/* ===== Munjiba Israk — portfolio styles ===== */
:root{
  --bg:#F7F6F1; --surface:#FFFFFF; --soft:#EFEEE6; --ink:#14211E; --muted:#5B6864; --line:#E0DFD6;
  --green:#14302A; --green-2:#1E443B; --green-3:#2C5A4E; --on-dark:#EEF2EE; --on-dark-mute:#A9BDB5;
  --gold:#E3A82B; --gold-deep:#A87512; --gold-soft:#FBEFD2; --terra:#C8553D; --sky:#3D6E9E; --sky-soft:#E3ECF5; --leaf-soft:#E2EEE6;
  --serif:"Instrument Serif","Iowan Old Style","Palatino Linotype",Georgia,serif;
  --sans:"Hind Siliguri","Noto Sans Bengali","Segoe UI",system-ui,-apple-system,sans-serif;
  --bn:"Tiro Bangla","Noto Serif Bengali","Hind Siliguri",serif;
  --r:20px; --shadow:0 1px 2px rgba(20,33,30,.06),0 18px 40px -22px rgba(20,33,30,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0F1614; --surface:#16201D; --soft:#1A2522; --ink:#E9EEEB; --muted:#9DAEA8; --line:#26332F;
  --green:#0B1311; --green-2:#13201C; --green-3:#1F3A33; --gold-soft:#33291A; --sky-soft:#1A2733; --leaf-soft:#18271F;
  --shadow:0 1px 2px rgba(0,0,0,.35),0 20px 44px -24px rgba(0,0,0,.8); color-scheme:dark;
}}
:root[data-theme="dark"]{
  --bg:#0F1614; --surface:#16201D; --soft:#1A2522; --ink:#E9EEEB; --muted:#9DAEA8; --line:#26332F;
  --green:#0B1311; --green-2:#13201C; --green-3:#1F3A33; --gold-soft:#33291A; --sky-soft:#1A2733; --leaf-soft:#18271F;
  --shadow:0 1px 2px rgba(0,0,0,.35),0 20px 44px -24px rgba(0,0,0,.8); color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{height:auto;scroll-behavior:smooth;scroll-padding-top:calc(env(safe-area-inset-top,0px) + 84px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:1.0625rem;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:400;text-wrap:balance}
p{text-wrap:pretty}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}
.wrap{width:min(1200px,100% - 3rem);margin-inline:auto}
.skip{position:absolute;left:1rem;top:-60px;z-index:200;background:var(--ink);color:var(--bg);padding:.6rem 1rem;border-radius:8px}
.skip:focus{top:1rem}

/* progress */
.progress{position:fixed;top:env(safe-area-inset-top,0px);left:0;height:3px;width:100%;transform-origin:left;transform:scaleX(0);background:linear-gradient(90deg,var(--gold),var(--terra));z-index:120}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.85rem 1.4rem;border-radius:999px;font-weight:600;font-size:.98rem;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:transform .25s var(--ease),background .25s,color .25s,border-color .25s,box-shadow .25s;white-space:nowrap}
.btn:active{transform:scale(.98)}
.btn-sm{padding:.55rem 1rem;font-size:.9rem}
.btn-solid{background:var(--green);color:#F3F1E8;border-color:var(--green)}
:root[data-theme="dark"] .btn-solid{background:var(--gold);color:#1B1405;border-color:var(--gold)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn-solid{background:var(--gold);color:#1B1405;border-color:var(--gold)}}
.btn-solid:hover{box-shadow:0 10px 24px -12px rgba(20,48,42,.6);transform:translateY(-2px)}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-line:hover{background:var(--ink);color:var(--bg)}
.btn-gold{background:var(--gold);color:#1B1405}
.btn-gold:hover{background:#F0B83E;transform:translateY(-2px)}
.btn-line-light{border-color:rgba(238,242,238,.35);color:var(--on-dark);background:transparent}
.btn-line-light:hover{border-color:var(--on-dark);background:rgba(255,255,255,.06)}

/* nav */
.nav{position:sticky;top:0;z-index:100;transition:background .3s,box-shadow .3s,border-color .3s;border-bottom:1px solid transparent}
.nav.scrolled{background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.5) blur(14px);-webkit-backdrop-filter:saturate(1.5) blur(14px);border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:76px;gap:1.5rem}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none}
