/* CSS 변수 */
.milestone-calculator-wrapper {
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --border-color: #333;
  --text-primary: #222;
  --text-secondary: #555;
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
}

/* 전역 box-sizing */
.milestone-calculator-wrapper,
.milestone-calculator-wrapper *,
.milestone-calculator-wrapper *::before,
.milestone-calculator-wrapper *::after {
  box-sizing: border-box;
}

/* 메인 컨테이너 - 컴팩트 */
.milestone-calculator-container {
  max-width: 1180px;
  width: 100%;
  margin: 15px auto;
  padding: 15px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  font-family: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  line-height: 1.5;
}

/* 헤더 - 컴팩트 */
.calculator-header {
  text-align: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
}

.calculator-header h2 {
  margin: 0 0 5px 0;
  font-size: 28px;
  font-weight: 700;
  color: #2c3e50;
  line-height: 1.2;
}

.calculator-header .subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* 메인 레이아웃 */
.main-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 15px;
  margin-bottom: 15px;
}

/* 입력 섹션 - 컴팩트 */
.input-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

/* 결과 섹션 */
.result-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.1);
  min-height: 400px;
}

/* 섹션 타이틀 - 컴팩트 */
.section-title {
  margin: 0 0 10px 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent);
}

.sub-title {
  margin: 15px 0 8px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

/* 음력/양력 버튼 */
.calendar-type-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin-bottom: 10px;
}

.cal-btn {
  padding: 8px;
  background: #f0f0f0;
  border: 1px solid var(--border-color);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.cal-btn:hover:not(:disabled) {
  background: #e0e0e0;
}

.cal-btn.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.cal-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 날짜 입력 - 컴팩트 */
.date-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 5px;
  margin-bottom: 8px;
}

.input-col label {
  display: block;
  margin-bottom: 3px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.input-col input,
.input-col select {
  width: 100%;
  padding: 6px;
  border: 1px solid var(--border-color);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
}

.input-col input:focus,
.input-col select:focus {
  outline: none;
  border-color: var(--color-warning);
  background: #fffacd;
}

/* 에러 메시지 */
.err {
  display: block;
  font-size: 10px;
  color: var(--color-danger);
  font-weight: 600;
  min-height: 12px;
  margin-top: 2px;
}

/* 미리보기 */
.preview {
  padding: 8px;
  background: #f9f9f9;
  border: 1px solid #ddd;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview.success {
  background: #e8f5e9;
  color: var(--color-success);
}

.preview.error {
  background: #ffebee;
  color: var(--color-danger);
}

/* 윤년 안내 */
.leap-notice {
  padding: 6px 8px;
  background: #fff8e1;
  border-left: 3px solid #ffb300;
  font-size: 11px;
  color: #f57c00;
  font-weight: 600;
  margin-bottom: 8px;
}

/* 계산 버튼 */
.btn-calc {
  width: 100%;
  padding: 12px;
  background: var(--color-success);
  color: #fff;
  border: 1px solid var(--border-color);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.2);
  font-family: inherit;
  margin-bottom: 8px;
}

.btn-calc:hover {
  background: #229954;
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}

.btn-calc:active {
  transform: translate(3px, 3px);
  box-shadow: none;
}

/* 샘플 버튼 */
.sample-btns {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 4px;
  margin-bottom: 10px;
}

.btn-sample,
.btn-reset {
  padding: 6px;
  background: #fff;
  border: 1px solid var(--border-color);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-sample:hover:not(:disabled),
.btn-reset:hover {
  background: #f0f0f0;
}

.btn-sample:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-reset {
  background: var(--color-warning);
  color: #fff;
}

/* 나이 박스 */
.age-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin-bottom: 8px;
  padding: 8px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: 1px solid var(--border-color);
}

.age-item {
  text-align: center;
}

.age-label {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  margin-bottom: 3px;
}

.age-value {
  display: block;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  font-family: 'Courier New', monospace;
}

/* 공유 버튼 */
.btn-share {
  width: 100%;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-share:hover {
  background: #f0f0f0;
}

/* 초기 메시지 */
.initial-msg {
  text-align: center;
  padding: 60px 20px;
  color: #999;
}

.msg-icon {
  font-size: 64px;
  margin-bottom: 15px;
}

.initial-msg p {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  margin: 0;
}

/* 기념일 그리드 */
.milestone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 15px;
}

/* 기념일 카드 - 크고 명확하게 */
.milestone-card {
  background: #fff;
  border: 1px solid var(--border-color);
  padding: 12px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.1);
  position: relative;
  border-radius:3px;
}

.milestone-card:hover {
  transform: translateY(-2px);
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
}

.milestone-card.passed {
  background: #f5f5f5;
  opacity: 0.8;
}

.milestone-card.upcoming {
  border-color: var(--color-success);
  background: #f0fdf4;
}

.milestone-badge {
  display: inline-block;
  padding: 3px 8px;
  background: var(--color-success);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 6px;
}

.milestone-card.passed .milestone-badge {
  background: #999;
}

.milestone-card.upcoming .milestone-badge {
  background: var(--color-danger);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.milestone-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.milestone-age {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 600;
}

.milestone-date {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.milestone-dday {
  font-size: 20px;
  font-weight: 700;
  padding: 6px;
  background: #f0f0f0;
  text-align: center;
  margin-bottom: 6px;
  font-family: 'Courier New', monospace;
}

.milestone-card.upcoming .milestone-dday {
  background: #ffe6e6;
  color: var(--color-danger);
}

.milestone-card.passed .milestone-dday {
  color: #999;
}

.milestone-detail {
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

/* 복사 알림 */
.copy-notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-success);
  color: #fff;
  padding: 10px 20px;
  border: 2px solid var(--border-color);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
  opacity: 0;
  transition: all 0.3s;
  z-index: 1000;
}

.copy-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 광고 */
.ad-section {
  width: 100%;
  min-height: 90px;
  padding: 10px;
  text-align: center;
  background: #fff;
  border: 1px solid #ddd;
  margin-bottom: 10px;
}

.ad-label {
  font-size: 10px;
  color: #999;
  margin-bottom: 8px;
}

/* 안내 섹션 */
.info-section {
  background: #fff;
  border: 1px solid var(--border-color);
  padding: 10px;
}

.info-section details {
  cursor: pointer;
}

.info-section summary {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  padding: 5px;
}

.info-section ul {
  margin: 8px 0 0 0;
  padding-left: 20px;
}

.info-section li {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 5px;
  line-height: 1.5;
}

.info-section strong {
  color: var(--text-primary);
}

/* 반응형: 태블릿 */
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .milestone-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

/* 반응형: 모바일 */
@media (max-width: 768px) {
  .milestone-calculator-container {
    margin: 10px 5px;
    padding: 10px;
    width: calc(100% - 10px);
  }
  
  .calculator-header h2 {
    font-size: 24px;
  }
  
  .date-inputs {
    grid-template-columns: 1fr;
  }
  
  .sample-btns {
    grid-template-columns: 1fr 1fr;
  }
  
  .milestone-grid {
    grid-template-columns: 1fr;
  }
  
  .milestone-name {
    font-size: 20px;
  }
}

/* 인쇄 */
@media print {
  .milestone-calculator-container {
    max-width: 100%;
    margin: 0;
    padding: 10px;
    border: none;
    box-shadow: none;
  }
  
  .ad-section,
  .sample-btns,
  .btn-calc,
  .btn-share,
  .info-section {
    display: none !important;
  }
  
  .milestone-card {
    page-break-inside: avoid;
    border: 1px solid #000;
    box-shadow: none;
  }
}