/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg:         #18181b;
  --bg-card:    #1f1f23;
  --bg-alt:     #141417;
  --bg-hover:   #27272a;
  --border:     #3f3f46;
  --border-dim: #2a2a2e;
  --accent:     #f97316;
  --accent-dim: #c2570d;
  --accent-glow:rgba(249,115,22,0.15);
  --web3:       #a78bfa;
  --web3-bg:    rgba(167,139,250,0.12);
  --text:       #fafafa;
  --text-muted: #a1a1aa;
  --text-dim:   #71717a;
  --font:       'Inter', sans-serif;
  --mono:       'JetBrains Mono', monospace;
  --radius:     8px;
  --radius-lg:  16px;
  --nav-h:      64px;
  --transition: 0.2s ease;
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Utilities ─────────────────────────────────────────── */
.mono        { font-family: var(--mono); }
.accent      { color: var(--accent); }
.muted       { color: var(--text-muted); }
.hidden      { display: none !important; }
.container   { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 680px; margin: 0 auto; padding: 0 24px; }

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover { background: var(--accent-dim); opacity: 1; }
.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-secondary:hover { background: var(--accent-glow); opacity: 1; }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

/* ── Tags & Badges ─────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-family: var(--mono);
  background: var(--bg-hover);
  color: var(--text-muted);
  border: 1px solid var(--border-dim);
  transition: all var(--transition);
}
.tag-sm  { padding: 2px 8px; font-size: 0.72rem; }
.tag-web3 { background: var(--web3-bg); color: var(--web3); border-color: rgba(167,139,250,0.25); }
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
}
.badge-web3  { background: var(--web3-bg);              color: var(--web3); }
.badge-infra { background: rgba(59,130,246,0.12);       color: #60a5fa; }
.badge-cert  { background: rgba(234,179,8,0.12);        color: #facc15; }
.badge-beta  { background: rgba(249,115,22,0.12);       color: var(--accent); }
.badge-sm    { font-size: 0.68rem; padding: 1px 6px; }

/* ── Nav ───────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(24,24,27,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dim);
  transition: background var(--transition);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.nav-logo:hover { opacity: 1; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-switcher { display: flex; align-items: center; gap: 4px; }
.lang-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 2px 4px;
  transition: color var(--transition);
}
.lang-btn:hover, .lang-btn.active { color: var(--accent); }
.lang-sep { color: var(--border); font-size: 0.75rem; }
.nav-burger {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 4px;
}
.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-dim);
  padding: 16px 24px;
  gap: 16px;
}
.nav-mobile a {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
}
.nav-mobile.open { display: flex; }

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-h) + 40px) 24px 60px;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(249,115,22,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 30% 60%, rgba(167,139,250,0.04) 0%, transparent 60%);
  pointer-events: none;
}
.hero-inner {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 64px;
  max-width: 1000px;
  width: 100%;
}
.hero-avatar-wrap {
  position: relative;
  flex-shrink: 0;
  width: 260px;
}
.hero-avatar {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  object-position: center top;
  border: 2px solid var(--border);
  position: relative;
  z-index: 1;
  display: block;
}
.hero-avatar-glow {
  position: absolute;
  inset: -12px;
  border-radius: 24px;
  background: var(--accent-glow);
  filter: blur(20px);
  z-index: 0;
}
.hero-text { flex: 1; }
.hero-greeting {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.hero-name {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 8px;
}
.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.hero-tagline {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 24px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-open-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: #4ade80;
  background: rgba(74,222,128,0.08);
  border: 1px solid rgba(74,222,128,0.25);
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 16px;
}
.hero-scroll {
  position: absolute;
  bottom: 28px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font-size: 1rem;
  text-decoration: none;
  animation: bounce 2s infinite;
  transition: background var(--transition), opacity var(--transition);
}
.hero-scroll:hover {
  background: var(--accent-glow);
  opacity: 1;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

/* ── Sections ──────────────────────────────────────────── */
.section     { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-title {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 700;
  margin-bottom: 48px;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.section-sub {
  color: var(--text-muted);
  margin-top: -32px;
  margin-bottom: 48px;
  font-size: 0.95rem;
}