.mono{width:40px;height:40px;border-radius:12px;background:var(--green);color:var(--gold);display:grid;place-items:center;font-family:var(--bn);font-size:1.45rem;line-height:1;padding-top:3px}
:root[data-theme="dark"] .mono{background:var(--green-3)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .mono{background:var(--green-3)}}
.brand-txt{font-family:var(--serif);font-size:1.45rem;letter-spacing:.01em}
.links{display:flex;gap:.2rem;list-style:none;margin:0;padding:0}
.links a{position:relative;display:block;padding:.5rem .85rem;text-decoration:none;color:var(--muted);font-weight:500;font-size:.97rem;transition:color .2s}
.links a::after{content:"";position:absolute;left:.85rem;right:.85rem;bottom:.3rem;height:1.5px;background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease)}
.links a:hover,.links a.on{color:var(--ink)}
.links a:hover::after,.links a.on::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:.6rem}
.theme{width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--surface);cursor:pointer;font-size:1.1rem;display:grid;place-items:center;transition:transform .4s var(--ease)}
.theme:hover{transform:rotate(180deg)}
.burger{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--surface);cursor:pointer;position:relative}
.burger span{position:absolute;left:11px;right:11px;height:1.5px;background:var(--ink);transition:transform .3s var(--ease),top .3s}
.burger span:first-child{top:16px}.burger span:last-child{top:24px}
.burger[aria-expanded="true"] span:first-child{top:20px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:last-child{top:20px;transform:rotate(-45deg)}

/* hero */
.hero{position:relative;padding:clamp(2.5rem,6vw,5rem) 0 clamp(3.5rem,7vw,6rem);overflow:clip}
.grid-paper{position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 70% 40%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 70% 40%,#000 20%,transparent 75%)}
.hero-in{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(2rem,5vw,5rem);align-items:center}
.kicker{display:inline-flex;align-items:center;gap:.6rem;margin:0 0 1.5rem;padding:.4rem .9rem .4rem .7rem;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:.88rem;font-weight:500;color:var(--muted)}
.dot{width:8px;height:8px;border-radius:50%;background:#2E9E6A;box-shadow:0 0 0 0 rgba(46,158,106,.5);animation:pulse 2.4s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(46,158,106,0)}100%{box-shadow:0 0 0 0 rgba(46,158,106,0)}}
.hero h1{font-family:var(--serif);font-size:clamp(2.9rem,6.6vw,5.6rem);line-height:1.02;letter-spacing:-.015em}
.hero h1 em{font-style:italic;color:var(--gold-deep)}
:root[data-theme="dark"] .hero h1 em{color:var(--gold)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .hero h1 em{color:var(--gold)}}
.bn-word{position:relative;display:inline-block;font-family:var(--bn);font-size:.92em;color:var(--green-3);white-space:nowrap}
:root[data-theme="dark"] .bn-word{color:#8FC3B1}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .bn-word{color:#8FC3B1}}
.bn-word svg{position:absolute;left:0;bottom:-.08em;width:100%;height:.28em;overflow:visible}
.bn-word path{fill:none;stroke:var(--gold);stroke-width:5;stroke-linecap:round;stroke-dasharray:260;stroke-dashoffset:260;transition:stroke-dashoffset 1.2s .6s var(--ease)}
.in .bn-word path,.bn-word.in path{stroke-dashoffset:0}
.lede{font-size:clamp(1.08rem,1.4vw,1.2rem);color:var(--muted);max-width:36em;margin:1.6rem 0 2rem}
.cta{display:flex;flex-wrap:wrap;gap:.8rem}
.facts{display:grid;grid-template-columns:repeat(3,auto);justify-content:start;gap:clamp(1.5rem,4vw,3rem);margin:2.8rem 0 0;padding-top:1.8rem;border-top:1px solid var(--line)}
.facts dt{font-family:var(--serif);font-size:clamp(2.2rem,3.5vw,2.9rem);line-height:1;color:var(--ink)}
.facts dd{margin:.35rem 0 0;color:var(--muted);font-size:.9rem;max-width:12em;line-height:1.35}
