/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --bg:        #06060f;
  --bg-alt:    #0c0c1a;
  --bg-card:   rgba(255,255,255,0.03);
  --border:    rgba(255,255,255,0.07);

  --purple:      #7c3aed;
  --purple-mid:  #9333ea;
  --purple-lite: #a855f7;
  --cyan:        #06b6d4;
  --cyan-lite:   #22d3ee;
  --green:       #10b981;
  --pink:        #ec4899;

  --txt:        #f1f5f9;
  --txt-2:      #94a3b8;
  --txt-3:      #475569;

  --sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:  'JetBrains Mono', 'Fira Code', monospace;

  --r:   12px;
  --r2:  20px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t:   0.3s var(--ease);
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--txt);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--purple); border-radius: 4px; }

/* ============================================================
   Navbar
   ============================================================ */
#navbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 900;
  padding: 1.1rem 0;
  transition: padding var(--t), background var(--t), border-color var(--t);
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(6,6,15,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-color: var(--border);
  padding: 0.75rem 0;
}
.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--purple-lite), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.04em;
}
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--txt-2);
  transition: color var(--t);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--purple-lite);
  transition: width var(--t);
}
.nav-links a:hover,
.nav-links a.active { color: var(--txt); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-cta {
  background: rgba(124,58,237,0.15) !important;
  border: 1px solid rgba(124,58,237,0.3);
  border-radius: 100px;
  padding: 0.4rem 1.1rem;
  color: var(--purple-lite) !important;
}
.nav-cta:hover {
  background: rgba(124,58,237,0.28) !important;
}
.nav-cta::after { display: none !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(--txt);
  border-radius: 2px;
  transition: var(--t);
}

/* ============================================================
   Mobile Menu
   ============================================================ */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 950;
  background: var(--bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
}
.mobile-menu.open { display: flex; }
.mobile-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  background: none; border: none;
  color: var(--txt-2);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color var(--t);
}
.mobile-close:hover { color: var(--txt); }
.mobile-menu ul { text-align: center; }
.mobile-menu li { margin: 0.75rem 0; }
.mobile-link {
  font-size: 2rem;
  font-weight: 800;
  color: var(--txt-2);
  transition: color var(--t);
}
.mobile-link:hover { color: var(--purple-lite); }

/* ============================================================
   Hero
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
#neuralCanvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}
/* radial gradient overlay so text is readable */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 50%, rgba(6,6,15,0.55) 0%, transparent 100%);
  z-index: 2;
  pointer-events: none;
}
/* bottom fade into next section */
#hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 220px;
  background: linear-gradient(transparent, var(--bg));
  z-index: 3;
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  top: 30%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.18) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  animation: glow-pulse 4s ease-in-out infinite;
}
@keyframes glow-pulse {
  0%, 100% { transform: translate(-50%,-50%) scale(1); opacity: 0.7; }
  50%       { transform: translate(-50%,-50%) scale(1.15); opacity: 1; }
}
.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 820px;
  padding: 0 2rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: 100px;
  padding: 0.35rem 1rem;
  font-size: 0.78rem;
  color: var(--green);
  margin-bottom: 1.5rem;
  animation: fade-up 0.7s var(--ease) both;
}
.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: badge-blink 2s ease-in-out infinite;
}
@keyframes badge-blink {
  0%,100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.5); }
  50%      { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}
.hero-name {
  font-size: clamp(3.2rem, 9vw, 6.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin-bottom: 0.75rem;
  animation: fade-up 0.7s var(--ease) 0.1s both;
}
.name-first { display: block; }
.gradient-text {
  background: linear-gradient(135deg, var(--purple-lite) 0%, var(--cyan) 50%, var(--pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-family: var(--mono);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--cyan-lite);
  margin-bottom: 1.25rem;
  min-height: 1.8em;
  animation: fade-up 0.7s var(--ease) 0.2s both;
}
.cursor { animation: blink 1s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--txt-2);
  max-width: 580px;
  margin: 0 auto 2rem;
  line-height: 1.85;
  animation: fade-up 0.7s var(--ease) 0.3s both;
}
.hero-cta {
  display: flex;
  gap: 0.875rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
  animation: fade-up 0.7s var(--ease) 0.4s both;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform var(--t), box-shadow var(--t), background var(--t), border-color var(--t);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--purple), var(--purple-mid));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.6);
}
.btn-outline {
  background: transparent;
  color: var(--txt);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--purple-lite);
  background: rgba(124,58,237,0.08);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--txt-2);
  border-color: var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
}
.btn-ghost:hover {
  color: var(--cyan-lite);
  border-color: rgba(6,182,212,0.4);
  background: rgba(6,182,212,0.06);
  transform: translateY(-2px);
}
.hero-socials {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  animation: fade-up 0.7s var(--ease) 0.5s both;
}
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--txt-2);
  transition: var(--t);
}
.social-link:hover {
  border-color: var(--purple-lite);
  color: var(--purple-lite);
  background: rgba(124,58,237,0.1);
  transform: translateY(-2px);
}
.scroll-hint {
  position: absolute;
  bottom: 2.5rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  z-index: 10;
  animation: fade-up 1s var(--ease) 1s both;
}
.scroll-line {
  width: 1px; height: 48px;
  background: linear-gradient(to bottom, var(--purple-lite), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
.scroll-hint span {
  font-size: 0.6rem;
  font-family: var(--mono);
  color: var(--txt-3);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
@keyframes scroll-pulse { 0%,100%{opacity:0.3} 50%{opacity:1} }

