/* ============================================================
   Hammad Mobin — PhD academic site
   Palette:  ink #14213D | paper #FBFAF7 | slate #4A5468
             signal (amber) #E0A458 | line #E4E0D8
   Type:     Fraunces (display/serif)  ·  Inter (body/sans)
   ============================================================ */

:root {
  --ink:     #14213D;
  --ink-2:   #26324f;
  --paper:   #FBFAF7;
  --slate:   #4A5468;
  --signal:  #C6772F;
  --signal-soft: #E0A458;
  --line:    #E4E0D8;
  --card:    #FFFFFF;
  --sidebar-w: 280px;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--signal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: var(--ink);
  color: #EDEBE4;
  padding: 44px 30px;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.content {
  flex: 1;
  padding: 72px 8vw 96px;
  max-width: calc(var(--maxw) + 16vw);
}

/* ---------- Sidebar identity ---------- */
.portrait {
  width: 118px; height: 118px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 3px solid rgba(224,164,88,.55);
  margin-bottom: 20px;
}
.side-name {
  font-family: "Fraunces", Georgia, serif;
  font-size: 25px;
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 4px;
  color: #fff;
}
.side-role {
  font-size: 13.5px;
  color: #A9B1C6;
  margin: 0 0 26px;
  line-height: 1.45;
}

/* ---------- Nav ---------- */
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav a {
  color: #D9DCE6;
  font-size: 15px;
  font-weight: 500;
  padding: 9px 12px;
  border-radius: 7px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  transition: background .15s, color .15s;
}
.nav a:hover { background: rgba(255,255,255,.06); text-decoration: none; color: #fff; }
.nav a.active { background: rgba(224,164,88,.16); color: #fff; }
.nav a .n {
  font-family: "Fraunces", serif;
  font-size: 12px;
  color: var(--signal-soft);
  width: 20px;
}

.side-foot {
  margin-top: auto;
  padding-top: 26px;
  font-size: 12.5px;
  color: #8A93AB;
  line-height: 1.7;
}
.side-foot a { color: #C3C9D8; }

/* ---------- Page headers ---------- */
.eyebrow {
  font-size: 13px;
  color: var(--signal);
  font-weight: 600;
  letter-spacing: .02em;
  margin: 0 0 10px;
}
h1.page {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -.01em;
  margin: 0 0 24px;
}
.lede {
  font-size: 20px;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: var(--maxw);
  margin: 0 0 40px;
}

.content p, .content li { max-width: var(--maxw); }

h2 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 27px;
  letter-spacing: -.01em;
  margin: 54px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  max-width: var(--maxw);
}
h3 {
  font-size: 18px;
  font-weight: 650;
  margin: 30px 0 6px;
}

/* ---------- Hero (home) ---------- */
.hero {
  max-width: var(--maxw);
  margin-bottom: 8px;
}
.hero-tag {
  font-family: "Fraunces", serif;
  font-size: clamp(38px, 6vw, 60px);
  line-height: 1.02;
  font-weight: 600;
  letter-spacing: -.015em;
  margin: 0 0 22px;
}
.hero-tag .u {
  background: linear-gradient(transparent 66%, var(--signal-soft) 66%);
  padding: 0 2px;
}
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 10px; }
.pill {
  font-size: 13px;
  color: var(--slate);
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 5px 13px;
}

/* ---------- Timeline / entries ---------- */
.entry {
  max-width: var(--maxw);
  padding: 20px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 24px;
}
.entry:last-child { border-bottom: 1px solid var(--line); }
.entry .when {
  font-size: 13.5px;
  color: var(--slate);
  font-variant-numeric: tabular-nums;
  padding-top: 2px;
}
.entry h3 { margin: 0 0 4px; }
.entry .sub { color: var(--slate); font-size: 15px; margin: 0 0 8px; }
.entry p { margin: 0; font-size: 15.5px; }

/* ---------- Callout card (research highlight) ---------- */
.callout {
  max-width: var(--maxw);
  background: var(--ink);
  color: #EDEBE4;
  border-radius: 14px;
  padding: 30px 32px;
  margin: 8px 0 12px;
}
.callout .k {
  color: var(--signal-soft);
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 8px;
}
.callout h3 { color: #fff; margin: 0 0 10px; font-size: 20px; }
.callout p { color: #C9CEDC; font-size: 15.5px; margin: 0; max-width: none; }

/* ---------- Simple bullet lists ---------- */
ul.clean { max-width: var(--maxw); padding-left: 20px; }
ul.clean li { margin: 8px 0; }

.tag { color: var(--signal); font-weight: 600; }

/* ---------- Mobile ---------- */
.mobile-bar { display: none; }

@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%; height: auto; position: static;
    flex-direction: row; align-items: center; flex-wrap: wrap;
    padding: 20px 22px; gap: 14px;
  }
  .portrait { width: 60px; height: 60px; margin: 0; }
  .side-name { font-size: 19px; }
  .side-role { display: none; }
  .nav {
    flex-direction: row; flex-wrap: wrap; width: 100%; gap: 4px;
    order: 3;
  }
  .nav a { padding: 7px 11px; font-size: 14px; }
  .nav a .n { display: none; }
  .side-foot { display: none; }
  .content { padding: 40px 22px 64px; }
  .entry { grid-template-columns: 1fr; gap: 4px; }
  .entry .when { padding-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}