:root {
  --ink: #1b1b1f;
  --ink-subtle: #6b6e76;
  --line: #e6e7ea;
  --bg: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.5 'Noto Sans KR', system-ui, sans-serif;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
}

.top {
  padding: 56px 16px 32px;
  text-align: center;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font: 400 44px/1 'Jua', sans-serif;
  letter-spacing: -0.5px;
}

/* The penguin's skill animation: 9 frames of 160px, side by side in one sheet. */
.mascot {
  --s: 80px;
  width: var(--s);
  height: var(--s);
  margin: -8px -4px -8px -12px;
  background: url(img/penguin-skill.png) 0 0 / calc(var(--s) * 9) var(--s) no-repeat;
  image-rendering: pixelated;
  animation: skill 1.2s steps(9) infinite;
}

@keyframes skill {
  to { background-position-x: calc(var(--s) * -9); }
}

@media (prefers-reduced-motion: reduce) {
  .mascot { animation: none; }
}

.tagline {
  margin: 12px 0 0;
  color: var(--ink-subtle);
  font-size: 17px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 240px));
  justify-content: center;
  gap: 28px 20px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 8px 16px 48px;
}

.card {
  display: block;
  color: inherit;
  text-decoration: none;
  text-align: center;
}

.card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  border-radius: 20px;
  border: 1px solid var(--line);
  box-shadow: 0 2px 0 var(--line);
  transition: transform 0.15s ease;
}

.card:hover img,
.card:focus-visible img { transform: translateY(-4px) rotate(-1.5deg); }

.card:active img { transform: scale(0.97); }

.card h2 {
  margin: 12px 0 2px;
  font: 400 22px/1.3 'Jua', sans-serif;
}

.card p {
  margin: 0;
  color: var(--ink-subtle);
  font-size: 15px;
}

.bottom {
  padding: 24px 16px calc(24px + env(safe-area-inset-bottom));
  text-align: center;
  color: var(--ink-subtle);
  font-size: 14px;
}

@media (max-width: 480px) {
  .top { padding-top: 40px; }
  .logo { font-size: 36px; }
  .mascot { --s: 64px; }
}

.bottom a { color: inherit; }