:root {
  --bg: #0b0f17;
  --surface: #121826;
  --surface-2: #172033;
  --border: #1f2937;
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --accent: #22d3ee;
  --accent-strong: #06b6d4;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-strong);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 23, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav__brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  font-size: 1.1rem;
}

.nav__links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav__links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text);
}

.nav__links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 64px;
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  inset: -20% 20% auto 20%;
  height: 500px;
  background: radial-gradient(
    closest-side,
    rgba(34, 211, 238, 0.18),
    transparent 70%
  );
  pointer-events: none;
  filter: blur(20px);
}

.hero__eyebrow {
  color: var(--accent);
  margin: 0 0 8px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.hero__name {
  font-size: clamp(2.2rem, 5vw + 1rem, 3.6rem);
  line-height: 1.1;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.hero__title {
  font-size: clamp(1.1rem, 1vw + 0.9rem, 1.4rem);
  color: var(--text);
  margin: 0 0 16px;
  font-weight: 500;
}

.hero__tagline {
  color: var(--text-muted);
  max-width: 58ch;
  margin: 0 0 28px;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, color 0.15s ease,
    border-color 0.15s ease;
}

.btn--primary {
  background: var(--accent);
  color: #052028;
  border-color: var(--accent);
}

.btn--primary:hover {
  background: var(--accent-strong);
  color: #052028;
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* Sections */
.section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}

.section__title {
  font-size: 1.6rem;
  margin: 0 0 28px;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
  padding-bottom: 10px;
}

.section__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}

.prose {
  color: var(--text-muted);
  max-width: 66ch;
  margin: 0 0 20px;
}

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

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.skill-group__title {
  margin: 0 0 14px;
  font-size: 1rem;
  color: var(--text);
}

.pills {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pills li {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
}

/* Projects */
.projects {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.project-card__title {
  margin: 0 0 4px;
  font-size: 1.2rem;
}

.project-card__meta {
  margin: 0 0 14px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.project-card__desc {
  margin: 0 0 16px;
  color: var(--text);
}

.project-card__tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-card__tags li {
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid rgba(34, 211, 238, 0.3);
}

/* Contact */
.section--contact .btn {
  margin-top: 4px;
}

/* Footer */
.footer {
  padding: 28px 0 40px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 720px) {
  .hero {
    padding: 64px 0 48px;
  }

  .section {
    padding: 56px 0;
  }

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

  .nav__inner {
    padding: 12px 20px;
  }

  .nav__links {
    gap: 14px;
  }
}