/* ─────────────────────────────────────────
   VARIABLES & RESET
───────────────────────────────────────── */
:root {
  --green: #39ff14;
  --green-dim: rgba(57,255,20,0.25);
  --green-glow: rgba(57,255,20,0.12);
  --bg: #050505;
  --bg-card: #0d0d0d;
  --bg-card2: #111;
  --border: rgba(57,255,20,0.18);
  --text: #b8b8b8;
  --text-bright: #ececec;
  --mono: 'Share Tech Mono', monospace;
  --display: 'Bebas Neue', sans-serif;
  --body: 'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.025) 2px, rgba(0,0,0,0.025) 4px);
  pointer-events: none;
  z-index: 9999;
}
a { text-decoration: none; }
img { display: inline-block; }

.green { color: var(--green); text-shadow: 0 0 20px var(--green); }

/* ─────────────────────────────────────────
   NAV
───────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 56px;
  background: rgba(5,5,5,0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: padding 0.3s;
}
#navbar.scrolled { padding: 11px 56px; }

.nav-logo {
  font-family: var(--mono);
  font-size: 1.05rem;
  color: var(--green);
  border: 1.5px solid var(--green);
  padding: 4px 10px;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.nav-logo:hover { background: var(--green-glow); box-shadow: 0 0 14px var(--green); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--green);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--green); }
.nav-links a:hover::after { width: 100%; }

.nav-hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--green);
  font-size: 1.2rem;
  padding: 5px 10px;
  cursor: pointer;
}

/* ─────────────────────────────────────────
   HERO
───────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 40px 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(57,255,20,0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(57,255,20,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6), transparent 70%);
}

.hero-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--green);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 18px;
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}

.hero-name {
  font-family: var(--display);
  font-size: clamp(4.5rem, 14vw, 10rem);
  color: var(--text-bright);
  letter-spacing: 0.04em;
  line-height: 0.92;
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}

.hero-sub {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
  letter-spacing: 0.18em;
  margin-top: 18px;
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}

.hero-links {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

.hero-link {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 6px 14px;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}
.hero-link:hover { border-color: var(--green); color: var(--green); }

.hero-cta {
  margin-top: 22px;
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--green);
  color: #000;
  padding: 10px 28px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 700;
  transition: all 0.2s;
  opacity: 0;
  animation: fadeUp 0.8s 1s forwards;
}
.hero-cta:hover { box-shadow: 0 0 24px var(--green); transform: translateY(-1px); }

.cursor-blink {
  display: inline-block;
  width: 2px; height: 1em;
  background: var(--green);
  vertical-align: text-bottom;
  margin-left: 3px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ─────────────────────────────────────────
   SECTION SHARED
───────────────────────────────────────── */
section { padding: 90px 60px; }

.section-title {
  font-family: var(--display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  color: var(--text-bright);
  text-align: center;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.section-divider {
  width: 56px; height: 2px;
  background: var(--green);
  margin: 0 auto 56px;
  box-shadow: 0 0 10px var(--green);
}

/* ─────────────────────────────────────────
   ABOUT
───────────────────────────────────────── */
#about {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.about-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  gap: 50px;
  align-items: flex-start;
}

.about-photo {
  flex-shrink: 0;
}

.photo-placeholder {
  width: 220px;
  height: 270px;
  background: #0a0a0a;
  border: 1px dashed rgba(57,255,20,0.3);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}
/* Image fills the box and sits ABOVE the ::before grid overlay */
.photo-placeholder img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  z-index: 2;
  display: block;
}
.photo-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(57,255,20,0.015) 12px, rgba(57,255,20,0.015) 13px);
}
.photo-placeholder i { color: rgba(57,255,20,0.2); font-size: 2.5rem; }
.photo-placeholder p { font-family: var(--mono); font-size: 0.6rem; color: rgba(57,255,20,0.3); letter-spacing: 0.18em; text-align: center; }

.about-text-block p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text);
}
.about-text-block strong { color: var(--green); }
.about-text-block p + p { margin-top: 14px; }

.about-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
  align-items: center;
}
.about-meta span, .about-meta a {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 6px;
}
.about-meta i { color: var(--green); }
.orcid-link { color: var(--text); transition: color 0.2s; }
.orcid-link:hover { color: var(--green); }

/* ─────────────────────────────────────────
   WHAT I DO
───────────────────────────────────────── */
#whatido { background: var(--bg); }

.whatido-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}

.whatido-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 38px;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.whatido-card:hover { border-color: rgba(57,255,20,0.4); box-shadow: 0 0 30px var(--green-glow); }

