:root {
  --black: #111;
  --dark: #222;
  --grey: #333;
  --white: #FFF;
  --light: #EEE;
  --cyan-dark: #048;
  --cyan: #08F;
  --magenta-dark: #408;
  --magenta: #80F;
  --yellow-dark: #840;
  --yellow: #F80;
  color-scheme: dark light;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--dark);
  color: var(--yellow);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100vh;
  background-color: var(--dark);
  color: var(--yellow);
}

.container {
  margin: 0 auto;
  max-width: 500px;
  padding: 1rem;
}

.grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  justify-content: center;
}

@media (min-width: 768px) {
  .grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .grid {
    gap: 1.5rem;
    grid-template-columns: 1fr 1fr 1fr;
  }
}

section {
  background: var(--black);
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 1rem;
}

h1, h2, h3 {
  font-weight: 600;
  margin: 0;
  text-align: center;
}

h1 {
  color: var(--magenta);
  font-size: 2rem;
  margin: 1rem 0;
}

h2 {
  color: var(--magenta-dark);
  font-size: 1.5rem;
  margin: 1rem 0;
}

h3 {
  color: var(--cyan);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.button-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(4, 1fr);
}

.spacer {
  background: var(--black);
  visibility: hidden;
  pointer-events: none;
  cursor: default;
  text-decoration: none;
  min-height: 60px§;
}

hr {
  background: var(--grey);
  height: 2px;
  border: none;
}

.button-grid a {
  align-items: center;
  aspect-ratio: 1;
  background: var(--grey);
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--yellow);
  display: flex;
  font-size: 0.8rem;
  font-weight: 500;
  justify-content: center;
  min-height: 60px;
  text-align: center;
  text-decoration: none;
  transition: all 0.2s ease;
}

.button-grid a:active {
  background: var(--cyan);
  color: var(--white);
  transform: scale(0.95);
}

@media (hover: hover) {
  .button-grid a:hover {
    background: var(--cyan);
    color: var(--white);
    transform: scale(1.2);
  }
}