/* MASUM VAI bio site: all styling lives here. */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:150px}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans Bengali",Arial,sans-serif;line-height:1.65;background:#050807}
.sr{position:absolute;opacity:0;width:1px;height:1px}
.sprite{position:absolute}
.site{--bg:#050807;--card:#0B1210;--g1:#00E89A;--g2:#16C784;--tx:#F5F7F6;--tx2:#A6B3AC;--bd:rgba(0,232,154,.22);--hd:rgba(5,8,7,.97);--on:#04110B;
 background:var(--bg);color:var(--tx);min-height:100vh;overflow-x:hidden}
#theme:checked~.site{--bg:#F3F8F5;--card:#FFFFFF;--g1:#007A52;--g2:#0A8F60;--tx:#0B1512;--tx2:#44564D;--bd:rgba(0,122,82,.3);--hd:rgba(243,248,245,.97);--on:#FFFFFF}
#theme:focus-visible~.site .tog{outline:3px solid var(--g1);outline-offset:2px}
:focus-visible{outline:3px solid var(--g1);outline-offset:3px;border-radius:6px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,p{margin:0}
h1{font-size:clamp(2.1rem,6vw,3.6rem);line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,4vw,2.4rem);line-height:1.2;margin-bottom:1rem}
h3{font-size:1.1rem}
.wrap{max-width:1140px;margin:0 auto;padding:4.5rem 1.25rem}
.kick{color:var(--g1);font-size:.85rem;font-weight:700;letter-spacing:.08em;margin-bottom:.5rem}
p{color:var(--tx2);margin-bottom:1rem}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:var(--hd);border-bottom:1px solid var(--bd)}
.bar{display:flex;justify-content:space-between;align-items:center;gap:1rem;max-width:1140px;margin:0 auto;padding:.7rem 1.25rem 0}
.logo{display:flex;align-items:center;gap:.6rem;font-weight:800;letter-spacing:.04em}
.m{display:grid;place-items:center;width:2.2rem;height:2.2rem;border-radius:.6rem;background:linear-gradient(135deg,var(--g1),var(--g2));color:var(--on)}
.tog{cursor:pointer;min-height:44px;display:inline-flex;align-items:center;padding:0 1rem;border:1px solid var(--bd);border-radius:999px;font-size:.85rem;color:var(--tx2);transition:border-color .2s,color .2s}
.tog:hover{border-color:var(--g1);color:var(--g1)}
.tog .lt{display:none}
#theme:checked~.site .tog .lt{display:inline}
#theme:checked~.site .tog .dk{display:none}
.nav{display:flex;flex-wrap:wrap;gap:.25rem;max-width:1140px;margin:0 auto;padding:.4rem 1rem .6rem}
.nav a,summary{display:flex;align-items:center;min-height:44px;padding:0 .85rem;border-radius:.6rem;font-size:.95rem;font-weight:600;color:var(--tx);cursor:pointer;transition:background .2s,color .2s}
.nav a:hover,summary:hover,details[open]>summary{background:rgba(0,232,154,.12);color:var(--g1)}
summary{list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"";width:.45rem;height:.45rem;margin-left:.45rem;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
details[open]>summary::after{transform:rotate(-135deg)}
.panel{position:absolute;left:0;right:0;top:100%;max-height:calc(100vh - 130px);overflow-y:auto;padding:1.25rem;background:var(--bg);border-bottom:2px solid var(--g1);box-shadow:0 24px 50px rgba(0,0,0,.45)}
.panel>*{max-width:1100px;margin-left:auto;margin-right:auto}
.ph{font-size:1.25rem;margin:0 auto .75rem}
.th{display:flex;align-items:center;gap:1rem;margin-bottom:.75rem}
.th img{width:64px;height:64px;border-radius:50%;object-fit:cover;border:2px solid var(--g1)}
.th p{margin:0}
.cat{margin-bottom:1.25rem;padding:1rem;border:1px solid var(--bd);border-radius:1rem;background:rgba(0,232,154,.04)}
.cat h3{color:var(--g1);margin-bottom:.75rem}
.team-cat{border-color:var(--g2)}

