/* ============================================================
   SHAYAN JALALI — PORTFOLIO
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────────── */
:root {
  /* Dark palette (default) */
  --bg:          #020C1B;
  --bg2:         #041428;
  --surface:     rgba(255,255,255,0.04);
  --surface2:    rgba(255,255,255,0.08);
  --border:      rgba(255,255,255,0.08);
  --border-glow: rgba(0,212,255,0.35);
  --accent:      #00D4FF;
  --accent2:     #4A9EFF;
  --glow:        rgba(0,212,255,0.10);
  --glow-strong: rgba(0,212,255,0.22);
  --text:        #E6F1FF;
  --muted:       rgba(200,220,255,0.50);
  --tag-bg:      rgba(0,212,255,0.10);
  --tag-text:    #00D4FF;

  /* Typography */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Layout */
  --container: 1100px;
  --radius:    14px;
  --radius-sm: 7px;
  --t:         0.22s ease;
}

/* Light theme overrides */
[data-theme="light"] {
  --bg:          #F0F4F8;
  --bg2:         #E2E8F0;
  --surface:     rgba(0,0,0,0.03);
  --surface2:    rgba(0,0,0,0.06);
  --border:      rgba(0,0,0,0.10);
  --border-glow: rgba(0,100,200,0.35);
  --accent:      #0070C0;
  --accent2:     #1A56DB;
  --glow:        rgba(0,100,200,0.08);
  --glow-strong: rgba(0,100,200,0.16);
  --text:        #1A2332;
  --muted:       rgba(30,50,80,0.55);
  --tag-bg:      rgba(0,100,200,0.08);
  --tag-text:    #0070C0;
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  font-family: var(--font-sans);
  background:  var(--bg);
  color:       var(--text);
  font-size:   15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  transition: background var(--t), color var(--t);
}
a    { color: var(--accent); text-decoration: none; transition: opacity var(--t), color var(--t); }
a:hover { opacity: .75; }
img  { display: block; max-width: 100%; }
ul, ol { list-style: none; }

/* ── Container ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================================
   HEADER & NAV
============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  background: rgba(2,12,27,0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  border-bottom: 1px solid transparent;
  transition:
    background   0.4s ease,
    backdrop-filter 0.4s ease,
    border-color 0.4s ease;
}
.site-header.scrolled {
  background: rgba(2,12,27,0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
}
[data-theme="light"] .site-header.scrolled {
  background: rgba(240,244,248,0.88);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 64px;
}

.brand {
  font-family: var(--font-display);
  font-size:   1rem;
  font-weight: 700;
  color:       var(--text);
  flex-shrink: 0;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color var(--t);
}
.brand:hover { color: var(--accent); opacity: 1; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}
.nav-links a {
  font-size:      .74rem;
  font-weight:    500;
  color:          var(--muted);
  padding:        5px 10px;
  border-radius:  var(--radius-sm);
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color var(--t), background var(--t);
}
.nav-links a:hover        { color: var(--text);   background: var(--surface2); opacity: 1; }
.nav-links a.active       { color: var(--accent);  background: var(--glow);    opacity: 1; }

.nav-actions {
  display:     flex;
  align-items: center;
  gap:         8px;
  flex-shrink: 0;
}

/* Hamburger */
.menu-btn {
  display:        none;
  flex-direction: column;
  gap:            4px;
  background:     none;
  border:         1px solid var(--border);
  cursor:         pointer;
  border-radius:  var(--radius-sm);
  padding:        8px;
}
.menu-btn span {
  display:       block;
  width:         18px;
  height:        2px;
  background:    var(--text);
  border-radius: 2px;
  transition:    transform .2s, opacity .2s;
}
.menu-btn.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display:        inline-flex;
  align-items:    center;
  gap:            6px;
  font-size:      .8rem;
  font-weight:    600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding:        10px 20px;
  border-radius:  var(--radius-sm);
  border:         1px solid transparent;
  cursor:         pointer;
  transition:     all var(--t);
  white-space:    nowrap;
  font-family:    var(--font-sans);
}

.btn-primary {
  background:   var(--accent);
  color:        #020C1B;
  border-color: var(--accent);
}
.btn-primary:hover {
  background:   #33DFFF;
  border-color: #33DFFF;
  color:        #020C1B;
  opacity:      1;
  box-shadow:   0 0 22px rgba(0,212,255,0.38);
}

.btn-outline {
  background:   transparent;
  color:        var(--accent);
  border-color: rgba(0,212,255,0.45);
}
.btn-outline:hover {
  background:   var(--glow);
  border-color: var(--accent);
  opacity:      1;
}

