/* =============================================================
   JOYTU KHISHA — Portfolio
   Pure white · Gray BW · Accent #4f8ef7 (sparingly)
   Headlines: Cormorant Garamond · Body: DM Sans
   ============================================================= */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #ffffff;
  color: #111111;
  line-height: 1.6;
  overflow-x: hidden;
}
ul { list-style: none; }
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }

/* ── CSS Variables ── */
:root {
  --white: #ffffff;
  --surface: #f8f8f8;
  --border: #e5e5e5;
  --text: #111111;
  --text-secondary: #6b6b6b;
  --text-light: #999999;
  --accent: #4f8ef7;
  --nav-h: 64px;
  --container: 1200px;
  --section-pad: 100px;
}

/* ────────────────────────────────────────────
   SPLASH SCREEN
──────────────────────────────────────────── */
#splash {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.45s ease;
}
#splash.splash-out {
  opacity: 0;
  pointer-events: none;
}
.splash-logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  will-change: transform;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease;
}
.splash-logo-wrap svg {
  width: 200px;
  display: block;
  filter: none !important;
}
.splash-loading-text {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--text-light);
  text-transform: uppercase;
  filter: none !important;
}
.splash-logo-wrap .rect-fill  { fill: var(--accent); }
.splash-logo-wrap .poly-stroke {
  fill: none;
  stroke: var(--accent);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-miterlimit: 10;
}

/* Hide real nav-logo while splash is active */
body.splashing .nav-logo { opacity: 0 !important; }

/* ── All images & videos: grayscale ── */
img, video { filter: grayscale(1); }

/* ── Accent text helper ── */
.accent-text { color: var(--accent); }

/* ── Container ── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
}

/* ── Section padding ── */
section { padding: var(--section-pad) 0; }
section#hero { padding: 0; }

/* ── Section header ── */
.section-header { margin-bottom: 64px; }
.section-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-header h2 {
  font-family: 'Cormorant Garamond', serif;  /* serif fallback, not sans-serif */
  font-size: 42px;
  font-weight: 300;                          /* change 100 → 300 */
  letter-spacing: 0;                         /* remove the -0.02em */
  color: var(--text);
}

/* ── Fade-in animations ── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── Tags / Pills ── */
.tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: opacity 0.2s;
  filter: none !important;
}
.btn-primary:hover { opacity: 0.88; }
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover { border-color: var(--text); }

/* ────────────────────────────────────────────
   NAVBAR
──────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 40px;
  gap: 32px;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s;
}
#navbar.scrolled {
  background: rgba(255,255,255,0.97);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}
.nav-logo {
  flex-shrink: 0;
}
.nav-logo svg {
  height: 30px;
  width: auto;
  display: block;
  filter: none !important;
}

/* Logo: white by default (transparent navbar) → accent on scroll */
.nav-logo .rect-fill {
  fill: #ffffff;
  transition: fill 0.3s ease;
}
.nav-logo .poly-stroke {
  fill: none;
  stroke: #ffffff;
  stroke-width: 14;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-miterlimit: 10;
  transition: stroke 0.3s ease;
}
#navbar.scrolled .nav-logo .rect-fill { fill: var(--accent); }
#navbar.scrolled .nav-logo .poly-stroke { stroke: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}
.nav-link {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  -webkit-text-stroke: 1px #fff;
  paint-order: stroke fill;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s;
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-github {
  font-size: 18px;
  color: var(--text-secondary);
  transition: color 0.2s;
  filter: none !important;
}
.nav-github:hover { color: var(--text); }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: 8px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* ────────────────────────────────────────────
   HERO
──────────────────────────────────────────── */
#hero {
  height: 100vh;
  min-height: 640px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  display: flex;
  flex: 1;
  min-height: 0;
}
.hero-text {
  flex: 0 0 58%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 80px 80px 56px;
  order: 2;
}
.hero-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 28px;
}
.hero-name {
  font-family: 'Cormorant Garamond', sans-serif;
  font-size: clamp(64px, 7.5vw, 110px);
  font-weight: 100;
  line-height: 1.0;
  color: var(--text);
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
}
.name-heavy {
  font-weight: 200;
  /* letter-spacing: 0.04em; */
  display: block;
}
.name-thin {
  font-weight: 50;
  /* letter-spacing: 0.04em; */
  display: block;
}
.hero-role {
  font-size: 15px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}
.hero-bio {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 460px;
  line-height: 1.7;
  margin-bottom: 36px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-meta {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--text-light);
}
.hero-meta i {
  color: var(--accent);
  margin-right: 6px;
  filter: none !important;
}

