/* =====================================================================
   Prof. Mamdouh Alenezi — site design system
   Light editorial: warm paper, deep ink, one accent (evergreen).
   ===================================================================== */

:root{
  /* colour */
  --paper:#fbfaf7;
  --paper-2:#f4f2ed;
  --surface:#ffffff;
  --ink:#15181d;
  --ink-2:#3b424e;
  --muted:#6b7383;
  --line:#e4e0d8;
  --line-2:#efece6;
  --accent:#0f5646;
  --accent-ink:#0a4034;
  --accent-wash:#edf3f0;
  --accent-line:#cfe0d9;

  /* type */
  --display:"Fraunces",Iowan Old Style,Georgia,serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;

  /* metrics */
  --max:1120px;
  --gut:clamp(20px,5vw,40px);
  --radius:14px;
  --radius-sm:10px;
  --nav-h:66px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  font-synthesis-weight:none;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (max-width:640px){body{font-size:16px}}
img{max-width:100%;height:auto;display:block}
::selection{background:var(--accent);color:#fff}

h1,h2,h3,h4{font-family:var(--display);font-weight:600;line-height:1.14;letter-spacing:-.015em;margin:0;color:var(--ink)}
h1{font-size:clamp(2.15rem,1.4rem + 3.2vw,3.5rem)}
h2{font-size:clamp(1.65rem,1.2rem + 1.9vw,2.4rem)}
h3{font-size:1.16rem;line-height:1.3}
p{margin:0 0 1.05em}
a{color:var(--accent);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
ul,ol{margin:0;padding:0}
figure{margin:0}
strong{font-weight:600;color:var(--ink)}
hr{border:0;border-top:1px solid var(--line);margin:0}

:where(a,button,input,summary):focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:4px
}

.wrap{max-width:var(--max);margin-inline:auto;padding-inline:var(--gut)}
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--accent);color:#fff;padding:.7rem 1.1rem;font-weight:600}
.skip:focus{left:0}

/* ---------- eyebrow / section heads ---------- */
.eyebrow{
  display:block;font-family:var(--sans);font-size:.72rem;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 .85rem
}
.sec{padding:clamp(3.5rem,7vw,6rem) 0}
.sec--tint{background:var(--paper-2);border-block:1px solid var(--line)}
.sec-head{max-width:44rem;margin-bottom:clamp(2rem,4vw,3rem)}
.sec-head p{color:var(--ink-2);margin:.85rem 0 0;font-size:1.03rem}
.lede{font-size:clamp(1.05rem,1rem + .4vw,1.22rem);color:var(--ink-2);line-height:1.6}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:60;background:rgba(251,250,247,.88);
  backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid var(--line)
}
.site-head__in{
  max-width:var(--max);margin-inline:auto;padding-inline:var(--gut);
  height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:1rem
}
.brand{font-family:var(--display);font-size:1.06rem;font-weight:600;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand:hover{text-decoration:none;color:var(--accent)}
.brand span{color:var(--accent)}
.nav{display:flex;align-items:center;gap:1.6rem;list-style:none;margin:0}
.nav a{
  color:var(--ink-2);font-size:.88rem;font-weight:500;padding:.35rem 0;position:relative
}
.nav a:hover{color:var(--ink);text-decoration:none}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease
}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--ink);font-weight:600}

.nav a.nav-cta{
  display:inline-flex;align-items:center;gap:.4rem;border:1px solid var(--accent);color:var(--accent)!important;
  padding:.45rem 1.05rem;border-radius:999px;font-size:.83rem;font-weight:600;white-space:nowrap
}

.nav a.nav-cta:hover{background:var(--accent);color:#fff!important;text-decoration:none}
.nav a.nav-cta::after{display:none}
.menu-btn{
  display:none;background:var(--surface);border:1px solid var(--line);border-radius:9px;
  padding:.45rem .6rem;cursor:pointer;color:var(--ink);line-height:0
}
.menu-btn svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round}
@media (max-width:900px){
  .menu-btn{display:block}
  .nav{
    position:absolute;top:var(--nav-h);left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);padding:.4rem var(--gut) 1rem;
    box-shadow:0 18px 40px -28px rgba(0,0,0,.4);display:none
  }
  .nav.open{display:flex}
  .nav li{border-top:1px solid var(--line-2)}
  .nav li:first-child{border-top:0}
  .nav a{display:block;padding:.85rem 0;font-size:.98rem}
  .nav a::after{display:none}
  .nav a.nav-cta{margin-top:.9rem;justify-content:center;padding:.7rem 1rem;font-size:.92rem}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;padding:.78rem 1.35rem;border-radius:999px;
  font-size:.92rem;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease
}
.btn:hover{text-decoration:none}
.btn--solid{background:var(--accent);color:#fff}
.btn--solid:hover{background:var(--accent-ink)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn--sm{padding:.55rem 1rem;font-size:.85rem}
.btn svg{width:15px;height:15px;fill:currentColor;flex:none}
.btn-row{display:flex;flex-wrap:wrap;gap:.75rem}