.portrait{position:relative;margin:0;justify-self:center;width:min(380px,100%)}
.arch{position:relative;border-radius:999px 999px 28px 28px;overflow:hidden;aspect-ratio:4/5;background:var(--soft);box-shadow:var(--shadow);outline:1px solid var(--line);outline-offset:10px}
.arch::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(20,48,42,.25))}
.arch img{width:100%;height:100%;object-fit:cover;object-position:50% 15%;transform:scale(1.06);transition:transform 1.4s var(--ease)}
.portrait.in .arch img{transform:scale(1)}
.badge{position:absolute;display:flex;align-items:center;gap:.6rem;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:.6rem .85rem;font-size:.86rem;line-height:1.3;box-shadow:var(--shadow);animation:float 6s ease-in-out infinite}
.badge b{display:block;font-weight:700;font-size:.95rem}
.badge .ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex:none;font-size:.95rem}
.b1{left:-2.2rem;top:18%}.b1 .ic{background:var(--sky-soft);color:var(--sky)}
.b2{right:-1.8rem;bottom:20%;animation-delay:-2s}.b2 .ic{background:var(--leaf-soft);color:#2E8A5C}
.b3{left:8%;bottom:-1.1rem;font-family:var(--bn);font-size:1.25rem;background:var(--green);color:var(--gold);border-color:transparent;animation-delay:-4s;padding:.45rem 1rem}
@keyframes float{50%{transform:translateY(-8px)}}

/* marquee */
.marquee{border-block:1px solid var(--line);overflow:hidden;background:var(--surface);padding:1.15rem 0}
.track{display:flex;align-items:center;gap:2.2rem;width:max-content;animation:marq 38s linear infinite}
.marquee:hover .track{animation-play-state:paused}
.track span{font-family:var(--serif);font-size:1.45rem;color:var(--muted);white-space:nowrap}
.track i{font-style:normal;color:var(--gold);font-size:.9rem}
@keyframes marq{to{transform:translateX(-50%)}}

/* sections */
.sec{padding:clamp(4.5rem,9vw,8rem) 0}
.sec-dark{background:var(--green);color:var(--on-dark);position:relative;overflow:hidden}
.sec-dark::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.sec-dark > .wrap{position:relative}
.sec-soft{background:var(--soft)}
.sec-head{max-width:640px;margin-bottom:clamp(2.2rem,4vw,3.4rem)}
.eyebrow{font-family:var(--bn);font-size:1.15rem;color:var(--gold-deep);margin:0 0 .5rem}
.sec-dark .eyebrow{color:var(--gold)}
.sec-head h2,.contact h2{font-family:var(--serif);font-size:clamp(2.4rem,5vw,4rem);line-height:1.04;letter-spacing:-.01em}
.sec-head > p:not(.eyebrow){color:var(--muted);margin:1rem 0 0;font-size:1.08rem}
.sec-dark .sec-head > p:not(.eyebrow){color:var(--on-dark-mute)}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* approach: expanding pillars */
.pillars{display:flex;gap:.8rem;min-height:340px}
.pillar{all:unset;box-sizing:border-box;cursor:pointer;flex:1;min-width:0;position:relative;display:flex;flex-direction:column;justify-content:flex-end;gap:.6rem;padding:1.6rem;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);overflow:hidden;transition:flex .6s var(--ease),background .4s,color .4s,border-color .4s}
.pillar:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.pillar .p-num{position:absolute;top:1.3rem;left:1.6rem;font-family:var(--serif);font-size:1.6rem;color:var(--gold-deep)}
.pillar .p-title{font-family:var(--serif);font-size:1.55rem;line-height:1.1}
.pillar .p-body{color:var(--muted);font-size:.98rem;max-height:0;opacity:0;overflow:hidden;transition:max-height .6s var(--ease),opacity .4s}
.pillar.active{flex:2.6;background:var(--green);color:var(--on-dark);border-color:var(--green)}
.pillar.active .p-num{color:var(--gold)}
.pillar.active .p-title{font-size:2rem}
.pillar.active .p-body{max-height:200px;opacity:1;color:var(--on-dark-mute);transition-delay:.15s}
:root[data-theme="dark"] .pillar.active{background:var(--green-3);border-color:var(--green-3)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pillar.active{background:var(--green-3);border-color:var(--green-3)}}

