:root {
  --bg: #0f1419;
  --bg-card: #1a1f2a;
  --bg-sidebar: #141922;
  --bg-hover: #242a38;
  --text: #e4e8ef;
  --text-muted: #8892a8;
  --accent: #4ade80;
  --accent-dim: #22c55e;
  --danger: #f87171;
  --warning: #fbbf24;
  --border: #2a3040;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
}

/* Sidebar */
.sidebar {
  width: 220px;
  min-width: 220px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
}

.sidebar-header {
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}

.logo { font-size: 24px; }

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
}

.nav-items {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.15s;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--accent);
  color: #000;
  font-weight: 600;
}

.nav-icon { font-size: 16px; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
}

/* Main */
.main {
  flex: 1;
  padding: 24px;
  max-width: 1100px;
  overflow-y: auto;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.tab-header { margin-bottom: 24px; }
.tab-header h1 { font-size: 24px; font-weight: 700; }
.subtitle { color: var(--text-muted); font-size: 14px; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--text);
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.kpi-card.highlight {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(74,222,128,0.1), transparent);
}

.kpi-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.kpi-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-card.skeleton .kpi-value { color: var(--text-muted); }

/* Recovery Bar */
.recovery-bar-container {
  margin: 16px 0;
}

.recovery-bar-track {
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

.recovery-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 12px;
  transition: width 0.8s ease;
  min-width: 2px;
}

.recovery-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.recovery-percent {
  text-align: right;
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
}

.recovery-details {
  display: flex;
  gap: 24px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.recovery-stat .stat-label { color: var(--text-muted); }

/* Charts */
.chart-container {
  position: relative;
  height: 280px;
}
.chart-container-sm { height: 240px; }

/* Quick Stats */
.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.stat-icon { font-size: 20px; display: block; margin-bottom: 6px; }
.stat-val { font-size: 20px; font-weight: 700; display: block; }
.stat-desc { font-size: 11px; color: var(--text-muted); margin-top: 2px; }

/* Inventory Grid */
.inventory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.inv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.inv-card.available { border-color: var(--accent); }
.inv-card.sold { border-color: var(--danger); }
.inv-card.reserved { border-color: var(--warning); }

.inv-count { font-size: 28px; font-weight: 700; }
.inv-card.skeleton .inv-count { color: var(--text-muted); }
.inv-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Markdown Content */
.markdown-content {
  line-height: 1.7;
  font-size: 14px;
  overflow-wrap: break-word;
}

.markdown-content h1 { font-size: 22px; margin: 20px 0 12px; color: var(--accent); }
.markdown-content h2 { font-size: 18px; margin: 18px 0 10px; color: var(--accent); }
.markdown-content h3 { font-size: 15px; margin: 14px 0 8px; color: var(--text); }
.markdown-content p { margin: 8px 0; }
.markdown-content ul, .markdown-content ol { margin: 8px 0; padding-left: 20px; }
.markdown-content li { margin: 4px 0; }
.markdown-content code {
  background: rgba(74,222,128,0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--accent);
}
.markdown-content pre {
  background: #0a0e14;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  margin: 12px 0;
}
.markdown-content pre code { background: none; padding: 0; }
.markdown-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  margin: 12px 0;
  color: var(--text-muted);
}
.markdown-content table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 13px; }
.markdown-content th, .markdown-content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.markdown-content th { background: var(--bg-hover); font-weight: 600; }
.markdown-content hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* Doc List */
.doc-list { display: flex; flex-direction: column; gap: 8px; }
.doc-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.doc-item:hover { background: var(--bg-hover); }
.doc-name { font-weight: 600; font-size: 14px; }
.doc-meta { font-size: 12px; color: var(--text-muted); }
.doc-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 8px;
  display: none;
}
.doc-preview.active { display: block; }

/* Loading */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  color: var(--text-muted);
}
.loading-sm {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px;
  color: var(--text-muted);
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error */
.error-state {
  text-align: center;
  padding: 60px 20px;
}
.error-state.hidden { display: none; }
.error-icon { font-size: 48px; display: block; margin-bottom: 16px; }
.error-state h2 { margin-bottom: 8px; }
.error-state p { color: var(--text-muted); margin-bottom: 16px; }
.btn {
  background: var(--accent);
  color: #000;
  border: none;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent-dim); }

/* Menu Toggle (mobile) */
.menu-toggle {
  display: none;
  position: fixed;
  bottom: 16px;
  right: 16px;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 50%;
  font-size: 22px;
  cursor: pointer;
  z-index: 200;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -240px;
    transition: left 0.25s;
  }
  .sidebar.open { left: 0; }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .main { padding: 16px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .quick-stats { grid-template-columns: repeat(2, 1fr); }
  .inventory-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Login Overlay */
.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}
.login-overlay.hidden { display: none; }
.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.login-header { margin-bottom: 24px; }
.login-logo { font-size: 48px; display: block; margin-bottom: 12px; }
.login-box h2 { font-size: 20px; color: var(--text); margin-bottom: 6px; }
.login-subtitle { font-size: 13px; color: var(--text-muted); }
.login-form { display: flex; flex-direction: column; gap: 12px; }
.login-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 15px;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.login-input:focus { border-color: var(--accent); }
.login-input::placeholder { color: var(--text-muted); }
.login-btn {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.login-btn:hover { background: var(--accent-dim); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.login-error { font-size: 13px; color: var(--danger); min-height: 20px; }

@media (max-width: 480px) {
  .login-box { padding: 28px 20px; margin: 0 16px; }
}