/* style.css — layout and colours. No need to edit; content lives in index.html and data.js. */

/* fonts:start — Literata and Fira Sans, served from this site (SIL Open Font License) */
/* Fira Sans italic 400 · latin-ext */
@font-face {
  font-family: 'Fira Sans';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/firasans-italic-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Fira Sans italic 400 · latin */
@font-face {
  font-family: 'Fira Sans';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/firasans-italic-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Fira Sans normal 400 · latin-ext */
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/firasans-normal-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Fira Sans normal 400 · latin */
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/firasans-normal-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Fira Sans normal 500 · latin-ext */
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/firasans-normal-500-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Fira Sans normal 500 · latin */
@font-face {
  font-family: 'Fira Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/firasans-normal-500-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Literata italic 400 · latin-ext */
@font-face {
  font-family: 'Literata';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/literata-italic-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Literata italic 400 · latin */
@font-face {
  font-family: 'Literata';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/literata-italic-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Literata normal 400 · latin-ext */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Literata normal 400 · latin */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Literata normal 500 · latin-ext */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Literata normal 500 · latin */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* Literata normal 600 · latin-ext */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* Literata normal 600 · latin */
@font-face {
  font-family: 'Literata';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/literata-normal-400-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* fonts:end */

:root{
  /* Bar-Ilan palette (names from biu.ac.il) */
  --paper:#F5FAF0;   /* pale green   */
  --sheet:#FFFFFF;
  --ink:#00280F;     /* dark forest  */
  --head:#004128;    /* Bar-Ilan green */
  --link:#006937;    /* jungle green */
  --mark:#DE5CB6;    /* BIU magenta, for marks only */
  --marki:#A8327F;   /* magenta dark enough for text */
  --mut:#52695B;
  --line:#D5E1D0;
  --sans:"Fira Sans","Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
*, *::before, *::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{margin:0; background:var(--paper); color:var(--ink);
  font-family:Literata, Georgia, "Times New Roman", serif; font-size:16.5px; line-height:1.65; -webkit-font-smoothing:antialiased;}
h1, h2, h3, p, dl, dd, ul, ol, figure{margin:0;}
ul, ol{list-style:none; padding:0;}
img{display:block; max-width:100%; height:auto;}
svg{display:block; width:100%; height:auto;}
a{color:var(--link);}
a:focus-visible{outline:2px solid var(--link); outline-offset:3px; border-radius:2px;}
i{font-style:italic;}
[hidden]{display:none !important;}   /* lets site.js hide grid/flex boxes too */
.defs{position:absolute; width:0; height:0; overflow:hidden;}
.skip{position:absolute; left:12px; top:-60px; z-index:10; background:var(--head); color:#fff; padding:8px 14px; border-radius:3px; font-family:var(--sans); font-size:14px; text-decoration:none;}
.skip:focus{top:12px;}
[tabindex="-1"]:focus{outline:none;}   /* programmatic focus targets (main, page headings) */
.vh{position:absolute; width:1px; height:1px; overflow:hidden; clip-path:inset(50%); white-space:nowrap;}

/* ---------- frame: masthead on top, menu in the left margin ---------- */
.site{display:grid; grid-template-columns:268px minmax(0,1fr); grid-template-rows:auto 1fr auto; grid-template-areas:"top top" "side main" "foot foot"; min-height:100vh;}

.who{grid-area:top; display:grid; grid-template-columns:minmax(0,1fr) auto; grid-template-areas:"nm aff";
  align-items:end; column-gap:40px; padding:44px 52px 30px 36px; background:var(--sheet); border-bottom:1px solid var(--line);}
.nm{grid-area:nm; font-size:54px; font-weight:500; letter-spacing:-.03em; line-height:.95; color:var(--head);}
.nm a{color:inherit; text-decoration:none;}
.aff{grid-area:aff; align-self:end; text-align:right; font-size:15px; font-style:italic; line-height:1.5; color:var(--mut);}
.aff span{display:block;}