/* resource filters + grid */
.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}
.filters button{border:1px solid rgba(238,242,238,.22);background:transparent;color:var(--on-dark-mute);padding:.55rem 1.05rem;border-radius:999px;cursor:pointer;font-weight:500;transition:all .25s}
.filters button:hover{color:var(--on-dark);border-color:rgba(238,242,238,.5)}
.filters button[aria-selected="true"]{background:var(--gold);color:#1B1405;border-color:var(--gold)}
.res-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.3rem}
.res-grid.all .res:nth-child(1),.res-grid.all .res:nth-child(6){grid-column:span 2}
.res-grid.all .res:nth-child(1) .thumb,.res-grid.all .res:nth-child(6) .thumb{height:240px;padding-inline:3rem}
.res{all:unset;box-sizing:border-box;cursor:pointer;display:flex;flex-direction:column;border-radius:var(--r);background:var(--green-2);border:1px solid rgba(238,242,238,.1);overflow:hidden;transition:transform .45s var(--ease),border-color .3s,box-shadow .45s;animation:rin .6s var(--ease) both}
:root[data-theme="dark"] .res{background:#16231F}
@keyframes rin{from{opacity:0;transform:translateY(16px) scale(.98)}}
.res:hover{transform:translateY(-6px);border-color:rgba(227,168,43,.5);box-shadow:0 30px 50px -30px rgba(0,0,0,.6)}
.res:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.thumb{position:relative;height:210px;padding:1.4rem 1.4rem 0;background:linear-gradient(160deg,var(--green-3),var(--green-2));overflow:hidden}
.paper{position:relative;height:100%;background:#FCFBF6;border-radius:8px 8px 0 0;padding:1rem 1rem 0;color:#26322F;box-shadow:0 -10px 30px -10px rgba(0,0,0,.35);transform:translateY(10px) rotate(-1.5deg);transition:transform .5s var(--ease)}
.res:hover .paper{transform:translateY(0) rotate(0)}
.paper .ph{display:flex;justify-content:space-between;align-items:center;font-size:.62rem;font-weight:700;letter-spacing:.04em;color:#7C8783;border-bottom:1px solid #E6E3D8;padding-bottom:.45rem;margin-bottom:.55rem}
.paper .pt{font-family:var(--bn);font-size:1.15rem;line-height:1.3;color:#14302A;margin-bottom:.4rem}
.paper .ln{height:6px;border-radius:3px;background:#E7E4DA;margin:.38rem 0}
.paper .ln.s{width:62%}.paper .ln.m{width:82%}
.paper .row{display:flex;gap:.4rem;margin-top:.55rem}
.paper .box{flex:1;height:34px;border:1.5px dashed #C9C4B4;border-radius:6px;display:grid;place-items:center;font-family:var(--bn);font-size:.95rem;color:#14302A}
.paper .chk{display:flex;align-items:center;gap:.4rem;font-size:.66rem;color:#5B6864;margin:.32rem 0}
.paper .chk i{width:10px;height:10px;border:1.5px solid #9AA6A1;border-radius:3px;flex:none}
.paper .screen{height:100%;border-radius:8px 8px 0 0;background:#1E443B;display:grid;grid-template-columns:repeat(3,1fr);gap:.4rem;padding:.6rem;align-content:center}
.paper .screen span{background:#FCFBF6;border-radius:6px;height:38px;display:grid;place-items:center;font-family:var(--bn);font-size:1.1rem;color:#14302A;box-shadow:0 3px 0 #C9A44A}
.type-tag{position:absolute;top:.9rem;right:.9rem;z-index:2;font-size:.75rem;font-weight:600;padding:.22rem .6rem;border-radius:999px;background:rgba(11,19,17,.55);color:var(--on-dark);backdrop-filter:blur(6px)}
.res-body{padding:1.25rem 1.35rem 1.4rem;display:flex;flex-direction:column;gap:.45rem;flex:1}
.res-body h3{font-family:var(--serif);font-size:1.5rem;line-height:1.12;color:var(--on-dark)}
.res-body p{margin:0;color:var(--on-dark-mute);font-size:.94rem;line-height:1.5}
.res-meta{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:auto;padding-top:.7rem}
.res-meta span{font-size:.76rem;font-weight:600;padding:.2rem .55rem;border-radius:6px;background:rgba(238,242,238,.08);color:var(--on-dark-mute)}
.res-meta span.attr{background:rgba(227,168,43,.16);color:#F3CE7A}
