/* ═══════════════════════════════════════════════════════
   DOE Lab — Scientific Modern Theme
   Color: Deep navy + cyan accents + light content
   ═══════════════════════════════════════════════════════ */
:root {
  --sidebar-bg: #0a0e1a;
  --sidebar-hover: #131927;
  --sidebar-active: #0c1425;
  --header-bg: #0d1220;
  --content-bg: #f0f4f8;
  --card-bg: #ffffff;
  --chatbot-bg: #0d1220;
  --chatbot-msg-user: #1a3a5c;
  --chatbot-msg-bot: #162233;
  --accent: #00c8e0;
  --accent-glow: rgba(0, 200, 224, 0.25);
  --accent-secondary: #6366f1;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-light: #e2e8f0;
  --text-muted-light: #7d8da6;
  --text-dark: #1e293b;
  --text-muted-dark: #64748b;
  --border-light: #e2e8f0;
  --border-dark: #1a2538;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.08), 0 8px 32px rgba(0,0,0,0.04);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--content-bg);
  color: var(--text-dark);
  display: grid;
  grid-template-columns: 240px 1fr 340px;
  grid-template-rows: 56px 1fr;
  height: 100vh;
  overflow: hidden;
}

/* ─── HEADER ─── */
.header {
  grid-column: 1 / -1;
  background: var(--header-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  border-bottom: 1px solid var(--border-dark);
  z-index: 100;
}
.header-logo {
  display: flex; align-items: center; gap: 10px;
}
.header-logo svg { width: 28px; height: 28px; }
.header-logo h1 {
  font-size: 17px; font-weight: 700; color: var(--text-light);
  letter-spacing: -0.3px;
}
.header-logo h1 span { color: var(--accent); }
.header-breadcrumb {
  font-size: 13px; color: var(--text-muted-light);
}
.header-breadcrumb a { color: var(--text-muted-light); text-decoration: none; }
.header-breadcrumb a:hover { color: var(--accent); }
.header-breadcrumb .sep { margin: 0 6px; opacity: 0.4; }
.header-breadcrumb .current { color: var(--text-light); font-weight: 500; }
.header-right { display: flex; align-items: center; gap: 16px; }
.header-badge {
  background: rgba(0,200,224,0.12); color: var(--accent);
  font-size: 11px; font-weight: 600; padding: 4px 10px;
  border-radius: 20px; letter-spacing: 0.5px;
}
.header-btn {
  background: none; border: 1px solid var(--border-dark);
  color: var(--text-muted-light); width: 34px; height: 34px;
  border-radius: 8px; cursor: pointer; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.header-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ─── SIDEBAR ─── */
.sidebar {
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-dark);
  padding: 20px 12px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 6px;
}
.sidebar-group {
  margin-bottom: 8px;
}
.sidebar-group-title {
  font-size: 10px; font-weight: 700; color: var(--text-muted-light);
  letter-spacing: 1.2px; text-transform: uppercase;
  padding: 8px 12px 6px; opacity: 0.6;
}
.sidebar-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  cursor: pointer; transition: all 0.15s;
  color: var(--text-muted-light); font-size: 13px; font-weight: 500;
  text-decoration: none; position: relative;
}
.sidebar-item:hover {
  background: var(--sidebar-hover); color: var(--text-light);
}
.sidebar-item.active {
  background: var(--sidebar-active); color: var(--accent);
}
.sidebar-item.active::before {
  content: ''; position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 20px; border-radius: 0 3px 3px 0;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}
.sidebar-icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-badge {
  margin-left: auto; font-size: 10px; font-weight: 600;
  padding: 2px 6px; border-radius: 10px;
}
.sidebar-badge.ready { background: rgba(16,185,129,0.15); color: var(--success); }
.sidebar-badge.soon { background: rgba(245,158,11,0.15); color: var(--warning); }
.sidebar-divider { height: 1px; background: var(--border-dark); margin: 12px 0; }