/* Photo strip */
.hero-strip {
  flex: 0 0 42%;
  display: flex;
  height: 100%;
  gap: 3px;
  overflow: hidden;
  order: 1;
}
.strip-col {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.strip-col img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(1);
  transition: transform 0.6s ease;
}
.strip-col:hover img { transform: scale(1.03); }

/* Scroll indicator — sits over photo strip (left side) */
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 36px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-light);
  animation: pulse-down 2s infinite;
}
.hero-scroll i { filter: none !important; }
@keyframes pulse-down {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(4px); opacity: 1; }
}

/* ────────────────────────────────────────────
   ABOUT
──────────────────────────────────────────── */
#about { background: var(--white); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  margin-bottom: 72px;
  align-items: start;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.stat-num {
  font-size: 40px;
  font-weight: 800;
  /* letter-spacing: -0.02em; */
  color: var(--text);
  line-height: 1;
}
.stat-num span {
  font-size: 28px;
  color: var(--accent);
}
.stat-text {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.about-content {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}
.about-photo {
  flex-shrink: 0;
  width: 230px;
}
.about-photo img {
  width: 100%;
  aspect-ratio: 1/2.5;
  object-fit: cover;
  object-position: right center;
  filter: grayscale(1);
}
.about-bio p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}
.about-bio p:last-child { margin-bottom: 0; }

/* Education */
.education {
  padding-top: 56px;
  border-top: 1px solid var(--border);
}
.edu-heading {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 32px;
}
.edu-list { display: flex; flex-direction: column; gap: 32px; }
.edu-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: start;
}
.edu-year {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 3px;
}
.edu-degree {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.edu-school {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.edu-note {
  font-size: 13px;
  color: var(--text-light);
}

/* ────────────────────────────────────────────
   EXPERIENCE
──────────────────────────────────────────── */
#experience { background: var(--surface); }
.timeline { position: relative; }
.tl-item {
  display: grid;
  grid-template-columns: 220px 48px 1fr;
  margin-bottom: 56px;
  position: relative;
}
.tl-item:last-child { margin-bottom: 0; }
.tl-left { padding-top: 2px; }
.tl-period {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}
.tl-company {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 3px;
}
.tl-location {
  font-size: 12px;
  color: var(--text-light);
}
.tl-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}
.tl-connector::before {
  content: '';
  position: absolute;
  top: 18px; bottom: calc(-56px);
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  background: var(--border);
}
.tl-item:last-child .tl-connector::before { display: none; }
.tl-dot {
  width: 9px;
  height: 9px;
  background: var(--accent);
  border-radius: 50%;
  margin-top: 5px;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.tl-right { padding-left: 8px; }
.tl-role {
  font-family: 'Cormorant Garamond', sans-serif;
  font-size: 18px;
  font-weight: 200;
  color: var(--text);
  margin-bottom: 12px;
}
.tl-bullets {
  margin-bottom: 16px;
  padding-left: 0;
}
.tl-bullets li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-left: 16px;
  position: relative;
  margin-bottom: 6px;
}
.tl-bullets li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--text-light);
}
.tl-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ────────────────────────────────────────────
   PROJECTS
──────────────────────────────────────────── */
#projects { background: var(--white); }

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 48px;
}
.filter-tab {
  padding: 7px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.filter-tab:hover { border-color: var(--text); color: var(--text); }
.filter-tab.active {
  background: var(--text);
  border-color: var(--text);
  color: var(--white);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.projects-loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--text-light);
  font-size: 14px;
}
.projects-loading i { margin-right: 8px; filter: none !important; }

.project-card {
  background: var(--white);
  border: 1px solid var(--border);
  overflow: hidden;
  cursor: default;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.06);
}
.project-thumb {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--surface);
  position: relative;
}
.project-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
  transition: transform 0.5s ease;
}
.project-card:hover .project-thumb img { transform: scale(1.05); }
.project-thumb.no-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
}
.no-thumb-inner {
  text-align: center;
  padding: 24px;
}
.no-thumb-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 8px;
}
.no-thumb-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
}
.project-info { padding: 20px 20px 20px; }
.project-year {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.project-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.35;
}
.project-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 14px;
}
.project-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.project-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.2s;
  filter: none !important;
}
.project-link:hover { color: var(--accent); }
.project-link i { filter: none !important; font-size: 11px; }

/* ────────────────────────────────────────────
   RESEARCH
──────────────────────────────────────────── */
#research { background: var(--surface); }

