/* ── RESET & VARIABLES ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #060910;
  --surface:   #0D1117;
  --surface2:  #161B22;
  --surface3:  #1C2333;
  --border:    #21262D;
  --border2:   #30363D;
  --text:      #F0F6FC;
  --muted:     #8B949E;
  --faint:     #3D444D;
  --blue:      #58A6FF;
  --blue2:     #1F6FEB;
  --cyan:      #39D353;
  --green:     #3FB950;
  --orange:    #F0883E;
  --red:       #FF7B72;
  --purple:    #BC8CFF;
  --gold:      #E3B341;
  --pink:      #FF6EB4;
  --radius:    10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow:    0 8px 32px rgba(0,0,0,.6);
  --shadow-blue: 0 0 30px rgba(88,166,255,.15);
  --transition: .25s ease;
  --max-w:     1100px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* Grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(88,166,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(88,166,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

a { color: var(--blue); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: .8; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

section { padding: 100px 0; position: relative; z-index: 1; }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text) 40%, var(--blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -.02em;
}

.section-subtitle {
  color: var(--muted);
  margin-bottom: 48px;
  font-size: .95rem;
}
.section-subtitle a { color: var(--blue); }

/* ── BUTTONS ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 26px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(88,166,255,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(88,166,255,.5);
  opacity: 1;
}

.btn-secondary {
  background: rgba(88,166,255,.08);
  color: var(--blue);
  border: 1px solid rgba(88,166,255,.3);
}
.btn-secondary:hover {
  background: rgba(88,166,255,.15);
  transform: translateY(-2px);
  opacity: 1;
}

/* ── TAGS ──────────────────────────────────────────────── */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 500;
  background: var(--surface3);
  border: 1px solid var(--border2);
  color: var(--muted);
  transition: all var(--transition);
}
.tag:hover { border-color: var(--blue); color: var(--blue); }

.tag-blue   { background: rgba(88,166,255,.1);  border-color: rgba(88,166,255,.25);  color: var(--blue);   }
.tag-green  { background: rgba(63,185,80,.1);   border-color: rgba(63,185,80,.25);   color: var(--green);  }
.tag-orange { background: rgba(240,136,62,.1);  border-color: rgba(240,136,62,.25);  color: var(--orange); }
.tag-red    { background: rgba(255,123,114,.1); border-color: rgba(255,123,114,.25); color: var(--red);    }
.tag-purple { background: rgba(188,140,255,.1); border-color: rgba(188,140,255,.25); color: var(--purple); }
.tag-cyan   { background: rgba(57,211,83,.1);   border-color: rgba(57,211,83,.25);   color: var(--cyan);   }

/* ── NAVBAR ────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(6,9,16,.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}
#navbar.scrolled { border-bottom-color: var(--border); }

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .05em;
}
.nav-logo .dot { color: var(--blue); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 2px;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-size: .85rem;
  font-weight: 500;
  padding: 7px 13px;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--surface2); opacity: 1; }

.nav-cta {
  background: linear-gradient(135deg, var(--blue), var(--blue2)) !important;
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: 0 2px 12px rgba(88,166,255,.3);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(88,166,255,.4) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── HERO ──────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 100px 24px 60px;
  position: relative;
  overflow: hidden;
}

/* Glowing orbs */
#hero::before, #hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(80px);
}
#hero::before {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(88,166,255,.12), transparent 70%);
  top: -100px; right: -100px;
}
#hero::after {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(63,185,80,.08), transparent 70%);
  bottom: 0; left: -100px;
}

.hero-container {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 72px;
  width: 100%;
}

/* Photo */
.hero-photo-wrap {
  position: relative;
  flex-shrink: 0;
}

.hero-photo {
  width: 230px; height: 230px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  position: relative;
  z-index: 2;
  display: block;
}

.hero-photo-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: conic-gradient(
    var(--blue) 0%,
    var(--purple) 25%,
    var(--green) 50%,
    var(--orange) 75%,
    var(--blue) 100%
  );
  z-index: 1;
  animation: spin 8s linear infinite;
}

.hero-photo-bg {
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: var(--bg);
  z-index: 1;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Status badge */
.hero-status {
  position: absolute;
  bottom: 12px; right: 0;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 20px;
  padding: 4px 10px;
  font-size: .72rem;
  font-weight: 600;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 5px;
  z-index: 3;
  white-space: nowrap;
}
.hero-status::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse-green 2s ease infinite;
}
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 0 0 rgba(63,185,80,.4); }
  50%       { box-shadow: 0 0 0 5px rgba(63,185,80,0); }
}

.hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  font-size: .85rem;
  color: var(--blue);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-greeting::before {
  content: '>';
  color: var(--green);
  font-weight: 700;
}

.hero-name {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -.03em;
}
.hero-name span {
  background: linear-gradient(135deg, var(--blue) 0%, var(--purple) 50%, var(--green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 24px;
  font-family: 'JetBrains Mono', monospace;
  min-height: 2rem;
}
.hero-role #typed { color: var(--text); }

.cursor {
  animation: blink .8s step-end infinite;
  color: var(--blue);
}
@keyframes blink { 50% { opacity: 0; } }

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: .875rem;
}
.hero-meta span {
  display: flex;
  align-items: center;
  gap: 7px;
}
.hero-meta svg { color: var(--blue); flex-shrink: 0; }

.hero-social {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.social-btn {
  width: 42px; height: 42px;
  border-radius: var(--radius);
  background: var(--surface2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: all var(--transition);
}
.social-btn:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: rgba(88,166,255,.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(88,166,255,.2);
  opacity: 1;
}
.social-btn svg { width: 18px; height: 18px; }
.social-btn.social-text {
  width: auto;
  padding: 0 13px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .72rem;
  font-weight: 700;
}

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

/* Hero Stats */
.hero-stats {
  max-width: var(--max-w);
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
  padding: 0 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--purple));
}
.stat-card:hover {
  border-color: rgba(88,166,255,.3);
  transform: translateY(-3px);
  box-shadow: var(--shadow-blue);
}

.stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--blue);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -.02em;
}

.stat-lbl {
  display: block;
  font-size: .75rem;
  color: var(--muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ── ABOUT ─────────────────────────────────────────────── */
#about {
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 50%, var(--bg) 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 18px;
  line-height: 1.85;
  font-size: .95rem;
}
.about-text p strong { color: var(--text); }
.about-text p a { color: var(--blue); }

.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 16px;
  transition: border-color var(--transition);
}
.detail-card:hover { border-color: var(--border2); }

.detail-card h3 {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--faint);
  margin-bottom: 18px;
  font-weight: 600;
}

.timeline { display: flex; flex-direction: column; gap: 22px; }
.timeline-item { display: flex; gap: 16px; }

.timeline-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--blue);
  margin-top: 6px;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(88,166,255,.5);
}

.timeline-content { display: flex; flex-direction: column; gap: 3px; }
.timeline-year {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  color: var(--blue);
}
.timeline-content strong { font-size: .88rem; color: var(--text); }
.timeline-content > span { font-size: .8rem; color: var(--muted); }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 5px;
  font-size: .7rem;
  font-weight: 600;
  margin-top: 5px;
}
.badge-gold {
  background: rgba(227,179,65,.12);
  border: 1px solid rgba(227,179,65,.3);
  color: var(--gold);
}

.identifiers ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.identifiers li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .82rem;
}
.identifiers li span:first-child { color: var(--muted); }
.identifiers li a, .identifiers li span:last-child {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  color: var(--blue);
}

/* ── SKILLS ────────────────────────────────────────────── */
#skills { background: var(--bg); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.skill-group::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  opacity: 0;
  transition: opacity var(--transition);
}
.skill-group:nth-child(1)::before { background: linear-gradient(90deg, var(--blue), var(--cyan)); }
.skill-group:nth-child(2)::before { background: linear-gradient(90deg, var(--red), var(--orange)); }
.skill-group:nth-child(3)::before { background: linear-gradient(90deg, var(--purple), var(--pink)); }
.skill-group:nth-child(4)::before { background: linear-gradient(90deg, var(--green), var(--cyan)); }
.skill-group:nth-child(5)::before { background: linear-gradient(90deg, var(--orange), var(--gold)); }
.skill-group:nth-child(6)::before { background: linear-gradient(90deg, var(--blue), var(--purple)); }

.skill-group:hover {
  border-color: var(--border2);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.skill-group:hover::before { opacity: 1; }

.skill-group h3 {
  font-size: .85rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
}

/* ── PROJECTS ──────────────────────────────────────────── */
#projects { background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}
.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(88,166,255,.04), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover {
  border-color: rgba(88,166,255,.4);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0,0,0,.5), 0 0 0 1px rgba(88,166,255,.1);
}
.project-card:hover::after { opacity: 1; }

.project-card.featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(88,166,255,.06) 0%, rgba(63,185,80,.03) 100%);
  border-color: rgba(88,166,255,.25);
}
.project-card.featured:hover { border-color: rgba(88,166,255,.5); }

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-icon { font-size: 1.6rem; line-height: 1; }

