:root {
  --font-body: 'Segoe UI', sans-serif;
  --transition-speed: 0.08s;

  /* Light theme */
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --nav-bg: #f8f8f8;
  --link-color: #0366d6;
  --footer-bg: #f0f0f0;
}

[data-theme="dark"] {
  --bg-color: #1e1e1e;
  --text-color: #e0e0e0;
  --nav-bg: #2c2c2c;
  --link-color: #58a6ff;
  --footer-bg: #2a2a2a;
}

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

html, body {
  height: 100%;
  width: 100%;
}

body {
  display: grid;
  align-self: stretch;
  grid-template-rows: auto 1fr auto;
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
  line-height: 1.6;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav-bg);
  border-bottom: 1px solid #ccc;
  padding: 1rem;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: bold;
}

.navbar ul {
  list-style: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* .nav-links {
  display: grid;
  grid-template-columns: repeat(3, auto) 1fr auto;
} */

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
}

/* Content */
.content {
  overflow-y: auto;
  margin: 1rem;
}

#theme-toggle {
  cursor: pointer;
  background: none;
  border: 1px solid var(--text-color);
  border-radius: 3px;
  padding: 0.5rem;
  font-size: 1.2rem;
  color: var(--text-color);
  transition: color var(--transition-speed);
}

/* Footer */
.footer {
  display: flex;
  gap: 2rem;
  justify-content: center;
  align-items: center;
  background: var(--footer-bg);
  font-size: 0.9rem;
  border-top: 1px solid #ccc;
  padding: 0.8rem;
}

/* Responsive */
@media (max-width: 650px) {
  /* .nav-links {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
  } */

  .content {
    padding: 0 0.75rem;
  }

}