:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-border: #2a2d3a;
  --color-text: #e4e4e7;
  --color-text-muted: #9ca3af;
  --color-accent: #6366f1;
  --color-accent-hover: #818cf8;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Hero */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 3rem;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 1.25rem;
  color: var(--color-accent);
  margin-top: 0.5rem;
}

.blurb {
  color: var(--color-text-muted);
  margin-top: 1rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.links a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: border-color 0.2s, color 0.2s;
}

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

/* Projects */
main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  width: 100%;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.projects {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .projects {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

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

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

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

.video-placeholder {
  margin: 1rem 0;
  padding: 3rem 1rem;
  background: var(--color-bg);
  border-radius: 8px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.tech-stack {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tech-stack li {
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--color-border);
}

.card-link {
  display: inline-block;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.card-link:hover {
  color: var(--color-accent-hover);
}

.badge {
  display: inline-block;
  background: var(--color-accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--color-border);
}