:root {
  --bg: #08080b;
  --bg-soft: #0f0f14;
  --surface: #131318;
  --surface-2: #1a1a22;
  --border: #24242e;
  --text: #f2f2f5;
  --text-dim: #9d9daa;
  --text-faint: #6b6b78;
  --accent: #8b5cf6;
  --accent-2: #c084fc;
  --accent-soft: rgba(139, 92, 246, 0.12);
  --cyan: #22d3ee;
  --radius: 16px;
  --maxw: 1100px;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::selection { background: var(--accent); color: #fff; }

/* ---------- background fx ---------- */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.18), transparent 70%);
  left: var(--x, 50%);
  top: var(--y, 20%);
  transform: translate(-50%, -50%);
  transition: opacity 0.4s;
}
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}
.bg-orb--1 {
  width: 480px; height: 480px;
  background: #6d28d9;
  top: -120px; right: -120px;
}
.bg-orb--2 {
  width: 420px; height: 420px;
  background: #0ea5b7;
  bottom: 10%; left: -160px;
  opacity: 0.18;
}

main, header, footer { position: relative; z-index: 1; }

/* ---------- nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0) 45%),
    rgba(8, 8, 11, 0.55);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset, 0 10px 30px rgba(0,0,0,0.2);
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}
.nav::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  pointer-events: none;
}
.nav.scrolled {
  border-color: rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0) 50%),
    rgba(8, 8, 11, 0.82);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 12px 36px rgba(0,0,0,0.35);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}
.nav__brand span { color: var(--accent); }
.nav__links {
  display: flex;
  position: relative;
  gap: 28px;
  font-size: 0.88rem;
  color: var(--text-dim);
  flex: 1;
  justify-content: center;
}
.nav__links a { transition: color 0.2s; position: relative; }
.nav__links a:hover { color: var(--text); }
.nav__links a.active { color: var(--text); }
.nav__indicator {
  position: absolute;
  left: 0; bottom: -6px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0;
  transform: translateX(0);
  transition: transform 0.35s cubic-bezier(.2,.7,.2,1), width 0.35s cubic-bezier(.2,.7,.2,1), opacity 0.2s ease;
  pointer-events: none;
}
.nav__cta { white-space: nowrap; }
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__burger span {
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), #6d28d9);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(139, 92, 246, 0.6);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -6px rgba(139, 92, 246, 0.75);
}
.btn--ghost {
  background: rgba(255,255,255,0.03);
  border-color: var(--border);
  color: var(--text);
}
.btn--ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* ---------- hero ---------- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 180px 24px 120px;
}
.hero--centered {
  display: flex;
  justify-content: center;
  text-align: center;
}
.hero--centered .hero__inner { max-width: 720px; }
.hero--centered .hero__actions,
.hero--centered .hero__contact { justify-content: center; }
.hero--centered .hero__summary { margin-left: auto; margin-right: auto; }
.hero__eyebrow {
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.hero--centered .hero__eyebrow { margin-top: 6px; }
.hero__name {
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero__role {
  font-size: 1.15rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 22px;
}
.hero__role .dot { color: var(--accent); margin: 0 4px; }
.hero__summary {
  max-width: 52ch;
  color: var(--text-dim);
  font-size: 1.02rem;
  margin-bottom: 34px;
}
.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 34px;
}
.hero__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 0.86rem;
  color: var(--text-faint);
}
.hero__contact a { transition: color 0.2s; }
.hero__contact a:hover { color: var(--accent-2); }

/* ---------- sections ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px 24px;
}
.section__head { margin-bottom: 56px; }
.section__tag {
  display: inline-block;
  color: var(--accent-2);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section__head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-dim);
}
.section__head h2 br { display: block; }

/* ---------- about ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.about__text {
  font-size: 1.15rem;
  color: var(--text-dim);
}
.about__text strong { color: var(--text); font-weight: 600; }
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.25s, transform 0.25s;
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.stat-card__num {
  display: block;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 6px;
}
.stat-card__label {
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* ---------- timeline ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border) 90%);
}
.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 28px;
  padding-bottom: 44px;
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__marker {
  position: relative;
  top: 6px;
}
.timeline__marker span {
  display: block;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  position: relative;
}
.timeline__marker span::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--accent);
}
.timeline__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  transition: border-color 0.25s, transform 0.25s;
}
.timeline__card:hover { border-color: var(--accent); transform: translateY(-2px); }
.timeline__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.timeline__date {
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 600;
  letter-spacing: 0.03em;
}
.timeline__badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.timeline__badge--current {
  background: rgba(74, 222, 128, 0.12);
  color: #4ade80;
}
.timeline__card h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.timeline__org {
  color: var(--accent-2);
  font-size: 0.92rem;
  font-weight: 500;
  margin-bottom: 16px;
}
.timeline__card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}
.timeline__card li {
  position: relative;
  padding-left: 18px;
  color: var(--text-dim);
  font-size: 0.94rem;
}
.timeline__card li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-faint);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tags span {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-2);
  background: var(--accent-soft);
  border: 1px solid rgba(139, 92, 246, 0.25);
  padding: 5px 11px;
  border-radius: 999px;
}

