/* ---------- Tokens ---------- */
:root {
  --bg: #0a0e14;
  --bg-alt: #0d1219;
  --surface: #131922;
  --border: #232b36;
  --text: #e6edf3;
  --text-dim: #8b97a6;
  --accent: #39ff9c;
  --accent-soft: rgba(57, 255, 156, 0.12);
  --accent-2: #58a6ff;
  --accent-2-soft: rgba(88, 166, 255, 0.12);
  --radius: 12px;
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, monospace;
  --container: 1080px;
}

/* ---------- Reset ---------- */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.5em;
}

p {
  margin: 0 0 1em;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #04140c;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  font-weight: 600;
  z-index: 200;
}

.skip-link:focus {
  left: 0;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 20, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--text);
}

.logo .cursor {
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

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

.nav-links .nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 18px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.nav-links .nav-cta:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 18px;
  margin: 0 auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  padding: 120px 0 96px;
  background:
    radial-gradient(circle at 18% 20%, var(--accent-soft), transparent 45%),
    radial-gradient(circle at 82% 0%, var(--accent-2-soft), transparent 40%);
}

.hero-inner {
  max-width: 720px;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  letter-spacing: -0.02em;
}

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

.accent-alt {
  color: var(--accent-2);
}

.lead {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 28px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #04140c;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -10px rgba(57, 255, 156, 0.5);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* ---------- Sections ---------- */
.section {
  padding: 96px 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  display: flex;
  align-items: center;
  gap: 14px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  background: var(--surface);
}

.section-intro {
  color: var(--text-dim);
  max-width: 620px;
  font-size: 1.05rem;
}

.section-intro em {
  color: var(--text-dim);
  font-style: normal;
  border-bottom: 1px dashed var(--border);
}

/* ---------- Work / project cards ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-2);
  box-shadow: 0 20px 40px -24px rgba(0, 0, 0, 0.6);
}

.project-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-2-soft));
  color: var(--text);
  font-family: var(--font-mono);
  font-weight: 700;
  margin-bottom: 18px;
}

.badges {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.badge-android {
  color: var(--accent);
  border-color: rgba(57, 255, 156, 0.35);
  background: var(--accent-soft);
}

.badge-linux {
  color: var(--accent-2);
  border-color: rgba(88, 166, 255, 0.35);
  background: var(--accent-2-soft);
}

.project-card h3 {
  font-size: 1.2rem;
}

.project-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

.project-links {
  display: flex;
  gap: 20px;
  margin-top: 12px;
}

.project-links a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.project-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
}

.about-copy p {
  color: var(--text-dim);
  font-size: 1.02rem;
  max-width: 600px;
}

.about-stack h3 {
  font-size: 1.05rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
  margin-bottom: 18px;
}

.stack-list li {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.stack-list li::before {
  content: '▹';
  color: var(--accent);
}

/* ---------- Contact ---------- */
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent);
  margin: 12px 0 28px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.contact-email:hover {
  border-color: var(--accent);
}

.contact-email .icon {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

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

.social-links .icon {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-note {
  font-family: var(--font-mono);
}

.footer-inner p {
  margin: 0;
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    height: calc(100vh - 72px);
    z-index: 90;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 16px 24px;
    width: 100%;
    border-bottom: 1px solid var(--border);
  }

  .nav-links .nav-cta {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero {
    padding: 96px 0 64px;
  }
}

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

  .reveal,
  .logo .cursor,
  .btn,
  .project-card {
    transition: none;
    animation: none;
    opacity: 1;
    transform: none;
  }
}