.project-links { display: flex; gap: 10px; }
.project-links a {
  color: var(--muted);
  transition: all var(--transition);
  display: flex;
  align-items: center;
}
.project-links a:hover {
  color: var(--blue);
  transform: translateY(-1px);
  opacity: 1;
}

.project-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .7rem;
  font-weight: 700;
  background: rgba(63,185,80,.12);
  border: 1px solid rgba(63,185,80,.3);
  color: var(--green);
  letter-spacing: .03em;
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}
.project-card p { font-size: .85rem; color: var(--muted); flex: 1; line-height: 1.7; }

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}
.project-tech span {
  padding: 3px 10px;
  border-radius: 5px;
  font-size: .72rem;
  font-weight: 500;
  background: var(--surface3);
  border: 1px solid var(--border2);
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}

/* ── PUBLICATIONS ──────────────────────────────────────── */
#publications {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.pub-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.pub-filter {
  padding: 7px 18px;
  border-radius: 20px;
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--muted);
  cursor: pointer;
  font-size: .82rem;
  font-weight: 600;
  transition: all var(--transition);
  font-family: 'JetBrains Mono', monospace;
}
.pub-filter:hover { border-color: var(--blue); color: var(--blue); }
.pub-filter.active {
  background: linear-gradient(135deg, var(--blue), var(--blue2));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 2px 12px rgba(88,166,255,.3);
}

.pub-list { display: flex; flex-direction: column; }

.pub-item {
  display: flex;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
  transition: background var(--transition);
}
.pub-item:last-child { border-bottom: none; }
.pub-item:hover { background: rgba(88,166,255,.02); margin: 0 -12px; padding-left: 12px; padding-right: 12px; border-radius: 8px; }

.pub-year {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  color: var(--blue);
  min-width: 40px;
  margin-top: 5px;
  font-weight: 600;
}

.pub-content { flex: 1; }

.pub-type {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 5px;
  font-size: .68rem;
  font-weight: 700;
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.pub-type.journal      { background: rgba(63,185,80,.12);   color: var(--green);  border: 1px solid rgba(63,185,80,.2);   }
.pub-type.book-chapter { background: rgba(88,166,255,.1);   color: var(--blue);   border: 1px solid rgba(88,166,255,.2);  }
.pub-type.conference   { background: rgba(188,140,255,.1);  color: var(--purple); border: 1px solid rgba(188,140,255,.2); }

.pub-content h4 { font-size: .92rem; font-weight: 600; line-height: 1.5; margin-bottom: 5px; }
.pub-venue      { font-size: .8rem; color: var(--muted); }
.pub-venue a    { color: var(--blue); }
.pub-authors    { font-size: .77rem; color: var(--faint); margin-top: 5px; font-style: italic; }

/* ── FUNDING ───────────────────────────────────────────── */
#funding { background: var(--bg); }

.awards-grid { display: grid; gap: 16px; }

.award-card {
  background: linear-gradient(135deg, rgba(227,179,65,.06), rgba(88,166,255,.03));
  border: 1px solid rgba(227,179,65,.2);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: all var(--transition);
}
.award-card:hover {
  border-color: rgba(227,179,65,.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(227,179,65,.08);
}
.award-icon { font-size: 2.4rem; flex-shrink: 0; }
.award-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 7px; }
.award-funder  { color: var(--blue); font-size: .85rem; margin-bottom: 5px; }
.award-period  {
  font-family: 'JetBrains Mono', monospace;
  font-size: .78rem;
  color: var(--gold);
  margin-bottom: 12px;
}
.award-card p:last-child { color: var(--muted); font-size: .875rem; line-height: 1.7; }

/* ── PEER REVIEWS ──────────────────────────────────────── */
#peer-reviews {
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
}

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

.review-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.review-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--purple));
}
.review-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-blue);
}
.review-publisher { font-weight: 700; margin-bottom: 8px; font-size: 1rem; }
.review-detail    { font-size: .8rem; color: var(--muted); font-family: 'JetBrains Mono', monospace; }

/* ── MEMBERSHIPS ───────────────────────────────────────── */
#memberships { background: var(--surface); }

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

.membership-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.membership-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.membership-card:hover::after { transform: scaleX(1); }
.membership-card:hover {
  border-color: var(--border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.membership-abbr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 7px;
  letter-spacing: .05em;
}
.membership-name { font-size: .85rem; font-weight: 500; margin-bottom: 5px; color: var(--text); }
.membership-type { font-size: .77rem; color: var(--muted); }

/* ── CERTIFICATIONS ────────────────────────────────────── */
#certifications {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

