/* ===== RESET ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ===== DESIGN TOKENS ===== */
:root {
  --bg:        #08080a;
  --bg-1:      #0f0f12;
  --bg-2:      #13131a;
  --surface:   rgba(255,255,255,0.025);
  --border:    rgba(255,255,255,0.08);
  --border-h:  rgba(129,140,248,0.35);

  --accent:    #818cf8;
  --accent-d:  rgba(129,140,248,0.12);
  --accent-g:  rgba(129,140,248,0.06);

  --t1: #f8fafc;
  --t2: #94a3b8;
  --t3: #475569;
  --t4: #1e293b;

  --fh: 'Space Grotesk', sans-serif;
  --fb: 'Inter', sans-serif;
  --fm: 'JetBrains Mono', monospace;

  --r:   12px;
  --rl:  20px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  font-family: var(--fb);
  background: var(--bg);
  color: var(--t1);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(129,140,248,0.3); }
::selection { background: rgba(129,140,248,0.2); color: var(--t1); }

/* ===== CONTAINER ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== NAVBAR ===== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: all 0.3s var(--ease);
}

#navbar.scrolled {
  background: rgba(8,8,10,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 13px 0;
}

.nav-container {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center;
}

.nav-logo {
  font-family: var(--fm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--t2);
}

.accent { color: var(--accent); }

.nav-links {
  display: flex; list-style: none;
  gap: 36px; align-items: center;
}

.nav-links a {
  font-size: 0.875rem; color: var(--t3); font-weight: 500;
  transition: color 0.2s; letter-spacing: 0.01em;
}

.nav-links a:hover { color: var(--t1); }

.nav-cta {
  padding: 7px 18px !important;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--t2) !important;
  transition: all 0.2s !important;
}

.nav-cta:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  background: var(--accent-d) !important;
}

.nav-toggle {
  display: none; background: none; border: none;
  cursor: pointer; padding: 4px;
  flex-direction: column; gap: 5px;
}

.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--t2); border-radius: 2px;
  transition: all 0.3s;
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 4.5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -4.5px); }

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding-top: 80px;
}

.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(129,140,248,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(129,140,248,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 40%, transparent 100%);
}

.hero-container {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center; width: 100%;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem; color: var(--t3);
  font-family: var(--fm);
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #22c55e;
  flex-shrink: 0;
  animation: pulse-dot 2.2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.5); }
  50%       { box-shadow: 0 0 0 5px rgba(34,197,94,0); }
}

.hero-name {
  font-family: var(--fh);
  font-size: clamp(2.6rem, 4.5vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 20px;
  color: var(--t1);
}

.hero-tagline {
  font-size: 1.05rem; color: var(--t2);
  line-height: 1.7; max-width: 460px;
  margin-bottom: 36px;
}

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 36px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-num {
  display: block;
  font-family: var(--fh);
  font-size: 1.45rem; font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px; line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: 0.7rem; color: var(--t3);
  font-family: var(--fm);
  margin-top: 4px; line-height: 1.4;
}

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

.cta-primary {
  padding: 12px 28px;
  background: var(--accent);
  color: #000; font-weight: 600; font-size: 0.9rem;
  border-radius: 10px;
  transition: all 0.2s var(--ease);
  font-family: var(--fh);
}

.cta-primary:hover {
  background: #a5b4fc;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(129,140,248,0.35);
  color: #000;
}

.cta-secondary {
  padding: 12px 22px;
  border: 1px solid var(--border);
  color: var(--t2); font-size: 0.875rem; font-weight: 500;
  border-radius: 10px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: all 0.2s;
}

.cta-secondary:hover {
  border-color: var(--border-h);
  color: var(--accent);
  background: var(--accent-d);
  transform: translateY(-2px);
}

/* ===== HEATMAP ===== */
.hero-right { position: relative; }

.hero-right::before {
  content: '';
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 130%; height: 130%;
  background: radial-gradient(ellipse at center, rgba(129,140,248,0.1) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

.heatmap-container { position: relative; z-index: 1; }

.heatmap-label {
  font-family: var(--fm);
  font-size: 0.7rem; color: var(--t3);
  margin-bottom: 12px; letter-spacing: 0.05em;
}

.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 3px;
}

.heatmap-cell {
  aspect-ratio: 1; border-radius: 3px;
  transition: transform 0.15s, opacity 0.15s;
  cursor: default;
}

.heatmap-cell:hover {
  transform: scale(1.25) !important;
  opacity: 1 !important;
}

.heatmap-caption {
  font-family: var(--fm);
  font-size: 0.67rem; color: var(--t4);
  margin-top: 12px; line-height: 1.5;
}

