/* ============================================================
   Ouail Zakary — Personal Academic Website
   Warm Serif · Slate Blue · #2d6a8a
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ac: #2d6a8a;
  --ac-light: #e8f2f7;
  --bg: #fdfbf7;
  --bg-side: #f5f0e8;
  --bg-card: #fefcf9;
  --bg-footer: #f0ebe0;
  --bg-footer-bot: #e5dfd2;
  --border: #e8e2d8;
  --border-light: #ede8e0;
  --border-warm: #e0d8cc;
  --text: #1a1a1a;
  --text-mid: #444;
  --text-muted: #666;
  --text-faint: #888;
  --text-footer: #4a3f30;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Arial, Helvetica, sans-serif;
}

html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--ac); text-decoration: underline; }
a:hover { color: #1a4f66; }

/* ── NAVIGATION ── */
.sitenav {
  background: var(--bg);
  border-bottom: 2px solid var(--text);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 40px;
  flex-wrap: wrap;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.sitenav-name {
  font-size: 18px;
  color: var(--text);
  font-weight: bold;
  font-family: var(--serif);
  text-decoration: none;
}
.sitenav-name:hover { color: var(--ac); }
.sitenav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: baseline;
}
.sitenav-links a {
  font-size: 11px;
  font-family: var(--sans);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  text-decoration: none;
  padding-bottom: 2px;
}
.sitenav-links a:hover,
.sitenav-links a.active {
  color: var(--ac);
  border-bottom: 1.5px solid var(--ac);
}

/* ── MAIN CONTENT WRAPPER ── */
main { flex: 1; }
.inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 40px;
}
.inner h2 {
  font-size: 24px;
  color: var(--text);
  font-weight: normal;
  margin-bottom: 4px;
}
.page-sub {
  font-size: 11px;
  font-family: var(--sans);
  color: var(--ac);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 26px;
}
.intro-p {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 14px;
}
.section-label {
  font-size: 11px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-faint);
  margin-bottom: 14px;
  font-weight: 700;
  margin-top: 4px;
}
.hr { border: none; border-top: 1px solid var(--border-light); margin: 22px 0; }

/* ── SEC TITLE (news heading style) ── */
.sec-title {
  font-size: 11px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--ac);
  font-weight: 700;
  border-left: 3px solid var(--ac);
  padding-left: 8px;
}

/* ── HERO (home page) ── */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 40px 32px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  gap: 32px;
  align-items: flex-start;
}
.hero-photo {
  width: 130px;
  height: 155px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid var(--border-warm);
  object-fit: cover;
  object-position: center top;
  display: block;
}
.hero-photo-placeholder {
  width: 130px;
  height: 155px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid var(--border-warm);
  background: #d8d0c4;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #8a8070;
  font-family: var(--serif);
}
.hero-text h1 {
  font-size: 28px;
  color: var(--text);
  font-weight: normal;
  margin-bottom: 5px;
}
.hero-pos {
  font-size: 12px;
  font-family: var(--sans);
  color: var(--ac);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 16px;
}
.hero-text p {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 13px;
}
.kw-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 4px; }
.kw {
  font-size: 11px;
  font-family: var(--sans);
  border: 1px solid #ccc;
  color: #555;
  padding: 3px 10px;
  border-radius: 2px;
}