/* ---------- hero ---------- */
.hero{padding:clamp(2.8rem,6vw,5.2rem) 0 clamp(2.5rem,5vw,4rem);position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:auto auto 0 50%;translate:-50% 0;width:min(1300px,140vw);height:520px;
  background:radial-gradient(60% 60% at 70% 20%,rgba(15,86,70,.06),transparent 70%);pointer-events:none
}
.hero__grid{display:grid;grid-template-columns:1.35fr .65fr;gap:clamp(2rem,5vw,4.5rem);align-items:center;position:relative}
.hero__grid--top{align-items:start}
.hero h1{margin-bottom:1.15rem}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero__role{
  font-size:1.02rem;font-weight:600;color:var(--ink);margin:0 0 1.1rem;
  display:flex;flex-wrap:wrap;gap:.4rem .7rem;align-items:baseline
}
.hero__role span{color:var(--muted);font-weight:400}
.hero .lede{max-width:36rem;margin-bottom:1.9rem}
.hero .btn-row{margin-bottom:1.9rem}

.portrait{position:relative;justify-self:center;max-width:320px;width:100%}
.portrait img{
  border-radius:var(--radius);border:1px solid var(--line);background:var(--surface);
  box-shadow:0 30px 60px -40px rgba(20,24,30,.45)
}
.portrait figcaption{
  margin-top:.85rem;font-size:.78rem;color:var(--muted);letter-spacing:.02em;text-align:center
}
@media (max-width:860px){
  .hero__grid{grid-template-columns:1fr;gap:2.2rem}
  .portrait{order:-1;justify-self:start;max-width:180px}
  .portrait figcaption{text-align:left}
}

/* ---------- profile links ---------- */
.profiles{display:flex;flex-wrap:wrap;gap:.55rem;list-style:none}
.profiles a{
  display:inline-flex;align-items:center;gap:.45rem;font-size:.83rem;font-weight:500;color:var(--ink-2);
  border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:.42rem .9rem
}
.profiles a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.profiles svg{width:14px;height:14px;fill:currentColor;flex:none}

/* ---------- metrics ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden
}
.metric{padding:1.5rem 1.25rem;border-left:1px solid var(--line-2)}
.metric:first-child{border-left:0}
.metric b{display:block;font-family:var(--display);font-size:2rem;font-weight:600;line-height:1.05;color:var(--accent)}
.metric span{display:block;margin-top:.3rem;font-size:.82rem;font-weight:600;color:var(--ink)}
.metric small{display:block;font-size:.74rem;color:var(--muted)}
@media (max-width:700px){
  .metric{border-left:0;border-top:1px solid var(--line-2)}
  .metric:first-child{border-top:0}
}

/* ---------- cards ---------- */
.grid{display:grid;gap:1.1rem}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(255px,1fr))}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:1.6rem 1.5rem;transition:border-color .2s ease,transform .2s ease
}
.card:hover{border-color:var(--accent-line)}
.card h3{margin-bottom:.5rem}
.card p{color:var(--ink-2);font-size:.95rem;margin:0}
.card p + p{margin-top:.7rem}
.card__num{
  display:block;font-family:var(--display);font-size:.85rem;color:var(--accent);margin-bottom:.9rem;letter-spacing:.06em
}
.card__link{display:inline-flex;align-items:center;gap:.35rem;margin-top:1rem;font-size:.87rem;font-weight:600}
.card__link svg,.pub__links svg,.rows svg{width:14px;height:14px;fill:currentColor;flex:none}
a.card{display:block;color:inherit}
a.card:hover{text-decoration:none;transform:translateY(-2px)}
a.card h3{color:var(--ink)}
a.card:hover h3{color:var(--accent)}

/* ---------- bullets ---------- */
.bullets{list-style:none;display:grid;gap:.6rem}
.bullets li{position:relative;padding-left:1.35rem;color:var(--ink-2);font-size:.97rem}
.bullets li::before{
  content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.55
}
.bullets strong{color:var(--ink)}

/* ---------- timeline ---------- */
.timeline{list-style:none;position:relative;margin-left:2px}
.timeline::before{content:"";position:absolute;left:5px;top:.7rem;bottom:.7rem;width:1px;background:var(--line)}
.tl{position:relative;padding:0 0 2.6rem 2.1rem}
.tl:last-child{padding-bottom:0}
.tl::before{
  content:"";position:absolute;left:0;top:.55rem;width:11px;height:11px;border-radius:50%;
  background:var(--paper);border:2px solid var(--accent)
}
.tl__date{font-size:.76rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.tl h3{margin:.3rem 0 .15rem;font-size:1.24rem}
.tl__org{font-size:.92rem;color:var(--accent);font-weight:500}
.tl .bullets{margin-top:.85rem}
.tags{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.9rem;list-style:none}
.tags li{
  font-size:.73rem;letter-spacing:.03em;color:var(--ink-2);background:var(--accent-wash);
  border:1px solid var(--accent-line);border-radius:999px;padding:.2rem .68rem
}