.whatido-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--green);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.whatido-heading {
  font-family: var(--display);
  font-size: 1.7rem;
  color: var(--text-bright);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.whatido-desc {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 26px;
}

.skills-group { margin-bottom: 20px; }
.skills-group-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: rgba(57,255,20,0.55);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.skills-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.skill-icon {
  width: 38px;
  height: 38px;
  background: var(--bg-card2);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  transition: all 0.2s;
  position: relative;
}
.skill-icon:hover { border-color: var(--green); transform: translateY(-2px); box-shadow: 0 0 10px var(--green-glow); }
.skill-icon img { width: 20px; height: 20px; object-fit: contain; }

/* Tooltip */
.skill-icon::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%);
  background: #1a1a1a;
  color: var(--green);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.07em;
  padding: 3px 8px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  border: 1px solid var(--border);
  transition: opacity 0.2s;
}
.skill-icon:hover::after { opacity: 1; }

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.stag {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--green);
  border: 1px solid rgba(57,255,20,0.22);
  padding: 3px 9px;
  background: rgba(57,255,20,0.04);
  letter-spacing: 0.06em;
}

/* ─────────────────────────────────────────
   EXPERIENCE
───────────────────────────────────────── */
#experience {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.timeline {
  max-width: 920px;
  margin: 0 auto;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(57,255,20,0.4), transparent);
}

.timeline-item {
  padding: 0 0 52px 44px;
  position: relative;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -5px; top: 8px;
  width: 11px; height: 11px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--green);
}

.exp-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  padding: 28px 30px;
  transition: border-color 0.3s;
}
.exp-card:hover { border-color: rgba(57,255,20,0.35); }

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 12px;
}

.exp-company-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.company-logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
  background: #fff;
  padding: 4px;
  border-radius: 4px;
  flex-shrink: 0;
}

.company-logo-fallback {
  width: 40px;
  height: 40px;
  background: var(--green);
  color: #000;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
}

.timeline-company {
  font-family: var(--display);
  font-size: 1.3rem;
  color: var(--text-bright);
  letter-spacing: 0.05em;
}

.exp-address {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: rgba(200,200,200,0.45);
  letter-spacing: 0.07em;
  margin-top: 2px;
}
.exp-address i { color: rgba(57,255,20,0.5); margin-right: 4px; }

.exp-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.timeline-date {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--green);
  letter-spacing: 0.1em;
  border: 1px solid rgba(57,255,20,0.25);
  padding: 3px 10px;
  background: rgba(57,255,20,0.04);
  white-space: nowrap;
}

.exp-type {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: rgba(200,200,200,0.35);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.timeline-role {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: rgba(57,255,20,0.7);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.timeline-role a {
  color: rgba(57,255,20,0.55);
  font-size: 0.65rem;
  margin-left: 8px;
  transition: color 0.2s;
  border-bottom: 1px dashed rgba(57,255,20,0.25);
  letter-spacing: 0.05em;
}
.timeline-role a:hover { color: var(--green); }

.timeline-bullets { list-style: none; }
.timeline-bullets li {
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--text);
  padding: 7px 0 7px 20px;
  position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.timeline-bullets li:last-child { border-bottom: none; }
.timeline-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.72rem;
  top: 9px;
}
.timeline-bullets li strong { color: var(--text-bright); }

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}
.timeline-tag {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--green);
  border: 1px solid rgba(57,255,20,0.2);
  padding: 2px 8px;
  background: rgba(57,255,20,0.03);
  letter-spacing: 0.08em;
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(440px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 28px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--green);
  transition: height 0.4s;
}
.project-card:hover { border-color: rgba(57,255,20,0.35); box-shadow: 0 8px 36px var(--green-glow); }
.project-card:hover::before { height: 100%; }

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 6px;
}
.project-name {
  font-family: var(--display);
  font-size: 1.4rem;
  color: var(--text-bright);
  letter-spacing: 0.05em;
}
.project-date {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--green);
  letter-spacing: 0.08em;
  opacity: 0.7;
}
.project-subtitle {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: rgba(57,255,20,0.55);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* SPECIOUS preview */
.project-preview {
  background: #0a0d12;
  border: 1px solid rgba(57,255,20,0.15);
  margin-bottom: 18px;
  overflow: hidden;
}
.preview-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #0f0f0f;
  border-bottom: 1px solid rgba(57,255,20,0.1);
  padding: 8px 12px;
}
.preview-dots { display: flex; gap: 5px; }
.preview-dots span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}
.preview-dots span:nth-child(1) { background: #ff5f56; }
.preview-dots span:nth-child(2) { background: #febc2e; }
.preview-dots span:nth-child(3) { background: #28c840; }
.preview-url {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: rgba(200,200,200,0.35);
  letter-spacing: 0.06em;
  flex: 1;
}
.preview-ext {
  font-size: 0.75rem;
  color: var(--green);
  opacity: 0.6;
  transition: opacity 0.2s;
}
.preview-ext:hover { opacity: 1; }

