* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --bg: #0b1114;
  --panel: #121b1f;
  --line: #263940;
  --text: #f0f7f6;
  --muted: #9cafad;
  --study: #42d7a3;
  --count: #ff8fb1;
  --game: #f3b44b;
  --accent: #7db7ff;
}

body {
  margin: 0;
  min-height: 100svh;
  background:
    radial-gradient(circle at 18% 0%, rgba(66, 215, 163, 0.16), transparent 28rem),
    linear-gradient(180deg, #0e1918 0%, var(--bg) 48%);
  color: var(--text);
  font-family: Consolas, "Noto Sans KR", "Segoe UI", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

main {
  width: min(940px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 34px 0 42px;
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.mark {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(125, 183, 255, 0.58);
  border-radius: 10px;
  background: rgba(125, 183, 255, 0.1);
  color: var(--accent);
  font-size: 30px;
  font-weight: 900;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 8vw, 64px);
  line-height: 0.95;
  letter-spacing: 0;
}

.sub {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.card {
  display: grid;
  gap: 10px;
  min-height: 178px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(18, 27, 31, 0.92);
}

.card .icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 18px;
  font-weight: 900;
}

.card strong {
  font-size: 22px;
  line-height: 1.1;
}

.card span:last-child {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.study {
  color: var(--study);
  border-color: rgba(66, 215, 163, 0.42);
}

.count {
  color: var(--count);
  border-color: rgba(255, 143, 177, 0.42);
}

.game {
  color: var(--game);
  border-color: rgba(243, 180, 75, 0.42);
}

@media (max-width: 760px) {
  main {
    width: min(440px, calc(100vw - 22px));
    padding-top: 22px;
  }

  header {
    align-items: flex-start;
  }

  .mark {
    width: 48px;
    height: 48px;
    font-size: 25px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 138px;
  }
}