:root {
  --bg: #0b1020;
  --bg-elev: rgba(18, 24, 44, 0.72);
  --text: #eef1f8;
  --muted: #9aa3b8;
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --card-border: rgba(255, 255, 255, 0.08);
  --radius: 18px;
  --font: "DM Sans", system-ui, sans-serif;
  --display: "Instrument Serif", Georgia, serif;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(125, 211, 252, 0.22), transparent 60%),
    radial-gradient(800px 480px at 90% 0%, rgba(167, 139, 250, 0.18), transparent 55%),
    radial-gradient(700px 500px at 50% 110%, rgba(56, 189, 248, 0.1), transparent 50%),
    var(--bg);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.05;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.25), rgba(167, 139, 250, 0.25));
  border: 1px solid var(--card-border);
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--text);
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1rem 1.5rem 4rem;
}

.hero {
  padding: 4.5rem 0 3.5rem;
  animation: rise 0.7s ease both;
}

.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-family: var(--display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 36rem;
  margin: 0 0 2rem;
  color: var(--muted);
  font-size: 1.125rem;
}

.lede a {
  color: var(--text);
  border-bottom: 1px solid rgba(125, 211, 252, 0.45);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.lede a:hover,
.lede a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #7dd3fc, #a78bfa);
  color: #0b1020;
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, filter 0.2s ease;
}

.cta:hover,
.cta:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.about {
  padding: 2rem 0 3rem;
  animation: rise 0.7s ease 0.1s both;
}

.about h2,
.projects h2 {
  margin: 0 0 0.75rem;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 400;
}

.about p {
  max-width: 40rem;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.section-head {
  margin-bottom: 1.5rem;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.4rem 1.35rem 1.25rem;
  border-radius: var(--radius);
  background: var(--bg-elev);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  animation: rise 0.7s ease both;
}

.card:nth-child(1) { animation-delay: 0.12s; }
.card:nth-child(2) { animation-delay: 0.18s; }
.card:nth-child(3) { animation-delay: 0.24s; }
.card:nth-child(4) { animation-delay: 0.3s; }

.card:hover,
.card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(125, 211, 252, 0.35);
  background: rgba(24, 32, 58, 0.85);
  outline: none;
}

.card-tag {
  width: fit-content;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(125, 211, 252, 0.12);
}

.card h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

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

.card-link {
  margin-top: 0.5rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent);
}

.site-footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--card-border);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 720px) {
  .hero {
    padding-top: 3rem;
  }

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

  nav {
    gap: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero, .about, .card, .cta {
    animation: none;
    transition: none;
  }
}