/* ── About ─────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}
.about-bio p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1rem;
}
.about-personal { font-size: 0.95rem !important; }
.about-cert {
  margin-top: 24px;
}
.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(234,179,8,0.08);
  border: 1px solid rgba(234,179,8,0.2);
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: #fbbf24;
}
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: border-color var(--transition);
}
.stat-card:hover { border-color: var(--accent); }
.stat-num {
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ── Skills ────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition);
}
.skill-group:hover { border-color: var(--border); }
.skill-group-web3 { border-color: rgba(167,139,250,0.2); }
.skill-group-web3:hover { border-color: var(--web3); }
.skill-group-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── Timeline ──────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 28px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border-dim));
}
.timeline-item {
  position: relative;
  margin-bottom: 52px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}
.timeline-marker-sm {
  width: 10px;
  height: 10px;
  left: -22px;
  top: 8px;
  background: var(--border);
  box-shadow: 0 0 0 2px var(--border);
}
.timeline-body {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 20px 24px;
  transition: border-color var(--transition);
}
.timeline-body:hover { border-color: var(--border); }
.timeline-item-early .timeline-body {
  background: transparent;
  border-color: var(--border-dim);
  opacity: 0.7;
}
.timeline-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.timeline-company {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 2px;
}
.timeline-role {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.timeline-loc {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 2px;
}
.timeline-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 4px;
}
.timeline-context {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-style: italic;
}
.timeline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.timeline-list li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
}
.timeline-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.7rem;
  top: 4px;
}
.timeline-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

/* ── Education ─────────────────────────────────────────── */
.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.edu-cert-card {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(234,179,8,0.06);
  border: 1px solid rgba(234,179,8,0.25);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition);
}
.edu-cert-card:hover { border-color: rgba(234,179,8,0.5); }
.edu-cert-icon { font-size: 2rem; flex-shrink: 0; }
.edu-cert-body { flex: 1; }
.edu-cert-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fbbf24;
  margin-bottom: 2px;
}
.edu-cert-issuer {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.edu-cert-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.edu-cert-verify {
  flex-shrink: 0;
  font-size: 0.8rem;
  padding: 6px 14px;
  border: 1px solid rgba(234,179,8,0.3);
  border-radius: var(--radius);
  color: #fbbf24;
  transition: all var(--transition);
}
.edu-cert-verify:hover { background: rgba(234,179,8,0.1); opacity: 1; }
.edu-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition);
}
.edu-card:hover { border-color: var(--border); }
.edu-card-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 2px; }
.edu-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.edu-card-inst {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.edu-card-year {
  font-size: 0.75rem;
  color: var(--text-dim);
}

@media (max-width: 600px) {
  .education-grid { grid-template-columns: 1fr; }
  .edu-cert-card  { flex-wrap: wrap; }
}

/* ── Projects ──────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}
.project-name {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}
.project-subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 2px;
}
.project-links {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.project-links a {
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: color var(--transition);
}
.project-links a:hover { color: var(--accent); opacity: 1; }
.project-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
}
.project-stats {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.projects-more-wrap { text-align: center; margin-top: 8px; }
.projects-table-wrap {
  margin-top: 24px;
  overflow-x: auto;
}
.projects-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.projects-table th {
  text-align: left;
  padding: 10px 16px;
  color: var(--text-dim);
  font-weight: 500;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border-dim);
}
.projects-table td {
  padding: 12px 16px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-dim);
  vertical-align: top;
}
.projects-table tr:hover td { background: var(--bg-hover); }
.projects-table td:first-child { color: var(--text); font-weight: 500; }

/* ── Services ──────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
}
.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.service-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 12px;
}
.service-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.service-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.pricing {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}
.pricing-rate { flex-shrink: 0; text-align: center; }
.pricing-amount {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.pricing-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.pricing-formats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  flex: 1;
}
.pricing-format { flex: 1; min-width: 160px; }
.pricing-format-preferred {
  border-left: 2px solid var(--accent);
  padding-left: 16px;
}
.pricing-format h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.pricing-format p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ── Contact ───────────────────────────────────────────── */
.contact-sub {
  color: var(--text-muted);
  margin-bottom: 40px;
  font-size: 1rem;
}
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color var(--transition), transform var(--transition);
}
.contact-link:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  opacity: 1;
}
.contact-icon { font-size: 1.1rem; }
.contact-location {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 24px;
}

/* ── Footer ────────────────────────────────────────────── */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border-dim);
}
.footer-text {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .hero-inner { flex-direction: column; gap: 40px; text-align: center; }
  .hero-badges { justify-content: center; }
  .hero-cta    { justify-content: center; }
  .hero-tagline { margin: 0 auto 24px; }
  .about-grid  { grid-template-columns: 1fr; gap: 40px; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .pricing     { flex-direction: column; gap: 32px; align-items: flex-start; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .hero-avatar-wrap { width: 120px; }
  .hero-avatar { height: 160px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .pricing { padding: 24px; }
  .timeline { padding-left: 20px; }
  .timeline-meta { flex-direction: column; }
}