/* ============================================================
   Mamunul Karim — shared stylesheet
   Palette: ASU maroon, ASU gold, white, black.
   Change the six values below to restyle the entire site.
   ============================================================ */
:root{
  --paper:#FFFFFF;
  --ink:#111111;
  --slate:#5F5F5F;
  --rule:#E4E4E4;
  --maroon:#8C1D40;
  --gold:#FFC627;
  --wrap:66rem;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Source Serif 4",Georgia,serif;
  font-size:1.0625rem;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.sans{font-family:Archivo,"Helvetica Neue",Arial,sans-serif;}
a{color:var(--maroon);text-underline-offset:.18em;text-decoration-thickness:1px;}
a:hover{color:var(--ink);}
:focus-visible{outline:2px solid var(--maroon);outline-offset:3px;}
img{max-width:100%;height:auto;display:block;}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 1.5rem;}
.topbar{height:3px;background:var(--maroon);}

.skip{position:absolute;left:-9999px;}
.skip:focus{left:1rem;top:1rem;position:fixed;z-index:99;background:var(--ink);color:#fff;padding:.6rem 1rem;}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--rule);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:3.5rem;}
.nav-name{font-family:Archivo;font-weight:600;font-size:.95rem;letter-spacing:-.01em;text-decoration:none;color:var(--ink);}
.nav-name:hover{color:var(--maroon);}
.nav-links{display:flex;gap:1.05rem;list-style:none;margin:0;padding:0;}
.nav-links a{font-family:Archivo;font-weight:500;font-size:.9rem;text-decoration:none;color:var(--slate);}
.nav-links a:hover{color:var(--ink);}
.nav-links a.here{color:var(--ink);border-bottom:2px solid var(--gold);padding-bottom:2px;}
@media (max-width:980px){
  .nav-in{gap:.75rem;}
  .nav-links{
    gap:.95rem;flex:1;justify-content:flex-start;
    overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
  }
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-links li{flex:0 0 auto;}
  .nav-links a{font-size:.85rem;}
  .nav-hide-sm{display:none;}
}

/* ---------- HERO ---------- */
.hero{padding:5.5rem 0 0;border-bottom:1px solid var(--rule);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:3rem;align-items:center;}
@media (max-width:820px){
  .hero-grid{grid-template-columns:1fr;gap:2rem;}
  .hero-grid .portrait{max-width:15rem;}
}
.hero h1{
  font-weight:800;
  font-size:clamp(2.7rem,8vw,4.75rem);
  line-height:.98;
  letter-spacing:-.035em;
  margin:0 0 1.2rem;
  max-width:14ch;
}
.lede{font-size:clamp(1.08rem,2.1vw,1.3rem);line-height:1.55;max-width:50ch;color:var(--slate);margin:0 0 2.25rem;}
.lede strong{color:var(--ink);font-weight:600;}
.btns{display:flex;flex-wrap:wrap;gap:.75rem;margin-bottom:4rem;}
.btn{font-family:Archivo;font-weight:500;font-size:.95rem;padding:.7rem 1.4rem;text-decoration:none;border:1px solid var(--maroon);}
.btn-solid{background:var(--maroon);color:#fff;}
.btn-solid:hover{background:var(--gold);border-color:var(--gold);color:var(--ink);}
.btn-line{color:var(--maroon);}
.btn-line:hover{background:var(--maroon);color:#fff;}

/* Title block — borrowed from the corner of a drawing sheet */
.titleblock{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--rule);}
.tb{padding:1rem 1.1rem 1.1rem;border-right:1px solid var(--rule);}
.tb:last-child{border-right:0;}
.tb .k{font-family:Archivo;font-weight:500;font-size:.74rem;color:var(--slate);display:block;margin-bottom:.2rem;}
.tb .v{font-family:Archivo;font-weight:600;font-size:.94rem;line-height:1.35;display:block;}
.tb .v a{color:var(--maroon);text-decoration:none;border-bottom:1px solid var(--rule);}
.tb .v a:hover{border-color:var(--maroon);}
@media (max-width:780px){
  .titleblock{grid-template-columns:1fr 1fr;}
  .tb{border-bottom:1px solid var(--rule);}
  .tb:nth-child(2n){border-right:0;}
  .tb:nth-last-child(-n+2){border-bottom:0;}
}

/* ---------- PAGE HEADER (subpages) ---------- */
.page-head{padding:4.5rem 0 3rem;border-bottom:1px solid var(--rule);}
.page-head h1{font-size:clamp(2rem,5vw,3rem);font-weight:800;letter-spacing:-.03em;line-height:1.05;margin:0 0 .9rem;}
.page-head p{margin:0;color:var(--slate);max-width:58ch;}

