:root {
  --primary-color: #1E5149;
  --primary-hover: #153c36;
  --primary-light: #edf2f1;
  --text-main: #111827;
  --text-muted: #6B7280;
  --border-color: #E5E7EB;
  --bg-color: #F9FAFB;
  --sidebar-bg: #ffffff;
  --white: #FFFFFF;
  --danger: #dc2626;
  
  --dash-primary: #6cc020;
  --dash-light: #f2f9ec;
  --dash-danger: #cf222e;
}

.shadow-sm {
  box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
}
.rounded-lg {
  border-radius: 8px;
}
.dashboard-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: none;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.dashboard-layout-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
@media (max-width: 768px) {
  .dashboard-layout-2col {
    grid-template-columns: 1fr;
  }
}

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

body {
  font-family: 'Pretendard Variable', Pretendard, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-color);
  line-height: 1.5;
  letter-spacing: -0.02em;
  font-size: 14px;
}

/* App Layout - Sidebar & Main Content */
.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

.sidebar {
  width: 260px;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.sidebar-header h1 span {
  color: var(--primary-color);
}

.nav-section {
  padding: 1.5rem 0 0.5rem;
}

.nav-section h3 {
  padding: 0 1.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-section h3 i {
  width: 14px;
  height: 14px;
}

.nav-list {
  list-style: none;
}

.nav-list li {
  padding: 0.75rem 1.5rem;
  margin: 0.25rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-main);
  font-weight: 500;
  transition: all 0.2s;
}

.nav-list li i {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.nav-list li:hover {
  background-color: var(--bg-color);
}

.nav-list li.active {
  background-color: var(--primary-light);
  color: var(--primary-color);
}

.nav-list li.active i {
  color: var(--primary-color);
}

/* Main Content Wrapper */
.main-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header */
.top-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background-color: var(--white);
  border-bottom: 1px solid var(--border-color);
}

.header-title h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

.content-area {
  padding: 2rem;
  flex: 1;
  overflow-y: auto;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--white);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
}

.stat-card .title {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1;
}

.btn i { width: 16px; height: 16px; }

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
  border: 1px solid var(--primary-color);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.btn-outline:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-color);
}

.text-nowrap {
  white-space: nowrap;
}

.btn-danger {
  color: var(--danger);
  border-color: #fca5a5;
}

.btn-danger:hover {
  background-color: #fef2f2;
}

.btn-icon {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0.25rem;
}

/* Table */
.table-container {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: auto; /* 가로/세로 스크롤 허용 */
  max-height: calc(100vh - 180px); /* 화면 높이에 맞춰 제한 (가로 스크롤바 노출용) */
  position: relative;
}

table {
  width: 100%;
  border-collapse: separate; /* sticky border 유지를 위해 separate 설정 */
  border-spacing: 0;
  text-align: left;
}

th, td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.875rem;
  white-space: nowrap;
  background-color: #FAFAFA;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: inset 0 -1px 0 var(--border-color); /* sticky 시 경계선 유지 */
}

td {
  font-size: 0.875rem;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background-color: var(--bg-color); }
.empty-row td { text-align: center; padding: 3rem; color: var(--text-muted); }

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay:not(.hidden) { opacity: 1; visibility: visible; }
.modal-content {
  background-color: var(--white);
  width: 100%; max-width: 600px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  transform: translateY(20px);
  transition: transform 0.2s ease;
}
.modal-overlay:not(.hidden) .modal-content { transform: translateY(0); }
.modal-header {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-header h2 { font-size: 1.125rem; font-weight: 500; }
.modal-body { padding: 1.5rem; }
.grid-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.form-group { display: flex; flex-direction: column; gap: 0.375rem; }
.form-group.full-width { grid-column: span 2; }
.form-group label { font-size: 0.875rem; font-weight: 500; }
.form-group input, .form-group textarea {
  padding: 0.625rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: inherit; font-size: 0.875rem;
  outline: none; transition: border-color 0.2s;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary-color); }
.modal-footer {
  padding: 1rem 1.5rem; border-top: 1px solid var(--border-color);
  display: flex; justify-content: space-between; align-items: center;
}
.footer-actions { display: flex; gap: 0.5rem; }