/* ===== SECTION SCAFFOLDING ===== */
.section-dark  { padding: 100px 0; background: var(--bg); }
.section-light { padding: 100px 0; background: var(--bg-1); }

.section-label {
  display: block;
  font-family: var(--fm);
  font-size: 0.72rem; color: var(--accent);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 12px;
}

.section-heading {
  font-family: var(--fh);
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-weight: 700; letter-spacing: -1.5px;
  line-height: 1.1; margin-bottom: 16px; color: var(--t1);
}

.section-sub {
  font-size: 1rem; color: var(--t2);
  max-width: 580px; line-height: 1.75;
  margin-bottom: 56px;
}

/* ===== DISSERTATION ===== */
#dissertation {
  position: relative;
  background: var(--bg-1);
}

#dissertation::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(129,140,248,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(129,140,248,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
}

#dissertation .container { position: relative; }

.dissertation-grid {
  display: grid; grid-template-columns: 1.2fr 1fr;
  gap: 48px; align-items: start;
}

.shap-chart {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--rl);
  padding: 32px;
}

.shap-title {
  font-family: var(--fh);
  font-size: 1.1rem; font-weight: 600;
  margin-bottom: 4px; color: var(--t1);
}

.shap-subtitle {
  font-size: 0.78rem; color: var(--t3);
  font-family: var(--fm); margin-bottom: 28px;
}

.shap-row {
  display: grid; grid-template-columns: 130px 1fr 52px;
  align-items: center; gap: 12px; margin-bottom: 14px;
}

.shap-feature {
  font-size: 0.78rem; color: var(--t2);
  font-family: var(--fm);
}

.shap-bar-wrap {
  height: 7px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px; overflow: hidden;
}

.shap-bar-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent), #a5b4fc);
  border-radius: 4px;
  transition: width 1.1s var(--ease);
}

.shap-bar-fill.animated { width: var(--shap-w); }

.shap-val {
  font-size: 0.73rem; color: var(--accent);
  font-family: var(--fm); text-align: right;
}

.dissertation-metrics {
  display: flex; flex-direction: column; gap: 14px;
}

.metric-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 22px;
  transition: border-color 0.2s;
}

.metric-card:hover { border-color: var(--border-h); }

.metric-num {
  font-family: var(--fh);
  font-size: 1.75rem; font-weight: 700;
  color: var(--accent); line-height: 1;
  margin-bottom: 3px; letter-spacing: -1px;
}

.metric-name {
  font-size: 0.85rem; font-weight: 600;
  color: var(--t1); margin-bottom: 2px;
}

.metric-detail {
  font-size: 0.72rem; color: var(--t3);
  font-family: var(--fm);
}

.tech-used {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 22px;
}

.tech-label {
  font-size: 0.7rem; color: var(--t3);
  font-family: var(--fm); text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: 12px;
}

.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tech-tags span {
  padding: 4px 10px;
  background: var(--accent-d);
  border: 1px solid rgba(129,140,248,0.2);
  border-radius: 6px;
  font-size: 0.73rem; color: var(--accent);
  font-family: var(--fm);
}

/* ===== PROJECTS ===== */
.projects-list { display: flex; flex-direction: column; gap: 16px; }

.project-item {
  border: 1px solid var(--border);
  border-radius: var(--rl);
  padding: 36px;
  background: var(--surface);
  transition: all 0.3s var(--ease);
  position: relative; overflow: hidden;
}

.project-item::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0; transition: opacity 0.3s;
}

.project-item:hover {
  border-color: var(--border-h);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.45);
}

.project-item:hover::before { opacity: 1; }

.project-meta {
  display: flex; gap: 12px; align-items: center;
  margin-bottom: 16px; flex-wrap: wrap;
}

.project-year {
  font-family: var(--fm); font-size: 0.73rem; color: var(--t3);
}

.project-tag {
  padding: 3px 10px;
  border: 1px solid rgba(129,140,248,0.2);
  border-radius: 100px;
  font-size: 0.7rem; color: var(--accent);
  font-family: var(--fm);
}

.project-body h3 {
  font-family: var(--fh);
  font-size: 1.35rem; font-weight: 600;
  margin-bottom: 12px; letter-spacing: -0.5px;
  color: var(--t1);
}

.project-body p {
  color: var(--t2); font-size: 0.93rem;
  line-height: 1.75; max-width: 720px;
  margin-bottom: 24px;
}

.project-tech {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 20px; padding-top: 18px;
  border-top: 1px solid var(--border);
}

.project-tech span {
  padding: 4px 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.72rem; color: var(--t3);
  font-family: var(--fm);
}

