/* ============================================================
   Louis Sungwoo Cho — Portfolio Stylesheet
   Theme: Deep Space Navy · Pure White accents · ITS Engineering
   Fonts: Syne (display) · Space Mono (mono) · DM Sans (body)
   ============================================================ */

:root {
  --bg:        #04080f;
  --bg2:       #070c17;
  --surface:   #0d1424;
  --surface2:  #111929;
  --border:    rgba(255,255,255,0.07);
  --border2:   rgba(255,255,255,0.15);
  --text:      #f0f4ff;
  --text2:     #8a98b8;
  --text3:     #4a566e;
  --white:     #ffffff;
  --blue:      #4f9cf9;
  --cyan:      #22d3ee;
  --green:     #3ecf8e;
  --glow-blue: rgba(79,156,249,0.15);
  --glow-w:    rgba(255,255,255,0.08);

  --font-d: 'Syne', sans-serif;
  --font-m: 'Space Mono', monospace;
  --font-b: 'DM Sans', sans-serif;

  --radius:  12px;
  --radius-l: 20px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1e2a40; border-radius: 10px; }
::selection { background: var(--blue); color: #fff; }

/* ── Canvas background ── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

/* ══════════════════════════════════════════
   NAVIGATION
══════════════════════════════════════════ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.2rem, 5vw, 4rem);
  height: 66px;
  background: rgba(4,8,15,0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, box-shadow 0.3s;
}
#nav.scrolled {
  background: rgba(4,8,15,0.96);
  box-shadow: 0 4px 40px rgba(0,0,0,0.5);
}

.nav-logo {
  font-family: var(--font-m);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.12em;
  cursor: default;
  user-select: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-family: var(--font-m);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text2);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--white);
  transition: width 0.3s var(--ease);
}
.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--white); }

.nav-cta {
  background: var(--white);
  color: #04080f;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  font-family: var(--font-m);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-cta:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(255,255,255,0.2);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--text); border-radius: 2px; transition: all 0.3s;
}

.mob-menu {
  display: none;
  position: fixed;
  top: 66px; left: 0; right: 0;
  z-index: 199;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem 2rem;
  pointer-events: none; opacity: 0; transform: translateY(-10px);
  transition: all 0.3s;
}
.mob-menu.open { display: block; pointer-events: all; opacity: 1; transform: translateY(0); }
.mob-menu ul { list-style: none; }
.mob-menu li { padding: 0.8rem 0; border-bottom: 1px solid var(--border); }
.mob-menu a { font-family: var(--font-d); font-size: 1.2rem; color: var(--text); text-decoration: none; }

/* ══════════════════════════════════════════
   HERO
══════════════════════════════════════════ */
#hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3rem;
  padding: 110px clamp(1.2rem, 7vw, 7rem) 80px;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-m);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  background: rgba(62,207,142,0.08);
  border: 1px solid rgba(62,207,142,0.25);
  padding: 0.32rem 0.85rem;
  border-radius: 100px;
  margin-bottom: 1.6rem;
}
.dot-pulse {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(62,207,142,0.5); }
  50% { box-shadow: 0 0 0 5px rgba(62,207,142,0); }
}

.hero-name {
  font-family: var(--font-d);
  font-size: clamp(2.5rem, 6.5vw, 6rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 1.4rem;
}
.hero-name em {
  font-style: italic;
  color: var(--text2);
}

.hero-sub {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem 0;
  font-family: var(--font-m);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--text2);
  margin-bottom: 1.4rem;
}
.hdiv { margin: 0 0.65rem; color: var(--blue); }

.hero-desc {
  font-size: 0.98rem;
  color: var(--text2);
  max-width: 460px;
  margin-bottom: 2rem;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.btn-p {
  background: var(--white);
  color: #04080f;
  padding: 0.78rem 1.75rem;
  border-radius: 8px;
  font-family: var(--font-m);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.25s var(--ease);
}
.btn-p:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255,255,255,0.2);
}

.btn-g {
  border: 1px solid var(--border2);
  color: var(--text);
  padding: 0.78rem 1.75rem;
  border-radius: 8px;
  font-family: var(--font-m);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 0.25s;
}
.btn-g:hover {
  border-color: var(--white);
  color: var(--white);
  background: rgba(255,255,255,0.05);
}

.hero-socials {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.hero-socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all 0.2s;
  padding: 8px;
}
.hero-socials a:hover {
  border-color: var(--border2);
  background: var(--surface2);
  transform: translateY(-2px);
}
.hero-socials img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: brightness(0.8);
}
.hero-socials a:hover img { filter: brightness(1); }