/* Kubestronaut featured card */
.kubestronaut-card {
  display: flex;
  align-items: center;
  gap: 28px;
  background: linear-gradient(135deg, rgba(88,166,255,.1) 0%, rgba(188,140,255,.08) 50%, rgba(63,185,80,.06) 100%);
  border: 1px solid rgba(88,166,255,.4);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: all var(--transition);
}
.kubestronaut-card:hover {
  border-color: rgba(88,166,255,.7);
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(88,166,255,.2), 0 0 0 1px rgba(88,166,255,.2);
  opacity: 1;
}
.kubestronaut-glow {
  position: absolute;
  top: -60px; right: -60px;
  width: 250px; height: 250px;
  background: radial-gradient(circle, rgba(88,166,255,.15), transparent 70%);
  pointer-events: none;
  animation: pulse-glow 3s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { opacity: .6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}
.kubestronaut-icon {
  font-size: 3.5rem;
  line-height: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 0 12px rgba(88,166,255,.6));
}
.kubestronaut-content { flex: 1; }
.kubestronaut-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 20px;
  font-size: .72rem;
  font-weight: 700;
  background: rgba(88,166,255,.15);
  border: 1px solid rgba(88,166,255,.3);
  color: var(--blue);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.kubestronaut-content h3 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--blue), var(--purple), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kubestronaut-content p {
  color: var(--muted);
  font-size: .875rem;
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 560px;
}
.kubestronaut-certs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.kubestronaut-certs span {
  padding: 4px 12px;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  font-weight: 700;
  background: rgba(88,166,255,.12);
  border: 1px solid rgba(88,166,255,.25);
  color: var(--blue);
}
.kubestronaut-arrow {
  color: var(--blue);
  font-size: .85rem;
  font-weight: 600;
  flex-shrink: 0;
  white-space: nowrap;
}

.cert-issuer-logo.ibm {
  background: rgba(20,107,230,.12);
  border: 1px solid rgba(20,107,230,.25);
  color: #1473E6;
}
.cert-ibm::before  { background: linear-gradient(180deg, #1473E6, #0047AB); }
.cert-ibm:hover    { border-color: rgba(20,107,230,.35); box-shadow: 0 8px 30px rgba(20,107,230,.1); }

.cert-group { margin-bottom: 48px; }
.cert-group:last-child { margin-bottom: 0; }

.cert-group-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
}
.cert-group-icon { font-size: 1.1rem; font-style: normal; }

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition);
  color: var(--text);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.cert-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  transition: opacity var(--transition);
  opacity: .6;
}
.cert-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  opacity: 1;
}
.cert-card:hover::before { opacity: 1; }

/* Colour variants */
.cert-k8s::before { background: linear-gradient(180deg, var(--blue), var(--purple)); }
.cert-k8s:hover   { border-color: rgba(88,166,255,.35); box-shadow: 0 8px 30px rgba(88,166,255,.1); }

.cert-tf::before  { background: linear-gradient(180deg, var(--purple), #7B42BC); }
.cert-tf:hover    { border-color: rgba(188,140,255,.35); box-shadow: 0 8px 30px rgba(188,140,255,.1); }

.cert-aws::before { background: linear-gradient(180deg, var(--orange), var(--gold)); }
.cert-aws:hover   { border-color: rgba(240,136,62,.35); box-shadow: 0 8px 30px rgba(240,136,62,.1); }

.cert-ms::before  { background: linear-gradient(180deg, #00A4EF, #7FBA00); }
.cert-ms:hover    { border-color: rgba(0,164,239,.35); box-shadow: 0 8px 30px rgba(0,164,239,.1); }

/* Logo badge */
.cert-issuer-logo {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .03em;
  flex-shrink: 0;
}
.cert-issuer-logo.cncf {
  background: rgba(88,166,255,.12);
  border: 1px solid rgba(88,166,255,.25);
  color: var(--blue);
}
.cert-issuer-logo.hashi {
  background: rgba(188,140,255,.12);
  border: 1px solid rgba(188,140,255,.25);
  color: var(--purple);
}
.cert-issuer-logo.aws {
  background: rgba(240,136,62,.12);
  border: 1px solid rgba(240,136,62,.25);
  color: var(--orange);
}
.cert-issuer-logo.ms {
  background: rgba(0,164,239,.12);
  border: 1px solid rgba(0,164,239,.25);
  color: #00A4EF;
}

