:root {
  color-scheme: dark;
  --bg: #020617;
  --panel: rgba(11, 18, 36, 0.6);
  --accent: #6ee7b7;
  --accent-2: #7dd3fc;
  --text: #f8fafc;
  --muted: rgba(248, 250, 252, 0.65);
  --glow: rgba(110, 231, 183, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Noto Sans TC', 'Inter', system-ui, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(125, 211, 252, 0.3), transparent 45%),
    radial-gradient(circle at 80% 0%, rgba(110, 231, 183, 0.25), transparent 40%),
    #020617;
  color: var(--text);
}

main {
  padding: clamp(2rem, 3vw, 3.5rem);
}

header {
  max-width: 960px;
  margin: 0 auto 2rem;
  text-align: center;
  position: relative;
}

header h1 {
  font-size: clamp(2.8rem, 4vw, 3.8rem);
  margin: 0.3rem 0;
  letter-spacing: 0.04em;
}

header p {
  color: var(--muted);
  margin: 0;
  line-height: 1.7;
}

header::after {
  content: 'GAME.BUILD.DAILY';
  position: absolute;
  bottom: -0.5rem;
  right: 50%;
  transform: translateX(50%);
  font-size: 0.75rem;
  letter-spacing: 0.5em;
  color: rgba(255, 255, 255, 0.2);
}

section {
  max-width: 1100px;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 220px;
  box-shadow: inset 0 0 25px rgba(255, 255, 255, 0.04), 0 25px 90px rgba(2, 6, 23, 0.9);
  overflow: hidden;
  position: relative;
  isolation: isolate;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.card-link {
  color: inherit;
  text-decoration: none;
  justify-content: space-between;
}

.card-link span {
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(248, 250, 252, 0.7);
}

.card-link .tag {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
}

.card::before,
.card::after {
  content: '';
  position: absolute;
  inset: 20px;
  border-radius: 20px;
  border: 1px solid transparent;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.card::before {
  border-image: linear-gradient(120deg, rgba(110, 231, 183, 0), var(--glow), rgba(125, 211, 252, 0)) 1;
}

.card::after {
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
}

.card:hover::before,
.card:hover::after {
  opacity: 1;
}

.card h3 {
  margin: 0;
  font-size: 1.5rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.card a {
  align-self: flex-start;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #020617;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 10px 35px rgba(110, 231, 183, 0.4);
}

footer {
  margin-top: 3rem;
  padding: 1rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .card {
    min-height: 200px;
  }
}