.res-open{display:inline-flex;align-items:center;gap:.4rem;margin-top:.7rem;font-weight:600;font-size:.9rem;color:var(--gold)}

/* lab */
.lab{margin-top:clamp(3rem,6vw,4.5rem);border-radius:28px;background:linear-gradient(180deg,rgba(238,242,238,.06),rgba(238,242,238,.02));border:1px solid rgba(238,242,238,.12);padding:clamp(1.5rem,4vw,2.75rem)}
.lab-head{display:flex;justify-content:space-between;align-items:flex-end;gap:1.5rem;flex-wrap:wrap;margin-bottom:2rem}
.lab-head .eyebrow{font-family:var(--sans);font-size:.9rem;font-weight:600;color:var(--gold)}
.lab-head h3{font-family:var(--serif);font-size:clamp(1.9rem,3.4vw,2.6rem);line-height:1.1}
.lab-head p{margin:.5rem 0 0;color:var(--on-dark-mute)}
.seg{display:inline-flex;padding:4px;border-radius:999px;background:rgba(0,0,0,.25);border:1px solid rgba(238,242,238,.12)}
.seg button{border:0;background:transparent;color:var(--on-dark-mute);padding:.55rem 1.1rem;border-radius:999px;cursor:pointer;font-weight:600;transition:all .25s}
.seg button[aria-selected="true"]{background:var(--on-dark);color:var(--green)}
.act{animation:rin .5s var(--ease)}
.build{display:grid;grid-template-columns:.8fr 1.2fr;gap:2rem;align-items:center}
.build-pic{text-align:center;padding:2rem 1rem;border-radius:22px;background:rgba(0,0,0,.18)}
.build-pic .emoji{font-size:5rem;line-height:1;display:inline-block;animation:float 5s ease-in-out infinite}
.build-clue{margin:1rem 0 .2rem;font-size:1.1rem}
.build-clue b{color:var(--gold)}
.build-step{margin:0;color:var(--on-dark-mute);font-size:.9rem}
.slots{display:flex;gap:.6rem;margin-bottom:1.4rem;min-height:84px}
.slot{width:72px;height:84px;border-radius:14px;border:2px dashed rgba(238,242,238,.3);display:grid;place-items:center;font-family:var(--bn);font-size:2.3rem;transition:all .3s var(--ease)}
.slot.filled{border-style:solid;border-color:var(--gold);background:rgba(227,168,43,.12)}
.slots.win .slot{border-color:#6FD09F;background:rgba(111,208,159,.15);animation:bounce .5s var(--ease) both}
.slots.win .slot:nth-child(2){animation-delay:.08s}.slots.win .slot:nth-child(3){animation-delay:.16s}
@keyframes bounce{40%{transform:translateY(-10px)}}
.slots.shake{animation:shake .4s}
@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.tiles{display:flex;flex-wrap:wrap;gap:.6rem}
.tile{width:60px;height:64px;border-radius:12px;border:0;background:#FCFBF6;color:#14302A;font-family:var(--bn);font-size:1.9rem;cursor:pointer;box-shadow:0 4px 0 #C9A44A;transition:transform .2s var(--ease),opacity .2s}
.tile:hover{transform:translateY(-3px)}
.tile:active{transform:translateY(2px);box-shadow:0 2px 0 #C9A44A}
.tile[disabled]{opacity:.2;cursor:default;transform:none}
.tile.hint{animation:glow 1s 2}
@keyframes glow{50%{box-shadow:0 4px 0 #C9A44A,0 0 0 5px rgba(227,168,43,.55)}}
.build-ctl{display:flex;gap:.6rem;margin-top:1.4rem;flex-wrap:wrap}
.feedback{min-height:1.6em;margin:.9rem 0 0;font-weight:600;color:var(--gold)}
.quiz{max-width:760px}
.q-top{display:flex;align-items:center;gap:1rem;font-size:.9rem;color:var(--on-dark-mute);font-weight:600}
.q-bar{flex:1;height:6px;border-radius:9px;background:rgba(238,242,238,.12);overflow:hidden}
.q-bar i{display:block;height:100%;width:0;background:var(--gold);transition:width .5s var(--ease)}
.quiz h4{font-family:var(--bn);font-size:clamp(1.5rem,3vw,2rem);line-height:1.4;margin-top:1.6rem}
.q-en{margin:.3rem 0 1.4rem;color:var(--on-dark-mute)}
.q-opts{display:grid;grid-template-columns:1fr 1fr;gap:.7rem}
.opt{text-align:left;border:1px solid rgba(238,242,238,.2);background:rgba(0,0,0,.15);border-radius:14px;padding:1rem 1.1rem;cursor:pointer;font-family:var(--bn);font-size:1.3rem;display:flex;align-items:center;gap:.8rem;transition:all .25s}
.opt small{font-family:var(--sans);font-size:.85rem;color:var(--on-dark-mute)}