.btn-ghost {
  background:   transparent;
  color:        var(--muted);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface2); color: var(--text); border-color: rgba(255,255,255,0.2); opacity: 1; }

.btn-sm  { font-size: .7rem; padding: 6px 13px; }

.theme-btn { font-size: .78rem; }

/* ============================================================
   HERO
============================================================ */
.hero {
  position:   relative;
  min-height: 100vh;
  display:    flex;
  align-items: center;
  overflow:   hidden;
}

/* Gradient overlay */
.hero::after {
  content:  '';
  position: absolute;
  inset:    0;
  background:
    radial-gradient(ellipse 60% 80% at 18% 50%, rgba(0,50,120,0.18) 0%, transparent 70%),
    linear-gradient(to bottom, transparent 60%, var(--bg) 100%);
  z-index:  1;
  pointer-events: none;
}

#hero-canvas {
  position: absolute;
  inset:    0;
  width:    100%;
  height:   100%;
  z-index:  0;
}

.hero-inner {
  position: relative;
  z-index:  2;
  display:  grid;
  grid-template-columns: 1fr 310px;
  gap:         52px;
  align-items: start;
  padding-top:    140px;
  padding-bottom: 80px;
}

/* ── Entry animations ────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-left > * {
  animation: fadeUp 0.9s cubic-bezier(0.16,1,0.3,1) both;
}
.hero-left .avatar         { animation-delay: 0.12s; }
.hero-left .hero-eyebrow   { animation-delay: 0.22s; }
.hero-left .hero-title     { animation-delay: 0.35s; }
.hero-left .hero-lead      { animation-delay: 0.48s; }
.hero-left .hero-cta       { animation-delay: 0.60s; }
.hero-left .hero-links     { animation-delay: 0.70s; }

/* Avatar */
.avatar {
  width:         72px;
  height:        72px;
  border-radius: 50%;
  object-fit:    cover;
  margin-bottom: 24px;
  border:        2px solid rgba(0,212,255,0.38);
  box-shadow:    0 0 22px rgba(0,212,255,0.22);
}

/* Eyebrow label above title */
.hero-eyebrow {
  font-family:    var(--font-mono);
  font-size:      .68rem;
  font-weight:    500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color:          var(--accent);
  margin-bottom:  14px;
  display:        flex;
  align-items:    center;
  gap:            10px;
}
.hero-eyebrow::before {
  content:  '';
  display:  inline-block;
  width:    28px;
  height:   1px;
  background: var(--accent);
  flex-shrink: 0;
}

/* Main headline */
.hero-title {
  font-family:   var(--font-display);
  font-size:     clamp(2rem, 4.2vw, 3rem);
  font-weight:   700;
  color:         var(--text);
  margin-bottom: 18px;
  letter-spacing: -.02em;
  line-height:   1.15;
}
.hero-title em { font-style: normal; color: var(--accent); }

/* Lead paragraph */
.hero-lead {
  font-size:     .97rem;
  color:         var(--muted);
  line-height:   1.85;
  margin-bottom: 30px;
  max-width:     460px;
}

/* CTA row */
.hero-cta   { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.hero-links { display: flex; gap:  7px; flex-wrap: wrap; }

/* Small pill links (GitHub, ORCID, etc.) */
.icon-link {
  font-family:    var(--font-mono);
  font-size:      .68rem;
  font-weight:    500;
  letter-spacing: .10em;
  color:          var(--muted);
  padding:        5px 13px;
  border:         1px solid var(--border);
  border-radius:  20px;
  transition:     all var(--t);
  text-transform: uppercase;
}
.icon-link:hover {
  color:        var(--accent);
  border-color: var(--border-glow);
  background:   var(--glow);
  opacity:      1;
}

/* Glass profile card */
.hero-card {
  background:       rgba(4,20,55,0.55);
  backdrop-filter:  blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border:           1px solid rgba(0,212,255,0.15);
  border-radius:    var(--radius);
  padding:          28px 26px;
  box-shadow:       0 8px 32px rgba(0,0,0,0.4),
                    inset 0 1px 0 rgba(255,255,255,0.06);
  animation:        fadeUp 0.9s cubic-bezier(0.16,1,0.3,1) 0.5s both;
  position:         sticky;
  top:              84px;
}

.hero-card-name {
  font-family:    var(--font-display);
  font-size:      1.05rem;
  font-weight:    700;
  margin-bottom:  18px;
  color:          var(--text);
  letter-spacing: .02em;
}

