:root {
  --bg:    #f5f7ff;
  --ink:   #1a1333;
  --muted: #6b7fa6;

  --lime:  #4f8cff;   /* primary accent (blue) */
  --plum:  #a855f7;   /* secondary (purple) */
  --sun:   #7f5af0;   /* tertiary (violet/blue-purple) */
}


body.dark {
  --bg:    #1a1333;
  --ink:   #e0e7ff;
  --muted: #a3aed6;
}


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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  transition: background 0.2s, color 0.2s;
  -webkit-font-smoothing: antialiased;
}


h1, h2, h3 {
  font-family: 'Syne', system-ui, sans-serif;
  letter-spacing: -0.02em;
  line-height: 1.15;
}


.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 1.2rem 2rem;
  border-bottom: 2px solid var(--ink);
}
.brand {
  font-weight: 800;
  font-size: 1.2rem;
  font-family: 'Syne', system-ui, sans-serif;
  white-space: nowrap;
}
.site-header nav { display: flex; gap: 1.4rem; }
.site-header nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}
.site-header nav a:hover { color: var(--lime); }


.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-family: 'Syne', system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.55em 1em;
  background: var(--bg);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: 10px;
  box-shadow: 3px 3px 0 var(--ink);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.1s, box-shadow 0.1s;
}
.chip:hover  { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--lime); }
.chip:active { transform: translate(1px, 1px);   box-shadow: 1px 1px 0 var(--ink); }

.chip.lime { background: var(--lime); color: var(--ink); }
.chip.plum { background: var(--plum); color: var(--bg); }
.chip.sun  { background: var(--sun);  color: var(--ink); }

.chip.active {
  background: var(--lime);
  color: var(--ink);
}


main { max-width: 960px; margin: 0 auto; padding: 2rem; }


.hero { padding: 3rem 0 2rem; text-align: center; }
.hero .eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 0.3rem 0.7rem;
  background: var(--sun);
  border: 2px solid var(--ink);
  border-radius: 6px;
  margin-bottom: 1rem;
  box-shadow: 3px 3px 0 var(--ink);
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 800;
}
.hero .accent { color: var(--lime); }
.hero .tagline {
  color: var(--muted);
  font-size: 1.1rem;
  margin-top: 0.5rem;
}
.hero .bio {
  max-width: 620px;
  margin: 1rem auto 0;
  color: var(--muted);
  line-height: 1.6;
}


#projects { padding: 2rem 0; }

.projects-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
}
.projects-header h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
.projects-header .count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--muted);
}


.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.4rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}


.project-card {
  background: var(--bg);
  border: 2px solid var(--ink);
  border-radius: 14px;
  padding: 1.2rem;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 0.15s, box-shadow 0.15s;
}
.project-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--plum);
}
.project-card .category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.2rem 0.5rem;
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  background: var(--sun);
  margin-bottom: 0.6rem;
  color: var(--ink);
}
.project-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}
.project-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}


.project-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.8rem;
}
.project-card .tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  background: var(--plum);
  color: var(--bg);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.project-links .chip {
  margin-top: 0;
}

.project-card .project-link {
  margin-top: 0.8rem;
}


.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  border: 2px dashed var(--muted);
  border-radius: 14px;
}


.contact {
  margin-top: 3rem;
  padding: 2rem;
  background: var(--lime);
  border: 2px solid var(--ink);
  border-radius: 14px;
  box-shadow: 6px 6px 0 var(--ink);
  color: var(--ink);
}
.contact h2 { margin-bottom: 0.5rem; }
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}
.contact-note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: rgba(15, 23, 42, 0.7);
}
.contact code {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg);
  border: 1.5px solid var(--ink);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}


.site-footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  border-top: 2px dashed var(--muted);
  margin-top: 3rem;
}
.site-footer .footer-meta {
  font-size: 0.85rem;
  margin-top: 0.3rem;
}

@media (max-width: 700px) {
  .site-header {
    padding: 1rem;
    align-items: center;
  }

  .site-header nav {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 1rem;
  }

  #theme-btn {
    order: 2;
    margin-left: auto;
    padding: 0.45rem 0.7rem;
  }

  .brand {
    order: 1;
    font-size: 1.05rem;
  }

  main {
    padding: 1.25rem;
  }

  .contact {
    padding: 1.2rem;
  }
}

@media (max-width: 420px) {
  .site-header nav {
    gap: 0.7rem;
  }

  .site-header nav a {
    font-size: 0.92rem;
  }

  .chip {
    font-size: 0.88rem;
  }
}