.opt .k{width:28px;height:28px;flex:none;border-radius:8px;display:grid;place-items:center;background:rgba(238,242,238,.1);font-family:var(--sans);font-size:.85rem;font-weight:700}
.opt:hover:not([disabled]){border-color:var(--gold);transform:translateY(-2px)}
.opt.right{border-color:#6FD09F;background:rgba(111,208,159,.16)}
.opt.wrong{border-color:#F08A74;background:rgba(240,138,116,.14)}
.opt[disabled]{cursor:default}

/* experience */
.exp{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.sticky-head{position:sticky;top:110px}
.sticky-head .btn{margin-top:1.6rem}
.timeline{list-style:none;margin:0;padding:0;position:relative}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1.5px;background:var(--line)}
.t-item{position:relative;padding:0 0 1.6rem 2.4rem}
.t-item::before{content:"";position:absolute;left:0;top:.45rem;width:16px;height:16px;border-radius:50%;background:var(--bg);border:2px solid var(--muted)}
.t-item.current::before{background:var(--gold);border-color:var(--gold);box-shadow:0 0 0 5px var(--gold-soft)}
.t-when{font-size:.85rem;font-weight:600;color:var(--gold-deep);margin-bottom:.5rem;font-variant-numeric:tabular-nums}
:root[data-theme="dark"] .t-when{color:var(--gold)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .t-when{color:var(--gold)}}
.t-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.5rem 1.6rem;transition:box-shadow .4s,transform .4s var(--ease)}
.t-card:hover{box-shadow:var(--shadow);transform:translateX(4px)}
.t-top{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}
.t-card h3{font-family:var(--serif);font-size:1.7rem;line-height:1.1}
.pill{font-size:.75rem;font-weight:700;padding:.2rem .6rem;border-radius:999px;white-space:nowrap}
.pill.live{background:var(--leaf-soft);color:#257A50}
.t-org{margin:.3rem 0 0;color:var(--muted);font-size:.95rem}
.t-role{margin-top:1.1rem;padding-top:1.1rem;border-top:1px dashed var(--line)}
.t-role h4{font-weight:600;font-size:1.05rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.3rem 1rem}
.t-role h4 span{font-weight:500;font-size:.88rem;color:var(--muted)}
.t-role ul{margin:.6rem 0 0;padding-left:1.1rem}
.t-role li{margin:.3rem 0;color:var(--muted)}
.t-role li::marker{color:var(--gold)}

/* credentials */
.honours{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.honour{position:relative;padding:2rem 1.8rem;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);overflow:hidden;transition:transform .45s var(--ease),box-shadow .45s}
.honour:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.honour::after{content:"";position:absolute;right:-50px;top:-50px;width:150px;height:150px;border-radius:50%;opacity:.9;transition:transform .7s var(--ease)}
.honour:hover::after{transform:scale(1.25)}
.h-gold::after{background:var(--gold-soft)}.h-blue::after{background:var(--sky-soft)}.h-green::after{background:var(--leaf-soft)}
.h-year{position:relative;z-index:1;font-size:.82rem;font-weight:700;color:var(--muted)}
.honour h3{position:relative;z-index:1;font-family:var(--serif);font-size:1.85rem;line-height:1.08;margin:1.6rem 0 .6rem}
.honour p{position:relative;z-index:1;margin:0;color:var(--muted)}
.pd{margin-top:3.5rem;display:grid;grid-template-columns:.6fr 1.4fr;gap:2rem}
.pd h3,.edu h3{font-family:var(--serif)}
.pd > h3{font-size:2rem;line-height:1.1}
.pd-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.pd-list li{display:grid;grid-template-columns:1fr 1.2fr;gap:1.5rem;padding:1.05rem 0;border-bottom:1px solid var(--line);transition:padding .3s var(--ease),background .3s}
.pd-list li:hover{padding-left:.8rem;background:linear-gradient(90deg,var(--gold-soft),transparent)}
.pd-org{color:var(--muted);font-size:.9rem}
.pd-title{font-weight:600}
.edu{margin-top:3.5rem;display:grid;grid-template-columns:1fr 1fr 1fr;gap:1.2rem}
