/* ============================================
   임신 예정일 계산기 스타일
   ============================================ */

/* CSS 변수 정의 - 라이트 모드 */
.pregnancy-due-date-calculator-container {
  /* 배경색 */
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  
  /* 테두리 */
  --border-color: #333;
  
  /* 텍스트 */
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* 브랜드 색상 */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  --color-teal: #1abc9c;
  
  /* 그림자 */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  /* 입력 포커스 */
  --input-focus-bg: #fffacd;
  
  /* 헤더 타이틀 */
  --title-color: #2c3e50;
  --title-shadow: 2px 2px 0 rgba(255,255,255,0.5);
  
  /* 버튼 호버 */
  --btn-hover-overlay: rgba(0,0,0,0.1);
  
  /* 복사 버튼 */
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
}

/* CSS 변수 정의 - 다크 모드 */
.pregnancy-due-date-calculator-container.dark {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  
  --border-color: #e0e0e0;
  
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  --color-teal: #48d1cc;
  
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  
  --input-focus-bg: #3a3a3a;
  
  --title-color: #7fb3d5;
  --title-shadow: 2px 2px 0 rgba(0,0,0,0.5);
  
  --btn-hover-overlay: rgba(255,255,255,0.1);
  
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
}

/* 전역 box-sizing */
.pregnancy-due-date-calculator-container,
.pregnancy-due-date-calculator-container *,
.pregnancy-due-date-calculator-container *::before,
.pregnancy-due-date-calculator-container *::after {
  box-sizing: border-box;
}

/* 메인 컨테이너 */
.pregnancy-due-date-calculator-container {
  position: relative;
  max-width: 1180px;
  width: 100%;
  margin: 15px auto;
  padding: 12px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  font-family: 'Noto Sans KR', 'Malgun Gothic', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

/* ============================================
   헤더
   ============================================ */
.pregnancy-due-date-calculator-container .calculator-header {
  text-align: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 3px double var(--border-color);
}

.pregnancy-due-date-calculator-container .calculator-header h2 {
  margin: 0 0 6px 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--title-color);
  text-shadow: var(--title-shadow);
  line-height: 1.2;
}

.pregnancy-due-date-calculator-container .subtitle {
  margin: 0;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.4;
}

/* 다크모드 토글 버튼 */
.pregnancy-due-date-calculator-container .dark-mode-toggle {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.15);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
}

.pregnancy-due-date-calculator-container .dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

.pregnancy-due-date-calculator-container .dark-mode-toggle:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ============================================
   메인 그리드
   ============================================ */
.pregnancy-due-date-calculator-container .calculator-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

/* ============================================
   섹션 공통
   ============================================ */
.pregnancy-due-date-calculator-container .input-section,
.pregnancy-due-date-calculator-container .result-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  box-shadow: var(--shadow-md);
}

.pregnancy-due-date-calculator-container .section-title {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 10px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
}

.pregnancy-due-date-calculator-container .input-section .section-title {
  color: var(--color-accent);
}

.pregnancy-due-date-calculator-container .result-section .section-title {
  color: var(--color-success);
}

/* ============================================
   입력 필드
   ============================================ */
.pregnancy-due-date-calculator-container .input-group {
  margin-bottom: 12px;
}

.pregnancy-due-date-calculator-container .input-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.pregnancy-due-date-calculator-container .input-date {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-section);
  font-size: 15px;
  font-family: inherit;
  color: var(--text-primary);
  transition: all 0.2s;
}

.pregnancy-due-date-calculator-container .input-date:focus {
  outline: none;
  background: var(--input-focus-bg);
  border-color: var(--color-accent);
}

.pregnancy-due-date-calculator-container .input-hint {
  margin: 6px 0 0 0;
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.4;
}

/* ============================================
   버튼
   ============================================ */
.pregnancy-due-date-calculator-container .btn-calculate {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--color-accent);
  border: 1.5px solid var(--border-color);
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
  font-family: inherit;
  margin-bottom: 10px;
}

.pregnancy-due-date-calculator-container .btn-calculate:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
}

