/* ============================================================
   M Shahriar Sonet — Academic Portfolio
   Formal, accessible, readable.
   ============================================================ */

:root {
  /* Palette: deep navy + warm ochre, neutral parchment */
  --c-ink:        #0f2745;   /* primary deep navy */
  --c-ink-soft:   #1f3a63;
  --c-accent:     #b8862a;   /* warm ochre / academic gold */
  --c-accent-soft:#e8c879;
  --c-paper:      #fbfaf6;   /* parchment background */
  --c-paper-alt:  #f3eee2;
  --c-line:       #d8d3c4;
  --c-text:       #1c1c1c;
  --c-text-soft:  #4a4a4a;
  --c-muted:      #6b6b6b;

  --font-serif: "Cormorant Garamond", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --maxw: 1140px;
  --gap: clamp(1rem, 2vw, 2rem);

  --radius: 6px;
  --shadow-sm: 0 1px 2px rgba(15, 39, 69, 0.06);
  --shadow-md: 0 6px 24px rgba(15, 39, 69, 0.08);

  --t-fast: 160ms ease;
}

/* ----------------------------- Reset ----------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--c-ink); text-decoration: underline; text-underline-offset: 3px; transition: color var(--t-fast); }
a:hover, a:focus-visible { color: var(--c-accent); }

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

ul, ol { padding-left: 1.2rem; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--c-ink);
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0 0 0.5em;
  font-weight: 600;
}

p { margin: 0 0 1em; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.25rem);
}

/* ---------- Icon utilities (SVG sprite + img) ---------- */
.ic {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
  fill: currentColor;
  color: inherit;
}
.ic-sm { width: 16px; height: 16px; }
.ic-img {
  display: inline-block;
  width: 20px;
  height: 20px;
  object-fit: contain;
}

/* Visually hidden (a11y) */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--c-ink);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
  outline: 3px solid var(--c-accent-soft);
}

/* ----------------------------- Header ----------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 246, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--c-ink);
}
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--c-ink);
  color: var(--c-accent-soft);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: 6px;
  letter-spacing: 0.04em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-family: var(--font-serif); font-weight: 600; font-size: 1.12rem; }
.brand-role { font-size: 0.78rem; color: var(--c-muted); letter-spacing: 0.04em; text-transform: uppercase; }

/* Nav */
.primary-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.4rem;
}
.primary-nav a {
  text-decoration: none;
  color: var(--c-ink-soft);
  font-weight: 500;
  font-size: 0.94rem;
  padding: 0.4rem 0;
  position: relative;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-fast);
}
.primary-nav a:hover::after,
.primary-nav a:focus-visible::after,
.primary-nav a.is-active::after {
  transform: scaleX(1);
}
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--c-ink); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  width: 42px; height: 42px;
  padding: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  display: block;
  position: absolute;
  left: 9px; right: 9px;
  height: 2px;
  background: var(--c-ink);
  transition: transform var(--t-fast), opacity var(--t-fast), top var(--t-fast);
}
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .primary-nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--c-paper);
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 240ms ease;
  }
  .primary-nav.is-open { max-height: 480px; }
  .primary-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }
  .primary-nav li { border-top: 1px solid var(--c-line); }
  .primary-nav li:first-child { border-top: 0; }
  .primary-nav a {
    display: block;
    padding: 0.85rem clamp(1rem, 4vw, 2.25rem);
    font-size: 1rem;
  }
  .primary-nav a::after { display: none; }
}

/* ----------------------------- Hero ----------------------------- */
.hero {
  position: relative;
  padding: clamp(4rem, 10vw, 7.5rem) 0 clamp(3rem, 6vw, 5rem);
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(184, 134, 42, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(15, 39, 69, 0.08), transparent 60%),
    var(--c-paper);
  overflow: hidden;
}
.hero::before {
  /* subtle grid for a "geo" feel */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 39, 69, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 39, 69, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 80%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items: center;
  max-width: var(--maxw);
}
.hero-text { max-width: 60ch; }

