
  .hero h1{font-size:clamp(2.2rem,18vw,3.25rem);line-height:.94;letter-spacing:-.04em}
  .tagline{font-size:.68rem;letter-spacing:0}
  .tagline span{display:block}
  .lede{font-size:.96rem;line-height:1.55}
  .chips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .chip{justify-content:center;width:100%}
  .portrait{max-width:150px}
  .sighead{font-size:.62rem;letter-spacing:.08em}
  .newsitem{padding:12px 10px}
}

/* ---------------- page head ---------------- */
.pagehead{padding:clamp(38px,6vw,72px) 0 clamp(20px,3vw,30px)}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brass);margin:0 0 14px}
h1{font-family:var(--display);font-weight:800;letter-spacing:-.032em;line-height:.98;
  font-size:clamp(2.1rem,5.4vw,3.4rem);margin:0 0 16px}
.pagehead p{max-width:66ch;margin:0;color:var(--ink-60)}

/* ---------------- home hero ---------------- */
.hero{padding:clamp(40px,7vw,88px) 0 clamp(26px,3vw,38px)}
.herogrid{display:grid;grid-template-columns:minmax(0,1fr) clamp(160px,22vw,220px);gap:clamp(26px,4vw,52px);align-items:center}
@media (max-width:760px){.herogrid{grid-template-columns:1fr}.portrait{max-width:180px}}
.hero h1{font-size:clamp(2.7rem,7.8vw,5rem);line-height:.9;margin-bottom:14px;letter-spacing:-.055em}
.tagline{display:flex;flex-wrap:wrap;align-items:center;column-gap:6px;row-gap:2px;font-family:var(--mono);font-size:.79rem;letter-spacing:.02em;color:var(--ink-60);
  margin:0 0 22px;line-height:1.9}
.tagline span{white-space:normal}
.tagline i{font-style:normal;color:var(--ink-40)}
.lede{font-size:clamp(1.04rem,1.4vw,1.26rem);max-width:58ch;margin:0 0 26px;color:var(--ink-80)}
.lede em{font-style:italic;color:var(--indigo);font-weight:600}

.portrait{position:relative;aspect-ratio:1/1.12;background:linear-gradient(180deg,var(--paper-2),var(--paper-3));
  border:1px solid var(--rule);overflow:hidden;border-radius:20px;box-shadow:var(--shadow);isolation:isolate}
.portrait::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(34,70,120,.18),transparent 45%,rgba(176,122,40,.12));z-index:1;pointer-events:none}
.portrait img{width:100%;height:100%;object-fit:cover;filter:saturate(1.02) contrast(1.02)}
.monogram{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--display);
  font-weight:800;font-size:3.2rem;letter-spacing:-.04em;color:var(--ink-40);z-index:0}
@media (max-width:760px){
  .herogrid{position:relative}
  .portrait{position:absolute;top:48px;right:0;width:112px;max-width:none;aspect-ratio:1;border-radius:14px}
  .hero h1{max-width:calc(100% - 126px);padding-right:0}
}
@media (max-width:480px){
  .portrait{top:46px;width:96px}
}

/* ---------------- chips ---------------- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{font-family:var(--mono);font-size:.73rem;padding:9px 12px;border:1px solid var(--rule);
  border-radius:999px;color:var(--ink);background:rgba(255,255,255,.18);box-shadow:var(--shadow-soft);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;display:inline-flex;align-items:center;gap:8px;line-height:1}
.chip:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);transform:translateY(-2px);box-shadow:0 12px 24px rgba(15,22,34,.16)}
.chip.solid{background:linear-gradient(135deg,var(--indigo),#355f98);color:#fff;border-color:transparent}
.chip.solid:hover{background:linear-gradient(135deg,#1a3765,#203f6a);border-color:transparent}
.chip svg{width:15px;height:15px;display:block;flex-shrink:0}
.chip img{width:15px;height:15px;display:block;flex-shrink:0}
@media (max-width:760px){
  .chips{gap:8px}
  .chip{padding:9px 10px}
}