.navcol{grid-area:side; align-self:start; position:sticky; top:0; display:grid; gap:24px; padding:40px 30px 40px 36px;}
.nav{display:grid; gap:1px; font-family:var(--sans);}
.nav a{font-size:15px; color:var(--mut); text-decoration:none; padding:5px 0 5px 17px; position:relative; transition:color .15s;}
.nav a:hover{color:var(--head);}
.nav a[aria-current="page"]{color:var(--head); font-weight:500;}
.nav a[aria-current="page"]::before{content:""; position:absolute; left:0; top:50%; width:7px; height:7px; margin-top:-3.5px; border-radius:50%; background:var(--mark);}
.side-contact{display:grid; gap:3px; font-family:var(--sans); font-size:13px; line-height:1.45; color:var(--mut); padding-top:20px; border-top:1px solid var(--line);}
.side-contact a{text-decoration:none;}
.side-contact .bio-link{margin-top:8px;}
.side-contact .sl{display:flex; flex-wrap:wrap; gap:2px 14px; margin-top:8px;}

.pages{grid-area:main; padding:50px 52px 60px; max-width:800px; min-width:0; border-left:1px solid var(--line);}
.foot{grid-area:foot; background:var(--head); font-family:var(--sans); font-size:13px; color:rgba(245,250,240,.8);}
.foot-in{padding:18px 36px; display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px 24px;}
.foot a{color:inherit; text-decoration:none;}
.foot a:focus-visible{outline-color:#F5FAF0;}
.foot-logo img{display:block; height:40px; width:auto;}

/* one page at a time once JavaScript runs; without it, every section shows */
.js .pg:not(.on){display:none;}

/* ---------- shared page parts ---------- */
.pg-head{margin-bottom:36px;}
.pg-head h1{font-size:40px; font-weight:600; letter-spacing:-.025em; line-height:1.08; color:var(--head); text-wrap:balance;}
.pg-head .lede{font-size:18px; font-style:italic; color:var(--mut); margin-top:12px; max-width:56ch; line-height:1.55;}
.h{font-family:var(--sans); font-size:12px; font-weight:500; letter-spacing:.15em; text-transform:uppercase; color:var(--link); margin-bottom:14px;}
.warn{font-family:var(--sans); font-size:14px; color:var(--marki); border:1px solid currentColor; padding:10px 14px; border-radius:4px;}

/* ---------- about ---------- */
.about-top{display:grid; grid-template-columns:minmax(0,1fr) 190px; gap:0 40px; align-items:start;}
.bio{display:grid; gap:12px;}
.portrait{width:190px; aspect-ratio:4/5; object-fit:cover; border-radius:2px;}
.contact{display:none;}
.about-cols{display:grid; gap:44px; margin-top:54px;}
.news-list li{display:grid; grid-template-columns:92px minmax(0,1fr); gap:18px; padding:8px 0; align-items:baseline;}
.news-list .d{font-family:var(--sans); font-size:12.5px; color:var(--mut); font-variant-numeric:tabular-nums;}
.news-list li.new .d{color:var(--marki); font-weight:500;}
.news-list li.new .d::before{content:""; display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--mark); margin-right:7px; vertical-align:1px;}
.service ul{display:grid; gap:8px;}
.service li span{font-family:var(--sans); font-size:13.5px; color:var(--mut); margin-left:8px;}

