/* ============================================
   A/B Test Management Dashboard — Style Sheet
   Dark professional theme for Televika
   ============================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d28;
  --bg-card: #21242f;
  --bg-input: #2a2d3a;
  --bg-hover: #2e3245;

  --border-color: #333748;
  --border-light: #444860;

  --text-primary: #e8eaf0;
  --text-secondary: #9ca3b4;
  --text-muted: #6b7280;

  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-dim: rgba(99, 102, 241, 0.15);

  --positive: #10b981;
  --positive-bg: rgba(16, 185, 129, 0.1);
  --negative: #ef4444;
  --negative-bg: rgba(239, 68, 68, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);

  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

/* --- Layout --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

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

.header-logo {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
}

.header-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.header-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.product-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-primary);
  border-radius: 10px;
  padding: 4px;
}

.product-tab {
  padding: 6px 16px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.product-tab:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.product-tab.active {
  background: var(--accent);
  color: #fff;
}

.product-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.btn-danger {
  background: transparent;
  color: var(--negative);
  border: 1px solid var(--negative);
}
.btn-danger:hover {
  background: var(--negative-bg);
}

/* --- Export Dropdown --- */
.export-dropdown {
  position: relative;
  display: inline-block;
}

.export-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  min-width: 100px;
  overflow: hidden;
}

.export-dropdown-menu.open {
  display: block;
}

.export-dropdown-item {
  display: block;
  width: 100%;
  padding: 8px 14px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
}

.export-dropdown-item:hover {
  background: var(--bg-hover);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 6px 8px;
  font-size: 1rem;
}

/* --- Dashboard Page --- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0 24px;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
}

.page-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* --- Search Bar --- */
.search-bar {
  margin-bottom: 16px;
}

.search-bar input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 12px 10px 36px;
  color: var(--text-primary);
  font-size: 0.93rem;
  font-family: inherit;
  transition: border-color var(--transition);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: 10px center;
  background-size: 16px;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

/* --- Test Row with ID --- */
.test-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.test-row .test-card {
  flex: 1;
  min-width: 0;
}

.test-row-id {
  width: 32px;
  height: 28px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* --- Test Cards List --- */
.test-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 40px;
}

.test-list-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.test-list-empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.4;
}

.test-list-empty p {
  font-size: 1rem;
  margin-bottom: 8px;
}

.test-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition);
}
.test-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow);
}

.test-card-info {
  flex: 1;
  min-width: 0;
}

.test-card-name {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.test-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.test-card-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.test-card-meta-label {
  color: var(--text-muted);
}

.test-card-metrics {
  display: flex;
  gap: 24px;
  margin: 0 24px;
  flex-shrink: 0;
}

.test-card-metric {
  text-align: center;
}

.test-card-metric-value {
  font-size: 1.1rem;
  font-weight: 700;
}

.test-card-metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.test-card-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* --- Metric Colors --- */
.metric-positive {
  color: var(--positive);
}
.metric-negative {
  color: var(--negative);
}
.metric-neutral {
  color: var(--text-secondary);
}

/* --- Test Form Page --- */
.test-page {
  padding: 32px 0 60px;
}

.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.form-section-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-section-title .section-icon {
  opacity: 0.6;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.form-row:last-child {
  margin-bottom: 0;
}

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

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-group label .label-unit {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0.2px;
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: var(--text-primary);
  font-size: 0.93rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group input[type="number"] {
  -moz-appearance: textfield;
}
.form-group input[type="number"]::-webkit-inner-spin-button,
.form-group input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group .input-with-btn {
  display: flex;
  gap: 8px;
}

.form-group .input-with-btn select {
  flex: 1;
}

.form-group .period-display {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.93rem;
}

/* --- Input Grid (Origin / Variant columns) --- */
.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.input-grid-header {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.input-grid-header.origin {
  color: var(--accent);
}

.input-grid-header.variant {
  color: var(--warning);
}

/* --- Output Block --- */
.output-section {
  margin-top: 8px;
}

.output-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.output-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
}