.dart-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  margin-bottom: 80px;
  align-items: start;
}
.dart-images { display: flex; flex-direction: column; gap: 6px; }
.dart-img-main {
  overflow: hidden;
  background: var(--border);
  aspect-ratio: 4/3;
}
.dart-img-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
  transition: transform 0.5s;
}
.dart-img-main:hover img { transform: scale(1.03); }
.dart-img-side { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.dart-img-side img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  filter: grayscale(1);
}
.dart-meta {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.dart-title {
  font-family: 'Cormorant Garamond', sans-serif;
  font-size: 28px;
  font-weight: 200;
  /* letter-spacing: -0.02em; */
  color: var(--text);
  margin-bottom: 20px;
}
.dart-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 14px;
}
.dart-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 20px 0 24px;
}
.dart-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.dart-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s;
  filter: none !important;
}
.dart-link:hover { border-color: var(--accent); color: var(--accent); }
.dart-link i { filter: none !important; }

/* Publications */
.pub-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 32px;
}
.pub-list { display: flex; flex-direction: column; gap: 32px; }
.pub-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }
.pub-year {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  padding-top: 3px;
}
.pub-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.pub-authors {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.pub-venue {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 10px;
  font-style: italic;
}
.pub-doi {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  transition: opacity 0.2s;
  filter: none !important;
}
.pub-doi:hover { opacity: 0.75; }
.pub-doi i { filter: none !important; font-size: 10px; }

/* ────────────────────────────────────────────
   SKILLS
──────────────────────────────────────────── */
#skills { background: var(--white); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 64px;
}
.skill-group-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-tag {
  display: inline-block;
  padding: 5px 11px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 12px;
  color: var(--text-secondary);
  transition: border-color 0.2s, color 0.2s;
}
.skill-tag:hover { border-color: var(--text-secondary); color: var(--text); }

/* ────────────────────────────────────────────
   RECOGNITION
──────────────────────────────────────────── */
#recognition { background: var(--surface); }

.awards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 72px;
}
.award-card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 28px 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.award-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.award-year {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 14px;
}
.award-icon {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  filter: none !important;
}
.award-icon i { filter: none !important; }
.award-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.3;
}
.award-body {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}
.award-link {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: opacity 0.2s;
  filter: none !important;
}
.award-link:hover { opacity: 0.75; }
.award-link i { filter: none !important; font-size: 10px; }

.certs-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 28px;
}
.certs-gallery {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.cert-thumb {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--border);
  cursor: pointer;
  position: relative;
}
.cert-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1);
  transition: transform 0.4s ease, filter 0.4s ease;
}
.cert-thumb:hover img {
  transform: scale(1.05);
  filter: grayscale(1);
}
.cert-thumb-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}
.cert-thumb:hover .cert-thumb-overlay { background: rgba(0,0,0,0.12); }
.cert-thumb-overlay i {
  color: #fff;
  font-size: 18px;
  opacity: 0;
  transition: opacity 0.3s;
  filter: none !important;
}
.cert-thumb:hover .cert-thumb-overlay i { opacity: 1; }

/* ────────────────────────────────────────────
   CONTACT
──────────────────────────────────────────── */
#contact { background: var(--white); }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-intro p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}
.contact-items { display: flex; flex-direction: column; gap: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
a.contact-item:hover { border-color: var(--accent); }
.contact-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  flex-shrink: 0;
  filter: none !important;
}
.contact-icon i { filter: none !important; }
.contact-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 3px;
}
.contact-val {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

/* ────────────────────────────────────────────
   FOOTER
──────────────────────────────────────────── */
#footer {
  padding: 32px 0;
  background: var(--white);
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-logo svg {
  height: 24px;
  width: auto;
  display: block;
  filter: none !important;
}
.footer-logo .rect-fill { fill: var(--accent); }
.footer-logo .poly-stroke {
  fill: none;
  stroke: var(--accent);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-miterlimit: 10;
}
.footer-copy {
  font-size: 13px;
  color: var(--text-light);
}
.footer-top {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.2s;
  filter: none !important;
}
.footer-top:hover { border-color: var(--text); color: var(--text); }
.footer-top i { filter: none !important; }

/* ────────────────────────────────────────────
   LIGHTBOX
──────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.lightbox.active {
  opacity: 1;
  pointer-events: all;
}
.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 24px;
  cursor: pointer;
  transition: color 0.2s;
  filter: none !important;
}
.lightbox-close:hover { color: #fff; }
.lightbox-close i { filter: none !important; }
.lightbox-content {
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
}
#lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  filter: grayscale(1) !important;
}
#lightbox-caption {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  margin-top: 14px;
}