/* ---------- research ---------- */
.topic{padding-bottom:44px; margin-bottom:44px; border-bottom:1px solid var(--line);}
.hero{width:100%; aspect-ratio:1400/791; object-fit:cover; border-radius:3px; border:1px solid var(--line); background:var(--sheet); margin-bottom:22px;}
.topic-body{display:grid; grid-template-columns:minmax(0,1fr) 232px; gap:0 32px; align-items:start;}
.fig{background:var(--sheet); border:1px solid var(--line); padding:12px 12px 10px; margin:6px 0 0;}
.fig figcaption{font-family:var(--sans); font-size:12.5px; line-height:1.45; color:var(--mut); margin-top:8px;}
.recent{margin-top:18px; font-family:var(--sans); font-size:14px; line-height:1.5; color:var(--mut);}
.recent-h{font-size:11px; font-weight:500; letter-spacing:.14em; text-transform:uppercase; color:var(--link); margin-bottom:8px;}
.recent ul{display:grid; gap:7px;}
.recent a{text-decoration:none; border-bottom:1px solid var(--line);}
.recent a:hover{border-bottom-color:var(--link);}
.kicker{font-family:var(--sans); font-size:12px; font-weight:500; letter-spacing:.15em; text-transform:uppercase; color:var(--link); margin-bottom:6px;}
.topic h2{font-size:27px; font-weight:600; color:var(--head); line-height:1.2; letter-spacing:-.015em; margin-bottom:12px; text-wrap:balance;}
.more{display:inline-block; margin-top:12px; font-family:var(--sans); font-size:14px; text-decoration:none; border-bottom:1px solid currentColor;}
.also{font-style:italic;}
.rule{border:0; border-top:1px solid var(--line); margin:30px 0 14px;}
.fund{font-family:var(--sans); font-size:13.5px; color:var(--mut);}
.bio-page p{max-width:64ch;}
.bio-page p + p{margin-top:12px;}

.il-edge{stroke:var(--head); stroke-width:1.3; fill:none; stroke-linecap:round;}
.il-time{stroke:var(--head); stroke-width:1; stroke-dasharray:2 4; fill:none; opacity:.55;}
.il-node{fill:var(--sheet); stroke:var(--head); stroke-width:1.4;}
.il-hot{stroke:var(--mark); stroke-width:1.8; fill:none; stroke-linecap:round;}
.il-hotfill{fill:var(--mark);}
.il-dead{fill:var(--sheet); stroke:var(--mut); stroke-width:1.3; stroke-dasharray:2.5 2.5;}
.il-pulse{fill:var(--sheet); stroke:var(--mark); stroke-width:1.5;}
.il-arrow{fill:var(--head);}
.il-arrow-hot{fill:var(--mark);}
.il-arrow-route{fill:var(--link);}
.il-route{stroke:var(--link); stroke-width:1.4; fill:none; stroke-dasharray:4 4;}
.il-gone{stroke:var(--mut); stroke-width:1.2; fill:none; stroke-dasharray:3 4; opacity:.7;}
.il-path{stroke:var(--head); stroke-width:1.4; fill:none; stroke-dasharray:3 4;}
.il-city{fill:var(--paper); stroke:var(--head); stroke-width:1.3; stroke-linejoin:round;}
.il-dot{fill:var(--head);}
.il-lockb{fill:var(--head);}
.il-locks{fill:none; stroke:var(--head); stroke-width:1.4;}
.il-lbl{fill:var(--mut); font:italic 400 11.5px Literata, Georgia, serif;}
.il-math{fill:var(--head); font:italic 400 16px Literata, Georgia, serif;}

/* ---------- publications ---------- */
.chips{display:flex; flex-wrap:wrap; gap:6px 20px; margin-bottom:32px; font-family:var(--sans);}
.chip{font-size:14px; color:var(--mut); text-decoration:none; padding:2px 0; border-bottom:2px solid transparent;}
.chip:hover{color:var(--head);}
.chip[aria-current]{color:var(--head); border-bottom-color:var(--mark);}
.yr{display:grid; grid-template-columns:62px minmax(0,1fr); gap:22px; margin-bottom:34px;}
.y{font-family:var(--sans); font-size:14px; font-weight:500; color:var(--head); font-variant-numeric:tabular-nums; border-top:2px solid var(--head); padding-top:4px; align-self:start;}
.yr-list{display:grid; gap:22px;}
.pt{font-size:18.5px; font-weight:500; line-height:1.35; color:var(--head);}
.pa{font-family:var(--sans); font-size:14px; color:var(--mut); margin-top:3px;}
.pa .me{color:var(--ink);}
.pb{margin-top:6px; font-size:16px;}
.pv{margin-top:4px; font-size:15.5px;}
.v + .v::before{content:" · "; color:var(--mut);}
.pl{display:flex; flex-wrap:wrap; gap:4px 14px; margin-top:5px; font-family:var(--sans); font-size:13.5px;}
.pl a{text-decoration:none; border-bottom:1px solid var(--line);}
.pl a:hover{border-bottom-color:var(--link);}

