/* ============================================================
   Syed Nahin Hossain — monochrome portfolio
   Ink on paper. The only colour lives inside the photographs,
   and only when you look closely.
   ============================================================ */

:root {
  --ink: #111111;
  --ink-soft: #3d3d3d;
  --muted: #767676;
  --hairline: #e2e2e0;
  --paper: #fafaf8;
  --paper-raised: #ffffff;
  --accent: var(--ink);
  --dark: #111111;
  --dark-text: #fafaf8;
  --display: 'Marcellus', serif;
  --body: 'Newsreader', Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --measure: 62ch;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--ink); color: var(--paper); }

/* ---------- primitives ---------- */

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 28px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.rule { border: 0; border-top: 1px solid var(--hairline); }

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 14px 26px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background .25s ease, color .25s ease;
  cursor: pointer;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.solid { background: var(--ink); color: var(--paper); }
.btn.solid:hover { background: transparent; color: var(--ink); }
.btn.inverse { border-color: var(--dark-text); color: var(--dark-text); }
.btn.inverse:hover { background: var(--dark-text); color: var(--dark); }
.btn.inverse.solid { background: var(--dark-text); color: var(--dark); }
.btn.inverse.solid:hover { background: transparent; color: var(--dark-text); }

.textlink {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 3px;
  transition: opacity .2s;
}
.textlink:hover { opacity: 0.55; }

/* ---------- reveal on scroll ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.rv.in { opacity: 1; transform: none; }

/* ---------- nav ---------- */

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 28px;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-brand {
  font-family: var(--display);
  font-size: 19px;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
}
.nav-links { display: flex; gap: 26px; list-style: none; }
.nav-links a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color .2s;
  padding: 4px 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }

.nav-toggle {
  display: none;
  background: none; border: 0; cursor: pointer;
  font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink); padding: 8px;
}
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column; gap: 0; padding: 8px 28px 20px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 12px 0; border-bottom: 1px solid var(--hairline); }
  .nav-links li:last-child a { border-bottom: 0; }
  .nav-toggle { display: block; }
}

/* ---------- hero ---------- */

.hero {
  background: var(--dark);
  color: var(--dark-text);
  padding: 150px 0 90px;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 70px;
  align-items: center;
}
.hero .eyebrow { color: color-mix(in srgb, var(--dark-text) 58%, var(--dark)); }
.hero h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(46px, 7.2vw, 92px);
  line-height: 1.03;
  letter-spacing: 0.01em;
  margin: 22px 0 26px;
}
.hero-fields {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--dark-text) 72%, var(--dark));
  margin-bottom: 34px;
}
.hero-role { font-size: 18px; font-style: italic; color: color-mix(in srgb, var(--dark-text) 85%, var(--dark)); max-width: 46ch; }
.hero-role strong { font-style: normal; font-weight: 500; color: var(--dark-text); display: block; margin-bottom: 4px; }
.hero-cta { margin-top: 44px; display: flex; gap: 16px; flex-wrap: wrap; }

.hero-portrait { position: relative; justify-self: end; width: min(360px, 100%); }
.hero-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}
.hero-portrait::after {
  content: '';
  position: absolute; inset: 14px -14px -14px 14px;
  border: 1px solid color-mix(in srgb, var(--dark-text) 22%, var(--dark));
  z-index: -1;
}
.hero-portrait figcaption {
  margin-top: 26px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--dark-text) 52%, var(--dark));
}

@media (max-width: 900px) {
  .hero { padding: 120px 0 70px; }
  .hero-grid { grid-template-columns: 1fr; gap: 50px; }
  .hero-portrait { justify-self: start; }
}

/* ---------- sections: ledger layout ---------- */

.section { padding: 96px 0 30px; }
.section-head { border-top: 1px solid var(--ink); padding-top: 18px; }
.section-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}
.section-label { position: sticky; top: 92px; }
.section-label .num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
  display: block;
  margin-bottom: 10px;
}
.section-label h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0.02em;
}
.section-body { max-width: 760px; padding-bottom: 40px; }

@media (max-width: 900px) {
  .section { padding: 70px 0 20px; }
  .section-grid { grid-template-columns: 1fr; gap: 26px; }
  .section-label { position: static; }
}

/* ---------- news ---------- */

.news-item {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 26px;
  padding: 22px 0;
  border-bottom: 1px solid var(--hairline);
}
.news-item:first-child { padding-top: 4px; }
.news-date { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--muted); padding-top: 5px; }
.news-item h3 { font-family: var(--body); font-weight: 500; font-size: 19px; line-height: 1.4; }
.news-item p { font-size: 16px; color: var(--ink-soft); margin-top: 6px; }
.news-item .textlink { display: inline-block; margin-top: 12px; }