/* ============================================================
   Shared Section Styles
   ============================================================ */
.section { padding: 6.5rem 0; }
.section-alt { background: var(--bg-alt); }
.container { max-width: 1160px; margin: 0 auto; padding: 0 2rem; }
.section-header { margin-bottom: 3.5rem; }
.section-header.centered { text-align: center; }
.section-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--purple-lite);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
}
.section-sub {
  color: var(--txt-2);
  font-size: 1rem;
  margin-top: 0.6rem;
}

/* ============================================================
   Scroll-reveal animation
   ============================================================ */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
[data-animate] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-text p {
  color: var(--txt-2);
  font-size: 1rem;
  line-height: 1.85;
  margin-bottom: 1.2rem;
}
.about-text strong { color: var(--txt); }
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}
.stat {
  text-align: center;
  padding: 1.1rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  transition: border-color var(--t), background var(--t);
}
.stat:hover {
  border-color: rgba(124,58,237,0.35);
  background: rgba(124,58,237,0.05);
}
.stat-num {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--purple-lite), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.2rem;
}
.stat-label {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--txt-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Terminal card */
.about-terminal {
  background: #090913;
  border: 1px solid var(--border);
  border-radius: var(--r2);
  overflow: hidden;
  box-shadow: 0 0 60px rgba(124,58,237,0.07), 0 20px 60px rgba(0,0,0,0.4);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 1.1rem;
  background: rgba(255,255,255,0.025);
  border-bottom: 1px solid var(--border);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }
.terminal-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--txt-3);
  margin-left: 0.5rem;
}
.terminal-body {
  padding: 1.5rem 1.4rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.9;
  overflow-x: auto;
}
.c-comment { color: #475569; }
.c-kw      { color: var(--purple-lite); }
.c-var     { color: var(--cyan-lite); }
.c-key     { color: #c4b5fd; }
.c-str     { color: var(--green); }
.c-bool    { color: #fb923c; }

