/* ========================================
   통합 모니터링 시스템 - 메인 스타일시트
   ======================================== */

/* 변수 정의 */
:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --danger-color: #e74c3c;
  --warning-color: #f39c12;
  --dark-color: #2c3e50;
  --light-color: #ecf0f1;
  --bg-color: #f8f9fa;
  --card-shadow: 0 2px 10px rgba(0,0,0,0.1);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--dark-color);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 헤더 스타일 */
.header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 1.5rem 0;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo svg {
  color: white;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255,255,255,0.2);
  border-radius: 20px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #2ecc71;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(46, 204, 113, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
  }
}

.time {
  font-size: 1.1rem;
  font-weight: 500;
}

/* 메인 컨텐츠 */
.main {
  flex: 1;
  padding: 2rem 0;
}

/* 빠른 통계 섹션 */
.quick-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  display: flex;
  align-items: center;
  gap: 1.5rem;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.stat-icon {
  font-size: 2.5rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-color);
  border-radius: 50%;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
}

.stat-label {
  color: #7f8c8d;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 서비스 그리드 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.service-card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.service-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.service-icon {
  width: 50px;
  height: 50px;
}

.service-status {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
}

.service-status.online {
  background-color: var(--secondary-color);
  animation: pulse 2s infinite;
}

.service-status.offline {
  background-color: var(--danger-color);
}

.service-status.warning {
  background-color: var(--warning-color);
  animation: pulse 2s infinite;
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

.service-description {
  color: #7f8c8d;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.service-stats {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--light-color);
  border-bottom: 1px solid var(--light-color);
}

.service-stat {
  flex: 1;
}

.service-stat .stat-label {
  display: block;
  font-size: 0.8rem;
  color: #7f8c8d;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.service-stat .stat-value {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--primary-color);
}

.service-actions {
  display: flex;
  gap: 0.75rem;
}

/* 버튼 스타일 */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 5px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  flex: 1;
  display: inline-block;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: #2980b9;
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--light-color);
  color: var(--dark-color);
}

.btn-secondary:hover {
  background: #d5dbdd;
  transform: translateY(-2px);
}

.btn-disabled {
  background: #95a5a6;
  color: white;
  cursor: not-allowed;
  opacity: 0.6;
}

/* 시스템 정보 섹션 */
.system-info {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  margin-bottom: 3rem;
}

.system-info h2 {
  margin-bottom: 1.5rem;
  color: var(--dark-color);
  font-size: 1.5rem;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--bg-color);
  border-radius: 5px;
}

.info-label {
  color: #7f8c8d;
  font-weight: 500;
}

.info-value {
  color: var(--dark-color);
  font-weight: bold;
}

/* 빠른 링크 섹션 */
.quick-links {
  margin-bottom: 3rem;
}

.quick-links h2 {
  margin-bottom: 1.5rem;
  color: var(--dark-color);
  font-size: 1.5rem;
}

.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.link-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--card-shadow);
  text-decoration: none;
  color: var(--dark-color);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.link-card:hover {
  transform: translateX(5px);
  box-shadow: 0 3px 15px rgba(0,0,0,0.15);
  background: var(--primary-color);
  color: white;
}

.link-icon {
  font-size: 1.5rem;
}

.link-text {
  font-weight: 500;
}

/* 푸터 */
.footer {
  background: var(--dark-color);
  color: white;
  padding: 1.5rem 0;
  text-align: center;
  margin-top: auto;
}

.footer p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .header-info {
    width: 100%;
    justify-content: space-between;
  }
  
  .quick-stats {
    grid-template-columns: 1fr;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .service-actions {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .logo h1 {
    font-size: 1.2rem;
  }
  
  .stat-card {
    flex-direction: column;
    text-align: center;
  }
  
  .links-grid {
    grid-template-columns: 1fr;
  }
}

/* 로딩 애니메이션 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(0,0,0,.1);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 툴팁 */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 200px;
  background-color: var(--dark-color);
  color: white;
  text-align: center;
  border-radius: 5px;
  padding: 0.5rem;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -100px;
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 0.85rem;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/* 알림 배지 */
.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: bold;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  border-radius: 10px;
  background: var(--danger-color);
  color: white;
}

.badge.success {
  background: var(--secondary-color);
}

.badge.warning {
  background: var(--warning-color);
}

.badge.info {
  background: var(--primary-color);
}