/* ---------- about ---------- */

.about-grid { display: grid; grid-template-columns: 1fr 300px; gap: 56px; align-items: start; }
.about-prose p { max-width: var(--measure); margin-bottom: 20px; }
.about-prose p:first-child::first-letter {
  font-family: var(--display);
  font-size: 3.4em;
  float: left;
  line-height: 0.82;
  padding: 6px 10px 0 0;
}
.bio-card { border: 1px solid var(--hairline); background: var(--paper-raised); padding: 28px; }
.bio-card h3 {
  font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase;
  font-weight: 500; margin-bottom: 18px; color: var(--muted);
}
.bio-row { padding: 12px 0; border-top: 1px solid var(--hairline); font-size: 15px; }
.bio-row .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 4px; }
.bio-row a { text-decoration: none; border-bottom: 1px solid var(--hairline); }
.bio-row a:hover { border-color: var(--ink); }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } }

/* ---------- skills ---------- */

.skills-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.skill-group h3 { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; font-weight: 500; color: var(--muted); margin-bottom: 6px; }
.skill-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 13px 2px; border-bottom: 1px solid var(--hairline);
  font-size: 16.5px;
}
.skill-row .lvl { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
@media (max-width: 700px) { .skills-grid { grid-template-columns: 1fr; } }

/* ---------- experience / education ---------- */

.timeline-item { padding: 26px 0; border-bottom: 1px solid var(--hairline); }
.timeline-item:first-child { padding-top: 4px; }
.timeline-item .period { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; color: var(--muted); }
.timeline-item h3 { font-family: var(--display); font-weight: 400; font-size: 22px; margin: 8px 0 2px; }
.timeline-item .org { font-style: italic; color: var(--ink-soft); font-size: 16.5px; }
.timeline-item .result { font-family: var(--mono); font-size: 12px; margin-top: 8px; color: var(--ink-soft); }
.timeline-item p.desc { font-size: 16px; color: var(--ink-soft); margin-top: 10px; max-width: var(--measure); }

.activities { margin-top: 18px; padding-left: 20px; border-left: 1px solid var(--hairline); }
.activities .eyebrow { display: block; margin-bottom: 4px; }
.activity { padding: 10px 0; }
.activity h4 { font-weight: 500; font-size: 15.5px; }
.activity .period { font-size: 11px; }
.activity p { font-size: 14.5px; color: var(--muted); margin-top: 3px; }

/* ---------- publications ---------- */

.pub {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 26px;
  padding: 30px 0;
  border-bottom: 1px solid var(--hairline);
}
.pub:first-child { padding-top: 4px; }
.pub .year { font-family: var(--mono); font-size: 13px; letter-spacing: .08em; color: var(--muted); padding-top: 6px; }
.pub-meta { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 10px; }
.tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .16em; text-transform: uppercase;
  border: 1px solid var(--hairline); padding: 4px 10px; color: var(--muted);
}
.tag.badge { border-color: var(--ink); color: var(--ink); background: var(--paper-raised); }
.pub h3 { font-family: var(--display); font-weight: 400; font-size: 23px; line-height: 1.3; max-width: 34ch; }
.pub .venue { font-style: italic; color: var(--ink-soft); font-size: 15.5px; margin-top: 6px; }
.pub p.abstract { font-size: 15.5px; color: var(--ink-soft); margin-top: 12px; max-width: var(--measure); }
.pub .textlink { display: inline-block; margin-top: 16px; }
@media (max-width: 640px) { .pub, .news-item { grid-template-columns: 1fr; gap: 8px; } }

/* ---------- courses ---------- */

.courses { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; }
.course-row {
  display: flex; justify-content: space-between; gap: 14px; align-items: baseline;
  padding: 14px 2px; border-bottom: 1px solid var(--hairline); font-size: 16.5px;
}
.course-row .mode { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
@media (max-width: 700px) { .courses { grid-template-columns: 1fr; } }

/* ---------- projects ---------- */

.project {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: center;
}
.project:first-child { padding-top: 4px; }
.project-media { border: 1px solid var(--hairline); background: #000; }
.project-media img, .project-media video {
  width: 100%; aspect-ratio: 16/10; object-fit: cover;
}
.project .tags { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.project h3 { font-family: var(--display); font-weight: 400; font-size: 24px; margin: 10px 0 8px; }
.project p { font-size: 15.5px; color: var(--ink-soft); max-width: 56ch; }
.project .textlink { display: inline-block; margin-top: 16px; }
@media (max-width: 800px) { .project { grid-template-columns: 1fr; gap: 20px; } }