/* ── NEWS SECTION ── */
.news-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 30px 40px;
}
.news-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-row { display: flex; gap: 6px; flex-wrap: wrap; }
.ftag {
  font-size: 10px;
  font-family: var(--sans);
  padding: 3px 11px;
  border: 1px solid #ccc;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-muted);
  background: var(--bg);
  transition: all 0.15s;
}
.ftag:hover, .ftag.on {
  background: var(--ac);
  color: #fff;
  border-color: var(--ac);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.ni {
  border: 1px solid var(--border-light);
  padding: 15px;
  border-radius: 2px;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
}
.ni.hidden { display: none; }
.ntag {
  display: inline-block;
  font-size: 9px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 2px;
  margin-bottom: 7px;
  font-weight: 600;
}
.t-pub  { background: #e8f2f7; color: #2d6a8a; }
.t-conf { background: #ede8f7; color: #4a3d7a; }
.t-award{ background: #e8f5ee; color: #2d5a3d; }
.t-pre  { background: #f5f0e0; color: #7a5a1a; }
.t-grant{ background: #f5e8e8; color: #7a2d2d; }
.ndate {
  font-size: 10px;
  font-family: var(--sans);
  color: var(--ac);
  font-weight: 700;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.ntitle {
  font-size: 13px;
  color: var(--text);
  font-weight: bold;
  margin-bottom: 7px;
  line-height: 1.4;
}
.ndesc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 9px;
  font-family: var(--sans);
  flex: 1;
}
.nread {
  font-size: 11px;
  font-family: var(--sans);
  color: var(--ac);
  cursor: pointer;
  text-decoration: underline;
  margin-top: auto;
  background: none;
  border: none;
  padding: 0;
}
.show-more-btn {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 10px;
  font-size: 12px;
  font-family: var(--sans);
  background: transparent;
  border: 1px solid #ccc;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-muted);
  text-align: center;
  transition: all 0.15s;
}
.show-more-btn:hover { border-color: var(--ac); color: var(--ac); }

/* ── EXPANDABLE CARDS ── */
.xcard {
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-card);
  margin-bottom: 20px;
  overflow: hidden;
}
.xhd {
  padding: 17px 22px 15px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  transition: background 0.15s;
}
.xhd:hover { background: #faf7f2; }
.xmeta { flex: 1; }
.xnum {
  font-size: 10px;
  font-family: var(--sans);
  color: #bbb;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 5px;
}
.xtitle {
  font-size: 15px;
  color: var(--text);
  font-weight: bold;
  line-height: 1.5;
  margin-bottom: 5px;
}
.xauth {
  font-size: 12px;
  font-family: var(--sans);
  color: var(--text-muted);
  margin-bottom: 4px;
  line-height: 1.5;
}
.xauth strong { color: var(--text); }
.xjrnl {
  font-size: 12px;
  font-family: var(--sans);
  color: var(--ac);
  font-style: italic;
  margin-bottom: 5px;
}
.xbadge {
  font-size: 9px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 2px 9px;
  border-radius: 2px;
  font-weight: 700;
  display: inline-block;
  margin-top: 2px;
  margin-right: 4px;
}
.b-pub   { background: #e8f2f7; color: #2d6a8a; }
.b-pre   { background: #f5f0e0; color: #7a5a1a; }
.b-cov   { background: #e8f5ee; color: #2d5a3d; }
.b-talk  { background: #ede8f7; color: #4a3d7a; }
.b-poster{ background: #f5e8f0; color: #7a2d5a; }
.xtog {
  font-size: 22px;
  color: #bbb;
  flex-shrink: 0;
  font-family: var(--sans);
  line-height: 1;
  margin-top: 2px;
  user-select: none;
}
.xbody {
  display: none;
  border-top: 1px solid var(--border-light);
}
.xbody.open { display: block; }
.pub-inner { padding: 20px 22px 18px; }

/* graphical abstract float */
.ga {
  float: right;
  margin: 0 0 14px 22px;
  width: 210px;
  border: 1px solid var(--border-warm);
  border-radius: 2px;
  background: var(--bg-side);
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
}
.ga img {
  width: 100%;
  height: 145px;
  object-fit: cover;
  display: block;
}
.ga-placeholder {
  width: 100%;
  height: 145px;
  background: #e8e0d4;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a09080;
  font-size: 13px;
  font-family: var(--sans);
}
.ga-cap {
  font-size: 9px;
  font-family: var(--sans);
  color: #999;
  text-align: center;
  padding: 5px 7px;
  border-top: 1px solid var(--border-warm);
  line-height: 1.4;
}
.albl {
  font-size: 10px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #999;
  margin-bottom: 8px;
  font-weight: 700;
}
.atxt {
  font-size: 13.5px;
  color: var(--text-mid);
  line-height: 1.85;
  text-align: justify;
}
.cf { clear: both; }