.hero-portrait {
  margin: 0;
  position: relative;
  justify-self: center;
  width: min(380px, 88vw);
  aspect-ratio: 1 / 1;
}
.hero-portrait::before {
  content: "";
  position: absolute;
  inset: 12px -12px -12px 12px;
  border: 1.5px solid var(--c-accent);
  border-radius: 8px;
  z-index: 0;
  transition: transform var(--t-fast);
}
.hero-portrait img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-md);
  filter: saturate(0.95) contrast(1.02);
}
.hero-portrait:hover::before { transform: translate(2px, 2px); }

@media (max-width: 880px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero-portrait {
    grid-row: 1;
    width: min(220px, 60vw);
    margin-bottom: 0.5rem;
  }
}

.eyebrow,
.section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.6rem);
  font-weight: 700;
  margin: 0 0 0.4em;
}
.hero-tagline {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.1vw, 1.65rem);
  font-weight: 500;
  color: var(--c-ink-soft);
  max-width: 50ch;
  line-height: 1.5;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin: 1.6rem 0 1.8rem;
  color: var(--c-text-soft);
  font-size: 0.95rem;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.meta-item .meta-ic { color: var(--c-accent); }
.meta-item a { color: inherit; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform var(--t-fast), background var(--t-fast), color var(--t-fast), border-color var(--t-fast), box-shadow var(--t-fast);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn .ic { color: currentColor; }
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--c-ink);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--c-ink-soft);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-ink);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  background: var(--c-ink);
  color: #fff;
}

.hero-links {
  list-style: none;
  padding: 0;
  margin: 1.6rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  font-size: 0.88rem;
}
.hero-links a {
  --brand: var(--c-ink);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  color: var(--c-ink);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-weight: 500;
  line-height: 1;
  transition: transform var(--t-fast), border-color var(--t-fast), background var(--t-fast), color var(--t-fast), box-shadow var(--t-fast);
}
.hero-links a .ic {
  width: 16px;
  height: 16px;
  color: var(--brand);
  transition: color var(--t-fast);
}
.hero-links a span { color: var(--c-ink); }

/* Brand-tinted icon at rest */
.hero-links a[data-brand="linkedin"]     { --brand: #0a66c2; }
.hero-links a[data-brand="scholar"]      { --brand: #4285f4; }
.hero-links a[data-brand="researchgate"] { --brand: #00a499; }
.hero-links a[data-brand="orcid"]        { --brand: #a6ce39; }
.hero-links a[data-brand="utd"]          { --brand: #c75b12; }

.hero-links a:hover,
.hero-links a:focus-visible {
  transform: translateY(-1px);
  background: var(--brand);
  border-color: var(--brand);
  box-shadow: var(--shadow-sm);
}
.hero-links a:hover .ic,
.hero-links a:focus-visible .ic,
.hero-links a:hover span,
.hero-links a:focus-visible span { color: #fff; }
/* IMG icons (UTD) — invert to white on dark hover via filter */
.hero-links a:hover .ic-img,
.hero-links a:focus-visible .ic-img { filter: brightness(0) invert(1); }

/* ----------------------------- Sections ----------------------------- */
.section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
  border-top: 1px solid var(--c-line);
}
.section-alt {
  background: var(--c-paper-alt);
}

.section-title {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 600;
  margin: 0 0 1.2rem;
  max-width: 22ch;
}

.subsection-title {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  font-weight: 600;
  margin: 1.6rem 0 0.6rem;
}

.prose p {
  font-size: 1.05rem;
  color: var(--c-text-soft);
  max-width: 60ch;
}
.prose strong { color: var(--c-ink); }
.prose em { color: var(--c-ink-soft); font-style: italic; }

.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
@media (max-width: 820px) {
  .grid-2 { grid-template-columns: 1fr; gap: 1.5rem; }
}

/* ---------- Topic grid (Research) ---------- */
.topic-grid {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.1rem;
}
.topic-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.5rem;
  position: relative;
  transition: transform var(--t-fast), box-shadow var(--t-fast), border-color var(--t-fast);
}
.topic-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-accent);
  border-radius: var(--radius) 0 0 var(--radius);
  opacity: 0.85;
}
.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cfc7ad;
}
.topic-card h3 {
  font-size: 1.25rem;
  margin: 0 0 0.4rem;
  color: var(--c-ink);
}
.topic-card p {
  margin: 0;
  color: var(--c-text-soft);
  font-size: 0.96rem;
}