/* ── Profile Photo ── */
.hero-photo {
  display: flex;
  justify-content: center;
  align-items: center;
}
.photo-frame {
  position: relative;
  width: 320px; height: 380px;
}
.photo-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-l);
  border: 1px solid var(--border2);
  display: block;
  box-shadow: 0 40px 80px rgba(0,0,0,0.7);
}
.photo-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  animation: ring-spin linear infinite;
  pointer-events: none;
}
.ring-1 {
  width: 380px; height: 380px;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%) rotate(0deg);
  animation-duration: 25s;
  border-color: rgba(79,156,249,0.15);
}
.ring-2 {
  width: 440px; height: 440px;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%) rotate(0deg);
  animation-duration: 40s;
  animation-direction: reverse;
  border-color: rgba(34,211,238,0.08);
  border-style: dashed;
}
@keyframes ring-spin {
  from { transform: translate(-50%,-50%) rotate(0deg); }
  to   { transform: translate(-50%,-50%) rotate(360deg); }
}
.photo-badge {
  position: absolute;
  bottom: -16px; right: -16px;
  background: var(--white);
  color: #04080f;
  border-radius: 10px;
  padding: 0.65rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  font-family: var(--font-m);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
  line-height: 1.3;
}

/* ── Scroll hint ── */
.scroll-hint {
  position: absolute;
  bottom: 2.2rem;
  left: clamp(1.2rem, 7vw, 7rem);
  display: flex; flex-direction: column; gap: 0.5rem;
  z-index: 2;
}
.scroll-hint span {
  font-family: var(--font-m); font-size: 0.62rem;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--text3);
}
.scroll-line {
  width: 1px; height: 45px;
  background: linear-gradient(to bottom, var(--text3), transparent);
  animation: sline 2s ease-in-out infinite;
}
@keyframes sline {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50%       { transform: scaleY(0.6); opacity: 1; }
}

/* ══════════════════════════════════════════
   SECTION COMMONS
══════════════════════════════════════════ */
section:not(#hero) {
  padding: 6.5rem clamp(1.2rem, 7vw, 7rem);
  position: relative;
  z-index: 1;
}
.alt-bg { background: rgba(7,12,23,0.9); }

.sec-label {
  font-family: var(--font-m);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.75rem;
}

.sec-title {
  font-family: var(--font-d);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 2.8rem;
}
.sec-title em {
  font-style: italic;
  color: var(--text2);
}

/* ══════════════════════════════════════════
   ABOUT
══════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p {
  font-size: 0.97rem;
  color: var(--text2);
  margin-bottom: 1.1rem;
  line-height: 1.85;
}
.about-text p strong { color: var(--text); font-weight: 500; }

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--font-d);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.plus { font-family: var(--font-d); font-size: 2rem; font-weight: 800; color: var(--text2); }
.stat-lbl {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-top: 0.25rem;
}

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
}
.i-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.83rem;
  color: var(--text2);
  transition: all 0.25s;
  cursor: default;
}
.i-card:hover {
  border-color: var(--border2);
  background: var(--surface2);
  color: var(--white);
  transform: translateY(-2px);
}
.i-icon { font-size: 1.2rem; flex-shrink: 0; }

/* ══════════════════════════════════════════
   EXPERIENCE
══════════════════════════════════════════ */
.exp-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: start;
}

.timeline { position: relative; padding-left: 1.8rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.3), transparent);
}

.titem { position: relative; padding: 0 0 3rem 2.2rem; }
.titem:last-child { padding-bottom: 0; }

.tdot {
  position: absolute;
  left: -1.8rem; top: 6px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 10px rgba(255,255,255,0.4);
  transform: translateX(-3px);
}

.tdate {
  font-family: var(--font-m);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.torg {
  font-family: var(--font-d);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.15rem;
}
.trole {
  font-size: 0.85rem;
  color: var(--blue);
  margin-bottom: 0.75rem;
}
.tbullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.tbullets li {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.7;
  padding-left: 1rem;
  position: relative;
}
.tbullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text3);
  font-size: 0.75rem;
}

.exp-logos { display: flex; flex-direction: column; gap: 0.85rem; }
.exp-logo-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: all 0.25s;
}
.exp-logo-item:hover {
  border-color: var(--border2);
  transform: translateX(4px);
  background: var(--surface2);
}
.exp-logo-item img {
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
  filter: brightness(0.85);
}
.exp-logo-item:hover img { filter: brightness(1); }
.einfo { display: flex; flex-direction: column; gap: 0.15rem; }
.einfo strong { font-family: var(--font-d); font-size: 0.9rem; font-weight: 600; color: var(--white); }
.einfo span { font-family: var(--font-m); font-size: 0.65rem; color: var(--text3); }