/* ────────────────────────────────────────────
   PROJECT MODAL
──────────────────────────────────────────── */
.proj-modal {
  position: fixed; inset: 0; z-index: 1100;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.proj-modal.active { opacity: 1; pointer-events: all; }
.pm-backdrop {
  position: absolute; inset: 0; background: rgba(0,0,0,0.75);
}
.pm-panel {
  position: relative; z-index: 1; background: #fff;
  width: 92vw; max-width: 1140px; height: 86vh;
  display: flex; flex-direction: column; overflow: hidden;
}
.pm-close {
  position: absolute; top: 12px; right: 12px; z-index: 10;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--border); cursor: pointer;
  font-size: 15px; color: var(--text-secondary);
  filter: none !important; transition: color 0.2s, border-color 0.2s;
}
.pm-close:hover { color: var(--text); border-color: var(--text-light); }
.pm-close i { filter: none !important; }
.pm-inner {
  display: flex; height: 100%; overflow: hidden;
}
/* LEFT */
.pm-left {
  flex: 0 0 36%; padding: 48px 36px; overflow-y: auto;
  border-right: 1px solid var(--border);
}
.pm-meta {
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-light); margin-bottom: 12px;
}
.pm-title {
  font-family: 'Raleway', sans-serif; font-weight: 100;
  font-size: 28px; line-height: 1.1; margin-bottom: 10px; color: var(--text);
}
.pm-role {
  font-size: 13px; color: var(--accent); margin-bottom: 6px; font-weight: 500;
}
.pm-status {
  font-size: 12px; color: var(--text-light); margin-bottom: 20px;
}
.pm-desc {
  font-size: 14px; line-height: 1.7; color: var(--text-secondary);
  margin-bottom: 20px;
}
.pm-section-label {
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-light); margin-bottom: 8px; margin-top: 16px;
}
.pm-tech { margin-bottom: 16px; }
.pm-tech .tag, .pm-tags .tag { margin: 2px; }
.pm-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.pm-extlink {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; padding: 6px 12px; border: 1px solid var(--border);
  color: var(--text-secondary); text-decoration: none;
  transition: all 0.2s; filter: none !important;
}
.pm-extlink:hover { border-color: var(--accent); color: var(--accent); }
.pm-extlink i { filter: none !important; font-size: 11px; }
/* RIGHT */
.pm-right {
  flex: 1; display: flex; flex-direction: column; padding: 20px;
  gap: 12px; overflow: hidden; background: var(--surface);
}
/* Thumb strip */
.pm-thumbs {
  display: flex; gap: 8px; overflow-x: auto; flex-shrink: 0;
  padding-bottom: 4px;
}
.pm-thumbs::-webkit-scrollbar { height: 3px; }
.pm-thumbs::-webkit-scrollbar-track { background: var(--border); }
.pm-thumbs::-webkit-scrollbar-thumb { background: var(--accent); }
img.pm-thumb {
  width: 88px; height: 60px; object-fit: cover; flex-shrink: 0;
  cursor: pointer; filter: grayscale(1); border: 2px solid transparent;
  transition: border-color 0.2s, opacity 0.2s; opacity: 0.6;
}
img.pm-thumb:hover { opacity: 0.9; }
img.pm-thumb.active { border-color: var(--accent); opacity: 1; filter: grayscale(0.3); }
.pm-thumb-yt, .pm-thumb-vid {
  width: 88px; height: 60px; flex-shrink: 0; cursor: pointer;
  background: #111; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 4px;
  border: 2px solid transparent; transition: border-color 0.2s; opacity: 0.7;
}
.pm-thumb-yt:hover, .pm-thumb-vid:hover { opacity: 1; }
.pm-thumb-yt.active, .pm-thumb-vid.active { border-color: var(--accent); opacity: 1; }
.pm-thumb-yt i, .pm-thumb-vid i {
  color: #fff; font-size: 18px; filter: none !important;
}
.pm-thumb-yt span, .pm-thumb-vid span {
  color: rgba(255,255,255,0.7); font-size: 9px; text-align: center;
  padding: 0 4px; line-height: 1.2;
}
.pm-thumb-yt i { color: #ff4444; }
/* Main viewer */
.pm-viewer {
  flex: 1; background: #000; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.pm-viewer img {
  max-width: 100%; max-height: 100%; object-fit: contain; filter: grayscale(1);
}
.pm-viewer video {
  max-width: 100%; max-height: 100%; object-fit: contain;
}
.pm-viewer iframe {
  width: 100%; height: 100%; border: none;
}
@media (max-width: 767px) {
  .pm-panel { width: 100vw; height: 100vh; max-width: none; }
  .pm-inner { flex-direction: column; }
  .pm-left { flex: none; max-height: 45vh; border-right: none;
    border-bottom: 1px solid var(--border); padding: 24px 20px; }
  .pm-right { flex: 1; padding: 12px; }
  img.pm-thumb, .pm-thumb-yt, .pm-thumb-vid { width: 68px; height: 48px; }
}

