/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --info: #0891b2;
  --info-light: #ecfeff;
  --sidebar-width: 240px;
  --header-height: 64px;
  --bg: #f1f5f9;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --transition: 0.2s ease;
}

/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  height: 100vh;
  overflow: hidden;
}
input, select, textarea, button { font-family: inherit; font-size: inherit; }
a { text-decoration: none; color: var(--primary); }
svg { width: 20px; height: 20px; fill: currentColor; display: inline-block; vertical-align: middle; flex-shrink: 0; }

/* ─── Sidebar ───────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: #0f172a;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: white;
  flex-shrink: 0;
}
.logo-text strong { display: block; color: #f8fafc; font-size: 14px; font-weight: 700; }
.logo-text span { color: #94a3b8; font-size: 11px; }

.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: #94a3b8;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
  margin-bottom: 2px;
  cursor: pointer;
}
.nav-item svg { width: 18px; height: 18px; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: #e2e8f0; }
.nav-item.active { background: rgba(59,130,246,0.2); color: #60a5fa; }
.nav-item.active svg { color: #3b82f6; }

.sidebar-footer {
  padding: 14px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.version-badge {
  display: inline-block;
  background: rgba(255,255,255,0.08);
  color: #64748b;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
}

/* ─── Main Wrapper ──────────────────────────────────────────── */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ─── Top Header ────────────────────────────────────────────── */
.top-header {
  height: var(--header-height);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  flex-shrink: 0;
  box-shadow: var(--shadow);
}
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; color: var(--text-muted); border-radius: var(--radius-sm); }
.menu-toggle:hover { background: var(--bg); }
.page-title { font-size: 18px; font-weight: 700; flex: 1; }
.header-actions { display: flex; gap: 10px; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #b91c1c; }
.btn-danger.btn-outline { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger.btn-outline:hover { background: #fef2f2; }
.btn-warning { background: var(--warning); color: white; }
.btn-warning:hover { background: #b45309; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 6px; border-radius: 6px; }

/* ─── Content Area ──────────────────────────────────────────── */
.content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* ─── Pages ─────────────────────────────────────────────────── */
.page { display: none; }
.page.active { display: block; }

/* ─── Stats Grid ────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
  border-left: 4px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-card.total { border-color: var(--primary); }
.stat-card.danger { border-color: var(--danger); }
.stat-card.warning { border-color: var(--warning); }
.stat-card.info { border-color: var(--info); }
.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-card.total .stat-icon { background: var(--primary-light); color: var(--primary); }
.stat-card.danger .stat-icon { background: var(--danger-light); color: var(--danger); }
.stat-card.warning .stat-icon { background: var(--warning-light); color: var(--warning); }
.stat-card.info .stat-icon { background: var(--info-light); color: var(--info); }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ─── Dashboard Grid ─────────────────────────────────────────── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 16px;
}

/* ─── Card ───────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-header h3 { font-size: 14px; font-weight: 600; }

/* ─── Expiring List ──────────────────────────────────────────── */
.expiring-list { overflow-y: auto; max-height: 320px; }
.expiring-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.expiring-item:hover { background: var(--bg); }
.expiring-item:last-child { border-bottom: none; }
.expiring-days {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-weight: 700;
}
.expiring-days .num { font-size: 18px; line-height: 1; }
.expiring-days .unit { font-size: 10px; margin-top: 1px; }
.expiring-days.urgent { background: var(--danger-light); color: var(--danger); }
.expiring-days.warning { background: var(--warning-light); color: var(--warning); }
.expiring-days.normal { background: var(--primary-light); color: var(--primary); }
.expiring-info { flex: 1; min-width: 0; }
.expiring-info strong { display: block; font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.expiring-info span { font-size: 12px; color: var(--text-muted); }

/* ─── Type Chart ─────────────────────────────────────────────── */
.type-chart { padding: 24px; }
.chart-bar { margin-bottom: 20px; }
.chart-bar-label { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; }
.chart-bar-track { height: 10px; background: var(--bg); border-radius: 10px; overflow: hidden; }
.chart-bar-fill { height: 100%; border-radius: 10px; transition: width 0.6s ease; }
.chart-bar-fill.terminal { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.chart-bar-fill.card { background: linear-gradient(90deg, #8b5cf6, #a78bfa); }