/* ---------- definition rows ---------- */
.rows{list-style:none;border-top:1px solid var(--line)}
.rows li{
  border-bottom:1px solid var(--line);padding:1.15rem 0;
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:.4rem 1.5rem;align-items:baseline
}
.rows b{font-weight:600;font-size:1rem}
.rows span{color:var(--muted);font-size:.85rem;white-space:nowrap}
.rows p{margin:.3rem 0 0;grid-column:1/-1;color:var(--ink-2);font-size:.93rem}
@media (max-width:600px){
  .rows li{grid-template-columns:1fr}
  .rows span{white-space:normal}
}

/* ---------- publications ---------- */
.pub-controls{
  display:grid;gap:1rem;margin-bottom:1.6rem;
  grid-template-columns:minmax(0,1fr) auto;align-items:center
}
@media (max-width:760px){.pub-controls{grid-template-columns:1fr}}
.field{position:relative;display:flex;align-items:center}
.field svg{position:absolute;left:.9rem;width:16px;height:16px;fill:none;stroke:var(--muted);stroke-width:2}
.field input{
  width:100%;font:inherit;font-size:.95rem;padding:.75rem 1rem .75rem 2.5rem;
  border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink)
}
.field input::placeholder{color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:.45rem;list-style:none}
.chip{
  font:inherit;font-size:.84rem;font-weight:500;padding:.5rem .95rem;border-radius:999px;cursor:pointer;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2)
}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.pub-count{font-size:.85rem;color:var(--muted);margin:0 0 1.2rem}
.pubs{list-style:none;border-top:1px solid var(--line)}
.pub{padding:1.15rem 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:4.5rem minmax(0,1fr);gap:0 1.2rem}
.pub__year{font-family:var(--display);font-size:.95rem;color:var(--muted);padding-top:.15rem}
.pub__title{font-size:1.02rem;font-weight:600;line-height:1.4;margin:0 0 .3rem;color:var(--ink)}
.pub__title a{color:inherit}
.pub__title a:hover{color:var(--accent)}
.pub__meta{font-size:.87rem;color:var(--muted);margin:0}
.pub__meta em{font-style:normal;color:var(--ink-2)}
.pub__links{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:.45rem;font-size:.8rem;font-weight:600}
.pub__kind{
  display:inline-block;font-size:.68rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-wash);border-radius:4px;padding:.12rem .45rem;margin-left:.5rem;
  vertical-align:.12em
}
@media (max-width:600px){
  .pub{grid-template-columns:1fr;gap:.25rem}
  .pub__year{padding-top:0;font-size:.82rem;letter-spacing:.06em}
}
.empty{padding:2.5rem 0;color:var(--muted)}

/* ---------- callout / CTA ---------- */
.callout{
  background:var(--accent);color:#fff;border-radius:var(--radius);
  padding:clamp(2rem,4vw,3.2rem);display:grid;gap:1.4rem;justify-items:start
}
.callout h2{color:#fff}
.callout p{color:rgba(255,255,255,.82);max-width:38rem;margin:0}
.callout .btn--solid{background:#fff;color:var(--accent-ink)}
.callout .btn--solid:hover{background:rgba(255,255,255,.88)}
.callout .btn--ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.callout .btn--ghost:hover{border-color:#fff;color:#fff}

/* ---------- page header ---------- */
.page-head{padding:clamp(2.6rem,5vw,4rem) 0 clamp(1.6rem,3vw,2.4rem);border-bottom:1px solid var(--line)}
.page-head h1{max-width:22ch}
.page-head p{max-width:44rem;margin-top:1rem;color:var(--ink-2);font-size:1.05rem}
.crumbs{font-size:.8rem;color:var(--muted);margin:0 0 1rem}
.crumbs a{color:var(--muted)}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);background:var(--paper-2);padding:2.6rem 0 2rem;margin-top:0}
.site-foot__in{max-width:var(--max);margin-inline:auto;padding-inline:var(--gut);display:grid;gap:1.6rem}
.foot-nav{display:flex;flex-wrap:wrap;gap:.4rem 1.4rem;list-style:none}
.foot-nav a{color:var(--ink-2);font-size:.88rem}
.foot-bottom{display:flex;flex-wrap:wrap;gap:.6rem 1.5rem;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:1.4rem}
.foot-bottom p{margin:0;font-size:.82rem;color:var(--muted)}

/* ---------- motion ---------- */
/* Content is visible by default; the entrance animation is opt-in and only
   applied once JavaScript has confirmed it can also remove it again. */
.js .reveal{opacity:0;transform:translateY(14px)}
.js .reveal.is-in{opacity:1;transform:none;transition:opacity .5s ease,transform .5s ease}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .js .reveal{opacity:1;transform:none}
}

/* ---------- print ---------- */
@media print{
  .site-head,.menu-btn,.callout,.btn,.pub-controls{display:none!important}
  body{background:#fff;font-size:11pt}
  a{color:#000;text-decoration:none}
}