:root {
  --bg: #020617;
  --card: #111827;
  --accent: #38bdf8;
  --text: #e5e7eb;
  --sub: #94a3b8;
}

.light {
  --bg: #f8fafc;
  --card: #ffffff;
  --accent: #0284c7;
  --text: #020617;
  --sub: #475569;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Inter, system-ui;
}

body {
  background: var(--bg);
  color: var(--text);
  transition: 0.25s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1000px;
  margin: auto;
  padding: 2rem;
  flex: 1;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

h1 {
  font-size: 2.5rem;
}

.tag {
  color: var(--accent);
  margin-top: 0.5rem;
}

footer {
  text-align: center;
  margin-top: auto;
  color: var(--sub);
  font-size: 0.85rem;
  padding: 1rem;
}

/* Theme Toggle */
#themeToggle {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 46px;
  height: 26px;
  border-radius: 20px;
  border: none;
  cursor: pointer;
  background: var(--card);
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

#themeToggle::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  top: 4px;
  left: 4px;
  transition: 0.25s;
}

.light #themeToggle::after {
  left: 24px;
}