/* links row below abstract */
.xlinks {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  margin-top: 8px;
}
.xl {
  font-size: 11px;
  font-family: var(--sans);
  padding: 6px 14px;
  border: 1px solid #ccc;
  border-radius: 2px;
  color: #555;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  background: var(--bg);
  transition: all 0.15s;
}
.xl:hover { border-color: var(--ac); color: var(--ac); }
.xl.doi {
  border-color: var(--ac);
  color: var(--ac);
  font-weight: 600;
}
.xl.doi:hover { background: var(--ac); color: #fff; }
.xl.dim { color: #ccc; cursor: default; border-color: #eee; pointer-events: none; }

/* ── RESEARCH CARDS ── */
.rhd { display: flex; align-items: center; gap: 18px; flex: 1; }
.rthumb {
  width: 54px;
  height: 54px;
  border-radius: 2px;
  background: var(--bg-side);
  border: 1px solid var(--border-warm);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.rthumb img { width: 100%; height: 100%; object-fit: cover; }
.rshort {
  font-size: 12px;
  font-family: var(--sans);
  color: var(--text-faint);
  line-height: 1.5;
  margin-top: 3px;
}
.rbody-inner {
  padding: 22px 22px 20px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
}
.rimg {
  width: 210px;
  flex-shrink: 0;
  border: 1px solid var(--border-warm);
  border-radius: 2px;
  background: var(--bg-side);
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
}
.rimg img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  display: block;
}
.rimg-placeholder {
  width: 100%;
  height: 150px;
  background: #e8e0d4;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #a09080;
  font-size: 12px;
  font-family: var(--sans);
  text-align: center;
  padding: 10px;
}
.rimg-cap {
  font-size: 9px;
  font-family: var(--sans);
  color: #999;
  text-align: center;
  padding: 5px 8px;
  border-top: 1px solid var(--border-warm);
  line-height: 1.4;
}
.rright { flex: 1; }
.plbl {
  font-size: 10px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #999;
  margin-bottom: 10px;
  font-weight: 700;
  margin-top: 18px;
}
.pref { padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.pref:last-child { border-bottom: none; }
.pref .pt { font-size: 13px; color: var(--text); line-height: 1.5; margin-bottom: 2px; }
.pref .pj { font-size: 11px; font-family: var(--sans); color: var(--ac); margin-bottom: 1px; }
.pref .pa { font-size: 11px; font-family: var(--sans); color: var(--text-faint); }
.pref .pdoi {
  font-size: 11px;
  font-family: var(--sans);
  color: var(--ac);
  text-decoration: underline;
  cursor: pointer;
  margin-top: 3px;
  display: inline-block;
}

/* ── TEACHING ── */
.ti { margin-bottom: 18px; }
.ti .tt { font-size: 14px; color: var(--text); font-weight: bold; margin-bottom: 3px; }
.ti .td { font-size: 12px; font-family: var(--sans); color: var(--text-faint); margin-bottom: 5px; }
.ti .tb { font-size: 13px; color: var(--text-mid); line-height: 1.7; }
.rb {
  font-size: 9px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 2px 9px;
  border-radius: 2px;
  font-weight: 700;
  display: inline-block;
  margin-right: 6px;
}
.rb-s { background: #e8f5ee; color: #2d5a3d; }
.rb-t { background: #e8f2f7; color: #2d6a8a; }