.preview-body { padding: 16px 18px; }
.preview-heading {
  font-family: var(--display);
  font-size: 0.95rem;
  color: var(--text-bright);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}
.preview-para {
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 12px;
}
.preview-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.preview-badges span {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--green);
  background: rgba(57,255,20,0.05);
  border: 1px solid rgba(57,255,20,0.18);
  padding: 2px 8px;
  letter-spacing: 0.06em;
}

.project-desc-list { list-style: none; margin-bottom: 16px; }
.project-desc-list li {
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--text);
  padding: 5px 0 5px 16px;
  position: relative;
}
.project-desc-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.7rem;
}
.project-desc-list li strong { color: var(--text-bright); }

.project-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.project-link {
  font-family: var(--mono);
  font-size: 0.63rem;
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 4px 12px;
  letter-spacing: 0.08em;
  transition: all 0.2s;
}
.project-link:hover { border-color: var(--green); color: var(--green); }

/* GitHub embed */
.github-embed {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #0d1117;
  border: 1px solid rgba(57,255,20,0.12);
  padding: 14px 16px;
  transition: border-color 0.2s;
  margin-top: 6px;
}
.github-embed:hover { border-color: var(--green); }
.gh-icon { flex-shrink: 0; }
.gh-info { flex: 1; min-width: 0; }
.gh-name {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.04em;
}
.gh-desc {
  font-size: 0.72rem;
  color: var(--text);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.gh-stats {
  display: flex;
  gap: 12px;
  margin-top: 6px;
}
.gh-stat {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: rgba(255,255,255,0.35);
  display: flex;
  align-items: center;
  gap: 4px;
}
.gh-stat i { color: var(--green); font-size: 0.58rem; }
.gh-ext-icon { color: rgba(57,255,20,0.35); font-size: 0.7rem; flex-shrink: 0; }

.section-more {
  text-align: center;
  margin-top: 40px;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}
.more-link {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.15em;
  border: 1px solid rgba(57,255,20,0.25);
  padding: 10px 24px;
  text-transform: uppercase;
  transition: all 0.2s;
}
.more-link:hover { background: rgba(57,255,20,0.06); box-shadow: 0 0 16px var(--green-glow); }

/* ─────────────────────────────────────────
   PUBLICATIONS
───────────────────────────────────────── */
#publications {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.pub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.pub-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
}
.pub-card:hover { border-color: rgba(57,255,20,0.35); box-shadow: 0 6px 28px var(--green-glow); }

.pub-image-placeholder {
  width: 100%; height: 170px;
  background: #080808;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  overflow: hidden;
}
.pub-image-placeholder img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}
.pub-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent, transparent 18px, rgba(57,255,20,0.015) 18px, rgba(57,255,20,0.015) 19px);
}
.pub-icon { color: rgba(57,255,20,0.18); font-size: 2.2rem; }
.pub-ph-text { font-family: var(--mono); font-size: 0.6rem; color: rgba(57,255,20,0.25); letter-spacing: 0.18em; text-transform: uppercase; }

.pub-body { padding: 20px 22px; }
.pub-venue-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; flex-wrap: wrap; gap: 6px; }
.pub-venue { font-family: var(--mono); font-size: 0.62rem; color: var(--green); letter-spacing: 0.14em; text-transform: uppercase; }
.pub-status {
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  padding: 2px 8px;
  border: 1px solid;
}
.pub-status.published { color: var(--green); border-color: rgba(57,255,20,0.3); background: rgba(57,255,20,0.05); }
.pub-status.under-review { color: #ffa500; border-color: rgba(255,165,0,0.3); background: rgba(255,165,0,0.05); }