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  position: relative;
  border-left: 2px solid var(--c-line);
}
.timeline-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1.6rem;
  padding: 0.9rem 0 1.4rem 1.4rem;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 1.3rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-paper);
}
.section-alt .timeline-item::before { box-shadow: 0 0 0 4px var(--c-paper-alt); }

.timeline-when {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-muted);
  padding-top: 0.25rem;
}
.timeline-what h3 {
  font-size: 1.18rem;
  margin: 0 0 0.2rem;
}
.timeline-what p {
  margin: 0;
  color: var(--c-text-soft);
}

@media (max-width: 700px) {
  .timeline-item { grid-template-columns: 1fr; gap: 0.25rem; }
  .timeline-when { padding-top: 0; }
}

/* ---------- Publications ---------- */
.pub-list {
  list-style: decimal;
  padding-left: 1.4rem;
  margin: 1.4rem 0 1rem;
}
.pub-item {
  margin: 0 0 1.1rem;
  padding-left: 0.4rem;
}
.pub-item::marker { color: var(--c-accent); font-weight: 700; }
.pub-cite {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  line-height: 1.6;
}
.pub-cite strong { color: var(--c-ink); }
.pub-cite em { color: var(--c-ink-soft); }
.pub-doi {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84rem;
  color: var(--c-accent);
  text-decoration: none;
  word-break: break-all;
}
.pub-doi:hover { text-decoration: underline; }
.pub-status {
  display: inline-block;
  margin-left: 0.4rem;
  padding: 0.05rem 0.5rem;
  background: rgba(184, 134, 42, 0.12);
  color: var(--c-accent);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---------- Teaching ---------- */
.teaching-blocks {
  display: grid;
  gap: 1.1rem;
}
.teaching-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
}
.teaching-card h3 {
  font-size: 1.22rem;
  margin: 0 0 0.6rem;
}
.teaching-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.teaching-card li {
  padding: 0.4rem 0;
  border-top: 1px dashed var(--c-line);
  color: var(--c-text-soft);
}
.teaching-card li:first-child { border-top: 0; padding-top: 0; }

/* ---------- Awards ---------- */
.awards-list {
  list-style: none;
  padding: 0;
  margin: 1.4rem 0 0;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}
.awards-list li {
  position: relative;
  padding: 0.85rem 1rem 0.85rem 2.4rem;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-text-soft);
}
.awards-list li::before {
  content: "★";
  position: absolute;
  left: 0.95rem;
  top: 0.78rem;
  color: var(--c-accent);
  font-size: 1.05rem;
}

/* ---------- Plain list / chips ---------- */
.plain-list {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0 0.8rem;
  display: grid;
  gap: 0.45rem;
}
.plain-list li {
  padding-left: 1rem;
  position: relative;
  color: var(--c-text-soft);
}
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  transform: rotate(45deg);
}

.skills-group { margin-top: 0.8rem; }
.chips {
  list-style: none;
  padding: 0;
  margin: 0.3rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chips li {
  font-size: 0.86rem;
  font-weight: 500;
  background: #fff;
  color: var(--c-ink);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: 0.32rem 0.85rem;
}

/* ---------- Contact ---------- */
.contact-inner { max-width: 920px; }

.contact-grid {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}
.contact-grid > li { display: block; }

.contact-card {
  --brand: var(--c-ink);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--c-ink);
  transition:
    transform var(--t-fast),
    border-color var(--t-fast),
    box-shadow var(--t-fast),
    background var(--t-fast);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--brand);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t-fast);
}

/* Icon block */
.contact-card-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(15, 39, 69, 0.06);
  color: var(--c-ink);
  flex-shrink: 0;
  transition: background var(--t-fast), color var(--t-fast);
}
.contact-card-icon .ic { width: 22px; height: 22px; }
.contact-card-icon .ic-img { width: 22px; height: 22px; }
/* UTD icon block — keep their orange visible at rest */
.contact-card-icon--brand {
  background: rgba(199, 91, 18, 0.10);
}