/* ── SOFTWARE ── */
.sw {
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-card);
  padding: 18px 20px;
  margin-bottom: 18px;
}
.sw .st { font-size: 15px; color: var(--text); font-weight: bold; margin-bottom: 5px; }
.sw .sd { font-size: 13px; font-family: var(--sans); color: var(--text-muted); line-height: 1.65; margin-bottom: 8px; }
.sw .sm { font-size: 12px; font-family: var(--sans); color: var(--text-faint); margin-bottom: 8px; }
.stag {
  font-size: 10px;
  font-family: var(--sans);
  background: #f0ebe0;
  color: #6a5a40;
  padding: 2px 9px;
  border-radius: 2px;
  display: inline-block;
  margin-right: 5px;
  margin-top: 2px;
}

/* ── GRANTS & COLLABORATIONS ── */
.gi { margin-bottom: 18px; }
.gi .gt { font-size: 15px; color: var(--text); font-weight: bold; margin-bottom: 3px; }
.gi .gd { font-size: 12px; font-family: var(--sans); color: var(--ac); margin-bottom: 5px; }
.gi .gb { font-size: 13px; color: var(--text-mid); line-height: 1.7; }
.cc {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
  border: 1px solid var(--border-light);
  padding: 15px;
  border-radius: 2px;
  background: var(--bg-card);
}
.cav {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--border-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #8a8070;
  font-family: var(--serif);
  flex-shrink: 0;
  font-weight: bold;
}
.cn { font-size: 14px; color: var(--text); font-weight: bold; margin-bottom: 2px; }
.ci { font-size: 12px; font-family: var(--sans); color: var(--text-faint); margin-bottom: 4px; }
.ct { font-size: 13px; font-family: var(--sans); color: var(--text-muted); line-height: 1.6; }

/* ── CV PAGE ── */
.cv-dl { display: flex; gap: 14px; margin-bottom: 26px; flex-wrap: wrap; }
.cvb {
  border: 1px solid var(--border-light);
  padding: 18px 24px;
  border-radius: 3px;
  background: var(--bg-card);
  cursor: pointer;
  text-decoration: none;
  display: block;
  transition: border-color 0.15s;
}
.cvb:hover { border-color: var(--ac); }
.cvb .cbt { font-size: 14px; color: var(--text); font-weight: bold; margin-bottom: 4px; }
.cvb .cbd { font-size: 12px; font-family: var(--sans); color: var(--ac); }
.profile-links { font-size: 14px; font-family: var(--sans); color: var(--text-muted); line-height: 2.6; }

/* ── COLLAB NOTE ── */
.collab-note {
  font-size: 13px;
  font-family: var(--sans);
  color: var(--text-faint);
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
  line-height: 1.8;
}

/* ── FOOTER ── */
.footer {
  background: var(--bg-footer);
  padding: 30px 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  border-top: 2px solid var(--ac);
}
.fs h4 {
  font-size: 10px;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--ac);
  margin-bottom: 12px;
  font-weight: 700;
}
.fs p, .fs a {
  font-size: 13px;
  font-family: var(--sans);
  color: var(--text-footer);
  line-height: 2;
  display: block;
  text-decoration: none;
}
.fs a:hover { color: var(--text); text-decoration: underline; }
.fbot {
  background: var(--bg-footer-bot);
  padding: 10px 40px;
  font-size: 11px;
  font-family: var(--sans);
  color: #8a7f6e;
  text-align: center;
  border-top: 1px solid var(--border-warm);
}

/* ── RESPONSIVE ── */
@media (max-width: 760px) {
  .sitenav { padding: 12px 20px; }
  .sitenav-links { gap: 10px; }
  .hero { padding: 24px 20px; flex-direction: column; }
  .inner { padding: 28px 20px; }
  .news-wrap { padding: 22px 20px; }
  .news-grid { grid-template-columns: 1fr; }
  .footer { grid-template-columns: 1fr; padding: 24px 20px; }
  .fbot { padding: 10px 20px; }
  .rbody-inner { flex-direction: column; }
  .rimg { width: 100%; }
  .ga { float: none; width: 100%; margin: 0 0 16px 0; }
}