:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --border: #334155;
  --radius: 8px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 720px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.5rem;
}

/* ---- Layout ---- */

main {
  width: 100%;
  max-width: var(--max-width);
}

/* ---- Hero / Profile ---- */

.profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-bottom: 3rem;
}

.avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  transition: border-color 0.3s ease;
}

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

.profile-info {
  text-align: center;
}

.profile-info h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

/* ---- Social Links ---- */

.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.social-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.social-links svg {
  width: 20px;
  height: 20px;
}

/* ---- Bio ---- */

.bio {
  margin-bottom: 3rem;
}

.bio p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.bio p:last-child {
  margin-bottom: 0;
}

.bio strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---- Hobbies ---- */

.hobbies {
  margin-bottom: 3rem;
}

.hobbies h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.hobby-grid {
  display: grid;
  gap: 1rem;
}

.hobby-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color 0.2s ease;
}

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

.hobby-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-top: 2px;
}

.hobby-icon svg {
  width: 24px;
  height: 24px;
}

.hobby-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.hobby-content p {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.6;
}

/* ---- Footer ---- */

footer {
  margin-top: auto;
  padding-top: 3rem;
  width: 100%;
  max-width: var(--max-width);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ---- Responsive ---- */

@media (min-width: 640px) {
  .profile {
    flex-direction: row;
    align-items: center;
    text-align: left;
  }

  .profile-info {
    text-align: left;
  }

  .social-links {
    justify-content: flex-start;
  }

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