/* ---------------- signature: swara segmentation ---------------- */
.signature{padding:clamp(8px,2vw,20px) 0 clamp(30px,4vw,52px)}
.sigframe{border:1px solid var(--rule);padding:clamp(15px,2.2vw,24px);
  background:linear-gradient(180deg,var(--paper-2),rgba(231,227,216,.3))}
.sighead{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.69rem;letter-spacing:.13em;text-transform:uppercase;
  color:var(--ink-60);margin-bottom:12px}
.sighead b{color:var(--ink);font-weight:500}
.sigsvg{display:block;width:100%;height:auto}
.contour{fill:none;stroke:var(--indigo);stroke-width:2.1;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:5200;stroke-dashoffset:5200;animation:draw 3.4s cubic-bezier(.32,.72,.28,1) .25s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.bound{stroke:var(--brass);stroke-width:1;stroke-dasharray:3 4;opacity:0;animation:pop .5s ease forwards}
.swlabel{font-family:var(--mono);font-size:11px;fill:var(--ink-60);letter-spacing:.1em;opacity:0;
  animation:pop .5s ease forwards}
.swlabel.on{fill:var(--brass)}
@keyframes pop{to{opacity:1}}
.axis{stroke:var(--rule);stroke-width:1}

/* ---------------- sections ---------------- */
section{padding:clamp(34px,5vw,58px) 0;border-top:1px solid var(--rule)}
section.first{border-top:0}
.sechead{display:flex;align-items:baseline;gap:14px;margin:0 0 24px;flex-wrap:wrap}
.sechead h2{font-family:var(--display);font-weight:700;letter-spacing:-.02em;
  font-size:clamp(1.3rem,2.3vw,1.75rem);margin:0}
.count{font-family:var(--mono);font-size:.71rem;color:var(--ink-40);letter-spacing:.1em}
.prose{max-width:68ch}
.prose p{margin:0 0 14px}
.prose p:last-child{margin-bottom:0}
.interests{border-left:2px solid var(--brass);padding-left:18px;margin-top:20px;max-width:68ch;background:linear-gradient(90deg,rgba(176,122,40,.06),transparent);border-radius:0 8px 8px 0;padding-top:8px;padding-bottom:8px}
.interests strong{font-family:var(--display);font-weight:600}

/* ---------------- item lists ---------------- */
.items{display:flex;flex-direction:column}
.item{padding:20px 0;border-top:1px solid var(--rule);transition:transform .2s ease,background-color .2s ease,border-color .2s ease}
.item:first-child{border-top:0;padding-top:2px}
.item:hover{transform:translateY(-2px);background:linear-gradient(90deg,rgba(34,70,120,.03),transparent);border-color:rgba(34,70,120,.18)}
.item h3{font-family:var(--display);font-weight:600;font-size:1.05rem;line-height:1.35;
  letter-spacing:-.012em;margin:0 0 6px}
.meta{font-family:var(--mono);font-size:.74rem;color:var(--ink-60);margin:0 0 8px;line-height:1.7}
.meta .me{color:var(--ink);font-weight:700}
.desc{margin:0;max-width:74ch}
.links{margin-top:10px;display:flex;flex-wrap:wrap;gap:8px 16px}
.links a{font-family:var(--mono);font-size:.73rem}

.tag{display:inline-block;vertical-align:2px;margin-left:9px;font-family:var(--mono);font-size:.61rem;
  letter-spacing:.1em;text-transform:uppercase;padding:3px 8px;border-radius:3px;
  font-weight:500;white-space:nowrap}
.tag.pub{background:rgba(36,64,107,.12);color:var(--indigo)}
.tag.rev{background:rgba(74,93,78,.14);color:var(--moss)}
.tag.wip{background:rgba(176,128,42,.16);color:#8A6320}

/* ---------------- news feed ---------------- */
.news{display:flex;flex-direction:column}
.newsitem{display:grid;grid-template-columns:118px minmax(0,1fr);gap:20px;
  padding:15px 16px;border-top:1px solid var(--rule);border-radius:12px;transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease}
.newsitem:first-child{border-top:0}
.newsitem:hover{transform:translateX(4px);background:rgba(34,70,120,.03);box-shadow:var(--shadow-soft)}
.newsdate{font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;color:var(--brass);
  padding-top:3px;white-space:nowrap}
.newsbody{margin:0;font-size:.98rem;line-height:1.55}
.newsbody em{color:var(--ink-60)}
@media (max-width:620px){
  .newsitem{grid-template-columns:1fr;gap:3px}
  .newsdate{padding-top:0}
}
.olddated{display:none}
.olddated.show{display:grid}
.morebtn{margin-top:18px;font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;
  text-transform:uppercase;background:none;border:1px solid var(--rule);color:var(--ink-60);
  padding:9px 16px;cursor:pointer;transition:.18s}
.morebtn:hover{border-color:var(--ink);color:var(--ink)}

