/* =========================================================================
   Amlaan Bhoi — academic site
   Design system (Phase 1). Refined evolution of the Jon Barron template:
   single column, serif headings for gravitas, sans body, scholarly palette.
   ========================================================================= */

/* ---- Design tokens ---------------------------------------------------- */
:root {
  --ink:        #232f3e;   /* primary text */
  --ink-soft:   #4a5562;   /* secondary text */
  --ink-faint:  #707b88;   /* meta / captions */
  --bg:         #fafafa;   /* page background */
  --surface:    #ffffff;   /* cards / thumbnails */
  --rule:       #e6e8eb;   /* hairline dividers */
  --link:       #0b5fa5;   /* scholarly blue (replaces Amazon orange) */
  --link-hover: #08436f;
  --link-visit: #5a5a7a;
  --accent:     #0f766e;   /* sparing teal accent */

  --serif: "Iowan Old Style", "Iowan Old Style W01", Georgia, "Times New Roman", ui-serif, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 820px;
  --gap:  2.25rem;        /* vertical rhythm between sections */
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:       #e7eaee;
    --ink-soft:  #b6bdc6;
    --ink-faint: #8b939d;
    --bg:        #14181d;
    --surface:   #1c2128;
    --rule:      #2a313a;
    --link:      #6fb3ec;
    --link-hover:#9ccbf4;
    --link-visit:#b3a6d6;
    --accent:    #4fd1c5;
  }
}

/* ---- Reset / base ----------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ---- Links ------------------------------------------------------------ */
a { color: var(--link); text-decoration: none; }
a:hover, a:focus { color: var(--link-hover); text-decoration: underline; }
a:visited { color: var(--link-visit); }

/* Keyboard focus visibility (a11y) */
a:focus-visible, .skip-link:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--ink);
  padding: .5rem .9rem;
  z-index: 10;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* ---- Headings (serif gravitas) --------------------------------------- */
h1, h2, h3, .name { font-family: var(--serif); color: var(--ink); }

.name {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}

h2.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 1rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--rule);
}

h3 { font-size: 1.05rem; font-weight: 700; margin: 0 0 .15rem; }

p { margin: 0 0 1rem; }
.lead { color: var(--ink-soft); }

/* ---- Header / hero ---------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 1fr 168px;
  gap: 1.75rem;
  align-items: center;
}

.hero .tagline {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-soft);
  font-size: 1.05rem;
  margin: .35rem 0 .6rem;
}

.hero .location { color: var(--ink-faint); font-size: .92rem; margin: 0 0 .9rem; }

.headshot {
  width: 168px;
  height: 168px;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
}

/* link row under the name */
.linkrow {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .85rem;
  font-size: .93rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.linkrow li { display: inline-flex; align-items: center; }
.linkrow li + li::before {
  content: "·";
  color: var(--ink-faint);
  margin-right: .85rem;
}

/* ---- Section rhythm --------------------------------------------------- */
section { margin-top: var(--gap); }

/* ---- Two-column media rows (publications / projects) ------------------ */
.entry {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.1rem;
  margin-bottom: 1.6rem;
}
.entry .thumb {
  width: 160px;
  height: 120px;
  object-fit: cover;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
}

/* before/after reveal on hover (publications) */
.thumb-hover {
  position: relative;
  display: block;
  width: 160px;
  height: 120px;
}
.thumb-hover .thumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.thumb-hover .over {
  opacity: 0;
  transition: opacity .2s ease-in-out;
}
.thumb-hover:hover .over,
.thumb-hover:focus-within .over {
  opacity: 1;
}
.entry .title { font-family: var(--serif); font-weight: 700; }
.entry .authors { color: var(--ink-soft); }
.entry .venue { font-style: italic; color: var(--ink-soft); }
.entry .meta { font-size: .9rem; color: var(--ink-faint); }
.entry .cites { font-variant-numeric: tabular-nums; }
.entry .desc { font-size: .94rem; color: var(--ink-soft); margin-top: .35rem; }

/* compact list sections (awards / service / talks / experience) */
.stack { list-style: none; margin: 0; padding: 0; }
.stack > li { margin-bottom: .9rem; }
.stack .when { color: var(--ink-faint); font-size: .9rem; }
.selectivity { color: var(--accent); font-size: .9rem; }

/* ---- Footer ----------------------------------------------------------- */
footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--ink-faint);
  font-size: .85rem;
  text-align: center;
}
footer .quote { font-family: var(--serif); font-style: italic; }

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 640px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero .headshot-wrap { order: -1; }
  .headshot { width: 120px; height: 120px; }
  .entry { grid-template-columns: 1fr; }
  .entry .thumb { width: 100%; height: auto; aspect-ratio: 4 / 3; }
  .thumb-hover { width: 100%; height: auto; aspect-ratio: 4 / 3; }
  .thumb-hover .thumb { position: absolute; aspect-ratio: auto; }
  .name { font-size: 1.8rem; }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}