:root {
  --primary: #00adff;
  --primary-dark: #0090d6;
  --primary-light: #33bdff;
  --secondary: #005580;
  --accent: #00adff;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #00adff;
  --bg-dark: #000000;
  --bg-sidebar: #0a0a0a;
  --bg-card: #ffffff;
  --bg-gray: #f5f7fa;
  --text-dark: #333333;
  --text-gray: #666666;
  --text-light: #999999;
  --border: #e0e0e0;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --sidebar-width: 240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg-gray); color: var(--text-dark); font-size: 14px; line-height: 1.5; }

/* ============ GNB Header ============ */
.gnb {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 52px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
}
.gnb-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; }
.gnb-logo i { font-size: 22px; }
.gnb-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.gnb-status { display: flex; align-items: center; gap: 8px; padding: 5px 12px; background: rgba(255,255,255,0.1); border-radius: 16px; font-size: 12px; }
.gnb-status .dot { width: 8px; height: 8px; border-radius: 50%; }
.gnb-status .dot.online { background: #2ed573; }
.gnb-status .dot.offline { background: #ff4757; }
.gnb-mode-switch { display: flex; background: rgba(0,0,0,0.2); border-radius: 16px; overflow: hidden; }
.gnb-mode-switch button { border: none; background: transparent; color: rgba(255,255,255,0.6); padding: 5px 14px; font-size: 12px; font-weight: 500; cursor: pointer; transition: all 0.2s; }
.gnb-mode-switch button.active { background: rgba(255,255,255,0.2); color: #fff; }

/* ============ Sidebar ============ */
.sidebar {
  position: fixed;
  top: 52px;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  overflow-y: auto;
  z-index: 100;
  padding: 8px 0;
  display: flex;
  flex-direction: column;
}
.sidebar-section { padding: 12px 16px 4px; font-size: 10px; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.35); font-weight: 600; }
.sidebar-divider { height: 1px; background: rgba(255,255,255,0.08); margin: 8px 16px; }
.sidebar a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 16px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.sidebar a:hover { background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.85); }
.sidebar a.active { background: rgba(255,255,255,0.08); color: #fff; border-left-color: var(--accent); }
.sidebar a i { font-size: 18px; width: 20px; text-align: center; }
.sidebar a .badge-count {
  margin-left: auto; background: var(--accent); color: #fff;
  font-size: 10px; padding: 1px 6px; border-radius: 8px; font-weight: 600;
}

/* Sidebar Protocol toggle (All / 1.6 / 2.0.1) — controls menu visibility */
.protocol-toggle {
  display: flex; gap: 2px; margin: 12px; padding: 2px;
  background: rgba(255,255,255,0.05); border-radius: 6px;
}
.protocol-toggle button {
  flex: 1; padding: 4px 0; border: 0; border-radius: 4px; cursor: pointer;
  font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.55);
  background: transparent; transition: background .15s, color .15s;
}
.protocol-toggle button:hover { color: rgba(255,255,255,0.85); }
.protocol-toggle button.active {
  background: var(--primary); color: #fff;
}

/* 2.0.1-only 메뉴 옆 작은 inline 배지 (All / 2.0.1 모드일 때만 메뉴 가시) */
.sidebar a[data-protocol="2.0.1"]::after {
  content: "2.0.1";
  margin-left: auto;
  font-size: 9px; font-weight: 600; letter-spacing: .3px;
  padding: 1px 5px; border-radius: 6px;
  background: rgba(0, 173, 255, 0.18); color: var(--primary-light);
}

/* Sidebar Bottom Button */
.sidebar-bottom {
  position: sticky;
  bottom: 0;
  padding: 12px 16px;
  background: linear-gradient(transparent, var(--bg-sidebar) 30%);
  margin-top: auto;
}
.sidebar-bottom-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(255,255,255,0.06);
  border-radius: 8px;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.2s;
  border: 1px solid rgba(255,255,255,0.06);
  border-left: 3px solid transparent;
}
.sidebar-bottom-btn:hover {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.12);
  border-left-color: var(--accent);
}
.sidebar-bottom-btn i {
  font-size: 24px;
}

/* ============ Main Content ============ */
.main {
  margin-left: var(--sidebar-width);
  margin-top: 52px;
  padding: 24px;
  min-height: calc(100vh - 52px);
}
.page { display: none; }
.page.active { display: block; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.page-title { font-size: 20px; font-weight: 600; color: var(--text-dark); }
.page-subtitle { font-size: 13px; color: var(--text-gray); margin-top: 2px; }

/* ============ Cards ============ */
.card { background: var(--bg-card); border-radius: 8px; box-shadow: var(--shadow); margin-bottom: 20px; }
.card-header {
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-header h3 { font-size: 14px; font-weight: 600; color: var(--text-dark); display: flex; align-items: center; gap: 8px; }
.card-header h3 i { color: var(--primary); font-size: 16px; }
.card-body { padding: 20px; }
.card-footer { padding: 12px 20px; border-top: 1px solid var(--border); background: var(--bg-gray); border-radius: 0 0 8px 8px; }