/* ---------------- datasets ---------------- */
.data{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1px;
  background:var(--rule);border:1px solid var(--rule);border-radius:18px;overflow:hidden}
.card{background:linear-gradient(180deg,var(--paper-3),var(--paper));padding:24px 22px 26px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-soft)}
.figure{font-family:var(--display);font-weight:800;font-size:clamp(2rem,4.2vw,2.8rem);line-height:1;
  letter-spacing:-.035em;color:var(--brass);margin:0 0 4px}
.figure small{color:var(--ink-40);font-size:.5em;font-weight:500}
.figlabel{font-family:var(--mono);font-size:.67rem;letter-spacing:.13em;text-transform:uppercase;
  color:var(--ink-40);margin:0 0 14px}
.card h3{font-family:var(--display);font-weight:600;font-size:1rem;margin:0 0 7px}
.card p{margin:0;font-size:.94rem;color:var(--ink-60)}

/* ---------------- skills / columns ---------------- */
.skills,.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:24px 44px}
.skillrow h4,.cols h4{font-family:var(--mono);font-size:.69rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brass);margin:0 0 11px;font-weight:500}
.tokens{display:flex;flex-wrap:wrap;gap:6px}
.token{font-family:var(--mono);font-size:.74rem;padding:4px 9px;border:1px solid var(--rule);
  background:var(--paper-2)}
.cols ul{margin:0;padding:0;list-style:none}
.cols li{padding:9px 0;border-top:1px solid var(--rule);font-size:.94rem;line-height:1.5}
.cols li:first-child{border-top:0;padding-top:0}
.when{display:block;font-family:var(--mono);font-size:.69rem;color:var(--ink-40);margin-top:3px}

/* ---------------- education ---------------- */
.eduhead{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;
  margin-bottom:8px}
.eduhead h3{font-family:var(--display);font-weight:700;font-size:1.12rem;margin:0}
.grades{font-family:var(--mono);font-size:.77rem;color:var(--ink-60)}
.thesis{border-left:2px solid var(--brass);padding-left:18px;max-width:78ch;margin-top:18px}
.thesis .t{font-style:italic}

footer{border-top:1px solid var(--rule);padding:32px 0 50px;margin-top:10px}
.page-links{padding:26px 0 10px;border-top:1px solid var(--rule)}
.page-links nav{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.page-links a{display:inline-flex;align-items:center;font-family:var(--mono);font-size:.68rem;letter-spacing:.04em;color:var(--ink);border:1px solid rgba(34,70,120,.28);border-radius:6px;padding:8px 12px;background:var(--paper-3);box-shadow:0 3px 10px rgba(27,32,46,.08);transition:transform .18s ease,background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease}
.page-links a:hover{color:var(--paper);background:var(--indigo);border-color:var(--indigo);transform:translateY(-1px)}
.foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.71rem;color:var(--ink-40);letter-spacing:.03em;align-items:center}
.foot a{color:var(--ink-60);border:0}
.foot a:hover{color:var(--ink)}
.social-strip{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:8px}
.social-strip a{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--paper-2);border:1px solid var(--rule);color:var(--ink);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;background-image:linear-gradient(180deg,rgba(255,255,255,.15),transparent)}
.social-strip a:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft);border-color:rgba(34,70,120,.3)}
.social-strip svg{width:15px;height:15px;display:block}
.social-strip img{width:15px;height:15px;display:block}
body[data-theme="dark"] .chip img,body[data-theme="dark"] .social-strip img{filter:invert(1)}
@media (max-width:620px){
  .page-links{padding-top:22px}
  .page-links nav{gap:6px}
  .page-links a{font-size:.62rem;padding:7px 10px}
  .foot{flex-direction:column;align-items:flex-start}
  .social-strip{justify-content:flex-start}
}

/* ---------------- reveal ---------------- */
.reveal{opacity:0;transform:translateY(14px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.68,.3,1)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .contour{animation:none;stroke-dashoffset:0}
  .bound,.swlabel{animation:none;opacity:1}
  .reveal{opacity:1 !important;transform:none !important;transition:none}
}