/* cards and buttons */
.grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin-top:1.5rem}
.card{display:flex;flex-direction:column;align-items:flex-start;gap:.6rem;padding:1.25rem;background:var(--card);border:1px solid var(--bd);border-radius:1rem;transition:transform .2s,border-color .2s,box-shadow .2s}
.card:hover{transform:translateY(-3px);border-color:var(--g1);box-shadow:0 10px 30px rgba(0,232,154,.1)}
.card p{margin:0}
.acc b{overflow-wrap:anywhere}
.ic{width:2.4rem;height:2.4rem;padding:.5rem;border-radius:.7rem;background:rgba(0,232,154,.12);fill:none;stroke:var(--g1);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 1.25rem;border:1px solid var(--g1);border-radius:.7rem;font-weight:700;font-size:.95rem;color:var(--g1);transition:background .2s,color .2s}
.btn:hover{background:rgba(0,232,154,.14)}
.btn.pri{background:linear-gradient(135deg,var(--g1),var(--g2));color:var(--on);border-color:transparent}
.btn.pri:hover{filter:brightness(1.08)}
.btn:not([href]){border-style:dashed;border-color:var(--tx2);color:var(--tx2);cursor:not-allowed;background:none}
.btns{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.25rem}

/* hero and splits */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center;padding-top:3.5rem}
.pub{color:var(--g1);font-size:1.4rem;font-weight:700;margin:.4rem 0}
.sub{color:var(--tx);font-weight:600}
.portrait{margin:0;text-align:center}
.portrait img{width:min(100%,380px);aspect-ratio:1;margin:0 auto;object-fit:cover;border-radius:50%;border:3px solid var(--g1);box-shadow:0 0 50px rgba(0,232,154,.25)}
.portrait figcaption{margin-top:1.25rem;color:var(--tx2);font-style:italic}
.split{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.pic{width:100%;max-width:440px;aspect-ratio:1;object-fit:cover;margin:0 auto;border-radius:1.5rem;border:2px solid var(--bd);box-shadow:0 20px 50px rgba(0,0,0,.35)}
.logo-pic{max-width:300px;border-radius:50%;border-color:var(--g1)}
.tl{border-left:2px solid var(--g1);margin:1.25rem 0;padding-left:1.25rem}
.tl li{position:relative;padding:.5rem 0;color:var(--tx)}
.tl li::before{content:"";position:absolute;left:-1.7rem;top:.95rem;width:.7rem;height:.7rem;border-radius:50%;background:var(--g1);box-shadow:0 0 0 4px rgba(0,232,154,.2)}
blockquote{margin:1.5rem 0 0;padding:1rem 1.25rem;border-left:4px solid var(--g1);background:var(--card);border-radius:0 1rem 1rem 0;color:var(--tx);font-style:italic}

/* footer */
.ftr{border-top:1px solid var(--bd);background:var(--card)}
.fgrid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:2rem;padding-top:3rem;padding-bottom:1.5rem}
.fgrid li{padding:.2rem 0}
.fgrid a:not(.logo):hover{color:var(--g1)}
.copy{text-align:center;padding:0 1.25rem 2rem;margin:0}

/* responsive */
@media (max-width:480px){
 html{scroll-padding-top:200px}
 .wrap{padding:3rem 1rem}
 .hero,.split,.fgrid{grid-template-columns:1fr;gap:2rem}
 .hero .portrait{order:-1}
 .btns .btn,.card .btn{width:100%}
 .nav a,summary{padding:0 .6rem;font-size:.9rem}
 .tog{padding:0 .75rem}
 .grid,.g3{grid-template-columns:1fr}
}
@media (min-width:481px) and (max-width:768px){
 .hero,.split,.fgrid{grid-template-columns:1fr;gap:2rem}
 .hero .portrait{order:-1}
 .panel{max-height:calc(100vh - 150px)}
}
@media (min-width:769px) and (max-width:1200px){
 .hero{gap:2rem}
 .nav{justify-content:center}
}
@media (min-width:1201px){
 .wrap{padding-top:6rem;padding-bottom:6rem}
 .nav{justify-content:flex-end}
 .hdr{display:flex;align-items:center;justify-content:space-between;max-width:none;padding:0 max(1.25rem,calc((100vw - 1140px)/2))}
 .bar{padding:0}
 .hdr nav{flex:1}
 .panel{left:0;right:0}
}
@media (prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{transition:none!important;animation:none!important}
}