:root {
  --primary: #e0f6ff;    /* airy light blue */
  --accent:  #2a7db8;    /* deep sky */
  --text:    #033649;    /* dark teal */
}

html, body {
  height: 100%;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--primary);
}

.sidebar {
  background: #ffffff;
  width: 280px;
  padding: 2rem;
  box-shadow: 2px 0 8px rgba(0,0,0,.08);
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  overflow-y: auto;
}

.avatar {
  width: 120px;
  height: 120px;
  background: var(--accent);
  border-radius: 50%;
  margin: 0 auto 1.2rem;
}

.bio {
  font-size: 0.9rem;
  line-height: 1.4;
}

.contact {
  list-style: none;
  padding: 0;
  font-size: 0.85rem;
}

.contact li {
  margin: 0.5rem 0;
}

.contact a {
  color: var(--accent);
  text-decoration: none;
}

.contact a:hover {
  text-decoration: underline;
}

.content {
  margin-left: 280px;
  padding: 4rem 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}

.buttons {
  margin-top: 2.5rem;
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.btn {
  padding: 0.9rem 2rem;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease;
}

.btn:hover {
  background: #1b5c87;
}

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn.secondary:hover {
  background: var(--accent);
  color: #ffffff;
}

@media (max-width: 768px) {
  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    box-shadow: none;
    text-align: center;
  }

  .content {
    margin-left: 0;
    padding: 2rem 1rem;
  }
}