.edu-card{padding:1.6rem 1.7rem;border-radius:var(--r);background:var(--surface);border:1px solid var(--line)}
.edu-k{font-size:.82rem;font-weight:700;color:var(--gold-deep)}
:root[data-theme="dark"] .edu-k{color:var(--gold)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .edu-k{color:var(--gold)}}
.edu-card h3{font-size:1.6rem;line-height:1.12;margin:.5rem 0 .3rem}
.edu-card p{margin:0;color:var(--muted)}
.langs p{margin:.35rem 0 0}
.langs p b{color:var(--ink);font-weight:600;margin-right:.3rem}
.langs .leo{margin-top:.9rem;padding-top:.8rem;border-top:1px dashed var(--line);font-size:.92rem}

/* contact */
.contact-in{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,6vw,6rem);align-items:start}
.contact h2 em{font-style:italic;color:var(--gold)}
.c-lede{color:var(--on-dark-mute);margin:1.2rem 0 2rem;max-width:30em;font-size:1.08rem}
.c-list{list-style:none;margin:0;padding:0;border-top:1px solid rgba(238,242,238,.14)}
.c-list li{display:flex;align-items:center;gap:1rem;padding:1rem 0;border-bottom:1px solid rgba(238,242,238,.14)}
.c-list span{width:5.5rem;flex:none;color:var(--on-dark-mute);font-size:.9rem}
.c-list a,.c-list p{margin:0;color:var(--on-dark);font-weight:500;text-decoration:none;overflow-wrap:anywhere}
.c-list a:hover{color:var(--gold)}
.copy{margin-left:auto;border:1px solid rgba(238,242,238,.25);background:transparent;color:var(--on-dark-mute);border-radius:8px;padding:.25rem .65rem;font-size:.8rem;font-weight:600;cursor:pointer}
.copy:hover{color:var(--on-dark);border-color:var(--on-dark)}
.c-form{background:var(--surface);color:var(--ink);border-radius:26px;padding:clamp(1.6rem,4vw,2.4rem);box-shadow:0 40px 80px -40px rgba(0,0,0,.6)}
.c-form h3{font-family:var(--serif);font-size:2rem;margin-bottom:1.2rem}
.field{position:relative;margin-bottom:1rem}
.field input,.field textarea,.field select{width:100%;border:1px solid var(--line);background:var(--bg);border-radius:12px;padding:1.35rem .95rem .55rem;outline:none;transition:border-color .2s,box-shadow .2s;appearance:none}
.field select{background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 55%,calc(100% - 15px) 55%;background-size:5px 5px;background-repeat:no-repeat}
.field textarea{resize:vertical;min-height:120px}
.field label{position:absolute;left:.95rem;top:.95rem;color:var(--muted);pointer-events:none;transition:all .2s var(--ease);font-size:1rem}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--gold);box-shadow:0 0 0 4px var(--gold-soft)}
.field input:focus+label,.field input:not(:placeholder-shown)+label,.field textarea:focus+label,.field textarea:not(:placeholder-shown)+label,.field label.fixed{top:.4rem;font-size:.75rem;font-weight:600}
.field.err input,.field.err textarea{border-color:var(--terra)}
.c-form .btn{width:100%;margin-top:.4rem}
.fine{font-size:.82rem;color:var(--muted);margin:.8rem 0 0}

/* footer */
.foot{background:var(--green);color:var(--on-dark-mute);padding:1.6rem 0 2rem;border-top:1px solid rgba(238,242,238,.1);font-size:.92rem}
.foot-in{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
.foot a{color:var(--on-dark);text-decoration:none}
.foot-bn{font-family:var(--bn);color:var(--gold);font-size:1.1rem}

/* modal */
.modal{border:0;padding:0;border-radius:24px;width:min(860px,calc(100% - 2rem));max-height:calc(100vh - 3rem);background:var(--surface);color:var(--ink);box-shadow:0 50px 100px -30px rgba(0,0,0,.6)}
.modal::backdrop{background:rgba(9,16,14,.6);backdrop-filter:blur(4px)}
.modal[open]{animation:mIn .45s var(--ease)}
@keyframes mIn{from{opacity:0;transform:translateY(24px) scale(.98)}}
.m-in{padding:clamp(1.5rem,4vw,2.5rem);position:relative}
.m-close{position:absolute;top:1rem;right:1rem;width:40px;height:40px;border-radius:50%;border:1px solid var(--line);background:var(--bg);cursor:pointer;font-size:1rem}
.m-meta{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:.9rem;padding-right:3rem}