/* ============================================================
   Experience Timeline
   ============================================================ */
.timeline { display: flex; flex-direction: column; gap: 0; }
.tl-item {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 1.5rem;
}
.tl-spine {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 4px;
}
.tl-node {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--purple);
  border: 2px solid var(--purple-lite);
  box-shadow: 0 0 16px rgba(124,58,237,0.7);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}
.tl-node-ring {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1px solid rgba(168,85,247,0.4);
  animation: ring-pulse 2.5s ease-in-out infinite;
}
@keyframes ring-pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50%     { transform: scale(1.5); opacity: 0; }
}
.tl-line {
  width: 1px;
  flex: 1;
  min-height: 40px;
  background: linear-gradient(to bottom, rgba(124,58,237,0.5), rgba(124,58,237,0.05));
  margin-top: 6px;
}
.tl-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.75rem;
  margin-bottom: 2rem;
  transition: border-color var(--t), background var(--t), transform var(--t);
}
.tl-card:hover {
  border-color: rgba(124,58,237,0.28);
  background: rgba(124,58,237,0.035);
  transform: translateX(4px);
}
.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.tl-role {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.tl-company {
  font-size: 0.875rem;
  color: var(--purple-lite);
  font-family: var(--mono);
}
.tl-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
  flex-shrink: 0;
}
.tl-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--txt-3);
}
.tl-badge {
  font-size: 0.65rem;
  font-family: var(--mono);
  padding: 0.2rem 0.65rem;
  border-radius: 100px;
}
.tl-badge.active {
  background: rgba(16,185,129,0.1);
  color: var(--green);
  border: 1px solid rgba(16,185,129,0.3);
}
.tl-bullets { margin-bottom: 1.25rem; }
.tl-bullets li {
  position: relative;
  padding-left: 1.2rem;
  color: var(--txt-2);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 0.45rem;
}
.tl-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--cyan);
}
.tl-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  color: var(--purple-lite);
}

/* ============================================================
   Skills
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.skill-cat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.75rem;
  transition: border-color var(--t);
}
.skill-cat:hover { border-color: rgba(124,58,237,0.25); }
.sk-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.sk-icon { font-size: 1.15rem; }
.sk-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.sk-tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  border: 1px solid;
  transition: transform var(--t), background var(--t);
  cursor: default;
}
.sk-tag.p {
  background: rgba(124,58,237,0.1);
  border-color: rgba(124,58,237,0.28);
  color: var(--purple-lite);
}
.sk-tag.p:hover {
  background: rgba(124,58,237,0.22);
  transform: translateY(-1px);
}
.sk-tag.c {
  background: rgba(6,182,212,0.08);
  border-color: rgba(6,182,212,0.22);
  color: var(--cyan-lite);
}
.sk-tag.c:hover {
  background: rgba(6,182,212,0.18);
  transform: translateY(-1px);
}

/* ============================================================
   Projects
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.proj-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--t), background var(--t), transform var(--t), box-shadow var(--t);
}
.proj-card:hover {
  border-color: rgba(124,58,237,0.4);
  background: rgba(124,58,237,0.04);
  transform: translateY(-5px);
  box-shadow: 0 24px 48px rgba(0,0,0,0.35), 0 0 0 1px rgba(124,58,237,0.18);
}
.proj-card.featured {
  border-color: rgba(124,58,237,0.2);
  background: rgba(124,58,237,0.03);
}
.proj-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.proj-icon { font-size: 2.1rem; }
.proj-gh {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--txt-2);
  transition: var(--t);
}
.proj-gh:hover {
  border-color: var(--purple-lite);
  color: var(--purple-lite);
}
.proj-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
  line-height: 1.35;
}
.proj-desc {
  font-size: 0.85rem;
  color: var(--txt-2);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.proj-feats { margin-bottom: 1.25rem; flex: 1; }
.proj-feats li {
  position: relative;
  padding-left: 1.2rem;
  font-size: 0.82rem;
  color: var(--txt-2);
  line-height: 1.7;
  margin-bottom: 0.3rem;
}
.proj-feats li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--cyan);
}
.proj-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: auto;
}
.stk {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 0.15rem 0.55rem;
  border-radius: 5px;
  background: rgba(6,182,212,0.07);
  border: 1px solid rgba(6,182,212,0.18);
  color: var(--cyan-lite);
}

