*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Happy Monkey', 'Segoe UI', system-ui, sans-serif;
  background: linear-gradient(160deg, #e8f4fd 0%, #c9e8f7 40%, #daeef8 100%);
  background-attachment: fixed;
  color: #1a2a3a;
  min-height: 100vh;
}

/* ── Header / Logo ── */

header {
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: center;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.logo img {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 12px rgba(30, 100, 160, 0.18);
}

.logo-text {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #1a3a5c;
}

.logo-text span {
  color: #4aa8d8;
  font-weight: 400;
}

/* ── Main ── */

main {
  max-width: 960px;
  margin: 3.5rem auto;
  padding: 0 1.5rem;
}

/* ── Cards ── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 16px rgba(30, 90, 150, 0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s, transform 0.2s;
  cursor: pointer;
}

.card:hover {
  box-shadow: 0 10px 32px rgba(30, 90, 150, 0.18);
  transform: translateY(-3px);
}

.card-tag {
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #4aa8d8;
  padding: 1.1rem 1.3rem 0;
}

.card-body {
  padding: 0.55rem 1.3rem 1.3rem;
  flex: 1;
}

.card-body h2 {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
  color: #1a2a3a;
}

/* ── Mobile ── */

@media (max-width: 640px) {
  main {
    margin: 1.5rem auto;
  }

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