/* ---------- teaching ---------- */
.courses{display:grid; gap:24px; margin-bottom:44px;}
.course{display:grid; grid-template-columns:62px minmax(0,1fr); gap:3px 22px; align-items:baseline;}
.cn{font-family:var(--sans); font-size:13px; font-weight:500; color:var(--link); font-variant-numeric:tabular-nums;}
.course h3{font-size:20px; font-weight:500; color:var(--head); line-height:1.3;}
.lvl{font-size:15px; font-style:italic; font-weight:400; color:var(--mut); margin-left:6px;}
.course p{margin-top:3px;}
.ct{grid-column:2; font-family:var(--sans); font-size:13px; color:var(--mut); font-variant-numeric:tabular-nums;}

/* ---------- students ---------- */
.people{display:grid; gap:30px; margin-bottom:46px;}
.person{display:grid; grid-template-columns:84px minmax(0,1fr); gap:24px; align-items:start;}
.person img{width:84px; height:106px; object-fit:cover; border-radius:2px;}
.person h3{font-size:21px; font-weight:600; color:var(--head); line-height:1.25;}
.role{font-family:var(--sans); font-size:13px; color:var(--mut); margin-top:2px;}
.ab{margin-top:8px;}
.now{margin-top:6px; font-style:italic;}
.openings{background:var(--sheet); border:1px solid var(--line); padding:26px 30px; display:grid; gap:18px;}
.openings .h{margin-bottom:0;}
.op h3{font-size:19px; font-weight:600; color:var(--head); margin-bottom:4px;}

/* ---------- phones ---------- */
@media (max-width: 760px){
  body{font-size:16px;}
  .site{grid-template-columns:1fr; grid-template-rows:auto auto 1fr auto; grid-template-areas:"top" "side" "main" "foot";}
  .who{grid-template-columns:1fr; grid-template-areas:"nm" "aff"; padding:22px 20px 16px; row-gap:10px;}
  .nm{font-size:34px;}
  .aff{text-align:left; font-size:13px; line-height:1.45;}
  .aff span{display:inline;}
  .aff span + span::before{content:" · ";}
  .navcol{position:static; padding:8px 20px 10px; gap:0; border-bottom:1px solid var(--line);}
  .nav{display:flex; flex-wrap:wrap; gap:0 18px;}
  .nav a{font-size:14.5px; padding:8px 0 8px 14px;}
  .side-contact{display:none;}
  .pages{border-left:0;}
  .pages{padding:30px 20px 40px;}
  .foot-in{padding:16px 20px 22px;}
  .foot-logo img{height:34px;}

  .pg-head h1{font-size:32px;}
  .about-top{grid-template-columns:1fr; gap:20px;}
  .portrait{width:150px; order:-1;}
  .contact{display:block; font-family:var(--sans); font-size:14px; margin-top:34px;}
  .contact dl{display:grid; gap:8px;}
  .contact dt{font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--mut);}
  .contact a{text-decoration:none;}
  .contact .bio-link{margin-top:12px;}
  .links{display:flex; gap:16px; margin-top:10px;}
  .news-list li{grid-template-columns:1fr; gap:0;}
  .service li span{display:block; margin-left:0;}
  .topic-body{grid-template-columns:1fr; gap:16px;}
  .fig{max-width:340px;}
  .topic h2{font-size:23px;}
  .chip{padding:7px 0;}
  .yr{grid-template-columns:1fr; gap:12px;}
  .y{justify-self:start; padding-right:18px;}
  .course{grid-template-columns:1fr;}
  .ct{grid-column:1;}
  .person{grid-template-columns:64px minmax(0,1fr); grid-template-areas:"img name" "img role" "ab ab" "now now"; column-gap:16px; row-gap:0;}
  .person > div{display:contents;}
  .person img{grid-area:img; width:64px; height:80px;}
  .person h3{grid-area:name; align-self:end;}
  .person .role{grid-area:role; align-self:start;}
  .person .ab{grid-area:ab; margin-top:14px;}
  .person .now{grid-area:now;}
  .openings{padding:22px 20px;}
}