/* ============ Grid / Stats ============ */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 20px; }
.stat-card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: var(--shadow); }
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 12px; color: var(--text-gray); margin-top: 4px; }
.stat-card .stat-icon { float: right; font-size: 32px; color: var(--border); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }

/* ============ Form Elements ============ */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 500; color: var(--text-dark); font-size: 12px; }
.form-group label.required::after { content: ' *'; color: var(--danger); }
.form-control {
  width: 100%; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 4px; font-size: 13px; transition: border-color 0.2s;
  font-family: inherit;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(61,107,107,0.1); }
.form-control:disabled { background: var(--bg-gray); color: var(--text-light); }
textarea.form-control { resize: vertical; min-height: 80px; font-family: 'Monaco', 'Consolas', monospace; font-size: 12px; }
.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }
.form-inline { display: flex; align-items: flex-end; gap: 8px; }
.form-help { font-size: 11px; color: var(--text-light); margin-top: 3px; }
select.form-control { cursor: pointer; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  padding: 8px 16px; border: none; border-radius: 4px;
  font-size: 13px; font-weight: 500; cursor: pointer; transition: all 0.15s;
  font-family: inherit; white-space: nowrap;
}
.btn i { font-size: 15px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #fff; color: var(--text-dark); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-gray); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #229a3b; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c82333; }
.btn-warning { background: var(--warning); color: #333; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-xs { padding: 3px 8px; font-size: 11px; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ============ Tables ============ */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { background: var(--bg-gray); font-weight: 600; color: var(--text-dark); font-size: 12px; text-transform: uppercase; letter-spacing: 0.3px; position: sticky; top: 0; }
td { color: var(--text-dark); }
tr:hover td { background: rgba(61,107,107,0.03); }
.table-empty { text-align: center; padding: 40px; color: var(--text-light); }

/* ============ Status Badges ============ */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 12px; font-size: 11px; font-weight: 600; }
.badge-success { background: #e8f5e9; color: var(--success); }
.badge-warning { background: #fff8e1; color: #f57c00; }
.badge-danger { background: #ffebee; color: var(--danger); }
.badge-info { background: #e3f2fd; color: var(--info); }
.badge-gray { background: #f0f0f0; color: var(--text-gray); }
.badge-primary { background: #e0f2f1; color: var(--primary); }

/* ============ Log Panel ============ */
.log-panel { background: var(--bg-dark); border-radius: 8px; overflow: hidden; }
.log-header { padding: 10px 16px; background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: space-between; }
.log-header h4 { color: #fff; font-size: 13px; font-weight: 500; }
.log-body { padding: 12px; max-height: 500px; overflow-y: auto; font-family: 'Monaco', 'Consolas', monospace; font-size: 11px; }
.log-entry { margin-bottom: 8px; padding: 10px; border-radius: 4px; }
.log-entry.incoming { background: rgba(0,168,168,0.1); border-left: 3px solid var(--accent); }
.log-entry.outgoing { background: rgba(40,167,69,0.1); border-left: 3px solid var(--success); }
.log-entry.error { background: rgba(220,53,69,0.1); border-left: 3px solid var(--danger); }
.log-entry.info { background: rgba(255,193,7,0.1); border-left: 3px solid var(--warning); }
.log-entry .log-time { color: #888; font-size: 10px; }
.log-entry .log-title { color: #fff; font-weight: 600; font-size: 12px; margin: 2px 0; display: flex; align-items: center; gap: 8px; }
.log-entry .log-title .log-direction { font-size: 10px; padding: 1px 6px; border-radius: 3px; }
.log-entry .log-title .log-direction.in { background: var(--accent); color: #fff; }
.log-entry .log-title .log-direction.out { background: var(--success); color: #fff; }
.log-entry pre { color: #ccc; white-space: pre-wrap; word-wrap: break-word; margin: 4px 0 0; font-size: 11px; max-height: 200px; overflow-y: auto; }

/* ============ Tabs ============ */
.tabs { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 16px; }
.tab { padding: 10px 20px; color: var(--text-gray); font-weight: 500; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.15s; font-size: 13px; }
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ============ Charger Cards ============ */
.charger-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px;
  transition: all 0.2s; cursor: pointer;
}
.charger-card:hover { border-color: var(--primary); box-shadow: 0 4px 12px rgba(61,107,107,0.12); }
.charger-card .charger-id { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.charger-card .charger-model { font-size: 12px; color: var(--text-gray); }
.charger-card .charger-evses { margin-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; }
.evse-chip { display: inline-flex; align-items: center; gap: 4px; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.evse-chip.Available { background: #e8f5e9; color: var(--success); }
.evse-chip.Occupied { background: #e3f2fd; color: var(--info); }
.evse-chip.Reserved { background: #fff8e1; color: #f57c00; }
.evse-chip.Unavailable { background: #f0f0f0; color: var(--text-gray); }
.evse-chip.Faulted { background: #ffebee; color: var(--danger); }