/* ══════════════════════════════════════════
   PROJECTS
══════════════════════════════════════════ */

/* Featured project */
.proj-card.feat {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  margin-bottom: 1.1rem;
  transition: all 0.3s var(--ease);
}
.proj-card.feat:hover {
  border-color: var(--border2);
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}
.proj-img-wrap { overflow: hidden; }
.proj-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.75);
  transition: filter 0.3s, transform 0.5s;
}
.proj-card.feat:hover .proj-img-wrap img {
  filter: brightness(0.85);
  transform: scale(1.02);
}

/* Project grid */
.proj-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.proj-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s var(--ease);
}
.proj-card:hover {
  border-color: var(--border2);
  transform: translateY(-5px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

.proj-img {
  width: 100%;
  height: 175px;
  object-fit: cover;
  display: block;
  filter: brightness(0.75);
  transition: filter 0.3s, transform 0.5s;
}
.proj-card:hover .proj-img {
  filter: brightness(0.9);
  transform: scale(1.03);
}

.proj-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1;
}
.proj-tag {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.2);
  padding: 0.2rem 0.65rem;
  border-radius: 100px;
  width: fit-content;
}
.proj-card h3 {
  font-family: var(--font-d);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
}
.proj-card.feat h3 { font-size: 1.5rem; }
.proj-card p {
  font-size: 0.86rem;
  color: var(--text2);
  line-height: 1.75;
  flex: 1;
}
.proj-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.2rem;
}
.proj-tech span {
  font-family: var(--font-m);
  font-size: 0.62rem;
  color: var(--blue);
  background: rgba(79,156,249,0.1);
  border: 1px solid rgba(79,156,249,0.2);
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
}
.proj-link {
  font-family: var(--font-m);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  margin-top: 0.3rem;
  transition: color 0.2s;
}
.proj-link:hover { color: var(--white); }

/* ══════════════════════════════════════════
   EDUCATION
══════════════════════════════════════════ */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s var(--ease);
}
.edu-card:hover {
  border-color: var(--border2);
  transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

.edu-header {
  position: relative;
  background: linear-gradient(135deg, #0a1628 0%, #0d1e38 100%);
  padding: 2rem 2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
.edu-logo {
  height: 36px;
  object-fit: contain;
  filter: brightness(0.9);
}
.edu-badge {
  font-family: var(--font-m);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.85rem;
  border-radius: 100px;
}
.ms-badge {
  color: var(--cyan);
  background: rgba(34,211,238,0.12);
  border: 1px solid rgba(34,211,238,0.3);
}
.bs-badge {
  color: var(--blue);
  background: rgba(79,156,249,0.12);
  border: 1px solid rgba(79,156,249,0.3);
}

.edu-body {
  padding: 1.75rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}
.edu-date {
  font-family: var(--font-m);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.2rem;
}
.edu-degree {
  font-family: var(--font-d);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.edu-degree em {
  font-style: italic;
  color: var(--text2);
  font-size: 1.1rem;
}
.edu-field {
  font-family: var(--font-b);
  font-size: 0.95rem;
  color: var(--text2);
  font-weight: 400;
}
.edu-school {
  font-family: var(--font-m);
  font-size: 0.68rem;
  color: var(--text3);
  letter-spacing: 0.04em;
}
.edu-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 0.85rem 0;
}
.edu-details {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 0.5rem;
}
.edu-detail-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 0.75rem;
  align-items: baseline;
}
.edu-detail-label {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  white-space: nowrap;
}
.edu-detail-val {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.5;
}
.edu-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.edu-tags span {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--blue);
  background: rgba(79,156,249,0.1);
  border: 1px solid rgba(79,156,249,0.2);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

/* Campus strip */
.edu-campus {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.5rem;
  transition: border-color 0.25s;
}
.edu-campus:hover { border-color: var(--border2); }
.edu-campus-img {
  height: 32px;
  object-fit: contain;
  filter: brightness(0.85);
  flex-shrink: 0;
}
.edu-campus-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.edu-campus-name {
  font-family: var(--font-d);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--white);
}
.edu-campus-rank {
  font-family: var(--font-m);
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 0.04em;
}