/* ---------- SECTIONS ---------- */
.sec{padding:4.5rem 0;border-bottom:1px solid var(--rule);}
.sec:last-of-type{border-bottom:0;}
.sec-head{margin-bottom:2.5rem;}
.sec-head h2{font-size:clamp(1.5rem,3.2vw,2rem);font-weight:600;letter-spacing:-.02em;margin:0 0 .4rem;}
.sec-head p{margin:0;color:var(--slate);max-width:58ch;}
.prose{max-width:64ch;}
.prose p{margin:0 0 1.15rem;}

.about-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:3rem;align-items:start;}
.portrait{border:1px solid var(--rule);padding:.5rem;margin:0;}
.portrait img{width:100%;aspect-ratio:4/5;object-fit:cover;}
.portrait figcaption{font-family:Archivo;font-size:.8rem;color:var(--slate);padding:.6rem .2rem .1rem;}
@media (max-width:820px){.about-grid{grid-template-columns:1fr;gap:2rem;}.portrait{max-width:19rem;}}

.known{border:1px solid var(--rule);padding:1.6rem 1.7rem;margin:0;}
.known h3{margin:0 0 1rem;font-size:1.08rem;font-weight:600;letter-spacing:-.01em;padding-bottom:.75rem;border-bottom:1px solid var(--rule);}
.known ul{list-style:none;margin:0;padding:0;}
.known li{position:relative;padding-left:1.1rem;margin-bottom:.7rem;font-size:.98rem;line-height:1.55;}
.known li:last-child{margin-bottom:0;}
.known li::before{content:"";position:absolute;left:0;top:.62em;width:5px;height:5px;background:var(--maroon);}

/* ---------- PROJECT SHEETS ---------- */
.sheets{display:grid;gap:1.25rem;}
.sheet{border:1px solid var(--rule);padding:1.6rem 1.7rem;}
.sheet-top{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;margin-bottom:1.1rem;padding-bottom:1rem;border-bottom:1px solid var(--rule);}
.sheet-top h3{margin:0;font-size:1.18rem;font-weight:600;letter-spacing:-.01em;max-width:42ch;}
.sheet-top .when{font-family:Archivo;font-size:.85rem;color:var(--slate);white-space:nowrap;}
.spec{display:grid;grid-template-columns:8.5rem minmax(0,1fr);gap:.55rem 1.25rem;margin:0;}
.spec dt{font-family:Archivo;font-weight:500;font-size:.85rem;color:var(--slate);padding-top:.22rem;}
.spec dd{margin:0;}
@media (max-width:640px){
  .sheet{padding:1.35rem;}
  .spec{grid-template-columns:1fr;gap:.15rem;}
  .spec dt{padding-top:.7rem;}
  .spec dt:first-of-type{padding-top:0;}
}

/* ---------- PUBLICATIONS ---------- */
.pub{padding:1.15rem 0;border-top:1px solid var(--rule);max-width:66ch;}
.pub:first-child{border-top:0;padding-top:0;}
.pub h3{margin:0 0 .3rem;font-size:1rem;font-weight:600;line-height:1.45;}
.pub .meta{font-family:Archivo;font-size:.85rem;color:var(--slate);line-height:1.55;}
.pub .venue{font-family:Archivo;font-size:.85rem;color:var(--slate);line-height:1.55;margin-top:.15rem;}
.pub .venue .status{color:var(--maroon);font-weight:600;}
.pub .venue a{color:var(--maroon);}

/* ---------- EXPERIENCE & EDUCATION ---------- */
.job{padding:1.5rem 0;border-top:1px solid var(--rule);}
.job:first-child{border-top:0;padding-top:0;}
.job-top{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;}
.job h3{margin:0;font-size:1.08rem;font-weight:600;}
.job .org{font-family:Archivo;font-size:.93rem;color:var(--slate);}
.job .when{font-family:Archivo;font-size:.85rem;color:var(--slate);white-space:nowrap;}
.job ul{margin:.8rem 0 0;padding-left:1.1rem;max-width:64ch;}
.job li{margin-bottom:.35rem;}

.edu{margin-top:3rem;border-top:1px solid var(--rule);}
.edu-title{font-family:Archivo;font-size:1.08rem;font-weight:600;margin:1.75rem 0 .9rem;}
.deg{padding:.95rem 0;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;}
.deg:first-of-type{border-top:0;padding-top:0;}
.deg .d-name{font-family:Archivo;font-weight:600;font-size:.98rem;margin:0;}
.deg .d-org{font-family:Archivo;font-size:.89rem;color:var(--slate);}
.deg .when{font-family:Archivo;font-size:.85rem;color:var(--slate);white-space:nowrap;}

/* ---------- GALLERY (visualization page) ---------- */
.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.5rem;}
.shot{margin:0;border:1px solid var(--rule);padding:.5rem;}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.shot figcaption{font-family:Archivo;font-size:.85rem;color:var(--slate);padding:.7rem .3rem .2rem;line-height:1.5;}
.shot figcaption b{color:var(--ink);font-weight:600;display:block;font-size:.92rem;margin-bottom:.1rem;}
.gallery.trio{grid-template-columns:repeat(3,minmax(0,1fr));}
.gallery.trio .shot img{aspect-ratio:4/3;}
@media (max-width:900px){.gallery.trio{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:760px){.gallery{grid-template-columns:1fr;}.gallery.trio{grid-template-columns:1fr;}}