/* ============ Modal ============ */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center;
  z-index: 1000; opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.modal-overlay.show { opacity: 1; pointer-events: auto; }
.modal { background: #fff; border-radius: 8px; width: 90%; max-width: 600px; max-height: 80vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-gray); padding: 4px; }
.modal-body { padding: 20px; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ============ Toast ============ */
.toast-container { position: fixed; top: 64px; right: 24px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 20px; border-radius: 6px; color: #fff; font-size: 13px; font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15); animation: slideIn 0.3s ease;
  display: flex; align-items: center; gap: 8px; max-width: 400px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); color: #333; }
.toast.info { background: var(--info); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ============ OCPP Console (JSON Editor) ============ */
.json-editor {
  width: 100%; min-height: 200px; padding: 12px;
  background: var(--bg-dark); color: #e0e0e0; border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px; font-family: 'Monaco', 'Consolas', monospace; font-size: 12px;
  resize: vertical; tab-size: 2;
}
.json-editor:focus { outline: none; border-color: var(--accent); }

/* ============ Action Cards ============ */
.action-card {
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 16px; transition: all 0.2s;
}
.action-card:hover { border-color: var(--primary); }
.action-card h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; display: flex; align-items: center; gap: 6px; }
.action-card h4 i { color: var(--primary); }
.action-card p { font-size: 12px; color: var(--text-gray); margin-bottom: 12px; }

/* ============ Tree View (EVSE) ============ */
.tree { list-style: none; padding-left: 0; }
.tree li { padding: 6px 0; }
.tree .tree-node { display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 4px; cursor: pointer; }
.tree .tree-node:hover { background: var(--bg-gray); }
.tree .tree-node i { color: var(--primary); }
.tree .tree-children { padding-left: 24px; border-left: 1px dashed var(--border); margin-left: 10px; }

/* ============ Empty State ============ */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-light); }
.empty-state i { font-size: 48px; margin-bottom: 16px; display: block; }
.empty-state h3 { font-size: 16px; color: var(--text-gray); margin-bottom: 8px; }
.empty-state p { font-size: 13px; }

/* ============ Action Description Panel ============ */
.action-desc-panel {
  background: #f8f9fc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}
.action-desc-panel .desc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.action-desc-panel .desc-header h4 {
  font-size: 15px;
  font-weight: 600;
  margin: 0;
  color: var(--primary-dark);
}
.action-desc-panel .desc-summary {
  font-size: 13px;
  color: var(--text-dark);
  margin-bottom: 8px;
  font-weight: 500;
}
.action-desc-panel .desc-detail {
  font-size: 12px;
  color: var(--text-gray);
  line-height: 1.7;
  margin-bottom: 12px;
}
.action-desc-panel .desc-section {
  margin-bottom: 12px;
}
.action-desc-panel .desc-section h5 {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.param-list {}
.param-item {
  padding: 6px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.param-item:last-child { border-bottom: none; }
.param-name {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}
.param-name code {
  font-weight: 600;
  font-size: 12px;
  color: var(--primary-dark);
}
.param-desc {
  font-size: 12px;
  color: var(--text-gray);
  margin-left: 8px;
}
.param-values, .param-example {
  font-size: 11px;
  color: var(--text-light);
  margin-left: 8px;
  margin-top: 2px;
}
.param-values code, .param-example code {
  background: rgba(0,0,0,0.05);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 11px;
}
.param-children {
  margin-left: 16px;
  border-left: 2px solid var(--border);
  padding-left: 12px;
  margin-top: 4px;
}

/* Action card enhanced descriptions */
.action-desc-brief {
  margin-bottom: 12px;
}
.action-desc-brief .action-summary {
  font-size: 12px;
  color: var(--text-gray);
  margin-bottom: 4px;
}
.action-details {
  font-size: 12px;
  color: var(--text-gray);
  margin-top: 4px;
}
.action-details summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 11px;
  font-weight: 500;
  user-select: none;
}
.action-details summary:hover { color: var(--primary); }
.action-details p { margin-top: 6px; line-height: 1.6; }
.action-usecase { font-style: italic; color: var(--text-light); }
.response-docs {
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-gray);
}
.response-docs summary {
  cursor: pointer;
  color: var(--text-light);
  font-size: 11px;
  user-select: none;
}
.response-docs summary:hover { color: var(--primary); }
.response-docs .param-list { margin-top: 4px; }

/* ============ Mobile Menu Button ============ */
.mobile-menu-btn {
  display: none;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
  margin-right: 8px;
  line-height: 1;
}
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 52px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 149;
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .sidebar {
    display: none;
    z-index: 150;
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
  }
  .sidebar.open { display: block; }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; padding: 16px 12px !important; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }

  /* Demo Dashboard mobile overrides */
  .demo-counters { grid-template-columns: repeat(3, 1fr) !important; gap: 8px !important; }
  .demo-counters .counter-card { padding: 10px 8px !important; }
  .demo-counters .counter-card div:first-child { font-size: 22px !important; }

  /* Main grid: stack vertically */
  .demo-main-grid { grid-template-columns: 1fr !important; }

  /* Charger grid: fewer columns */
  #demo-grid { grid-template-columns: repeat(10, 1fr) !important; gap: 3px !important; }

  /* Cards */
  .card { margin-bottom: 12px; }
  .card-header { font-size: 13px; padding: 10px 12px; }
  .card-body { padding: 10px 12px; }
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); }