/* ============================================
   디스크 케어 일지 - 반응형 스타일시트
   모바일 우선, 중장년층 고려 (큰 터치 영역)
   ============================================ */

/* CSS 변수 정의 */
:root {
  /* 주 색상 */
  --primary: #1976D2;
  --primary-dark: #1565C0;
  --primary-light: #BBDEFB;

  /* 경고 색상 */
  --warning: #F57C00;
  --danger: #D32F2F;
  --success: #388E3C;

  /* 배경 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --bg-tertiary: #E3F2FD;

  /* 텍스트 */
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-white: #FFFFFF;

  /* 테두리 */
  --border-color: #E0E0E0;
  --border-radius: 8px;

  /* 그림자 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);

  /* 간격 */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

/* ============================================
   기본 스타일
   ============================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "맑은 고딕", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   메인 레이아웃
   ============================================ */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  min-height: 100vh;
}

/* ============================================
   헤더
   ============================================ */
header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
}

h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.today {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ============================================
   섹션
   ============================================ */
.form-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
}

.form-section h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.section-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.section-desc.important {
  color: var(--warning);
  font-weight: 500;
}

/* ============================================
   폼 요소
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

input[type="date"],
textarea {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s;
}

input[type="date"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
}

textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
  line-height: 1.5;
}

.char-count {
  display: block;
  text-align: right;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ============================================
   슬라이더
   ============================================ */
.slider-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.slider {
  flex: 1;
  height: 12px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right, #4CAF50 0%, #FFC107 50%, #F44336 100%);
  border-radius: 6px;
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 36px;
  height: 36px;
  background: var(--bg-primary);
  border: 3px solid var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider::-webkit-slider-thumb:active {
  transform: scale(0.95);
}

.slider::-moz-range-thumb {
  width: 36px;
  height: 36px;
  background: var(--bg-primary);
  border: 3px solid var(--primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform 0.2s;
}

.slider-value {
  min-width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  background: var(--bg-tertiary);
  border-radius: 50%;
}

/* ============================================
   칩 버튼 (다중 선택)
   ============================================ */
.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.chip {
  min-height: 56px;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 16px;
  font-weight: 500;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  border-radius: 28px;
  cursor: pointer;
  transition: all 0.2s;
  flex: 1 1 calc(50% - 6px);
  min-width: 120px;
}

.chip:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.chip:active {
  transform: translateY(0);
}

.chip.selected {
  background: var(--primary);
  color: var(--text-white);
  border-color: var(--primary);
}

/* ============================================
   라디오 버튼
   ============================================ */
.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.radio-label {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s;
}

.radio-label:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.radio-label input[type="radio"] {
  width: 24px;
  height: 24px;
  margin-right: var(--spacing-md);
  cursor: pointer;
  accent-color: var(--primary);
}

.radio-label span {
  font-size: 16px;
  font-weight: 500;
}

.radio-label input[type="radio"]:checked ~ span {
  color: var(--primary);
  font-weight: 600;
}

.warning-option {
  border-color: var(--warning);
}

.warning-option:hover {
  border-color: var(--warning);
  background: #FFF3E0;
}

/* ============================================
   제출 버튼
   ============================================ */
.submit-section {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.submit-btn {
  width: 100%;
  min-height: 64px;
  padding: var(--spacing-lg);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-white);
  background: var(--primary);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-md);
}

.submit-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.submit-btn:active {
  transform: translateY(0);
}

.submit-btn:disabled {
  background: var(--text-secondary);
  cursor: not-allowed;
  transform: none;
}

.btn-loader {
  display: inline-block;
}

/* ============================================
   메시지
   ============================================ */
.warning-message,
.success-message {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  animation: slideIn 0.3s ease-out;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.warning-message {
  background: #FFF3E0;
  border-left: 6px solid var(--warning);
  color: #212121;
}

.success-message {
  background: #E8F5E9;
  border-left: 6px solid var(--success);
  color: #212121;
}

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

/* ============================================
   푸터
   ============================================ */
footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  border-top: 2px solid var(--border-color);
}

footer p {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.footer-note {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ============================================
   반응형 - 데스크톱
   ============================================ */
@media (min-width: 769px) {
  main {
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
  }

  h1 {
    font-size: 32px;
  }

  .chip {
    flex: 0 0 auto;
    min-width: 140px;
  }

  .radio-group {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .radio-label {
    flex: 1 1 calc(50% - 8px);
  }
}

/* ============================================
   인쇄 스타일 (선택)
   ============================================ */
@media print {
  body {
    background: white;
  }

  main {
    max-width: 100%;
    box-shadow: none;
  }

  .submit-btn {
    display: none;
  }

  .chip,
  .radio-label {
    border: 1px solid #000;
  }
}

/* ============================================
   접근성 개선
   ============================================ */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* 고대비 모드 지원 */
@media (prefers-contrast: high) {
  :root {
    --primary: #0D47A1;
    --text-primary: #000000;
    --bg-primary: #FFFFFF;
  }

  .chip,
  .radio-label,
  input,
  textarea {
    border-width: 3px;
  }
}

/* 다크 모드 지원 (선택) */
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #64B5F6;
    --primary-dark: #42A5F5;
    --bg-primary: #1E1E1E;
    --bg-secondary: #2D2D2D;
    --bg-tertiary: #1A237E;
    --text-primary: #E0E0E0;
    --text-secondary: #B0B0B0;
    --border-color: #424242;
  }

  body {
    background: #121212;
  }
}