/* Education responsive */
@media (max-width: 768px) {
  .edu-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════
   PUBLICATIONS
══════════════════════════════════════════ */
.pubs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.pub-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all 0.25s;
}
.pub-card:hover {
  border-color: var(--border2);
  background: var(--surface2);
}
.pub-type {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  width: fit-content;
}
.pub-type.journal {
  color: var(--green);
  background: rgba(62,207,142,0.1);
  border: 1px solid rgba(62,207,142,0.25);
}
.pub-type.thesis {
  color: var(--blue);
  background: rgba(79,156,249,0.1);
  border: 1px solid rgba(79,156,249,0.25);
}
.pub-type.report {
  color: var(--cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.2);
}
.pub-card h4 {
  font-family: var(--font-d);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}
.pub-meta {
  font-size: 0.83rem;
  color: var(--text2);
  line-height: 1.6;
}
.pub-meta em { color: var(--text3); font-style: italic; }
.pub-link {
  font-family: var(--font-m);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  margin-top: auto;
  transition: color 0.2s;
}
.pub-link:hover { color: var(--white); }

/* ══════════════════════════════════════════
   AWARDS
══════════════════════════════════════════ */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.award-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}
.award-card:hover {
  border-color: var(--border2);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.4);
}
.award-card > img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  filter: brightness(0.7);
}
.award-body { padding: 1.4rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.award-date {
  font-family: var(--font-m);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
}
.award-card h4 {
  font-family: var(--font-d);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.3;
}
.award-card p { font-size: 0.82rem; color: var(--text2); line-height: 1.7; }

/* ══════════════════════════════════════════
   SKILLS
══════════════════════════════════════════ */
.skills-wrap { display: flex; flex-direction: column; gap: 2.2rem; }
.sg h4 {
  font-family: var(--font-m);
  font-size: 0.66rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 0.85rem;
}

.pills-with-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.pill-icon {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.4rem 1rem 0.4rem 0.6rem;
  transition: all 0.2s;
  cursor: default;
}
.pill-icon:hover {
  border-color: var(--border2);
  background: var(--surface2);
  color: var(--white);
}
.pill-icon img { width: 22px; height: 22px; object-fit: contain; }
.pill-icon span { font-size: 0.84rem; color: var(--text2); }
.pill-icon:hover span { color: var(--white); }

.pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pills span {
  font-size: 0.84rem;
  color: var(--text2);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.38rem 0.95rem;
  border-radius: 100px;
  transition: all 0.2s;
  cursor: default;
}
.pills span:hover {
  border-color: var(--border2);
  color: var(--white);
  background: var(--surface2);
}

/* ══════════════════════════════════════════
   CONTACT
══════════════════════════════════════════ */
#contact { text-align: center; }
.contact-inner { max-width: 700px; margin: 0 auto; }
.contact-sub {
  font-size: 1rem;
  color: var(--text2);
  margin-bottom: 2.8rem;
  line-height: 1.85;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  text-align: left;
}
.c-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  transition: all 0.25s;
}
.c-card:hover {
  border-color: var(--border2);
  background: var(--surface2);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
}
.c-icon {
  width: 42px; height: 42px;
  border-radius: 9px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.c-logo {
  width: 42px; height: 42px;
  object-fit: contain;
  border-radius: 9px;
  padding: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border2);
  flex-shrink: 0;
}
.c-card strong {
  display: block;
  font-family: var(--font-d);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
  color: var(--white);
}
.c-card small {
  font-family: var(--font-m);
  font-size: 0.63rem;
  color: var(--text3);
}

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border);
  padding: 1.8rem clamp(1.2rem, 7vw, 7rem);
  position: relative;
  z-index: 1;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-logo { font-family: var(--font-d); font-size: 0.95rem; font-weight: 700; color: var(--white); }
.footer-copy { font-family: var(--font-m); font-size: 0.66rem; color: var(--text3); letter-spacing: 0.04em; }
.footer-uni  { font-family: var(--font-m); font-size: 0.66rem; color: var(--cyan); }

/* ══════════════════════════════════════════
   REVEAL ANIMATIONS
══════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.10s; }
.d2 { transition-delay: 0.20s; }
.d3 { transition-delay: 0.35s; }
.d4 { transition-delay: 0.50s; }
.d5 { transition-delay: 0.65s; }

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 1100px) {
  .awards-grid { grid-template-columns: 1fr 1fr; }
  .proj-grid   { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1024px) {
  #hero { grid-template-columns: 1fr; padding-bottom: 4rem; }
  .hero-photo { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .exp-layout { grid-template-columns: 1fr; }
  .proj-card.feat { grid-template-columns: 1fr; }
  .proj-img-wrap img { height: 240px; width: 100%; object-fit: cover; }
  .pubs-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .proj-grid { grid-template-columns: 1fr; }
  .awards-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .about-cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .hero-sub { flex-direction: column; gap: 0.2rem; }
  .hdiv { display: none; }
  .about-cards { grid-template-columns: 1fr; }
  .about-stats { gap: 1.5rem; }
}