/* ---------- projects ---------- */
.project-card {
  display: block;
  background: linear-gradient(155deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 100% 0%, rgba(139,92,246,0.14), transparent 55%);
  pointer-events: none;
}
.project-card__body { position: relative; max-width: 62ch; }
.project-card__eyebrow {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 600;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  padding: 4px 11px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.project-card h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.project-card__sub {
  font-weight: 500;
  color: var(--text-faint);
  font-size: 1rem;
}
.project-card p {
  color: var(--text-dim);
  font-size: 0.96rem;
  margin-bottom: 20px;
}
.project-card .tags { margin-bottom: 22px; }
.project-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-2);
  font-weight: 600;
  font-size: 0.92rem;
  transition: gap 0.2s;
}
.project-card:hover .project-card__cta { gap: 12px; }

/* ---------- education ---------- */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: border-color 0.25s, transform 0.25s;
}
.edu-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.edu-card__date {
  font-size: 0.8rem;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 12px;
}
.edu-card h3 {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.edu-card__field {
  color: var(--accent-2);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.edu-card__org {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 4px;
}
.edu-card__cgpa {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.1);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.edu-card ul { display: flex; flex-direction: column; gap: 8px; }
.edu-card li {
  position: relative;
  padding-left: 18px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.edu-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--text-faint);
}

/* ---------- skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.25s, transform 0.25s;
}
.skill-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.skill-card h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 14px;
}

.awards {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}
.awards h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.awards ul { display: flex; flex-direction: column; gap: 16px; }
.awards li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  color: var(--text-dim);
  font-size: 0.92rem;
}
.awards li svg { flex-shrink: 0; color: var(--accent-2); margin-top: 2px; }
.awards li strong { color: var(--text); }

/* ---------- contact ---------- */
.contact { padding-bottom: 60px; }
.contact__card {
  background: linear-gradient(155deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.contact__card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(139,92,246,0.15), transparent 60%);
  pointer-events: none;
}
.contact__card .section__tag { display: block; }
.contact__card h2 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 14px 0 18px;
}
.contact__card p {
  max-width: 46ch;
  margin: 0 auto 34px;
  color: var(--text-dim);
}
.contact__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

/* ---------- footer ---------- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 24px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-faint);
  font-size: 0.82rem;
  border-top: 1px solid var(--border);
}
.footer__top { color: var(--text-dim); transition: color 0.2s; }
.footer__top:hover { color: var(--accent-2); }

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(.2,.7,.2,1), transform 0.7s cubic-bezier(.2,.7,.2,1);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero { padding-top: 140px; }
  .about__grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .project-card { padding: 28px; }
  .contact__card { padding: 44px 28px; }
}

@media (max-width: 640px) {
  .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .nav__indicator { display: none; }
  .nav__burger span:nth-child(1),
  .nav__burger span:nth-child(3) { transition: transform 0.25s ease, opacity 0.25s ease; }
  .nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__burger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav__links {
    display: flex;
    position: absolute;
    top: calc(100% + 10px); left: 16px; right: 16px;
    flex-direction: column;
    background:
      linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.02) 55%),
      rgba(15, 15, 20, 0.92);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 18px;
    padding: 0 10px;
    gap: 2px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(0.98);
    transform-origin: top center;
    box-shadow: 0 1px 0 rgba(255,255,255,0.08) inset, 0 20px 40px -10px rgba(0,0,0,0.55);
    transition: max-height 0.35s cubic-bezier(.2,.7,.2,1), opacity 0.25s ease, transform 0.3s cubic-bezier(.2,.7,.2,1), padding 0.35s ease;
  }
  .nav__links.open {
    max-height: 340px;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    padding: 10px;
  }
  .nav__links a {
    opacity: 0;
    transform: translateY(-6px);
    padding: 12px 14px;
    border-radius: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: color 0.2s, background 0.2s, opacity 0.25s ease, transform 0.25s ease;
  }
  .nav__links a:last-child { border-bottom: none; }
  .nav__links a:active,
  .nav__links.open a:hover {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text);
  }
  .nav__links.open a { opacity: 1; transform: translateY(0); }
  .nav__links.open a:nth-child(1) { transition-delay: 0.05s; }
  .nav__links.open a:nth-child(2) { transition-delay: 0.1s; }
  .nav__links.open a:nth-child(3) { transition-delay: 0.15s; }
  .nav__links.open a:nth-child(4) { transition-delay: 0.2s; }
  .nav__links.open a:nth-child(5) { transition-delay: 0.25s; }
  .nav__links.open a:nth-child(6) { transition-delay: 0.3s; }
  .section { padding: 72px 20px; }
  .skills-grid { grid-template-columns: 1fr; }
  .timeline__item { grid-template-columns: 14px 1fr; gap: 18px; }
  .timeline__card { padding: 22px; }
  .contact__card { padding: 36px 20px; }
  .footer { flex-direction: column; gap: 12px; text-align: center; }
}

/* ---------- print ---------- */
@media print {
  .nav, .bg-fx, .footer__top { display: none; }
  body { background: #fff; color: #000; }
}