:root {
  --bg-base: #0a0e17;
  --bg-surface: #111726;
  --bg-card: rgba(22, 30, 49, 0.7);
  --bg-card-hover: rgba(28, 38, 62, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #10b981;

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent-emerald: #10b981;
  --accent-sky: #0ea5e9;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --font-main: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-main);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

/* LAYOUT */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 280px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 24px;
  border-bottom: 1px solid var(--border-color);
}

.brand-logo {
  font-size: 28px;
  background: rgba(16, 185, 129, 0.15);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #fff;
}

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

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 24px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(14, 165, 233, 0.1) 100%);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-weight: 600;
}

.nav-icon {
  font-size: 18px;
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.system-chip {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text-muted);
}

/* MAIN CONTENT */
.main-content {
  flex: 1;
  padding: 32px 40px;
  overflow-y: auto;
  background: radial-gradient(circle at 80% 10%, rgba(16, 185, 129, 0.04) 0%, transparent 40%);
}

.top-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 28px;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.page-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.status-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
}

/* PANELS & CARDS */
.panel {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.panel-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-title {
  font-size: 18px;
  font-weight: 600;
}

.panel-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* KPIS */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.kpi-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.kpi-value {
  font-size: 32px;
  font-weight: 700;
  margin: 6px 0;
  font-family: var(--font-mono);
}

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

.text-emerald { color: var(--accent-emerald); }
.text-sky { color: var(--accent-sky); }
.text-purple { color: var(--accent-purple); }
.text-amber { color: var(--accent-amber); }

/* GRIDS */
.grid-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }

.chart-container {
  position: relative;
  height: 280px;
  width: 100%;
}

/* BUTTONS & FORMS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.form-group label {
  font-size: 13px;
  color: var(--text-secondary);
}

.input-field {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #fff;
  font-family: var(--font-main);
  font-size: 14px;
  outline: none;
}

.input-field:focus {
  border-color: var(--border-focus);
}

/* CLIENTS GRID */
.clients-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.client-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: all 0.2s ease;
}

.client-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(16, 185, 129, 0.3);
}

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

.client-card-title {
  font-weight: 600;
  font-size: 16px;
}

.client-stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.client-stat-val {
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 500;
}

/* TABLES */
.table-responsive {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.data-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

/* INFERENCE UPLOAD & DUAL CARDS */
.upload-zone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.2s ease;
}

.upload-zone:hover {
  border-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.03);
}

.file-input {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-icon {
  font-size: 44px;
  margin-bottom: 8px;
}

.upload-text {
  font-size: 15px;
  font-weight: 600;
}

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

.preview-thumb {
  max-height: 180px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
  border: 1px solid var(--border-color);
}

.hidden { display: none; }

.action-center {
  display: flex;
  justify-content: center;
}

.dual-results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.diagnosis-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  position: relative;
}

.card-centralized {
  border-top: 4px solid var(--accent-sky);
}

.card-federated {
  border-top: 4px solid var(--accent-emerald);
}

.card-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.badge-centralized {
  background: rgba(14, 165, 233, 0.2);
  color: var(--accent-sky);
}

.badge-federated {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.diag-disease {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.diag-confidence-meter {
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: 8px;
}

.diag-confidence-bar {
  height: 100%;
  background: var(--accent-sky);
  border-radius: 5px;
  transition: width 0.5s ease;
}

.diag-confidence-bar.bar-fed {
  background: var(--accent-emerald);
}

.diag-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
}

.top3-box {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.top3-title {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
  margin-bottom: 6px;
}

.top3-list {
  list-style: none;
  font-size: 13px;
}

.top3-list li {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.top3-list li:last-child {
  border-bottom: none;
}

/* TABS VISIBILITY */
.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

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