:root {
  --bg-body: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-light: #eff6ff;
  --accent-yellow: #ca8a04;
  --accent-yellow-light: #fefce8;
  --accent-yellow-border: #fde047;
  --accent-green: #16a34a;
  --accent-green-light: #f0fdf4;
  --accent-green-border: #86efac;
  --accent-red: #dc2626;
  --accent-red-light: #fef2f2;
  --accent-red-border: #fca5a5;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
}

body {
  background-color: var(--bg-body);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96) translateY(-10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes slideToast {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.panel-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px;
  width: 100%;
}

/* Header */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
  gap: 16px;
  animation: fadeIn 0.3s ease;
}

.panel-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.02em;
}

.panel-title-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-blue-light);
  color: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Cards */
.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.35s ease;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.panel-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-green {
  background: var(--accent-green-light);
  color: var(--accent-green);
  border: 1px solid var(--accent-green-border);
}

.badge-red {
  background: var(--accent-red-light);
  color: var(--accent-red);
  border: 1px solid var(--accent-red-border);
}

.badge-blue {
  background: var(--accent-blue-light);
  color: var(--accent-blue);
  border: 1px solid #bfdbfe;
}

.badge-yellow {
  background: var(--accent-yellow-light);
  color: var(--accent-yellow);
  border: 1px solid var(--accent-yellow-border);
}

.badge-dark {
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent-blue);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--accent-blue-hover);
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.btn-success {
  background: var(--accent-green);
  color: #ffffff;
}
.btn-success:hover {
  background: #15803d;
  box-shadow: 0 2px 6px rgba(22, 163, 74, 0.25);
}

.btn-danger {
  background: var(--accent-red);
  color: #ffffff;
}
.btn-danger:hover {
  background: #b91c1c;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.25);
}

.btn-warning {
  background: #eab308;
  color: #000000;
}
.btn-warning:hover {
  background: #ca8a04;
}

.btn-secondary {
  background: #ffffff;
  color: var(--text-main);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-subtle);
  border-color: var(--border-hover);
}

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 6px;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 7px;
}

.form-label span {
  font-weight: 400;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.range-slider {
  width: 100%;
  height: 6px;
  background: #e2e8f0;
  border-radius: 4px;
  outline: none;
  accent-color: var(--accent-blue);
  cursor: pointer;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.panel-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: #ffffff;
}

.panel-table th {
  background: var(--bg-subtle);
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.panel-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13.5px;
  vertical-align: middle;
}

.panel-table tr:last-child td {
  border-bottom: none;
}

.panel-table tr:hover td {
  background: #f8fafc;
}

/* Dropdown Menu */
.action-dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.dropdown-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-main);
  background: var(--bg-subtle);
}

.dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  min-width: 160px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  margin-top: 6px;
  padding: 4px;
  animation: fadeIn 0.15s ease;
}

.dropdown-menu.show {
  display: block;
}

.dropdown-item {
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  border-radius: 6px;
  transition: background 0.12s;
}

.dropdown-item:hover {
  background: var(--bg-subtle);
  color: var(--accent-blue);
}

.dropdown-item.text-danger:hover {
  background: var(--accent-red-light);
  color: var(--accent-red);
}

/* Tabs */
.panel-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.tab-link {
  padding: 10px 16px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 13.5px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: all 0.15s;
  border-radius: 6px 6px 0 0;
}

.tab-link:hover {
  color: var(--text-main);
  background: var(--bg-subtle);
}

.tab-link.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  background: #ffffff;
}

/* Modals */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 480px;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Vector SVG Icons */
.icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
  display: inline-block;
  flex-shrink: 0;
}

.icon-lg {
  width: 20px;
  height: 20px;
}

/* Toast */
#toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  display: none;
  z-index: 9999;
  background: var(--accent-green);
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  animation: slideToast 0.25s ease;
}

@media (max-width: 768px) {
  .panel-header { flex-direction: column; align-items: flex-start; }
  .panel-container { padding: 14px 12px; }
  .panel-card { padding: 16px; }
}