/* ─── Toolbar ────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  flex: 1;
  min-width: 200px;
  max-width: 400px;
  box-shadow: var(--shadow);
}
.search-box svg { color: var(--text-muted); flex-shrink: 0; }
.search-box input { border: none; outline: none; background: transparent; flex: 1; font-size: 13px; }
.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.filter-group label { font-size: 13px; color: var(--text-muted); white-space: nowrap; }
.filter-group select {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  background: var(--surface);
  cursor: pointer;
  outline: none;
  font-size: 13px;
  box-shadow: var(--shadow);
}

/* ─── Table ──────────────────────────────────────────────────── */
.table-container {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: auto;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}
.data-table th {
  background: #f8fafc;
  padding: 11px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1;
}
.data-table th:first-child,
.data-table td:first-child {
  width: 40px;
  text-align: center;
  padding: 10px 0;
}
.row-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary);
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #fafbff; }
.data-table .action-btns { display: flex; gap: 6px; }

/* ─── Badges ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}
.badge-success { background: var(--success-light); color: var(--success); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-secondary { background: #f1f5f9; color: #475569; }

.days-badge {
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 12px;
}
.days-urgent { background: var(--danger-light); color: var(--danger); }
.days-warning { background: var(--warning-light); color: var(--warning); }
.days-ok { background: var(--primary-light); color: var(--primary); }
.days-expired { background: #f1f5f9; color: #94a3b8; }

/* ─── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  width: 680px;
  max-width: 95vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.22s ease;
}
.modal-sm { width: 420px; }
@keyframes modalIn {
  from { opacity: 0; transform: translateY(-20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 16px; font-weight: 700; }
.modal-close {
  width: 30px;
  height: 30px;
  border: none;
  background: var(--bg);
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover { background: var(--border); color: var(--text); }
.modal-body { padding: 20px 24px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ─── Modal Tabs ─────────────────────────────────────────────── */
.modal-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: var(--bg);
  padding: 4px;
  border-radius: var(--radius-sm);
}
.tab-btn {
  flex: 1;
  padding: 7px;
  border: none;
  background: transparent;
  border-radius: 5px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}
.tab-btn.active { background: var(--surface); color: var(--primary); font-weight: 600; box-shadow: var(--shadow); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── Forms ──────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--surface);
  font-size: 13px;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.required { color: var(--danger); }
.help-text { font-size: 11px; color: var(--text-muted); }
.help-link { font-size: 11px; margin-left: 6px; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ─── Settings ───────────────────────────────────────────────── */
.settings-container { display: grid; gap: 20px; }
.settings-container .card .modal-body,
.settings-container .card .form-grid,
.settings-container .card .form-actions { padding: 20px; }
.settings-container .card > .form-grid,
.settings-container .card > .form-actions { padding: 20px; }

/* ─── Deploy Guide ───────────────────────────────────────────── */
.deploy-guide { padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.guide-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.step-num {
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.step-content { flex: 1; }
.step-content strong { display: block; font-size: 13px; margin-bottom: 5px; }
.step-content code {
  display: block;
  background: #0f172a;
  color: #a5f3fc;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 12px;
}

/* ─── Pagination ─────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
}
.pagination button {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.pagination button:hover { background: var(--bg); }
.pagination button.active { background: var(--primary); color: white; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.4; cursor: default; }
.pagination .page-info { font-size: 13px; color: var(--text-muted); padding: 0 8px; }

/* ─── Toast ──────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius);
  background: #1e293b;
  color: white;
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  display: none;
  align-items: center;
  gap: 8px;
  max-width: 360px;
  animation: toastIn 0.22s ease;
}
.toast.show { display: flex; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Loading ────────────────────────────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--text-muted);
  flex-direction: column;
  gap: 12px;
}
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
  gap: 12px;
}
.empty-state svg { width: 48px; height: 48px; opacity: 0.3; }
.empty-state p { font-size: 15px; }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  :root { --sidebar-width: 0px; }
  .sidebar { transform: translateX(-240px); width: 240px; }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .menu-toggle { display: flex; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .content { padding: 14px; }
  .stats-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: 1; }
  .header-actions .btn span { display: none; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .search-box { max-width: 100%; }
}