/* ============================================================
   Publications
   ============================================================ */
.pubs-list { display: flex; flex-direction: column; gap: 1rem; }
.pub-card {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.5rem 1.75rem;
  align-items: flex-start;
  transition: border-color var(--t), background var(--t);
}
.pub-card:hover {
  border-color: rgba(124,58,237,0.28);
  background: rgba(124,58,237,0.03);
}
.pub-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.pub-role {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  white-space: nowrap;
}
.pub-role.first {
  background: rgba(236,72,153,0.1);
  border: 1px solid rgba(236,72,153,0.3);
  color: var(--pink);
}
.pub-role.co {
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.3);
  color: var(--purple-lite);
}
.pub-cite {
  text-align: center;
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.2);
  border-radius: 8px;
  padding: 0.45rem 0.65rem;
}
.cite-num {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--green);
  line-height: 1.1;
}
.cite-lbl {
  font-size: 0.62rem;
  font-family: var(--mono);
  color: var(--txt-3);
}
.pub-body { flex: 1; }
.pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.55;
  margin-bottom: 0.4rem;
}
.pub-venue {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--txt-3);
  margin-bottom: 0.6rem;
}
.pub-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--purple-lite);
  opacity: 0.7;
  transition: opacity var(--t), color var(--t);
}
.pub-link:hover {
  opacity: 1;
  color: var(--cyan-lite);
}

/* ============================================================
   Credentials (Certs + Education)
   ============================================================ */
.creds-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.cred-card {
  display: flex;
  gap: 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.75rem;
  align-items: flex-start;
  transition: border-color var(--t), transform var(--t);
}
.cred-card:hover {
  border-color: rgba(124,58,237,0.28);
  transform: translateY(-3px);
}
.cred-icon { font-size: 2.2rem; flex-shrink: 0; line-height: 1; }
.cred-type {
  display: block;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--txt-3);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.35rem;
}
.cred-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  line-height: 1.35;
}
.cred-issuer {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--purple-lite);
  margin-bottom: 0.6rem;
}
.cred-desc {
  font-size: 0.825rem;
  color: var(--txt-2);
  line-height: 1.65;
}
.cred-desc strong { color: var(--txt); }

/* ============================================================
   Contact
   ============================================================ */
.contact-section { padding-bottom: 8rem; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 1.5rem;
  transition: border-color var(--t), background var(--t), transform var(--t);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.06), transparent);
  opacity: 0;
  transition: opacity var(--t);
}
.contact-card:hover {
  border-color: rgba(124,58,237,0.4);
  transform: translateY(-3px);
}
.contact-card:hover::before { opacity: 1; }
.cc-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px; height: 50px;
  border-radius: 12px;
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  color: var(--purple-lite);
  flex-shrink: 0;
  transition: background var(--t);
  position: relative;
}
.contact-card:hover .cc-icon { background: rgba(124,58,237,0.2); }
.cc-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--txt-3);
  margin-bottom: 0.2rem;
}
.cc-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--txt);
}
.cc-arrow {
  margin-left: auto;
  font-size: 1.1rem;
  color: var(--txt-3);
  transition: transform var(--t), color var(--t);
  position: relative;
}
.contact-card:hover .cc-arrow {
  transform: translateX(4px);
  color: var(--purple-lite);
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
}
footer p {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--txt-3);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .creds-grid    { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links  { display: none; }
  .nav-toggle { display: flex; }

  .about-grid      { grid-template-columns: 1fr; gap: 2rem; }
  .stat-row        { grid-template-columns: repeat(2, 1fr); }
  .skills-grid     { grid-template-columns: 1fr; }
  .projects-grid   { grid-template-columns: 1fr; }
  .creds-grid      { grid-template-columns: 1fr; }
  .contact-grid    { grid-template-columns: 1fr; }

  .tl-header       { flex-direction: column; gap: 0.5rem; }
  .tl-right        { align-items: flex-start; }

  .pub-card        { flex-direction: column; gap: 0.75rem; }
  .pub-left        { flex-direction: row; align-items: center; }

  .section         { padding: 4.5rem 0; }
  .hero-cta        { flex-direction: column; align-items: center; }
  .hero-glow       { width: 340px; height: 340px; }
}

@media (max-width: 480px) {
  .container     { padding: 0 1.25rem; }
  .stat-row      { grid-template-columns: repeat(2, 1fr); }
}