.project-pipeline, .pipeline-branch {
  display: flex; align-items: center;
  flex-wrap: wrap; gap: 4px;
  margin-bottom: 6px;
}

.pipeline-node {
  padding: 5px 11px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 0.73rem; color: var(--t2);
  font-family: var(--fm);
  background: rgba(255,255,255,0.02);
  white-space: nowrap;
}

.pipeline-node.accent-node {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-d);
}

.pipeline-arrow {
  font-size: 0.78rem; color: var(--t4);
  padding: 0 1px; flex-shrink: 0;
}

.project-results {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
}

.result-num {
  display: block;
  font-family: var(--fh);
  font-size: 1.45rem; font-weight: 700;
  color: var(--accent); line-height: 1.2;
}

.result-desc {
  display: block;
  font-size: 0.7rem; color: var(--t3);
  font-family: var(--fm); margin-top: 4px; line-height: 1.4;
}

/* Small project cards */
.projects-small-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.project-small {
  border: 1px solid var(--border);
  border-radius: var(--rl);
  padding: 24px; background: var(--surface);
  transition: all 0.3s var(--ease);
}

.project-small:hover {
  border-color: var(--border-h);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.4);
}

.project-small-header {
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 12px; flex-wrap: wrap;
}

.project-small h4 {
  font-family: var(--fh);
  font-size: 1rem; font-weight: 600;
  margin-bottom: 8px; letter-spacing: -0.3px; color: var(--t1);
}

.project-small p {
  font-size: 0.85rem; color: var(--t2);
  line-height: 1.65; margin-bottom: 16px;
}

/* ===== STACK ===== */
.stack-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.stack-group-label {
  font-family: var(--fm); font-size: 0.7rem;
  color: var(--t3); text-transform: uppercase;
  letter-spacing: 0.12em; margin-bottom: 16px;
}

.stack-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.stack-tag {
  padding: 6px 14px; border-radius: 8px;
  font-size: 0.78rem; font-family: var(--fm);
  border: 1px solid; cursor: default;
  transition: all 0.2s;
}

.stack-tag.tier-1 {
  background: var(--accent-d);
  border-color: rgba(129,140,248,0.25);
  color: var(--accent);
}

.stack-tag.tier-2 {
  background: rgba(255,255,255,0.02);
  border-color: var(--border);
  color: var(--t3);
}

.stack-tag:hover {
  border-color: var(--border-h) !important;
  color: var(--accent) !important;
  background: var(--accent-d) !important;
  transform: translateY(-1px);
}

/* ===== TIMELINE ===== */
.timeline {
  display: flex; flex-direction: column;
  position: relative; margin-bottom: 56px;
  max-width: 880px;
}

.timeline::before {
  content: '';
  position: absolute; left: 116px;
  top: 10px; bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), rgba(129,140,248,0.1), transparent);
}

.tl-item {
  display: grid; grid-template-columns: 120px 20px 1fr;
  gap: 20px; padding-bottom: 44px; align-items: start;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-left { padding-top: 4px; }

.tl-year {
  font-family: var(--fm); font-size: 0.7rem;
  color: var(--accent); margin-bottom: 4px; line-height: 1.3;
}

.tl-org {
  font-family: var(--fm); font-size: 0.66rem;
  color: var(--t4); line-height: 1.4;
}

.tl-dot {
  width: 10px; height: 10px;
  border-radius: 50%; background: var(--accent);
  margin-top: 7px; flex-shrink: 0;
  box-shadow: 0 0 12px rgba(129,140,248,0.6);
}

.tl-badge {
  display: inline-block; padding: 2px 10px;
  border: 1px solid var(--border); border-radius: 100px;
  font-size: 0.66rem; color: var(--t3);
  font-family: var(--fm); margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.tl-right h4 {
  font-family: var(--fh); font-size: 1rem;
  font-weight: 600; margin-bottom: 8px;
  letter-spacing: -0.3px; color: var(--t1);
}

.tl-right p { font-size: 0.88rem; color: var(--t2); line-height: 1.7; }

.certs-row {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cert-item {
  border: 1px solid var(--border); border-radius: var(--r);
  padding: 20px; transition: border-color 0.2s;
}

.cert-item:hover { border-color: var(--border-h); }

.cert-org {
  font-size: 0.7rem; color: var(--accent);
  font-family: var(--fm); margin-bottom: 6px;
}

.cert-name {
  font-size: 0.88rem; font-weight: 600;
  color: var(--t1); margin-bottom: 6px;
}

.cert-date {
  font-size: 0.7rem; color: var(--t3);
  font-family: var(--fm);
}

/* ===== CONTACT ===== */
.contact-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: start;
}