.info-list { display: flex; flex-direction: column; gap: 11px; margin-bottom: 20px; }
.info-list li {
  font-size:   .82rem;
  color:       var(--muted);
  display:     flex;
  align-items: flex-start;
  gap:         9px;
  line-height: 1.5;
}
.info-icon { flex-shrink: 0; font-size: .88rem; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 5px; }
.tag {
  font-family:    var(--font-mono);
  font-size:      .62rem;
  font-weight:    500;
  letter-spacing: .08em;
  padding:        3px 9px;
  background:     var(--tag-bg);
  color:          var(--tag-text);
  border:         1px solid rgba(0,212,255,0.18);
  border-radius:  4px;
  transition:     border-color var(--t), background var(--t);
}
.tag:hover { background: rgba(0,212,255,0.18); border-color: var(--border-glow); }

/* Scroll cue */
.scroll-hint {
  position:  absolute;
  bottom:    32px;
  left:      50%;
  transform: translateX(-50%);
  display:   flex;
  flex-direction: column;
  align-items:    center;
  gap:       10px;
  z-index:   3;
}
.scroll-text {
  font-family:    var(--font-mono);
  font-size:      .58rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color:          var(--muted);
}
.scroll-bar {
  width:            1px;
  height:           44px;
  background:       linear-gradient(to bottom, var(--accent), transparent);
  transform-origin: top;
  animation:        scrollDrop 2s ease-in-out infinite;
}
@keyframes scrollDrop {
  0%   { transform: scaleY(0); opacity: .8; }
  50%  { transform: scaleY(1); opacity: 1;  }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ============================================================
   SECTIONS
============================================================ */
.section {
  padding:    80px 0;
  border-top: 1px solid var(--border);
  position:   relative;
}

.section-eyebrow {
  font-family:    var(--font-mono);
  font-size:      .62rem;
  font-weight:    500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color:          var(--accent);
  margin-bottom:  8px;
  display:        flex;
  align-items:    center;
  gap:            10px;
}
.section-eyebrow::before {
  content:  '';
  display:  inline-block;
  width:    20px;
  height:   1px;
  background: var(--accent);
}

.section-title {
  font-family:    var(--font-display);
  font-size:      1.7rem;
  font-weight:    700;
  margin-bottom:  36px;
  color:          var(--text);
  letter-spacing: -.02em;
}

.section-desc {
  color:         var(--muted);
  margin-top:    -20px;
  margin-bottom: 28px;
  max-width:     560px;
  line-height:   1.8;
  font-size:     .95rem;
}

.about-body p {
  font-size:   1.05rem;
  color:       var(--text);
  max-width:   660px;
  line-height: 1.9;
  opacity:     .85;
}

/* ============================================================
   GRIDS
============================================================ */
.grid   { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }

/* ============================================================
   SLIDERS
============================================================ */
.slider-wrap { /* optional outer wrapper — kept for spacing */ }

.slider-card {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--radius);
  overflow:      hidden;
  transition:    border-color var(--t);
}
.slider-card:hover { border-color: rgba(0,212,255,0.22); }

/* Image panel */
.slider {
  position: relative;
  width:    100%;
  overflow: hidden;
}

/* Gallery: taller portrait ratio */
.graduation-slider .slider  { aspect-ratio: 16/10; }

/* Illustrations: widescreen, images kept full inside */
.illustrations-slider .slider { aspect-ratio: 16/9; }

/* Individual slide */
.slide {
  position:   absolute;
  inset:      0;
  width:      100%;
  height:     100%;
  object-fit: cover;
  opacity:    0;
  transition: opacity .9s ease;
  will-change: opacity;
}
.slide.active { opacity: 1; }

/* Illustrations: contain so figures aren't cropped */
.illustrations-slider .slide {
  object-fit: contain;
  background: rgba(2,12,27,0.85);
}

/* Progress bar strip */
.slider-progress {
  height:     3px;
  background: var(--surface2);
  overflow:   hidden;
}
.slider-progress-bar {
  display:    block;
  height:     100%;
  width:      0%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
}

/* Controls row */
.slider-controls {
  display:         flex;
  align-items:     center;
  justify-content: center;
  gap:             12px;
  padding:         14px 16px 12px;
}

/* Prev / Next arrow buttons */
.slider-btn {
  display:       inline-flex;
  align-items:   center;
  justify-content: center;
  width:         32px;
  height:        32px;
  border-radius: 50%;
  border:        1px solid var(--border);
  background:    var(--surface);
  color:         var(--muted);
  font-size:     1rem;
  cursor:        pointer;
  transition:    all var(--t);
  flex-shrink:   0;
  line-height:   1;
}
.slider-btn:hover {
  border-color: var(--border-glow);
  background:   var(--glow);
  color:        var(--accent);
}

