/* ───────────────────────────────────────────────────────────────
   Md Nayem Uddin — personal site
   Light · minimal · sage accent · Fraunces + Inter
   Tip: change the palette by editing the variables below.
   ─────────────────────────────────────────────────────────────── */

:root {
  --bg:        #FBFAF7;   /* warm off-white */
  --surface:   #FFFFFF;
  --ink:       #20201E;   /* near-black, slightly warm */
  --muted:     #76746E;
  --line:      #E8E5DE;
  --accent:    #5E7F6E;   /* muted sage green */
  --accent-dk: #44614F;
  --max:       720px;
  --max-wide:  1000px;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { 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: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.container--wide { max-width: var(--max-wide); }

/* ── Links ── */
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dk); text-decoration: underline; text-underline-offset: 2px; }

/* ── Headings ── */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; line-height: 1.2; color: var(--ink); }
h1 { font-size: 2.4rem; letter-spacing: -0.5px; margin: 0; }
h2 {
  font-size: 1.35rem; margin: 2.6rem 0 1rem; font-weight: 600;
  display: flex; align-items: center; gap: 10px;
}
h2::before { /* tiny sage tick before section headings */
  content: ""; width: 16px; height: 2px; background: var(--accent);
  display: inline-block; border-radius: 2px;
}
h3 { font-size: 1.12rem; margin: 1.6rem 0 .4rem; }
p { margin: 0 0 1rem; }
strong { font-weight: 600; }
em { font-style: italic; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }

/* ── Top navigation ── */
.site-nav {
  border-bottom: 1px solid var(--line);
  background: rgba(251,250,247,.85);
  backdrop-filter: saturate(180%) blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.site-nav .container {
  display: flex; align-items: center; justify-content: center;
  gap: 14px; height: 58px;
}
.nav-links { display: flex; gap: 26px; flex-wrap: wrap; justify-content: center; }
.nav-links a {
  color: var(--muted); font-size: .92rem; font-weight: 500; letter-spacing: .2px;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); text-decoration: none; }
.nav-links a.active { box-shadow: inset 0 -2px 0 var(--accent); }

/* ── Hero / intro ── */
.hero { padding: 56px 0 8px; }
.hero .name { display: flex; align-items: center; gap: 14px; }
.hero .tagline { color: var(--muted); font-size: 1.08rem; margin: .5rem 0 1.2rem; }
.hero-links { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .95rem; margin-bottom: 8px; }
.hero-links a { color: var(--accent); }
.lead { font-size: 1.16rem; }

.portrait {
  float: right; width: 132px; height: 132px; border-radius: 14px; object-fit: cover;
  margin: 4px 0 16px 24px; border: 1px solid var(--line);
}

/* ── Main spacing ── */
main { padding-bottom: 80px; }
section { margin-top: 8px; }

/* ── News ── */
.newsfeed { list-style: none; margin: 0; padding: 0; }
.newsfeed li { display: flex; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: .96rem; }
.newsfeed li:last-child { border-bottom: 0; }
.newsfeed .date { color: var(--muted); flex: 0 0 84px; font-size: .85rem; padding-top: 1px; font-variant-numeric: tabular-nums; }
.news-year { margin: 32px 0 4px; font-size: 1.15rem; color: var(--ink); }
.news-year:first-of-type { margin-top: 12px; }
@media (max-width: 540px) {
  .newsfeed li { flex-direction: column; gap: 2px; }
  .newsfeed .date { flex-basis: auto; }
}

/* ── Publications ── */
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub { padding: 14px 0; border-bottom: 1px solid var(--line); }
.pub:last-child { border-bottom: 0; }
.pub .pub-title { font-weight: 600; }
.pub .pub-authors { color: var(--muted); font-size: .92rem; margin-top: 2px; }
.pub .pub-venue { font-size: .9rem; margin-top: 2px; }
.pub .pub-venue em { color: var(--ink); }
.pub .pub-links { margin-top: 6px; display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: .72rem; font-weight: 600; letter-spacing: .3px; text-transform: uppercase;
  color: var(--accent-dk); background: #EDF1EC; border: 1px solid #DCE4DA;
  padding: 1px 7px; border-radius: 999px;
}
.btn-link {
  font-size: .8rem; font-weight: 500; color: var(--accent);
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 9px;
}
.btn-link:hover { text-decoration: none; background: #EDF1EC; color: var(--accent-dk); }
.note-review { font-size: .78rem; font-weight: 600; color: #b06a2c; }