.contact-intro {
  font-size: 1rem; color: var(--t2);
  line-height: 1.75; margin-bottom: 28px;
  max-width: 440px;
}

.contact-links-row { display: flex; flex-direction: column; gap: 10px; }

.contact-link-item {
  display: flex; align-items: center; gap: 16px;
  padding: 15px 18px;
  border: 1px solid var(--border); border-radius: var(--r);
  color: var(--t1); transition: all 0.2s;
}

.contact-link-item:hover {
  border-color: var(--border-h);
  background: var(--accent-d);
  transform: translateX(4px);
}

.contact-link-icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  background: rgba(129,140,248,0.1);
  border: 1px solid rgba(129,140,248,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); flex-shrink: 0;
}

.contact-link-title {
  font-size: 0.8rem; font-weight: 600;
  color: var(--t1); margin-bottom: 2px;
}

.contact-link-val {
  font-size: 0.78rem; color: var(--t3);
  font-family: var(--fm);
}

/* Visa card */
.visa-card-inner {
  background: linear-gradient(135deg, #0d0f1e 0%, #17124a 100%);
  border: 1px solid rgba(129,140,248,0.3);
  border-radius: var(--rl);
  padding: 32px;
  position: relative; overflow: hidden;
}

.visa-card-inner::before {
  content: '';
  position: absolute; top: -50px; right: -50px;
  width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(129,140,248,0.18), transparent 70%);
  pointer-events: none;
}

.visa-card-inner::after {
  content: '';
  position: absolute; bottom: -30px; left: -30px;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(165,180,252,0.08), transparent 70%);
  pointer-events: none;
}

.visa-label {
  font-family: var(--fm); font-size: 0.66rem;
  color: rgba(129,140,248,0.6);
  text-transform: uppercase; letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.visa-main {
  font-family: var(--fh);
  font-size: 1.55rem; font-weight: 700;
  color: var(--t1); line-height: 1.2;
  margin-bottom: 16px; letter-spacing: -0.5px;
}

.visa-date { color: var(--accent); display: block; }

.visa-detail {
  font-size: 0.85rem; color: var(--t2);
  line-height: 1.6; margin-bottom: 16px;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}

.visa-current {
  font-family: var(--fm); font-size: 0.7rem; color: var(--t4);
}

/* ===== FOOTER ===== */
#footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-container {
  max-width: 1100px; margin: 0 auto; padding: 0 24px;
  display: flex; justify-content: space-between;
  align-items: center; gap: 16px;
}

.footer-copy, .footer-tagline {
  font-size: 0.78rem; font-family: var(--fm);
}

.footer-copy { color: var(--t4); }
.footer-tagline { color: var(--t3); font-style: italic; }

.footer-links { display: flex; gap: 20px; }

.footer-links a {
  font-size: 0.78rem; color: var(--t4);
  font-family: var(--fm); transition: color 0.2s;
}

.footer-links a:hover { color: var(--accent); }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}

.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; gap: 56px; padding-top: 40px; }
  .hero-right { order: -1; max-width: 520px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .dissertation-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .timeline::before { display: none; }
  .tl-item { grid-template-columns: 100px 16px 1fr; gap: 14px; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 260px; height: 100vh;
    background: rgba(8,8,10,0.98);
    backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    flex-direction: column; justify-content: center;
    gap: 28px; padding: 40px; list-style: none;
    transition: right 0.3s var(--ease);
    z-index: 100;
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 1rem; color: var(--t2); }
  .nav-toggle { display: flex; z-index: 101; }

  .hero-name { font-size: 2.4rem; letter-spacing: -1.5px; }
  .hero-ctas { flex-direction: column; }
  .cta-primary, .cta-secondary { width: 100%; justify-content: center; }

  .section-dark, .section-light { padding: 72px 0; }

  .projects-small-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .certs-row { grid-template-columns: 1fr; }

  .tl-item { grid-template-columns: 1fr; gap: 6px; }
  .tl-dot { display: none; }
  .tl-left { margin-bottom: 4px; }

  .shap-row { grid-template-columns: 100px 1fr 44px; }
  .project-item { padding: 24px; }
  .project-body h3 { font-size: 1.15rem; }
  .project-results { gap: 10px; padding: 14px; }

  .footer-container { flex-direction: column; gap: 10px; text-align: center; }
  .footer-tagline { display: none; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2rem; letter-spacing: -1px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-num { font-size: 1.25rem; }
  .result-num { font-size: 1.2rem; }
  .projects-small-grid { grid-template-columns: 1fr; }
  .heatmap-grid { grid-template-columns: repeat(10, 1fr); }
}