.feedback-document {
  margin: 0;
  min-height: 100vh;
  background: #ffffff;
  color: #1e293b;
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.feedback-page-header {
  height: 64px;
  border-bottom: 1px solid #e2e8f0;
}

.feedback-page-header-inner {
  box-sizing: border-box;
  max-width: 1200px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feedback-page-logo,
.feedback-page-nav,
.feedback-button {
  text-decoration: none;
}

.feedback-page-logo {
  color: #1e293b;
  font-size: 18px;
  font-weight: 700;
}

.feedback-page-nav {
  color: #52525b;
  font-size: 14px;
  font-weight: 500;
}

.feedback-page-main {
  box-sizing: border-box;
  min-height: calc(100vh - 64px);
  padding: 48px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feedback-card {
  box-sizing: border-box;
  width: 100%;
  max-width: 520px;
  padding: 48px;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  background: #ffffff;
  text-align: center;
}

.feedback-icon {
  margin-bottom: 16px;
  font-size: 56px;
  line-height: 1;
}

.feedback-card h1 {
  margin: 0 0 12px;
  color: #1e293b;
  font-size: 22px;
  font-weight: 700;
}

.feedback-error-message {
  display: inline-block;
  margin-bottom: 24px;
  padding: 10px 16px;
  border-radius: 8px;
  background: #fef2f2;
  color: #dc2626;
  font-size: 14px;
  word-break: break-word;
}

.feedback-card p {
  margin: 0 0 24px;
  color: #52525b;
  font-size: 15px;
}

.feedback-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.feedback-button {
  box-sizing: border-box;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.feedback-button-primary {
  background: #ea580c;
  color: #ffffff;
}

.feedback-button-primary:hover {
  background: #c2410c;
}

.feedback-button-outline {
  border-color: #e2e8f0;
  background: #ffffff;
  color: #1e293b;
}

.feedback-button-outline:hover {
  background: #f6f8fb;
}

@media (max-width: 640px) {
  .feedback-card {
    padding: 36px 24px;
  }

  .feedback-actions {
    flex-direction: column;
  }

  .feedback-actions .feedback-button {
    width: 100%;
  }
}