.m-meta span{font-size:.78rem;font-weight:600;padding:.25rem .65rem;border-radius:999px;background:var(--soft);color:var(--muted)}
.m-meta span.attr{background:var(--gold-soft);color:var(--gold-deep)}
.modal h3{font-family:var(--serif);font-size:clamp(1.9rem,4vw,2.6rem);line-height:1.08;padding-right:2.5rem}
.m-desc{color:var(--muted);margin:.6rem 0 1.5rem}
.m-doc{background:#FCFBF6;color:#26322F;border:1px solid #E6E3D8;border-radius:14px;padding:clamp(1.2rem,3vw,2rem);font-size:.97rem}
.m-doc h4{font-family:var(--bn);font-size:1.5rem;color:#14302A;margin-bottom:.2rem}
.m-doc .d-sub{color:#6E7975;font-size:.88rem;margin:0 0 1rem}
.m-doc .d-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-bottom:1rem}
.m-doc .d-grid div{background:#F2EFE4;border-radius:10px;padding:.6rem .75rem;font-size:.85rem}
.m-doc .d-grid b{display:block;font-size:.72rem;color:#7C8783;font-weight:700}
.m-doc .d-sec{margin-top:1rem}
.m-doc .d-sec h5{margin:0 0 .35rem;font-size:.92rem;font-weight:700;color:#14302A;display:flex;align-items:center;gap:.5rem}
.m-doc .d-sec h5 i{font-style:normal;font-size:.72rem;font-weight:600;background:#E3EDE7;color:#2C5A4E;padding:.1rem .45rem;border-radius:5px}
.m-doc ul,.m-doc ol{margin:0;padding-left:1.2rem}
.m-doc li{margin:.25rem 0}
.m-doc [lang="bn"]{font-family:var(--bn)}
.m-doc table{width:100%;border-collapse:collapse;font-size:.88rem}
.m-doc th,.m-doc td{border:1px solid #E1DDD0;padding:.5rem .6rem;text-align:left;vertical-align:top}
.m-doc th{background:#F2EFE4;font-weight:700}
.m-doc .tbl{overflow-x:auto}
.m-foot{display:flex;flex-wrap:wrap;gap:.7rem;align-items:center;margin-top:1.4rem}
.m-foot p{margin:0;color:var(--muted);font-size:.88rem}

/* toast */
.toast{position:fixed;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 24px);transform:translate(-50%,140%);visibility:hidden;background:var(--ink);color:var(--bg);padding:.75rem 1.15rem;border-radius:12px;font-weight:600;z-index:300;transition:transform .4s var(--ease),visibility 0s .4s}
.toast.show{visibility:visible;transform:translate(-50%,0);transition:transform .4s var(--ease)}

/* responsive */
@media (max-width:1080px){
  .res-grid{grid-template-columns:1fr 1fr}
  .res-grid.all .res:nth-child(6){grid-column:auto}
  .res-grid.all .res:nth-child(6) .thumb{height:210px;padding-inline:1.4rem}
  .b1{left:-.8rem}.b2{right:-.6rem}
}
@media (max-width:900px){
  .links{display:none;position:absolute;top:76px;left:0;right:0;flex-direction:column;padding:.8rem 1.5rem 1.2rem;background:var(--bg);border-bottom:1px solid var(--line)}
  .links.open{display:flex}
  .links a::after{display:none}
  .burger{display:block}
  .nav-actions .btn{display:none}
  .hero-in{grid-template-columns:1fr}
  .portrait{order:-1;width:min(300px,78%)}
  .pillars{flex-direction:column;min-height:0}
  .pillar{flex:none;padding-top:3.6rem}
  .pillar.active{flex:none}
  .exp,.contact-in,.pd{grid-template-columns:1fr}
  .sticky-head{position:static}
  .honours,.edu{grid-template-columns:1fr}
  .build{grid-template-columns:1fr}
}
@media (max-width:620px){
  .wrap{width:min(1200px,100% - 2.2rem)}
  .res-grid{grid-template-columns:1fr}
  .res-grid.all .res:nth-child(1){grid-column:auto}
  .res-grid.all .res .thumb{height:210px!important;padding-inline:1.4rem!important}
  .facts{grid-template-columns:repeat(3,1fr);gap:1rem}
  .facts dd{font-size:.8rem}
  .q-opts{grid-template-columns:1fr}
  .pd-list li{grid-template-columns:1fr;gap:.2rem}
  .m-doc .d-grid{grid-template-columns:1fr 1fr}
  .slot{width:60px;height:72px;font-size:2rem}
  .tile{width:52px;height:56px;font-size:1.6rem}
  .brand-txt{font-size:1.25rem}
  .badge{font-size:.78rem;padding:.45rem .65rem}
  .b1{left:-1.2rem;top:12%}.b2{right:-1.2rem}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}
}