/* ────────────────────────────────────────────
   RESPONSIVE — Tablet (< 1024px)
──────────────────────────────────────────── */
@media (max-width: 1023px) {
  :root { --section-pad: 72px; }
  .container { padding: 0 32px; }
  #navbar { padding: 0 24px; }

  .hero-text { padding: 100px 40px 60px 40px; flex: 0 0 52%; }
  .hero-strip { flex: 0 0 48%; }
  .hero-name { font-size: clamp(48px, 5vw, 72px); }

  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-stats { grid-template-columns: repeat(4, 1fr); gap: 20px; }

  .tl-item { grid-template-columns: 160px 40px 1fr; }

  .projects-grid { grid-template-columns: repeat(2, 1fr); }

  .dart-feature { grid-template-columns: 1fr; gap: 48px; }
  .dart-images { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .dart-img-main { aspect-ratio: 16/10; }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }

  .awards-grid { grid-template-columns: repeat(2, 1fr); }

  .certs-gallery { grid-template-columns: repeat(4, 1fr); }

  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
}

/* ────────────────────────────────────────────
   RESPONSIVE — Mobile (< 768px)
──────────────────────────────────────────── */
@media (max-width: 767px) {
  :root { --section-pad: 56px; }
  .container { padding: 0 20px; }
  #navbar { padding: 0 20px; gap: 12px; }

  /* Logo: white on transparent, accent on scrolled (same as desktop) */
  /* (desktop rules already handle this — no override needed) */

  /* Hamburger: white on transparent navbar, dark when scrolled */
  .nav-hamburger span { background: #ffffff; }
  #navbar.scrolled .nav-hamburger span { background: var(--text); }

  .nav-links { display: none; flex-direction: column; gap: 0; }
  .nav-links.open {
    display: flex;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px 24px;
    z-index: 999;
  }
  .nav-links.open li { border-bottom: 1px solid var(--border); }
  .nav-links.open .nav-link {
    display: block;
    padding: 14px 0;
    font-size: 14px;
    text-transform: none;
    letter-spacing: 0;
    color: var(--text-secondary);
    -webkit-text-stroke: 1px transparent;
  }
  .nav-links.open .nav-link:hover,
  .nav-links.open .nav-link.active {
    color: var(--text);
  }
  .nav-hamburger { display: flex; margin-left: auto; }
  .nav-github { display: none; }
  .nav-linkedin { display: none; }

  /* Hero mobile: stacked */
  #hero { height: auto; min-height: 100svh; }
  .hero-inner { flex-direction: column; }
  .hero-strip {
    order: 0;
    flex: 0 0 55vw;
    height: 55vw;
    width: 100%;
  }
  .hero-text {
    order: 1;
    flex: none;
    padding: 40px 20px 32px;
  }
  .hero-name { font-size: clamp(44px, 10vw, 60px); }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn-primary, .hero-cta .btn-secondary { text-align: center; }
  .hero-scroll { left: 20px; }

  .section-header h2 { font-size: 32px; }

  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .about-content { flex-direction: column; }
  .about-photo { width: 120px; }

  .edu-item { grid-template-columns: 1fr; gap: 8px; }

  .tl-item { grid-template-columns: 1fr; gap: 8px; }
  .tl-connector { display: none; }
  .tl-left { padding-bottom: 8px; border-bottom: 1px solid var(--border); }

  .projects-grid { grid-template-columns: 1fr; }

  .dart-images { grid-template-columns: 1fr; }
  .dart-img-side { grid-template-columns: 1fr 1fr; }

  .skills-grid { grid-template-columns: 1fr; gap: 32px; }

  .awards-grid { grid-template-columns: 1fr; }

  .certs-gallery { grid-template-columns: repeat(3, 1fr); }

  .pub-item { grid-template-columns: 1fr; gap: 8px; }

  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
}

@media (max-width: 480px) {
  .certs-gallery { grid-template-columns: repeat(2, 1fr); }
  .filter-tabs { gap: 6px; }
  .filter-tab { padding: 6px 12px; font-size: 12px; }
}