:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.82);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  
  --border-color: rgba(226, 232, 240, 0.9);
  --border-subtle: rgba(241, 245, 249, 0.9);
  --border-glow: rgba(79, 70, 229, 0.25);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #6366f1 50%, #818cf8 100%);
  --accent-cyan: #0284c7;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  
  --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.04), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
  --shadow-hover: 0 12px 30px -4px rgba(15, 23, 42, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.03);
  --shadow-card: 0 1px 3px 0 rgba(15, 23, 42, 0.04), 0 1px 2px -1px rgba(15, 23, 42, 0.03);
  --transition-smooth: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(79, 70, 229, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(2, 132, 199, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(248, 250, 252, 1) 0%, transparent 80%);
  background-attachment: fixed;
}

/* Container */
.app-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 28px 32px 64px;
}

/* Header */
header.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 28px;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--text-main);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.brand-logo-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 2.2;
}

.brand-info h1 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--text-main);
}

.brand-info p {
  font-size: 13px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.campaign-selector-wrapper {
  position: relative;
  min-width: 240px;
}

select.campaign-select {
  width: 100%;
  padding: 10px 16px;
  padding-right: 36px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  appearance: none;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-card);
}

select.campaign-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-dim);
  display: flex;
  align-items: center;
}

.select-arrow svg {
  width: 14px;
  height: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
  text-decoration: none;
}

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

.btn-primary {
  background: var(--text-main);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.12);
}

.btn-primary:hover {
  background: #1e293b;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.16);
}

.btn-secondary {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  box-shadow: var(--shadow-card);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

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

.btn-sm svg {
  width: 14px;
  height: 14px;
}

/* Glassmorphism Campaign Banner */
.campaign-banner {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  margin-bottom: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  box-shadow: var(--shadow-subtle);
  position: relative;
}

.campaign-details {
  display: flex;
  align-items: center;
  gap: 16px;
}

.platform-badge-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.platform-badge-box svg {
  width: 22px;
  height: 22px;
}

.platform-badge-box.instagram { color: #e1306c; background: #fdf2f8; border-color: #fbcfe8; }
.platform-badge-box.youtube { color: #dc2626; background: #fef2f2; border-color: #fecaca; }
.platform-badge-box.facebook { color: #2563eb; background: #eff6ff; border-color: #bfdbfe; }
.platform-badge-box.tiktok { color: #0f172a; background: #f8fafc; border-color: #e2e8f0; }

.campaign-meta h2 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.type-pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: #f1f5f9;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.3px;
  border: 1px solid var(--border-color);
}

.campaign-sub-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.campaign-sub-info a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.campaign-sub-info a:hover {
  text-decoration: underline;
}

.banner-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Glassmorphism KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-subtle);
  transition: var(--transition-smooth);
}

.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  background: var(--bg-card-hover);
}

.kpi-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.kpi-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kpi-icon-box {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  color: var(--text-muted);
}

.kpi-icon-box svg {
  width: 16px;
  height: 16px;
}

.kpi-icon-box.views { background: #eef2ff; color: #4f46e5; }
.kpi-icon-box.unique { background: #f0fdf4; color: #059669; }
.kpi-icon-box.likes { background: #fff1f2; color: #e11d48; }
.kpi-icon-box.comments { background: #fffbeb; color: #d97706; }
.kpi-icon-box.viral { background: #f0f9ff; color: #0284c7; }

.kpi-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
  color: var(--text-main);
}

.kpi-footer {
  font-size: 12px;
  color: var(--text-muted);
}

.kpi-trend-up {
  color: var(--accent-emerald);
  font-weight: 600;
}

/* Tabs Navigation */
.tabs-header {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(241, 245, 249, 0.7);
  padding: 5px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 22px;
  overflow-x: auto;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.tab-btn svg {
  width: 15px;
  height: 15px;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.6);
}

.tab-btn.active {
  background: #ffffff;
  color: var(--text-main);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
}

/* Tab Pane */
.tab-pane {
  display: none;
  animation: fadeIn 0.2s ease forwards;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glass Panels */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-subtle);
  margin-bottom: 24px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 14px;
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.panel-title svg {
  width: 18px;
  height: 18px;
  color: var(--accent-primary);
}

/* Data Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

table.data-table th {
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  background: #f8fafc;
}

table.data-table td {
  padding: 14px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

table.data-table tr:hover td {
  background: rgba(248, 250, 252, 0.8);
}

.rank-badge {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.rank-1 { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.rank-2 { background: #f1f5f9; color: #334155; border: 1px solid #cbd5e1; }
.rank-3 { background: #ffedd5; color: #9a3412; border: 1px solid #fed7aa; }
.rank-default { background: #f8fafc; color: var(--text-muted); border: 1px solid #e2e8f0; }

.member-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.member-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  color: #4f46e5;
}

.member-meta-title {
  font-weight: 700;
  color: var(--text-main);
}

.member-meta-badge {
  font-size: 11px;
  color: var(--text-muted);
}

.score-pill {
  font-size: 12px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  background: #eef2ff;
  color: #4338ca;
  border: 1px solid #c7d2fe;
  display: inline-block;
}

.code-badge {
  background: #f8fafc;
  padding: 3px 7px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

/* Referral Hub Cards */
.referral-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}

.ref-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
}

.ref-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.ref-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.ref-card-info h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 2px;
}

.ref-card-info p {
  font-size: 12px;
  color: var(--text-muted);
}

.ref-link-box {
  background: #f8fafc;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.ref-link-text {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  color: var(--accent-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ref-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Tree Container */
.tree-container {
  width: 100%;
  height: 520px;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

#tree-canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
}

#tree-canvas:active {
  cursor: grabbing;
}

.tree-controls {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 8px;
  z-index: 10;
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

@media (max-width: 960px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-subtle);
}

.chart-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.chart-title svg {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
}

/* Activity Stream */
.activity-stream {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 500px;
  overflow-y: auto;
  padding-right: 6px;
}

.activity-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.activity-item:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.activity-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.activity-icon-box {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.activity-icon-box svg {
  width: 15px;
  height: 15px;
}

.activity-icon-box.view { background: #eef2ff; color: #4f46e5; }
.activity-icon-box.like { background: #fff1f2; color: #e11d48; }
.activity-icon-box.comment { background: #fffbeb; color: #d97706; }
.activity-icon-box.subref { background: #f0fdf4; color: #059669; }

.activity-desc {
  font-size: 13px;
  color: var(--text-main);
}

.activity-desc strong {
  color: var(--text-main);
  font-weight: 700;
}

.activity-time {
  font-size: 11px;
  color: var(--text-dim);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}

.modal-backdrop.active {
  display: flex;
  animation: fadeIn 0.15s ease forwards;
}

.modal-window {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  padding: 28px;
  box-shadow: 0 20px 40px -8px rgba(15, 23, 42, 0.16);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
}

.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-modal-btn:hover {
  color: var(--text-main);
  background: #f1f5f9;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 10px 12px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
  transition: var(--transition-smooth);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.form-help {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px -4px rgba(15, 23, 42, 0.12);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.qr-modal-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.qr-box {
  background: #ffffff;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  display: inline-block;
  box-shadow: var(--shadow-card);
}

/* Live badge */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-emerald);
  background: #f0fdf4;
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid #bbf7d0;
}

.live-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
}

@media (max-width: 768px) {
  .app-container {
    padding: 16px;
  }
  header.app-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-actions {
    width: 100%;
    flex-direction: column;
  }
  .campaign-selector-wrapper {
    width: 100%;
  }
  .campaign-banner {
    flex-direction: column;
    align-items: flex-start;
  }
}