:root {
  --bg: #07090f;
  --bg-elev: #101522;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #eef2ff;
  --muted: #94a3b8;
  --accent: #2dd4bf;
  --accent-2: #818cf8;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  --radius: 20px;
  --max: 1080px;
  --font: "DM Sans", "Noto Sans SC", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

img,
svg {
  display: block;
  max-width: 100%;
}

.bg-glow {
  position: fixed;
  inset: -20% auto auto 40%;
  width: 55vw;
  height: 55vw;
  background:
    radial-gradient(circle at 30% 30%, rgba(45, 212, 191, 0.22), transparent 55%),
    radial-gradient(circle at 70% 40%, rgba(99, 102, 241, 0.22), transparent 50%);
  filter: blur(12px);
  pointer-events: none;
  z-index: -1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  backdrop-filter: blur(14px);
  background: rgba(7, 9, 15, 0.7);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  border-bottom-color: var(--card-border);
}

.logo {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.1rem;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.95rem;
  color: var(--muted);
}

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

.nav-cta {
  color: var(--bg) !important;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-weight: 600;
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card);
  padding: 0;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
  padding: 4rem 0 3rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #041016;
  background: linear-gradient(135deg, var(--accent), #67e8f9);
}

.btn-ghost {
  border-color: var(--card-border);
  background: var(--card);
  color: var(--text);
}

.hero-stats {
  display: flex;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-stats li {
  display: grid;
  gap: 0.15rem;
}

.hero-stats strong {
  font-size: 1.4rem;
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--card-border);
  border-radius: 28px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.avatar {
  width: 140px;
  height: 140px;
  margin: 0.5rem auto 1.25rem;
  border-radius: 32px;
  overflow: hidden;
  background: #0b1220;
  border: 1px solid var(--card-border);
}

.hero-meta {
  text-align: center;
}

.hero-meta h2 {
  margin: 0;
  font-size: 1.35rem;
}

.hero-meta p {
  margin: 0.35rem 0 1rem;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.tags span,
.project-tags span,
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: rgba(45, 212, 191, 0.1);
  color: #99f6e4;
  font-size: 0.8rem;
  border: 1px solid rgba(45, 212, 191, 0.18);
}

.section {
  padding: 4rem 0 1rem;
}

.section-head {
  margin-bottom: 1.75rem;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -0.02em;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem 2rem;
}

.about-grid p,
.about-list {
  margin: 0;
  color: var(--muted);
}

.about-list {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  padding: 0;
  list-style: none;
}

.about-list li {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1rem 1.1rem;
  color: var(--text);
}

.skills-grid,
.projects-grid {
  display: grid;
  gap: 1rem;
}

.skills-grid {
  grid-template-columns: repeat(4, 1fr);
}

.skill-card,
.project-card,
.contact-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.skill-card h3,
.project-card h3 {
  margin: 0 0 0.85rem;
}

.skill-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.skill-card li + li {
  margin-top: 0.35rem;
}

.projects-grid {
  grid-template-columns: repeat(2, 1fr);
}

.project-card.featured {
  background:
    linear-gradient(135deg, rgba(45, 212, 191, 0.12), rgba(99, 102, 241, 0.12)),
    var(--card);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.year {
  color: var(--muted);
  font-size: 0.85rem;
}

.project-card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.project-tags span {
  background: rgba(129, 140, 248, 0.12);
  color: #c7d2fe;
  border-color: rgba(129, 140, 248, 0.2);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.timeline li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--card);
}

.time {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
}

.role h3 {
  margin: 0 0 0.2rem;
}

.org {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.role p:last-child {
  margin: 0;
  color: var(--muted);
}

.contact {
  padding-bottom: 2rem;
}

.contact-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background:
    radial-gradient(circle at top, rgba(45, 212, 191, 0.16), transparent 55%),
    var(--card);
}

.contact-card h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.contact-card > p:nth-of-type(2) {
  margin: 0 auto 1.5rem;
  max-width: 32rem;
  color: var(--muted);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--card-border);
}

.site-footer .muted {
  opacity: 0.75;
}

@media (max-width: 900px) {
  .hero,
  .about-grid,
  .skills-grid,
  .projects-grid,
  .timeline li {
    grid-template-columns: 1fr;
  }

  .about-list {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .menu-btn {
    display: inline-block;
  }

  .nav {
    position: absolute;
    top: 64px;
    right: 1.25rem;
    left: 1.25rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.75rem;
    background: #0d1320;
    border: 1px solid var(--card-border);
    border-radius: 16px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 0.85rem;
    border-radius: 12px;
  }

  .nav a:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    padding-top: 2rem;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }
}