/* Dot indicators */
.slider-dots { display: flex; gap: 6px; align-items: center; }
.dot {
  width:         7px;
  height:        7px;
  border-radius: 50%;
  background:    var(--border);
  border:        none;
  cursor:        pointer;
  padding:       0;
  transition:    background var(--t), transform var(--t), width var(--t);
  flex-shrink:   0;
}
.dot.active {
  background: var(--accent);
  transform:  scale(1.4);
  width:      14px;
  border-radius: 4px;
}
.dot:hover { background: var(--accent2); transform: scale(1.2); }

/* ============================================================
   TESTIMONIALS
============================================================ */
.testimonial-card {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--radius);
  padding:       28px 26px;
  position:      relative;
  transition:    border-color var(--t), box-shadow var(--t), transform var(--t);
}
.testimonial-card:hover {
  border-color: rgba(0,212,255,0.26);
  box-shadow:   0 0 28px var(--glow), 0 10px 36px rgba(0,0,0,0.4);
  transform:    translateY(-3px);
}

/* decorative quote mark */
.testimonial-card::before {
  content:       '\201C';
  font-family:   var(--font-display);
  font-size:     7rem;
  line-height:   1;
  color:         rgba(0,212,255,0.06);
  position:      absolute;
  top:  8px;
  left: 16px;
  pointer-events: none;
  user-select:   none;
}

.testimonial-quote {
  font-size:     .88rem;
  line-height:   1.85;
  color:         var(--text);
  opacity:       .82;
  margin-bottom: 20px;
  position:      relative;
  z-index:       1;
  font-style:    italic;
}
.testimonial-author { display: flex; flex-direction: column; gap: 3px; }
.testimonial-author strong { font-size: .88rem; font-weight: 600; color: var(--text); }
.testimonial-author span   { font-size: .75rem; color: var(--muted); line-height: 1.5; }

/* ============================================================
   PROJECTS
============================================================ */
.project-card {
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--radius);
  overflow:      hidden;
  display:       flex;
  flex-direction: column;
  transition:    border-color var(--t), box-shadow var(--t), transform var(--t);
}
.project-card:hover {
  border-color: rgba(0,212,255,0.30);
  box-shadow:   0 0 32px var(--glow), 0 14px 42px rgba(0,0,0,0.5);
  transform:    translateY(-4px);
}

.project-img-wrap {
  width:        100%;
  aspect-ratio: 16/9;
  overflow:     hidden;
  background:   var(--bg2);
}
.project-img-wrap img {
  width:      100%;
  height:     100%;
  object-fit: cover;
  transition: transform .55s ease, filter .55s ease;
  filter:     brightness(.9);
}
.project-card:hover .project-img-wrap img {
  transform: scale(1.055);
  filter:    brightness(1.06);
}

.project-body {
  padding:        18px;
  display:        flex;
  flex-direction: column;
  flex:           1;
}
.project-body h3 {
  font-size:     .88rem;
  font-weight:   600;
  margin-bottom: 8px;
  line-height:   1.45;
  color:         var(--text);
}
.project-body p {
  font-size:     .8rem;
  color:         var(--muted);
  line-height:   1.7;
  flex:          1;
  margin-bottom: 16px;
}
.project-links { display: flex; flex-wrap: wrap; gap: 5px; margin-top: auto; }

/* ============================================================
   PUBLICATIONS
============================================================ */
.pub-list { display: flex; flex-direction: column; }

.pub-item {
  display:               grid;
  grid-template-columns: 130px 1fr;
  gap:                   28px;
  padding:               28px 0;
  border-bottom:         1px solid var(--border);
  align-items:           start;
  transition:            border-color var(--t);
}
.pub-item:last-child        { border-bottom: none; }
.pub-item:hover             { border-bottom-color: rgba(0,212,255,0.22); }

.pub-meta {
  display:        flex;
  flex-direction: column;
  gap:            7px;
  padding-top:    2px;
}
.pub-year {
  font-family:    var(--font-mono);
  font-size:      .75rem;
  font-weight:    500;
  color:          var(--accent);
  letter-spacing: .06em;
}
.pub-status {
  display:        inline-block;
  font-size:      .6rem;
  font-weight:    700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding:        2px 8px;
  border-radius:  3px;
  border:         1px solid;
  width:          fit-content;
}
.status-published { background: rgba(52,211,153,0.10); color: #34D399; border-color: rgba(52,211,153,0.25); }
.status-preprint  { background: rgba(251,191,36,0.10);  color: #FBBB24; border-color: rgba(251,191,36,0.25); }
.status-review    { background: rgba(96,165,250,0.10);  color: #60A5FA; border-color: rgba(96,165,250,0.25); }

