html, body, main, header, footer {
  padding: 0px;
  margin: 0px;
}

#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px;
}

#app-title {
  text-align: center;
  font-size: 26px;
  color: #1a3a6b;
  margin-bottom: 24px;
}

#calculator-form {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 24px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  color: #333;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  height: 44px;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  padding: 0 12px;
  font-size: 16px;
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#button-group {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.btn-primary {
  flex: 1;
  height: 44px;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  flex: 1;
  height: 44px;
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: #e2e8f0;
}

#result-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-card {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  padding: 20px 24px;
}

.result-card:nth-child(1) {
  border-left: 4px solid #2563eb;
}

.result-card:nth-child(2) {
  border-left: 4px solid #16a34a;
}

.result-card:nth-child(3) {
  border-left: 4px solid #d97706;
}

.result-title {
  font-size: 18px;
  color: #1a3a6b;
  margin: 0 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid #f1f5f9;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.result-label {
  font-size: 14px;
  color: #64748b;
}

.result-value {
  font-size: 18px;
  font-weight: 600;
  color: #1e293b;
}

#__fork {
  text-align: center;
  margin: 24px 0;
}

#__fork button {
  background: transparent;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  padding: 8px 24px;
  font-size: 14px;
  color: #64748b;
  cursor: pointer;
  transition: all 0.2s;
}

#__fork button:hover {
  background: #f1f5f9;
  color: #475569;
}

#features, #scenarios, #FAQ {
  max-width: 720px;
  margin: 0 auto 32px;
  padding: 0 16px;
}

#features h2, #scenarios h2, #FAQ h2 {
  font-size: 20px;
  color: #1a3a6b;
  margin-bottom: 12px;
}

#features p {
  font-size: 15px;
  color: #475569;
  line-height: 1.8;
}

#scenarios ul {
  padding-left: 20px;
}

#scenarios li {
  font-size: 15px;
  color: #475569;
  line-height: 1.8;
  margin-bottom: 4px;
}

#FAQ dl {
  margin: 0;
}

#FAQ dt {
  font-size: 15px;
  font-weight: 600;
  color: #1e293b;
  margin-top: 16px;
  margin-bottom: 4px;
}

#FAQ dd {
  font-size: 14px;
  color: #64748b;
  line-height: 1.7;
  margin: 0 0 8px 0;
}

footer {
  text-align: center;
  padding: 20px 16px;
}

.page-info {
  font-size: 13px;
  color: #94a3b8;
}

.page-info a {
  color: #2563eb;
  text-decoration: none;
}

.page-info a:hover {
  text-decoration: underline;
}

@media (max-width: 480px) {
  #app {
    padding: 16px 12px;
  }

  #calculator-form {
    padding: 16px;
  }

  #button-group {
    flex-direction: column;
  }

  .result-value {
    font-size: 16px;
  }
}