.pub-title { font-size: 0.9rem; font-weight: 600; color: var(--text-bright); line-height: 1.5; margin-bottom: 6px; }
.pub-authors { font-family: var(--mono); font-size: 0.64rem; color: rgba(200,200,200,0.45); letter-spacing: 0.04em; margin-bottom: 10px; }
.pub-desc { font-size: 0.81rem; line-height: 1.65; color: var(--text); margin-bottom: 14px; }
.pub-link {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: rgba(57,255,20,0.65);
  letter-spacing: 0.08em;
  margin-right: 10px;
  transition: color 0.2s;
}
.pub-link:hover { color: var(--green); }

/* ─────────────────────────────────────────
   CERTIFICATIONS
───────────────────────────────────────── */
#certifications { background: var(--bg); }

.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 18px;
  max-width: 1100px;
  margin: 0 auto;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
}
.cert-card:hover { border-color: rgba(57,255,20,0.4); transform: translateY(-4px); box-shadow: 0 10px 28px var(--green-glow); }

.cert-image-placeholder {
  width: 100%; height: 130px;
  background: #080808;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.cert-image-placeholder img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}
.cert-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(57,255,20,0.015) 12px, rgba(57,255,20,0.015) 13px);
}
.cert-icon { color: rgba(57,255,20,0.18); font-size: 1.8rem; }
.cert-ph-text { font-family: var(--mono); font-size: 0.55rem; color: rgba(57,255,20,0.22); letter-spacing: 0.15em; text-transform: uppercase; }

.cert-body { padding: 14px 16px; }
.cert-name { font-size: 0.84rem; font-weight: 600; color: var(--text-bright); margin-bottom: 4px; line-height: 1.4; }
.cert-issuer { font-family: var(--mono); font-size: 0.62rem; color: var(--green); letter-spacing: 0.08em; margin-bottom: 4px; }
.cert-detail { font-size: 0.72rem; color: rgba(200,200,200,0.45); margin-bottom: 8px; line-height: 1.4; }
.cert-view {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: rgba(57,255,20,0.55);
  letter-spacing: 0.07em;
  transition: color 0.2s;
}
.cert-view:hover { color: var(--green); }

/* ─────────────────────────────────────────
   BLOGS
───────────────────────────────────────── */
#blogs {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.blogs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 22px;
  max-width: 1100px;
  margin: 0 auto;
}

.blog-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.blog-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}
.blog-card:hover { border-color: rgba(57,255,20,0.35); box-shadow: 0 6px 26px var(--green-glow); }
.blog-card:hover::after { transform: scaleX(1); }

.blog-card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.blog-date { font-family: var(--mono); font-size: 0.62rem; color: rgba(200,200,200,0.35); letter-spacing: 0.1em; }
.blog-title { font-size: 0.95rem; font-weight: 600; color: var(--text-bright); line-height: 1.45; margin-bottom: 10px; }
.blog-desc { font-size: 0.82rem; line-height: 1.65; color: var(--text); flex: 1; margin-bottom: 16px; }
.blog-arrow {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--green);
  letter-spacing: 0.1em;
  transition: letter-spacing 0.2s;
}
.blog-card:hover .blog-arrow { letter-spacing: 0.2em; }

/* ─────────────────────────────────────────
   EDUCATION
───────────────────────────────────────── */
#education {
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  max-width: 900px;
  margin: 0 auto;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 26px;
  transition: border-color 0.3s;
}
.edu-card:hover { border-color: rgba(57,255,20,0.35); }

.edu-degree { font-family: var(--display); font-size: 1.1rem; color: var(--text-bright); letter-spacing: 0.05em; margin-bottom: 5px; }
.edu-school { font-size: 0.84rem; color: var(--text); margin-bottom: 14px; line-height: 1.45; }
.edu-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; }
.edu-date { font-family: var(--mono); font-size: 0.64rem; color: var(--green); letter-spacing: 0.1em; }
.edu-note { font-family: var(--mono); font-size: 0.6rem; color: rgba(57,255,20,0.6); border: 1px solid rgba(57,255,20,0.2); padding: 2px 8px; }

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 80px 60px;
  text-align: center;
}

.footer-headline {
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.8rem);
  color: var(--text-bright);
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.footer-sub { font-family: var(--mono); font-size: 0.78rem; color: var(--text); letter-spacing: 0.2em; margin-bottom: 36px; }

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.footer-link {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text);
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--green); }

.footer-copyright { font-family: var(--mono); font-size: 0.6rem; color: rgba(200,200,200,0.18); letter-spacing: 0.12em; }

