* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Microsoft JhengHei", sans-serif;
  background: linear-gradient(180deg, #f7f3ea 0%, #ffffff 100%);
  color: #2f2a24;
  line-height: 1.8;
}

.hero {
  padding: 72px 20px 56px;
  text-align: center;
  background: linear-gradient(135deg, #f3d9b1 0%, #f8efe1 100%);
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: #fff;
  color: #8a5a2b;
  font-size: 14px;
  margin: 0 0 16px;
}

.hero h1 {
  margin: 0;
  font-size: 2.4rem;
}

.hero-text {
  max-width: 640px;
  margin: 16px auto 0;
}

.btn,
button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  border: none;
  border-radius: 999px;
  background: #8a5a2b;
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  cursor: pointer;
}

.btn-light {
  background: #f2e6d4;
  color: #7b4c1d;
}

main {
  width: min(1000px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.promo {
  margin-bottom: 32px;
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(135deg, #fff7e8 0%, #fff 100%);
  border: 1px solid rgba(138, 90, 43, 0.12);
  box-shadow: 0 12px 30px rgba(138, 90, 43, 0.08);
}

.promo-badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #f3d9b1;
  color: #7b4c1d;
  font-size: 14px;
}

.promo h2 {
  margin: 0;
  font-size: 2rem;
}

.promo-text {
  margin: 12px 0 0;
  max-width: 700px;
}

.promo-info {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin-top: 20px;
}

.promo-item {
  padding: 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(138, 90, 43, 0.08);
}

.promo-item span {
  display: block;
  margin-bottom: 6px;
  color: #8b7a69;
  font-size: 14px;
}

.promo-item strong {
  font-size: 18px;
}

.promo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.promo-tags span {
  padding: 8px 14px;
  border-radius: 999px;
  background: #f9efe1;
  color: #8a5a2b;
  font-size: 14px;
}

.promo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.card-grid,
.book-list {
  display: grid;
  gap: 16px;
}

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 32px;
}

.card,
.book-item,
.daily {
  background: #fff;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(138, 90, 43, 0.08);
}

.book-section {
  margin-bottom: 32px;
}

.book-list {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.book-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 14px;
  margin-bottom: 14px;
}

.daily {
  text-align: center;
}

.register {
  margin-top: 32px;
  padding: 28px;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(138, 90, 43, 0.08);
}

.register-text {
  margin-top: 8px;
}

.activity-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.activity-card {
  padding: 16px;
  border-radius: 18px;
  background: #fff7ee;
  border: 1px solid rgba(138, 90, 43, 0.12);
}

.activity-card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.activity-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
  font-size: 14px;
  color: #7a6a5c;
}

.activity-meta span {
  padding: 6px 10px;
  border-radius: 999px;
  background: #fff;
}

.register-form {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.register-form label {
  display: grid;
  gap: 8px;
  text-align: left;
  font-weight: 600;
}

.register-form input,
.register-form select,
.register-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #ddcfbf;
  border-radius: 14px;
  font: inherit;
  background: #fffdf9;
  color: #2f2a24;
}

.register-form input::placeholder,
.register-form textarea::placeholder {
  color: #a18f7c;
}

.register-form input:focus,
.register-form select:focus,
.register-form textarea:focus {
  outline: 2px solid rgba(138, 90, 43, 0.25);
  border-color: #8a5a2b;
}

.register-form button {
  justify-self: start;
}

.register-message {
  min-height: 1.5em;
  margin-top: 14px;
  font-weight: 600;
}

footer {
  padding: 24px 20px 40px;
  text-align: center;
  color: #7a6a5c;
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.9rem;
  }

  .promo {
    padding: 20px;
  }

  .promo h2 {
    font-size: 1.6rem;
  }

  .register {
    padding: 20px;
  }
}