:root {
  --green-dark: #2f6d3a;
  --green: #4c9a5b;
  --green-light: #e8f5e9;
  --yellow: #ffd54f;
  --orange: #ff9800;
  --orange-dark: #e67e22;
  --white: #ffffff;
  --text-dark: #2b3a2f;
  --text-muted: #6b7a6f;
  --shadow: 0 8px 24px rgba(47, 109, 58, 0.12);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(180deg, #f3faf1 0%, #fffdf5 45%, #fff8ec 100%);
  color: var(--text-dark);
  min-height: 100vh;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.hero {
  text-align: center;
  padding: 24px 0 12px;
}

.hero-logo {
  width: 140px;
  height: auto;
  margin-bottom: 12px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 30px;
  color: var(--green-dark);
  letter-spacing: 1px;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
  margin-top: 24px;
  border: 1px solid #eef3ec;
}

.input-section label {
  display: block;
  font-weight: 700;
  font-size: 16px;
  color: var(--green-dark);
  margin-bottom: 6px;
}

.hint {
  margin: 4px 0;
  font-size: 13.5px;
  color: var(--text-muted);
}

.hint strong {
  color: var(--orange-dark);
}

.hint-range {
  margin-bottom: 16px;
}

.input-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

#birthday {
  flex: 1 1 220px;
  min-width: 0;
  padding: 14px 16px;
  font-size: 20px;
  letter-spacing: 2px;
  border: 2px solid #d9ead9;
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  background: #fbfffb;
}

#birthday:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(76, 154, 91, 0.18);
}

.btn {
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  padding: 14px 22px;
  transition: transform 0.1s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white);
  box-shadow: 0 6px 16px rgba(255, 152, 0, 0.35);
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  background: var(--green-light);
  color: var(--green-dark);
  border: 2px solid var(--green);
}

.btn-secondary:hover {
  background: #dcf1de;
}

.error-msg {
  margin-top: 12px;
  color: #d84315;
  background: #fff3e0;
  border: 1px solid #ffccbc;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
}

.result-section {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 2px dashed #e2ede1;
}

.result-date-badge {
  display: inline-block;
  background: var(--yellow);
  color: #6b4a00;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
  margin-bottom: 16px;
}

.result-block {
  border-radius: 12px;
  padding: 18px 18px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.result-block h2 {
  margin: 0 0 8px;
  font-size: 17px;
}

.result-block p {
  margin: 0;
  font-size: 15.5px;
  white-space: pre-wrap;
  word-break: break-word;
}

.talent-block {
  background: var(--green-light);
  border: 1px solid #cfe8d1;
}

.talent-block h2 {
  color: var(--green-dark);
}

.challenge-block {
  background: #fff8e1;
  border: 1px solid #ffe0b2;
}

.challenge-block h2 {
  color: var(--orange-dark);
}

.action-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.copy-toast {
  color: var(--green-dark);
  font-weight: 700;
  font-size: 14px;
}

.site-footer {
  text-align: center;
  margin-top: 32px;
  color: var(--text-muted);
  font-size: 13px;
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 24px;
  }
  .card {
    padding: 20px 16px;
  }
  .input-row {
    flex-direction: column;
  }
  #birthday {
    flex: none;
    width: 100%;
  }
  .btn-primary {
    width: 100%;
  }
}