/* ─────────────────────────────────────────
   ANIMATIONS
───────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.65s, transform 0.65s;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ─────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────── */
@media (max-width: 960px) {
  #navbar { padding: 14px 24px; }
  section { padding: 70px 24px; }
  .whatido-grid, .edu-grid { grid-template-columns: 1fr; }
  .projects-grid, .pub-grid { grid-template-columns: 1fr; }
  footer { padding: 60px 24px; }
  .about-inner { flex-direction: column; gap: 28px; }
  .photo-placeholder { width: 100%; height: 220px; }
}

@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(5,5,5,0.97); padding: 20px 24px; border-bottom: 1px solid var(--border); gap: 16px; }
  .nav-hamburger { display: block; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .blogs-grid { grid-template-columns: 1fr; }
}

/* ─────────────────────────────────────────
   DSA & CP — CODEFORCES SECTION
───────────────────────────────────────── */
.cf-wrapper {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Profile card */
.cf-profile-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 28px 32px;
  display: flex;
  gap: 32px;
  align-items: center;
}
.cf-avatar-wrap {
  flex-shrink: 0;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--green);
  position: relative;
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cf-avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  z-index: 2;
}
.cf-avatar-fallback {
  color: rgba(57,255,20,0.3);
  font-size: 2rem;
  z-index: 1;
}
.cf-profile-info { flex: 1; }
.cf-handle {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--green);
  margin-bottom: 6px;
  letter-spacing: 0.06em;
}
.cf-rank-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 10px;
  border: 1px solid rgba(57,255,20,0.4);
  color: var(--green);
  background: rgba(57,255,20,0.06);
  display: inline-block;
  margin-bottom: 16px;
}
.cf-stats-row {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.cf-stat { display: flex; flex-direction: column; gap: 2px; }
.cf-stat-val {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-bright);
}
.cf-stat-lbl {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: rgba(200,200,200,0.4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.cf-profile-link {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--green);
  letter-spacing: 0.12em;
  text-decoration: none;
  border-bottom: 1px solid rgba(57,255,20,0.3);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}
.cf-profile-link:hover { border-color: var(--green); }

/* Heatmap */
.cf-heatmap-wrap, .cf-chart-wrap {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 24px 28px;
}
.cf-section-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--green);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.cf-heatmap {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-bottom: 12px;
}
.cf-loading {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(57,255,20,0.4);
  letter-spacing: 0.1em;
  padding: 20px 0;
}
.cf-week {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.cf-cell {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: rgba(57,255,20,0.06);
  cursor: default;
  transition: transform 0.1s;
  position: relative;
}
.cf-cell:hover { transform: scale(1.3); }
.cf-cell[title]:hover::after {
  content: attr(title);
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #111;
  border: 1px solid var(--border);
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 0.55rem;
  white-space: nowrap;
  padding: 3px 7px;
  z-index: 10;
  pointer-events: none;
}
.cf-heatmap-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: flex-end;
  margin-top: 8px;
}
.cf-leg-label {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: rgba(200,200,200,0.35);
  letter-spacing: 0.08em;
}
.cf-leg-cell {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  display: inline-block;
}

/* Rating chart */
#cf-rating-chart { width: 100%; display: block; }
.cf-no-data {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: rgba(57,255,20,0.35);
  letter-spacing: 0.1em;
  text-align: center;
  padding: 24px 0;
}

@media (max-width: 680px) {
  .cf-profile-card { flex-direction: column; align-items: flex-start; }
  .cf-heatmap { overflow-x: auto; flex-wrap: nowrap; }
}
/* ─────────────────────────────────────────
   CUSTOM CURSOR (GPU-accelerated)
───────────────────────────────────────── */

body { cursor: none; }

.cursor {
  position: fixed;
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px var(--green);
  transition: width .2s, height .2s;
}

.cursor-trail {
  position: fixed;
  width: 28px; height: 28px;
  border: 1px solid rgba(57,255,20,0.35);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9997;
  transform: translate(-50%, -50%);
}

/* Nav contact + home links */
.nav-contact {
  background: rgba(57,255,20,0.08);
  border: 1px solid rgba(57,255,20,0.25);
  border-radius: 4px;
  padding: 4px 10px !important;
  color: var(--green) !important;
  transition: background .25s, border-color .25s !important;
}

.nav-contact:hover {
  background: rgba(57,255,20,0.18) !important;
  border-color: var(--green) !important;
}

.nav-home {
  opacity: .45;
  font-size: .75em;
  margin-left: 4px;
}

.reach {
  color: var(--green);
  text-decoration: none;
  transition: color .25s;
}

.reach:hover { color: var(--white); }