/* ---------- awards ---------- */

.award-row { display: flex; justify-content: space-between; gap: 20px; align-items: baseline; padding: 16px 2px; border-bottom: 1px solid var(--hairline); }
.award-row .t { font-size: 17px; font-weight: 500; }
.award-row .o { font-style: italic; color: var(--muted); font-size: 14.5px; text-align: right; }
@media (max-width: 640px) { .award-row { flex-direction: column; gap: 2px; } .award-row .o { text-align: left; } }

/* ---------- photography: the signature ---------- */

.photo-section { background: var(--dark); color: var(--dark-text); margin-top: 66px; padding: 96px 0; }
.photo-section .section-head { border-top-color: var(--dark-text); }
.photo-section .num { color: color-mix(in srgb, var(--dark-text) 52%, var(--dark)); }
.photo-intro { font-size: 17px; font-style: italic; color: color-mix(in srgb, var(--dark-text) 80%, var(--dark)); max-width: 60ch; margin-bottom: 44px; }
.photo-grid {
  columns: 3;
  column-gap: 14px;
}
.photo-grid figure {
  break-inside: avoid;
  margin: 0 0 14px;
  position: relative;
  cursor: zoom-in;
  overflow: hidden;
}
.photo-grid img {
  width: 100%;
  transition: transform 1.4s ease;
}
.photo-grid figure:hover img { transform: scale(1.025); }
.photo-grid figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 26px 14px 10px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: #eee;
  background: linear-gradient(transparent, rgba(0,0,0,.6));
  opacity: 0; transition: opacity .4s;
}
.photo-grid figure:hover figcaption { opacity: 1; }
@media (max-width: 900px) { .photo-grid { columns: 2; } }
@media (max-width: 560px) { .photo-grid { columns: 1; } }

/* lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(8,8,8,0.96);
  display: none;
  align-items: center; justify-content: center;
  padding: 40px;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 92vh; }

/* ---------- contact ---------- */

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-list { list-style: none; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--hairline); font-size: 16.5px; display: flex; gap: 14px; align-items: baseline; }
.contact-list .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); min-width: 84px; }
.contact-list a { text-decoration: none; border-bottom: 1px solid var(--hairline); }
.contact-list a:hover { border-color: var(--ink); }
.contact-note { font-style: italic; color: var(--ink-soft); max-width: 44ch; margin-bottom: 26px; font-size: 17px; }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--ink); margin-top: 80px; padding: 34px 0 44px; }
.footer-inner { display: flex; justify-content: space-between; align-items: baseline; gap: 20px; flex-wrap: wrap; }
.footer .brand { font-family: var(--display); font-size: 20px; }
.footer .fine { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.footer .fine a { color: inherit; text-decoration: none; }
.footer .fine a:hover { color: var(--ink); }

.social { display: flex; gap: 18px; }
.social a { color: var(--muted); transition: color .2s; }
.social a:hover { color: var(--ink); }
.social svg { width: 18px; height: 18px; display: block; }

/* ---------- custom sections ---------- */
.section-intro { font-style: italic; color: var(--ink-soft); max-width: 60ch; margin-bottom: 10px; font-size: 17px; }
.entry-img { margin-top: 14px; max-width: 420px; width: 100%; border: 1px solid var(--hairline); }

/* ---------- section layout variants ---------- */
.section.layout-stacked .section-grid { grid-template-columns: 1fr; gap: 26px; }
.section.layout-stacked .section-label { position: static; }
.section.layout-stacked .section-body { max-width: 100%; }
.section.layout-centered .section-grid { grid-template-columns: 1fr; gap: 30px; }
.section.layout-centered .section-label { position: static; text-align: center; }
.section.layout-centered .section-body { max-width: 720px; margin: 0 auto; }

/* ---------- card style for custom section entries ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card { border: 1px solid var(--hairline); background: var(--paper-raised); padding: 24px; }
.card h3 { font-family: var(--display); font-weight: 400; font-size: 20px; margin-bottom: 6px; }
.card p { font-size: 15px; color: var(--ink-soft); }
.entry-meta { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--muted); display: block; margin-bottom: 8px; }

/* ---------- inline formatted links in body text ---------- */
.section-body p a, .photo-intro a { color: var(--accent); text-decoration: none; border-bottom: 1px solid var(--accent); transition: opacity .2s; }
.section-body p a:hover, .photo-intro a:hover { opacity: .55; }
.photo-intro a { color: var(--dark-text); border-bottom-color: var(--dark-text); }

/* ---------- text alignment (default justified; admin can override) ---------- */
:root { --align: justify; }
.section-body p, .photo-intro { text-align: var(--align); }
.section.layout-centered { --align: center; }