.pub-content { display: flex; flex-direction: column; gap: 3px; }
.pub-title   { font-size: .9rem; font-weight: 600; color: var(--text); line-height: 1.45; margin-bottom: 4px; }
.pub-authors { font-size: .78rem; color: var(--muted); line-height: 1.5; }
.pub-venue   { font-size: .76rem; color: var(--muted); font-style: italic; margin-bottom: 6px; }
.pub-link    { font-size: .78rem; font-weight: 500; color: var(--accent); }
.pub-link:hover { opacity: .8; }

/* ============================================================
   CONTACT
============================================================ */
.contact-grid { display: flex; flex-wrap: wrap; gap: 10px; }

.contact-link {
  display:       inline-flex;
  align-items:   center;
  gap:           9px;
  padding:       11px 18px;
  background:    var(--surface);
  border:        1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size:     .83rem;
  font-weight:   500;
  color:         var(--text);
  transition:    all var(--t);
}
.contact-link:hover {
  border-color: var(--border-glow);
  color:        var(--accent);
  background:   var(--glow);
  opacity:      1;
  transform:    translateY(-2px);
  box-shadow:   0 0 16px var(--glow);
}
.contact-icon {
  font-family: var(--font-mono);
  font-size:   .75rem;
  font-weight: 700;
  color:       var(--accent);
  min-width:   1.4em;
  text-align:  center;
}

/* ============================================================
   FOOTER
============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding:    28px 0;
}
.footer-inner {
  display:         flex;
  justify-content: space-between;
  align-items:     center;
  gap:             16px;
  flex-wrap:       wrap;
}
.footer-copy { font-size: .8rem; color: var(--muted); font-weight: 500; }
.footer-tech { font-family: var(--font-mono); font-size: .7rem; color: var(--muted); letter-spacing: .05em; }

/* ============================================================
   SCROLL REVEAL
============================================================ */
.reveal {
  opacity:    0;
  transform:  translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.show { opacity: 1; transform: none; }

/* Stagger children inside a reveal grid */
.grid .reveal:nth-child(1) { transition-delay: 0.00s; }
.grid .reveal:nth-child(2) { transition-delay: 0.07s; }
.grid .reveal:nth-child(3) { transition-delay: 0.14s; }
.grid .reveal:nth-child(4) { transition-delay: 0.21s; }
.grid .reveal:nth-child(5) { transition-delay: 0.28s; }
.grid .reveal:nth-child(6) { transition-delay: 0.35s; }

/* ============================================================
   REDUCED MOTION
============================================================ */
@media (prefers-reduced-motion: reduce) {
  .reveal                        { opacity: 1; transform: none; transition: none; }
  .slide                         { transition: none; }
  .hero-left > *, .hero-card     { animation: none; opacity: 1; }
  .scroll-bar                    { animation: none; }
  html                           { scroll-behavior: auto; }
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 960px) {
  .grid-3     { grid-template-columns: repeat(2,1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-card  { display: none; }
}

@media (max-width: 680px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  /* Mobile nav drawer */
  .nav-links {
    display:          none;
    position:         fixed;
    top:              64px;
    left:             0;
    right:            0;
    background:       rgba(2,12,27,0.97);
    backdrop-filter:  blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom:    1px solid var(--border);
    padding:          14px 20px 20px;
    flex-direction:   column;
    align-items:      flex-start;
    gap:              2px;
    z-index:          199;
  }
  [data-theme="light"] .nav-links {
    background: rgba(240,244,248,0.97);
  }
  .nav-links.open { display: flex; }
  .menu-btn       { display: flex; }

  .site-header { position: sticky; top: 0; }

  /* Publications: stack on mobile */
  .pub-item { grid-template-columns: 1fr; gap: 8px; }
  .pub-meta { flex-direction: row; align-items: center; gap: 8px; }

  /* Hero adjustments */
  .hero-inner { padding-top: 96px; }
  .hero-title { font-size: 1.85rem; }

  /* Sections */
  .section       { padding: 54px 0; }
  .section-title { font-size: 1.4rem; }

  /* Footer */
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 6px; }

  /* Slider controls smaller */
  .slider-btn { width: 28px; height: 28px; font-size: .9rem; }
}