.cert-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.cert-info h4 {
  font-size: .85rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
}
.cert-issuer {
  font-size: .75rem;
  color: var(--muted);
}
.cert-abbr {
  font-family: 'JetBrains Mono', monospace;
  font-size: .7rem;
  color: var(--faint);
}
.cert-id {
  font-family: 'JetBrains Mono', monospace;
  font-size: .67rem;
  color: var(--faint);
}
.cert-link {
  font-size: .75rem;
  color: var(--blue);
  margin-top: 2px;
}

@media (max-width: 960px) {
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .cert-grid { grid-template-columns: 1fr; }
}

/* ── BLOG ──────────────────────────────────────────────── */
#blog { background: var(--bg); }

.blog-series-banner {
  background: linear-gradient(135deg, rgba(88,166,255,.07) 0%, rgba(63,185,80,.04) 50%, rgba(188,140,255,.04) 100%);
  border: 1px solid rgba(88,166,255,.2);
  border-radius: var(--radius-xl);
  padding: 48px;
  position: relative;
  overflow: hidden;
}
.blog-series-banner::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(88,166,255,.06), transparent 70%);
  pointer-events: none;
}

.series-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 700;
  background: rgba(88,166,255,.12);
  border: 1px solid rgba(88,166,255,.3);
  color: var(--blue);
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.blog-series-banner h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 14px; letter-spacing: -.02em; }
.blog-series-banner > p { color: var(--muted); margin-bottom: 28px; max-width: 700px; line-height: 1.8; font-size: .95rem; }

.series-links { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }

.series-part {
  padding: 7px 15px;
  border-radius: var(--radius);
  font-size: .8rem;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  transition: all var(--transition);
}
a.series-part:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(88,166,255,.08);
  transform: translateY(-2px);
  opacity: 1;
}
.series-part.muted { color: var(--faint); border-color: var(--border); }

/* ── CONTACT ───────────────────────────────────────────── */
#contact {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

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

.contact-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  color: var(--text);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(88,166,255,.06), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.contact-card:hover {
  border-color: rgba(88,166,255,.4);
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(0,0,0,.4), 0 0 0 1px rgba(88,166,255,.1);
  color: var(--text);
  opacity: 1;
}
.contact-card:hover::before { opacity: 1; }
.contact-card svg   { color: var(--blue); position: relative; z-index: 1; }
.contact-card span  { font-weight: 700; font-size: .9rem; position: relative; z-index: 1; }
.contact-card small { color: var(--muted); font-size: .75rem; position: relative; z-index: 1; font-family: 'JetBrains Mono', monospace; }

/* ── FOOTER ────────────────────────────────────────────── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 56px 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.footer-name { font-weight: 800; font-size: 1.15rem; margin-bottom: 7px; letter-spacing: -.02em; }
.footer-sub  { color: var(--muted); font-size: .85rem; margin-bottom: 24px; }

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 24px;
}

.footer-links a {
  color: var(--muted);
  font-size: .82rem;
  padding: 5px 11px;
  border-radius: 5px;
  transition: all var(--transition);
}
.footer-links a:hover { color: var(--blue); background: rgba(88,166,255,.08); opacity: 1; }

.footer-copy { color: var(--faint); font-size: .77rem; }
.footer-copy a { color: var(--faint); }
.footer-copy a:hover { color: var(--blue); opacity: 1; }

/* ── SCROLL REVEAL ─────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 960px) {
  .about-grid        { grid-template-columns: 1fr; }
  .skills-grid       { grid-template-columns: repeat(2, 1fr); }
  .projects-grid     { grid-template-columns: repeat(2, 1fr); }
  .project-card.featured { grid-column: 1 / -1; }
  .memberships-grid  { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid      { grid-template-columns: repeat(2, 1fr); }
  .contact-grid      { grid-template-columns: repeat(2, 1fr); }
  .hero-stats        { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 680px) {
  section { padding: 72px 0; }

  .hero-container {
    flex-direction: column;
    text-align: center;
    gap: 36px;
  }
  .hero-social   { justify-content: center; }
  .hero-btns     { justify-content: center; }
  .hero-meta     { align-items: center; }
  .hero-stats    { grid-template-columns: repeat(2, 1fr); padding: 0 16px; }
  .hero-greeting { justify-content: center; }

  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(6,9,16,.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }

  .skills-grid      { grid-template-columns: 1fr; }
  .projects-grid    { grid-template-columns: 1fr; }
  .memberships-grid { grid-template-columns: 1fr; }
  .reviews-grid     { grid-template-columns: 1fr; }
  .contact-grid     { grid-template-columns: repeat(2, 1fr); }
  .award-card       { flex-direction: column; }
  .pub-item         { flex-direction: column; gap: 8px; }
  .pub-year         { min-width: unset; }
  .blog-series-banner { padding: 28px; }
}