/* ─── MAIN CONTENT ─── */
.main {
  overflow-y: auto;
  padding: 28px 32px;
  position: relative;
}

/* ─── HOME HERO ─── */
.home-hero {
  background: linear-gradient(135deg, #0d1b2a 0%, #1b2838 50%, #0a1628 100%);
  border-radius: var(--radius);
  padding: 40px 44px;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}
.home-hero::before {
  content: ''; position: absolute; top: -40px; right: -20px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%; opacity: 0.5;
}
.home-hero h2 {
  font-size: 28px; font-weight: 800; color: var(--text-light);
  letter-spacing: -0.5px; margin-bottom: 8px;
  position: relative;
}
.home-hero h2 span { color: var(--accent); }
.home-hero p {
  font-size: 14px; color: var(--text-muted-light); max-width: 500px;
  line-height: 1.6; position: relative;
}
.home-hero .hero-stats {
  display: flex; gap: 32px; margin-top: 24px; position: relative;
}
.hero-stat {
  text-align: center;
}
.hero-stat .number { font-size: 28px; font-weight: 800; color: var(--accent); }
.hero-stat .label { font-size: 11px; color: var(--text-muted-light); margin-top: 2px; }

/* ─── MODULE CARDS GRID ─── */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.module-card {
  background: var(--card-bg); border-radius: var(--radius);
  padding: 0; cursor: pointer; transition: all 0.2s;
  box-shadow: var(--shadow); overflow: hidden;
  border: 1px solid var(--border-light);
}
.module-card:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.module-card-accent {
  height: 4px; width: 100%;
}
.module-card-body { padding: 20px; }
.module-card-icon {
  width: 42px; height: 42px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 14px;
}
.module-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.module-card p {
  font-size: 12px; color: var(--text-muted-dark); line-height: 1.5;
}
.module-card-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 14px;
}
.module-badge {
  font-size: 10px; font-weight: 600; padding: 3px 8px;
  border-radius: 10px; letter-spacing: 0.3px;
}
.module-badge.ready { background: rgba(16,185,129,0.1); color: var(--success); }
.module-badge.soon { background: rgba(245,158,11,0.1); color: var(--warning); }
.module-badge.future { background: rgba(100,116,139,0.1); color: var(--text-muted-dark); }
.module-card-arrow { color: var(--text-muted-dark); font-size: 14px; transition: transform 0.2s; }
.module-card:hover .module-card-arrow { transform: translateX(3px); color: var(--accent); }

/* ─── MODULE PAGE ─── */
.module-header {
  margin-bottom: 28px;
}
.module-header h2 {
  font-size: 22px; font-weight: 800; letter-spacing: -0.3px;
  margin-bottom: 6px;
}
.module-header p {
  font-size: 14px; color: var(--text-muted-dark); line-height: 1.5;
}
.module-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}

/* ─── CARDS ─── */
.card {
  background: var(--card-bg); border-radius: var(--radius);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 8px;
}
.card-header h3 { font-size: 14px; font-weight: 700; }
.card-header .card-icon { font-size: 16px; }
.card-body { padding: 20px; }

/* ─── UPLOAD ZONE ─── */
.upload-zone {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-sm);
  padding: 32px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #f8fafc;
}
.upload-zone:hover {
  border-color: var(--accent);
  background: rgba(0,200,224,0.03);
}
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0,200,224,0.06);
}
.upload-zone.uploaded {
  border-color: var(--success);
  background: rgba(16,185,129,0.03);
}
.upload-zone .upload-icon { font-size: 32px; margin-bottom: 10px; opacity: 0.6; }
.upload-zone .upload-text { font-size: 13px; color: var(--text-muted-dark); }
.upload-zone .upload-text strong { color: var(--accent); }
.upload-zone .upload-hint { font-size: 11px; color: var(--text-muted-dark); margin-top: 4px; opacity: 0.7; }