.pregnancy-due-date-calculator-container .btn-calculate:active {
  transform: translate(4px, 4px);
  box-shadow: none;
}

.pregnancy-due-date-calculator-container .button-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pregnancy-due-date-calculator-container .btn-sample {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 12px;
  background: var(--color-success);
  border: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  font-family: inherit;
  white-space: nowrap;
}

.pregnancy-due-date-calculator-container .btn-sample:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

.pregnancy-due-date-calculator-container .btn-sample:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.pregnancy-due-date-calculator-container .btn-reset {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 12px;
  background: var(--color-warning);
  border: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  font-family: inherit;
}

.pregnancy-due-date-calculator-container .btn-reset:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2);
}

.pregnancy-due-date-calculator-container .btn-reset:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ============================================
   결과
   ============================================ */
.pregnancy-due-date-calculator-container .result-item {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border-color);
}

.pregnancy-due-date-calculator-container .result-item:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.pregnancy-due-date-calculator-container .result-label {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.pregnancy-due-date-calculator-container .result-value-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pregnancy-due-date-calculator-container .result-value {
  flex: 1;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
  font-family: 'Courier New', monospace;
}

.pregnancy-due-date-calculator-container .btn-copy-small {
  padding: 6px 8px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 1px 1px 0 rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pregnancy-due-date-calculator-container .btn-copy-small:hover {
  background: var(--copy-btn-hover-bg);
  transform: translate(0.5px, 0.5px);
  box-shadow: 0.5px 0.5px 0 rgba(0,0,0,0.15);
}

.pregnancy-due-date-calculator-container .btn-copy-small:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

/* ============================================
   진행률 바
   ============================================ */
.pregnancy-due-date-calculator-container .progress-bar {
  position: relative;
  width: 100%;
  height: 28px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.pregnancy-due-date-calculator-container .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-success), var(--color-teal));
  transition: width 0.3s ease;
}

.pregnancy-due-date-calculator-container .progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  z-index: 1;
}

/* ============================================
   정보 박스
   ============================================ */
.pregnancy-due-date-calculator-container .info-box {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--color-teal);
  margin-top: 12px;
}

.pregnancy-due-date-calculator-container .info-box svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-teal);
}

.pregnancy-due-date-calculator-container .info-box span {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================
   토스트 알림
   ============================================ */
.pregnancy-due-date-calculator-container .toast-notification {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 12px 16px;
  background: #2c3e50;
  border: 2px solid var(--border-color);
  color: #fff;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  pointer-events: none;
  z-index: 1000;
  max-width: 320px;
}

.pregnancy-due-date-calculator-container .toast-notification.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.pregnancy-due-date-calculator-container .toast-notification strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 700;
}

.pregnancy-due-date-calculator-container .toast-notification span {
  display: block;
  font-size: 13px;
  line-height: 1.4;
}

/* ============================================
   반응형
   ============================================ */
@media (max-width: 768px) {
  .pregnancy-due-date-calculator-container {
    margin: 8px 5px;
    width: calc(100% - 10px);
    padding: 10px;
  }

  .pregnancy-due-date-calculator-container .calculator-main {
    grid-template-columns: 1fr;
  }

  .pregnancy-due-date-calculator-container .calculator-header h2 {
    font-size: 24px;
  }

  .pregnancy-due-date-calculator-container .button-group {
    flex-direction: column;
  }

  .pregnancy-due-date-calculator-container .btn-sample,
  .pregnancy-due-date-calculator-container .btn-reset {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .pregnancy-due-date-calculator-container {
    padding: 8px;
    border-width: 1px;
  }

  .pregnancy-due-date-calculator-container .calculator-header h2 {
    font-size: 20px;
  }

  .pregnancy-due-date-calculator-container .subtitle {
    font-size: 13px;
  }

  .pregnancy-due-date-calculator-container .result-value {
    font-size: 16px;
  }

  .pregnancy-due-date-calculator-container .toast-notification {
    right: 10px;
    left: 10px;
    max-width: none;
  }
}