.more{margin:1.35rem 0 0;font-family:Archivo;font-size:.9rem;font-weight:500;}
.more a{color:var(--maroon);text-decoration:none;border-bottom:1px solid var(--rule);padding-bottom:2px;}
.more a:hover{color:var(--ink);border-color:var(--gold);}

.video-wrap{border:1px solid var(--rule);padding:.5rem;margin:0 0 1rem;}
.video-wrap video{width:100%;display:block;background:#000;}
.video-wrap iframe{width:100%;aspect-ratio:16/9;border:0;display:block;}
.video-note{font-family:Archivo;font-size:.85rem;color:var(--slate);margin:0;}

/* ---------- BOARDS (AI in Construction page) ---------- */
.board{margin:0;border:1px solid var(--rule);padding:.5rem;max-width:44rem;}
.board a{display:block;}
.board img{width:100%;}
.board figcaption{font-family:Archivo;font-size:.85rem;color:var(--slate);padding:.75rem .3rem .2rem;line-height:1.5;}
.board figcaption b{color:var(--ink);font-weight:600;display:block;font-size:.92rem;margin-bottom:.1rem;}

/* ---------- CERTIFICATES ---------- */
.certs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem;}
.cert{margin:0;border:1px solid var(--rule);padding:.5rem;}
.cert img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#FAFAFA;}
.cert figcaption{padding:.7rem .3rem .2rem;}
.cert .c-name{font-family:Archivo;font-weight:600;font-size:.93rem;display:block;line-height:1.4;}
.cert .c-org{font-family:Archivo;font-size:.83rem;color:var(--slate);display:block;margin-top:.15rem;}
@media (max-width:900px){.certs{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:560px){.certs{grid-template-columns:1fr;}}

.awards{list-style:none;margin:0;padding:0;max-width:64ch;}
.awards li{padding:.85rem 0;border-top:1px solid var(--rule);}
.awards li:first-child{border-top:0;padding-top:0;}

/* ---------- CONTACT ---------- */
.mail{font-family:Archivo;font-weight:600;font-size:clamp(1.25rem,4vw,2.1rem);letter-spacing:-.02em;text-decoration:none;color:var(--ink);border-bottom:3px solid var(--gold);display:inline-block;word-break:break-word;}
.mail:hover{color:var(--maroon);border-color:var(--maroon);}
.alt-mail{font-family:Archivo;font-size:.92rem;color:var(--slate);margin:1rem 0 0;}
.links{display:flex;flex-wrap:wrap;gap:1.5rem;margin-top:1.75rem;list-style:none;padding:0;}
.links a{font-family:Archivo;font-weight:500;font-size:.97rem;}

.contact-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:3rem;align-items:start;}
@media (max-width:820px){.contact-grid{grid-template-columns:1fr;gap:2.5rem;}}

.cform-card{border:1px solid var(--rule);padding:1.6rem 1.7rem;}
.cform-card h3{margin:0 0 1.2rem;font-size:1.08rem;font-weight:600;letter-spacing:-.01em;padding-bottom:.75rem;border-bottom:1px solid var(--rule);}
.cform label{display:block;font-family:Archivo;font-weight:500;font-size:.8rem;color:var(--slate);margin-bottom:.3rem;}
.cform input,.cform textarea{
  width:100%;font-family:Archivo;font-size:.95rem;color:var(--ink);
  background:#fff;border:1px solid var(--rule);padding:.6rem .7rem;margin-bottom:1rem;
  border-radius:0;
}
.cform textarea{resize:vertical;min-height:7rem;}
.cform input:focus,.cform textarea:focus{outline:2px solid var(--maroon);outline-offset:0;border-color:var(--maroon);}
.cform button{
  font-family:Archivo;font-weight:500;font-size:.95rem;letter-spacing:.02em;
  background:var(--maroon);color:#fff;border:1px solid var(--maroon);
  padding:.7rem 1.6rem;cursor:pointer;
}
.cform button:hover{background:var(--gold);border-color:var(--gold);color:var(--ink);}
.cform .note{font-family:Archivo;font-size:.8rem;color:var(--slate);margin:.9rem 0 0;}

/* ---------- FOOTER ---------- */
.foot{padding:2rem 0 3rem;font-family:Archivo;font-size:.85rem;color:var(--slate);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;border-top:1px solid var(--rule);}
.foot a{color:var(--slate);}

/* One page-load reveal, and nothing else. */
@keyframes rise{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.hero h1,.hero .lede,.hero .btns{animation:rise .55s ease-out both;}
.hero .lede{animation-delay:.07s;}
.hero .btns{animation-delay:.14s;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .hero h1,.hero .lede,.hero .btns{animation:none;}
}
@media print{.nav,.btns,.topbar{display:none;}}