/* File loaded state */
.file-loaded {
  display: none;
  background: rgba(16,185,129,0.06); border: 1px solid rgba(16,185,129,0.2);
  border-radius: var(--radius-sm); padding: 12px 16px;
  margin-top: 12px;
}
.file-loaded.visible { display: flex; align-items: center; gap: 10px; }
.file-loaded .file-icon { font-size: 20px; }
.file-loaded .file-name { font-size: 13px; font-weight: 600; color: var(--success); }
.file-loaded .file-size { font-size: 11px; color: var(--text-muted-dark); }

/* Format hint */
.format-hint {
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.15);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-top: 16px;
}
.format-hint .hint-title {
  font-size: 12px; font-weight: 700; color: var(--accent-secondary);
  display: flex; align-items: center; gap: 6px; margin-bottom: 8px;
}
.format-hint code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--text-dark);
  background: rgba(99,102,241,0.08); padding: 2px 5px;
  border-radius: 4px;
}
.format-hint pre {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; color: var(--text-muted-dark);
  margin-top: 8px; line-height: 1.6;
  background: rgba(0,0,0,0.03); padding: 10px;
  border-radius: 6px;
}

/* ─── BUTTONS ─── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; cursor: pointer;
  border: none; transition: all 0.2s;
  font-family: inherit;
}
.btn:disabled {
  opacity: 0.5; cursor: not-allowed;
}
.btn-primary {
  background: var(--accent); color: #0a0e1a;
}
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent; color: var(--accent);
  border: 1px solid rgba(0,200,224,0.3);
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(0,200,224,0.06);
  border-color: var(--accent);
}
.btn-success {
  background: var(--success); color: white;
}
.btn-sm { padding: 7px 12px; font-size: 12px; }
.btn-row {
  display: flex; gap: 10px; margin-top: 16px;
}

/* ─── CONFIG ─── */
.config-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 12px;
}
.config-label {
  font-size: 13px; font-weight: 600; min-width: 120px;
}
.config-select, .config-input {
  padding: 8px 12px; border-radius: 6px;
  border: 1px solid var(--border-light);
  font-size: 13px; font-family: inherit;
  background: var(--card-bg); flex: 1;
}
.config-select:focus, .config-input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ─── PHASE TABS ─── */
.phase-tabs {
  display: flex; gap: 4px; margin-bottom: 20px;
  background: #f1f5f9; border-radius: var(--radius-sm);
  padding: 4px;
}
.phase-tab {
  flex: 1; text-align: center; padding: 10px;
  border-radius: 6px; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
  color: var(--text-muted-dark); background: transparent;
  border: none; font-family: inherit;
}
.phase-tab.active {
  background: var(--card-bg); color: var(--text-dark);
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* ─── FACTOR ROWS ─── */
.factor-row {
  background: #f8fafc; border-radius: var(--radius-sm);
  padding: 16px; margin-bottom: 12px;
  border: 1px solid var(--border-light);
}
.factor-row-header {
  font-size: 13px; font-weight: 700; color: var(--accent-secondary);
  margin-bottom: 10px;
}
.factor-fields { display: flex; gap: 12px; flex-wrap: wrap; }
.factor-field label,
.factor-fields label {
  display: block; font-size: 11px; font-weight: 600;
  color: var(--text-muted-dark); margin-bottom: 4px;
}

/* ─── DESIGN SUMMARY BOX ─── */
.design-summary-box {
  background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 8px;
  padding: 14px; margin-top: 16px;
}
.design-summary-box .summary-title {
  font-size: 13px; font-weight: 700; color: #166534; margin-bottom: 4px;
}
.design-summary-box .summary-detail {
  font-size: 12px; color: #15803d;
}

/* ─── RESULTS ─── */
.results-full { margin-top: 20px; }

.result-step {
  background: var(--card-bg); border-radius: var(--radius);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow);
  margin-bottom: 16px; overflow: hidden;
}
.result-step-header {
  padding: 14px 20px;
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid var(--border-light);
}
.result-step-number {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #0a0e1a;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.result-step-title { font-size: 14px; font-weight: 700; }
.result-step-body { padding: 20px; }