/* ── Experience ── */
.exp-list { list-style: none; margin: 0; padding: 0; }
.exp { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.exp:last-child { border-bottom: 0; }
.exp .logo {
  flex: 0 0 50px; width: 50px; height: 50px; border-radius: 11px;
  border: 1px solid var(--line); background: #fff; object-fit: contain; padding: 7px;
}
.exp .logo-fallback {
  display: flex; align-items: center; justify-content: center; padding: 0;
  font-family: var(--serif); font-size: 1.3rem; color: var(--accent-dk); background: #EDF1EC;
}
.exp .meta { min-width: 0; }
.exp .role { font-weight: 600; }
.exp .role .co a { color: var(--ink); }
.exp .role .co a:hover { color: var(--accent); }
.exp .sub { color: var(--muted); font-size: .84rem; margin: 2px 0 7px; font-variant-numeric: tabular-nums; }
.exp .meta ul { margin: 0; padding-left: 18px; }
.exp .meta li { font-size: .93rem; margin-bottom: 3px; }
@media (max-width: 540px) {
  .exp .logo { flex-basis: 42px; width: 42px; height: 42px; }
}

/* ── Photography gallery ── */
.filterbar { display: flex; gap: 8px; margin: 4px 0 18px; }
.filterbar button {
  font-family: var(--sans); font-size: .85rem; font-weight: 500; cursor: pointer;
  color: var(--muted); background: none; border: 1px solid var(--line);
  border-radius: 999px; padding: 4px 14px;
}
.filterbar button.active, .filterbar button:hover { color: var(--ink); border-color: var(--accent); }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gallery figure { margin: 0; }
.shot {
  display: block; width: 100%; aspect-ratio: 1/1; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--line); cursor: zoom-in; background: var(--surface);
}
.shot img { width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .4s ease; }
.shot:hover img { transform: scale(1.04); }
.shot.placeholder {
  display: flex; align-items: flex-end; padding: 12px;
  background: linear-gradient(135deg, #EEF2EC, #E4EBE3);
  color: var(--accent-dk); font-size: .8rem; font-weight: 600; cursor: default;
}
figcaption { font-size: .8rem; color: var(--muted); margin-top: 6px; }
@media (max-width: 620px) { .gallery { grid-template-columns: repeat(2, 1fr); } }

/* ── Lightbox ── */
.lightbox {
  position: fixed; inset: 0; background: rgba(20,20,18,.9); display: none;
  align-items: center; justify-content: center; z-index: 100; padding: 30px; cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: 6px; }

/* ── Writing (blog index) ── */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-item { padding: 16px 0; border-bottom: 1px solid var(--line); }
.post-item:last-child { border-bottom: 0; }
.post-item .date { color: var(--muted); font-size: .82rem; font-variant-numeric: tabular-nums; }
.post-item .ptitle { font-family: var(--serif); font-size: 1.2rem; font-weight: 600; margin: 2px 0; display: block; }
.post-item .excerpt { color: var(--muted); font-size: .95rem; margin: 0; }

/* ── Single post ── */
.post-header { margin: 48px 0 8px; }
.post-header .date { color: var(--muted); font-size: .85rem; }
.post-header h1 { font-size: 2rem; margin-top: 6px; }
.post-content { font-size: 1.05rem; }
.post-content h2 { font-size: 1.3rem; }
.post-content img { max-width: 100%; border-radius: 10px; }
.post-content blockquote {
  border-left: 3px solid var(--accent); margin: 1.2rem 0; padding: .2rem 0 .2rem 16px;
  color: var(--muted); font-style: italic;
}
.back-link { display: inline-block; margin: 36px 0 0; font-size: .9rem; }

/* teaser blocks on home */
.teasers { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 620px) { .teasers { grid-template-columns: 1fr; } }
.teaser-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-top: 4px; }
.more { font-size: .9rem; font-weight: 500; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem;
  padding: 34px 0; margin-top: 48px; text-align: center;
}
.site-footer .stardust {
  font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 10px;
}
.site-footer .foot-row { margin: 0; font-size: .8rem; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--ink); }

@media (max-width: 540px) {
  body { font-size: 16px; }
  h1 { font-size: 2rem; }
  .portrait { width: 104px; height: 104px; }
  .nav-links { gap: 14px; }
}