/* 기본 설정 및 리셋 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', 'Malgun Gothic', '맑은 고딕', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333333;
  background-color: #f5f7fa;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 헤더 스타일 */
header {
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.logo {
  height: 40px;
  width: auto;
}

header h1 {
  margin: 0;
  font-size: 1.4rem;
  text-align: center;
  color: #2c6ed0;
}

/* 메인 컨텐츠 */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 2rem 1rem;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

/* 컨테이너 */
.container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* 시작 페이지 */
#start-page {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-bottom: 2rem;
}

#start-page h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: #2c6ed0;
}

#start-page p {
  margin-bottom: 1rem;
  color: #666666;
}

/* 진행 상황 표시기 */
.progress-container {
  margin: 2rem 0;
  text-align: center;
}

.progress-bar {
  height: 10px;
  background-color: #f8f9fa;
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 0.5rem;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2c6ed0, #1a4a9c);
  transition: width 0.3s ease;
  border-radius: 5px;
}

.progress-text {
  font-size: 0.9rem;
  color: #666666;
  margin: 0;
}

/* 질문 섹션 */
.question-section {
  display: none;
  padding: 1.5rem;
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-bottom: 1.5rem;
}

.question-section.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.question-title {
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-weight: 500;
  font-size: 1.1rem;
  color: #333333;
}

/* 입력 필드 */
textarea {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  border: 1px solid #dddddd;
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

textarea:focus {
  outline: none;
  border-color: #2c6ed0;
  box-shadow: 0 0 0 3px rgba(44, 110, 208, 0.1);
}

textarea::placeholder {
  color: #999999;
}

/* 라디오 버튼 그룹 */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.radio-option {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: 0.75rem;
  border: 1px solid #dddddd;
  border-radius: 6px;
  transition: all 0.2s;
}

.radio-option:hover {
  background-color: #f8f9fa;
  border-color: #bbbbbb;
}

.radio-option input[type="radio"] {
  margin-right: 0.75rem;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.radio-label {
  font-size: 1rem;
  cursor: pointer;
  flex: 1;
}

/* 버튼 */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  display: inline-block;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(to bottom, #2c6ed0, #1a4a9c);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(44, 110, 208, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(to bottom, #1a4a9c, #0d306e);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(44, 110, 208, 0.4);
}

.btn-secondary {
  background-color: #f8f9fa;
  color: #333333;
  border: 1px solid #dddddd;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.btn-secondary:hover {
  background-color: #e9ecef;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.navigation-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  gap: 1rem;
}

.navigation-buttons .btn {
  flex: 1;
  padding: 0.875rem;
}

/* 오류 메시지 */
.error-message {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  min-height: 1.2rem;
  display: none;
}

.error-message.show {
  display: block;
}

/* 확인 페이지 */
#review-page {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.review-item {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #dddddd;
}

.review-item:last-child {
  border-bottom: none;
  margin-bottom: 2rem;
}

.review-item h3 {
  margin-top: 0;
  font-size: 1.1rem;
  color: #2c6ed0;
  margin-bottom: 0.5rem;
}

.review-answer {
  margin: 0;
  padding: 0.75rem;
  background-color: #f8f9fa;
  border-radius: 4px;
  white-space: pre-wrap;
  border-left: 3px solid #2c6ed0;
}

/* 완료 페이지 */
#completion-page {
  text-align: center;
  background-color: #ffffff;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.completion-icon {
  font-size: 3rem;
  color: #28a745;
  margin-bottom: 1rem;
  background-color: rgba(40, 167, 69, 0.1);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin: 0 auto 1rem;
}

#completion-page h2 {
  margin-top: 0;
  color: #28a745;
}

.email-instruction {
  background-color: #f8f9fa;
  padding: 1rem;
  border-radius: 6px;
  margin: 1.5rem 0;
  border-left: 3px solid #2c6ed0;
}

/* 푸터 */
footer {
  background-color: #ffffff;
  border-top: 1px solid #dddddd;
  padding: 1.5rem 0;
  margin-top: auto;
}

footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

footer p {
  margin: 0;
  font-size: 0.875rem;
  color: #666666;
}

#privacy-policy {
  color: #2c6ed0;
  text-decoration: none;
  font-size: 0.875rem;
}

#privacy-policy:hover {
  text-decoration: underline;
}

/* 숨김 상태 */
.hidden {
  display: none !important;
}

/* 반응형 디자인 */
@media (max-width: 767px) {
  .container {
    padding: 0 0.75rem;
  }
  
  main {
    padding: 1rem 0.75rem;
  }
  
  #start-page, .question-section, #review-page, #completion-page {
    padding: 1.5rem 1rem;
  }
  
  .question-section {
    padding: 1rem;
  }
  
  textarea {
    min-height: 100px;
  }
  
  .navigation-buttons {
    flex-direction: column;
  }
  
  header h1 {
    font-size: 1.2rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .radio-option {
    padding: 0.5rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .container {
    padding: 0 1.5rem;
  }
  
  header h1 {
    font-size: 1.6rem;
  }
  
  .question-title {
    font-size: 1.2rem;
  }
  
  #start-page, .question-section, #review-page, #completion-page {
    padding: 2rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }
  
  header h1 {
    font-size: 1.8rem;
  }
  
  .question-section {
    padding: 2rem;
  }
  
  .navigation-buttons .btn {
    padding: 1rem 1.5rem;
  }
  
  footer .container {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* 접근성 */
*:focus {
  outline: 2px solid #2c6ed0;
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 인쇄 최적화 */
@media print {
  header, footer, .navigation-buttons, .progress-container {
    display: none;
  }
  
  .question-section {
    page-break-inside: avoid;
    box-shadow: none;
    border: 1px solid #dddddd;
  }
  
  body {
    font-size: 12pt;
    background-color: #ffffff;
  }
  
  main {
    padding: 0;
  }
  
  #review-page, #completion-page {
    box-shadow: none;
    border: 1px solid #dddddd;
  }
}