/* ─── TABLES ─── */
.anova-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.anova-table th {
  background: #f1f5f9; text-align: left; padding: 10px 14px;
  font-weight: 700; font-size: 12px; letter-spacing: 0.3px;
  border-bottom: 2px solid var(--border-light);
}
.anova-table td {
  padding: 10px 14px; border-bottom: 1px solid var(--border-light);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
}
.anova-table tr:last-child td { border-bottom: none; }
.p-significant {
  color: var(--success); font-weight: 700;
  background: rgba(16,185,129,0.08); padding: 2px 6px;
  border-radius: 4px;
}
.p-not-significant {
  color: var(--text-muted-dark);
}

/* Data preview */
.data-preview {
  width: 100%; border-collapse: collapse; font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
}
.data-preview th {
  background: var(--accent); color: #0a0e1a;
  padding: 8px 12px; font-weight: 600; text-align: left;
}
.data-preview td {
  padding: 7px 12px; border-bottom: 1px solid var(--border-light);
}
.data-preview tr:nth-child(even) { background: #f8fafc; }

/* ─── INTERPRETATION ─── */
.interpretation {
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex; gap: 12px; align-items: flex-start;
  line-height: 1.6; font-size: 13px;
}
.interpretation.significant {
  background: rgba(16,185,129,0.06);
  border: 1px solid rgba(16,185,129,0.2);
  color: #065f46;
}
.interpretation.not-significant {
  background: rgba(245,158,11,0.06);
  border: 1px solid rgba(245,158,11,0.2);
  color: #78350f;
}
.interpretation-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }

/* ─── CHART CONTAINER ─── */
.chart-container {
  background: #fafbfc;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
}
.chart-container img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

/* ─── CHATBOT PANEL ─── */
.chatbot {
  background: var(--chatbot-bg);
  border-left: 1px solid var(--border-dark);
  display: flex; flex-direction: column;
  overflow: hidden;
  min-height: 0;
}
.chatbot-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-dark);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}
.chatbot-header-left {
  display: flex; align-items: center; gap: 10px;
}
.chatbot-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}
.chatbot-title { font-size: 14px; font-weight: 700; color: var(--text-light); }
.chatbot-status {
  font-size: 11px; color: var(--success);
  display: flex; align-items: center; gap: 4px;
}
.chatbot-status::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--success); display: inline-block;
}
.chatbot-context {
  padding: 8px 18px;
  background: rgba(0,200,224,0.06);
  border-bottom: 1px solid var(--border-dark);
  font-size: 11px; color: var(--accent);
  display: flex; align-items: center; gap: 6px;
  flex-shrink: 0;
}
.chatbot-messages {
  flex: 1; overflow-y: auto;
  padding: 18px; display: flex; flex-direction: column; gap: 14px;
  min-height: 0;
}
.chat-msg {
  display: flex; gap: 10px; max-width: 90%;
}
.chat-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.chat-msg-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; flex-shrink: 0;
}
.chat-msg.bot .chat-msg-avatar {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
}
.chat-msg.user .chat-msg-avatar {
  background: #2d3748;
}
.chat-msg-bubble {
  padding: 10px 14px; border-radius: 12px;
  font-size: 13px; line-height: 1.55;
  overflow-wrap: break-word; word-break: break-word;
  max-height: 400px; overflow-y: auto;
}
.chat-msg.bot .chat-msg-bubble {
  background: var(--chatbot-msg-bot); color: var(--text-light);
  border-bottom-left-radius: 4px;
}
.chat-msg.user .chat-msg-bubble {
  background: var(--chatbot-msg-user); color: var(--text-light);
  border-bottom-right-radius: 4px;
}
.chat-suggestions {
  padding: 12px 18px;
  display: flex; flex-wrap: wrap; gap: 6px;
  border-top: 1px solid var(--border-dark);
  flex-shrink: 0;
}
.chat-suggestion {
  font-size: 11px; padding: 6px 12px;
  border-radius: 20px; background: rgba(0,200,224,0.08);
  color: var(--accent); cursor: pointer; transition: all 0.15s;
  border: 1px solid rgba(0,200,224,0.15);
  font-family: inherit;
}
.chat-suggestion:hover {
  background: rgba(0,200,224,0.15);
  border-color: var(--accent);
}
.chatbot-input {
  padding: 14px 18px;
  border-top: 1px solid var(--border-dark);
  display: flex; gap: 8px; align-items: flex-end;
  flex-shrink: 0;
}
.chatbot-input textarea {
  flex: 1; background: #1a2538; border: 1px solid var(--border-dark);
  border-radius: 8px; padding: 10px 14px;
  color: var(--text-light); font-size: 13px;
  font-family: inherit;
  resize: none;
  line-height: 1.4;
}
.chatbot-input textarea::placeholder { color: var(--text-muted-light); opacity: 0.5; }
.chatbot-input textarea:focus {
  outline: none; border-color: var(--accent);
}
.chatbot-input button {
  background: var(--accent); border: none;
  width: 38px; height: 38px; border-radius: 8px;
  cursor: pointer; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s; flex-shrink: 0;
}
.chatbot-input button:hover {
  box-shadow: 0 0 12px var(--accent-glow);
}
.chatbot-edit-prompt {
  padding: 8px 18px;
  border-top: 1px solid var(--border-dark);
  flex-shrink: 0;
}
.chatbot-edit-prompt button {
  font-size: 11px; color: var(--text-muted-light);
  background: none; border: none; cursor: pointer;
  opacity: 0.6; padding: 0;
  display: flex; align-items: center; gap: 4px;
  font-family: inherit;
}
.chatbot-edit-prompt button:hover { opacity: 1; color: var(--accent); }

