:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1525;
  --bg-tertiary: #161d2e;
  --border-color: #1e2d45;
  --border-light: #243453;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #4a5568;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-orange: #f97316;
  --accent-yellow: #eab308;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.6;
}

/* ─── Header ─── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 60px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 200px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

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

.logo-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.tab-switcher {
  display: flex;
  gap: 4px;
  background: var(--bg-tertiary);
  padding: 4px;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover {
  color: var(--text-primary);
  background: var(--border-color);
}
.tab-btn.active {
  background: var(--accent-blue);
  color: #fff;
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 160px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--transition);
}
.status-dot.ready { background: var(--accent-green); box-shadow: 0 0 6px var(--accent-green); }
.status-dot.ingesting { background: var(--accent-orange); animation: pulse 1.2s infinite; }
.status-dot.error { background: var(--accent-red); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.status-text {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* ─── Main Layout ─── */
.main-container {
  display: flex;
  height: calc(100vh - 60px);
  overflow: hidden;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 99;
}

/* ─── Sidebar ─── */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 16px 12px;
}

.sidebar-section {
  margin-bottom: 20px;
}

.sidebar-label {
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 1.2px;
  margin-bottom: 10px;
  padding-left: 4px;
}

.filter-group {
  margin-bottom: 12px;
}
.filter-title {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}
.filter-check {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  transition: background var(--transition);
}
.filter-check:hover { background: var(--bg-tertiary); }
.filter-check input { accent-color: var(--accent-blue); cursor: pointer; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.stat-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 10px 8px;
  text-align: center;
}
.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--accent-cyan);
}
.stat-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ingest-progress {
  margin-top: 8px;
}
.progress-bar-wrap {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 4px;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 2px;
  transition: width 0.3s ease;
}
.progress-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-full { width: 100%; }
.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}
.btn-primary:hover { background: var(--accent-blue-hover); border-color: var(--accent-blue-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover { border-color: var(--accent-blue); color: var(--accent-blue); }
.btn-ghost {
  background: none;
  color: var(--text-secondary);
  border-color: var(--border-color);
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-tertiary); }

/* ─── Views ─── */
.view {
  display: none;
  flex: 1;
  overflow: hidden;
  flex-direction: column;
}
.view.active { display: flex; }

/* ─── Chat View ─── */
#viewChat {
  position: relative;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar { width: 6px; }
.messages-container::-webkit-scrollbar-track { background: transparent; }
.messages-container::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* ─── Welcome Screen ─── */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px 20px;
  text-align: center;
  min-height: 400px;
}
.welcome-logo {
  margin-bottom: 20px;
  filter: drop-shadow(0 0 20px rgba(59,130,246,0.3));
}
.welcome-title {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}
.welcome-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 480px;
  margin-bottom: 32px;
}
.example-queries {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-width: 640px;
  width: 100%;
}
.example-query {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 10px 14px;
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
  line-height: 1.4;
}
.example-query:hover {
  border-color: var(--accent-blue);
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

/* ─── Messages ─── */
.message {
  display: flex;
  gap: 12px;
  animation: fadeInUp 0.3s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.user {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-weight: 600;
}
.message.user .message-avatar {
  background: var(--accent-blue);
  color: #fff;
}
.message.assistant .message-avatar {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  color: #fff;
}

.message-content {
  max-width: 75%;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message.user .message-content {
  align-items: flex-end;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  line-height: 1.7;
}

.message.user .message-bubble {
  background: var(--accent-blue);
  color: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
}

.message.assistant .message-bubble {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 4px;
}

/* Markdown styling inside bubbles */
.message-bubble p { margin: 0 0 8px; }
.message-bubble p:last-child { margin-bottom: 0; }
.message-bubble ul, .message-bubble ol { padding-left: 20px; margin: 4px 0 8px; }
.message-bubble li { margin: 3px 0; }
.message-bubble code {
  font-family: var(--font-mono);
  background: rgba(0,0,0,0.3);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12px;
}
.message-bubble pre {
  background: rgba(0,0,0,0.4);
  padding: 12px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 8px 0;
}
.message-bubble strong { color: var(--accent-cyan); }
.message-bubble h1, .message-bubble h2, .message-bubble h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-blue);
  margin: 8px 0 4px;
}

/* Sources */
.message-sources {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.source-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}
.source-chip:hover { opacity: 0.85; transform: translateY(-1px); }

.source-chip.nvd { background: rgba(59,130,246,0.15); border-color: rgba(59,130,246,0.3); color: var(--accent-blue); }
.source-chip.owasp { background: rgba(6,182,212,0.15); border-color: rgba(6,182,212,0.3); color: var(--accent-cyan); }

.badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
}
.badge-critical { background: rgba(239,68,68,0.2); color: var(--accent-red); border: 1px solid rgba(239,68,68,0.3); }
.badge-high { background: rgba(249,115,22,0.2); color: var(--accent-orange); border: 1px solid rgba(249,115,22,0.3); }
.badge-medium { background: rgba(234,179,8,0.2); color: var(--accent-yellow); border: 1px solid rgba(234,179,8,0.3); }
.badge-low { background: rgba(16,185,129,0.2); color: var(--accent-green); border: 1px solid rgba(16,185,129,0.3); }

/* Message meta */
.message-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 4px;
  width: fit-content;
}
.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-blue);
  animation: typing 1.2s infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
  40% { opacity: 1; transform: scale(1); }
}

/* Follow-up suggestions */
.followup-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.followup-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}
.followup-btn:hover { border-color: var(--accent-blue); color: var(--accent-blue); }

/* ─── Input Area ─── */
.input-area {
  padding: 16px 24px 20px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.input-wrap {
  display: flex;
  gap: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 4px 4px 4px 16px;
  transition: border-color var(--transition);
}
.input-wrap:focus-within { border-color: var(--accent-blue); }

.chat-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  resize: none;
  max-height: 120px;
  padding: 8px 0;
}
.chat-input::placeholder { color: var(--text-muted); }

.send-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--accent-blue);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  align-self: flex-end;
  margin-bottom: 2px;
}
.send-btn:hover { background: var(--accent-blue-hover); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.input-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  text-align: right;
}
.input-hint kbd {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1px 4px;
  font-family: var(--font-mono);
  font-size: 10px;
}

/* ─── Eval View ─── */
#viewEval {
  overflow-y: auto;
}

.eval-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 24px;
}

.eval-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.eval-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.eval-subtitle {
  color: var(--text-secondary);
  font-size: 13px;
}

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

.eval-timestamp {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Empty state */
.eval-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.eval-empty h3 {
  font-size: 18px;
  margin: 16px 0 8px;
}
.eval-empty p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 32px;
}

.metric-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}
.metric-info-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 14px;
}
.metric-info-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--accent-cyan);
  margin-bottom: 4px;
  font-family: var(--font-mono);
}
.metric-info-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Metric cards */
.metric-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
}
.metric-card-name {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.metric-card-score {
  font-size: 36px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1;
}
.metric-card-bar {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 8px;
}
.metric-card-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1s ease;
}
.metric-card-label {
  font-size: 11px;
  font-weight: 600;
}
.label-excellent { color: var(--accent-green); }
.label-good { color: var(--accent-yellow); }
.label-needs { color: var(--accent-red); }

/* Chart section */
.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-section, .table-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.chart-wrap {
  max-height: 300px;
  display: flex;
  justify-content: center;
}

.chart-wrap canvas {
  max-height: 300px !important;
}

/* Eval table */
.table-wrap {
  overflow-x: auto;
}
.eval-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.eval-table th {
  text-align: left;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}
.eval-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.eval-table tr:last-child td { border-bottom: none; }
.eval-table td:first-child { color: var(--text-primary); max-width: 300px; }

.score-cell {
  font-family: var(--font-mono);
  font-weight: 600;
  border-radius: 4px;
  padding: 3px 8px !important;
  width: 80px;
  text-align: center;
}
.score-good { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.score-ok { background: rgba(234,179,8,0.15); color: var(--accent-yellow); }
.score-bad { background: rgba(239,68,68,0.15); color: var(--accent-red); }

/* Eval running */
.eval-running {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.eval-running-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow);
  animation: fadeInUp 0.2s ease;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}
.modal-title {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-cyan);
}
.modal-close {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.modal-close:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.modal-body {
  padding: 20px;
}
.modal-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}
.modal-row:last-child { border-bottom: none; }
.modal-row-key {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
}
.modal-row-value {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: right;
  max-width: 280px;
  word-break: break-word;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .header-left { min-width: auto; }
  .header-right { min-width: auto; }

  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform var(--transition);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }

  .example-queries { grid-template-columns: 1fr; }
  .metric-cards { grid-template-columns: repeat(2, 1fr); }
  .metric-info-grid { grid-template-columns: 1fr; }
  .tab-btn { padding: 6px 10px; font-size: 12px; }
  .logo-text { font-size: 16px; }
  .messages-container { padding: 16px; }
  .input-area { padding: 12px 16px; }
  .eval-container { padding: 20px 16px; }
}

@media (max-width: 480px) {
  .metric-cards { grid-template-columns: 1fr 1fr; }
  .tab-btn span { display: none; }
}