/* Body (label + value) */
.contact-card-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.contact-card-label {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 0.15rem;
}
.contact-card-value {
  font-size: 0.98rem;
  color: var(--c-ink);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Arrow */
.contact-card-arrow {
  display: inline-grid;
  place-items: center;
  color: var(--c-muted);
  transition: transform var(--t-fast), color var(--t-fast);
  flex-shrink: 0;
}
.contact-card-arrow .ic { width: 16px; height: 16px; }

/* Hover/focus state — brand-tinted but tasteful */
.contact-card:not(.contact-card--static):hover,
.contact-card:not(.contact-card--static):focus-visible {
  transform: translateY(-2px);
  border-color: var(--brand);
  box-shadow: 0 8px 24px rgba(15, 39, 69, 0.10);
  background: #fff;
}
.contact-card:not(.contact-card--static):hover::before,
.contact-card:not(.contact-card--static):focus-visible::before {
  transform: scaleY(1);
}
.contact-card:not(.contact-card--static):hover .contact-card-icon,
.contact-card:not(.contact-card--static):focus-visible .contact-card-icon {
  background: var(--brand);
  color: #fff;
}
.contact-card:not(.contact-card--static):hover .contact-card-arrow,
.contact-card:not(.contact-card--static):focus-visible .contact-card-arrow {
  color: var(--brand);
  transform: translateX(4px);
}

/* Static (office) card — informational only */
.contact-card--static {
  cursor: default;
  background: var(--c-paper-alt);
  border-style: dashed;
}
.contact-card--static .contact-card-icon {
  background: rgba(184, 134, 42, 0.12);
  color: var(--c-accent);
}

/* Brand accent colors (subtle — applied only on hover via --brand var) */
.contact-card[data-brand="email"]        { --brand: #0f2745; }
.contact-card[data-brand="linkedin"]     { --brand: #0a66c2; }
.contact-card[data-brand="utd"]          { --brand: #c75b12; } /* UTD orange */
.contact-card[data-brand="scholar"]      { --brand: #4285f4; }
.contact-card[data-brand="researchgate"] { --brand: #00ccbb; }
.contact-card[data-brand="orcid"]        { --brand: #a6ce39; }

/* Brand icons get a touch of brand color even at rest */
.contact-card[data-brand="linkedin"]     .contact-card-icon { color: #0a66c2; background: rgba(10, 102, 194, 0.08); }
.contact-card[data-brand="scholar"]      .contact-card-icon { color: #4285f4; background: rgba(66, 133, 244, 0.08); }
.contact-card[data-brand="researchgate"] .contact-card-icon { color: #00a499; background: rgba(0, 164, 153, 0.08); }
.contact-card[data-brand="orcid"]        .contact-card-icon { color: #a6ce39; background: rgba(166, 206, 57, 0.10); }
/* When the icon block flips to brand bg on hover, invert the UTD <img> to stay visible */
.contact-card:hover .contact-card-icon--brand .ic-img,
.contact-card:focus-visible .contact-card-icon--brand .ic-img { filter: brightness(0) invert(1); }

@media (max-width: 480px) {
  .contact-card { padding: 0.85rem 1rem; gap: 0.85rem; }
  .contact-card-icon { width: 40px; height: 40px; }
  .contact-card-icon svg { width: 20px; height: 20px; }
}

/* ----------------------------- Footer ----------------------------- */
.site-footer {
  background: var(--c-ink);
  color: #cfd6e2;
  padding: 2rem 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.9rem;
}
.site-footer p { margin: 0; }
.footer-meta { color: #95a4ba; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print styles for CV-like printing */
@media print {
  .site-header, .nav-toggle, .hero-actions, .hero-links, .site-footer { display: none !important; }
  body { background: #fff; color: #000; font-size: 12pt; }
  .section, .hero { padding: 1rem 0; border: 0; background: #fff !important; }
  a { color: #000; text-decoration: none; }
  .pub-doi::after { content: " (" attr(href) ")"; font-size: 0.85em; }
}