/* ─── MODAL ─── */
.modal-overlay {
  position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
  background: rgba(0,0,0,0.5); z-index: 9999;
  display: flex; align-items: center; justify-content: center;
}
.modal-content {
  background: var(--card-bg); border-radius: var(--radius);
  width: 90%; max-width: 600px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
  display: flex; justify-content: space-between; align-items: center;
}
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-close {
  background: none; border: none; font-size: 22px;
  cursor: pointer; color: var(--text-muted-dark);
  padding: 4px 8px; border-radius: 6px;
}
.modal-close:hover { background: #f1f5f9; }
.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  display: flex; justify-content: flex-end; gap: 10px;
}

/* ─── LOADING SPINNER ─── */
.spinner {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid rgba(0,200,224,0.3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── ERROR MESSAGE ─── */
.error-box {
  background: rgba(239,68,68,0.06);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex; gap: 12px; align-items: flex-start;
  color: #991b1b; font-size: 13px; line-height: 1.6;
}

/* ─── UTILS ─── */
.mono { font-family: 'JetBrains Mono', monospace; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-12 { margin-bottom: 12px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.text-muted { color: var(--text-muted-dark); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* ─── TOOLTIP ─── */
.tooltip-wrapper { position: relative; display: inline-block; }
.tooltip-wrapper .tooltip-text {
  visibility: hidden; opacity: 0;
  background: #1e293b; color: #e2e8f0;
  font-size: 11px; line-height: 1.4;
  padding: 8px 12px; border-radius: 6px;
  position: absolute; bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%);
  min-width: 200px; max-width: 280px;
  text-align: left; z-index: 200;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: opacity 0.15s;
  font-weight: 400;
}
.tooltip-wrapper:hover .tooltip-text { visibility: visible; opacity: 1; }

/* ─── RESPONSIVE ─── */
@media (max-width: 1200px) {
  body {
    grid-template-columns: 200px 1fr 300px;
  }
}
@media (max-width: 900px) {
  body {
    grid-template-columns: 1fr;
    grid-template-rows: 56px 1fr;
  }
  .sidebar { display: none; }
  .chatbot { display: none; }
}