.output-panel-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.output-table {
  width: 100%;
  border-collapse: collapse;
}

.output-table tr {
  border-bottom: 1px solid var(--border-color);
}

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

.output-table td {
  padding: 8px 0;
  font-size: 0.9rem;
}

.output-table td:first-child {
  color: var(--text-secondary);
  padding-right: 16px;
}

.output-table td:last-child {
  text-align: right;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* --- Significance Block --- */
.significance-result {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 20px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.significance-result.significant {
  background: var(--positive-bg);
  border: 1px solid var(--positive);
}

.significance-result.not-significant {
  background: var(--negative-bg);
  border: 1px solid var(--negative);
}

.significance-badge {
  font-weight: 700;
  font-size: 0.9rem;
  padding: 4px 12px;
  border-radius: 20px;
}

.significant .significance-badge {
  background: var(--positive);
  color: #fff;
}

.not-significant .significance-badge {
  background: var(--negative);
  color: #fff;
}

.significance-details {
  display: flex;
  gap: 24px;
  font-size: 0.9rem;
}

.significance-detail-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* --- Image Upload --- */
.image-upload-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.image-upload-box {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.image-upload-box:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.image-upload-box.has-image {
  border-style: solid;
  padding: 8px;
}

.image-upload-box input[type="file"] {
  display: none;
}

.image-upload-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.image-upload-icon {
  font-size: 2rem;
  opacity: 0.4;
}

.image-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 4px;
  object-fit: contain;
}

.image-remove-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--negative);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* --- Rich Text Editor --- */
.editor-toolbar {
  display: flex;
  gap: 4px;
  padding: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
}

.editor-toolbar button {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition);
}

.editor-toolbar button:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.editor-content {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 16px;
  min-height: 150px;
  color: var(--text-primary);
  font-size: 0.93rem;
  line-height: 1.6;
  outline: none;
}

.editor-content,
.editor-content * {
  color: #ffffff;
}

.editor-content:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* --- Editor Expanded (Fullscreen) --- */
.editor-expanded {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--bg-primary);
  margin: 0;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  padding: 24px;
  overflow: hidden;
}

.editor-expanded .form-section-title {
  flex-shrink: 0;
}

.editor-expanded .editor-toolbar {
  flex-shrink: 0;
}

.editor-expanded .editor-content {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  border-radius: 0 0 var(--radius) var(--radius);
}

/* --- Warnings --- */
.warnings-container {
  margin-bottom: 16px;
}

.warning-item {
  background: var(--warning-bg);
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--warning);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* --- Form Actions Bar --- */
.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 24px 0;
  position: sticky;
  bottom: 0;
  background: linear-gradient(transparent, var(--bg-primary) 20%);
  padding-top: 40px;
}

/* --- Storage Indicator --- */
.storage-indicator {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.storage-bar {
  width: 60px;
  height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  overflow: hidden;
}

.storage-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}

/* --- Modal / Confirm Dialog --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-lg);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.modal-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* --- View Modal --- */
.view-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 720px;
  width: 94%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.view-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.view-modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.view-modal-close {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  line-height: 1;
}

.view-modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.view-modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.view-modal-section {
  margin-bottom: 24px;
}

.view-modal-section:last-child {
  margin-bottom: 0;
}

.view-modal-section-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  margin-bottom: 12px;
}

.view-modal-table {
  width: 100%;
  border-collapse: collapse;
}

.view-modal-table tr {
  border-bottom: 1px solid var(--border-color);
}

.view-modal-table tr:last-child {
  border-bottom: none;
}

.view-modal-table td {
  padding: 8px 0;
  font-size: 0.88rem;
}

.view-modal-table td:first-child {
  color: var(--text-secondary);
  padding-right: 16px;
}

.view-modal-table td:last-child {
  text-align: right;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.view-modal-table td.metric-positive {
  color: var(--positive);
}

.view-modal-table td.metric-negative {
  color: var(--negative);
}

.view-modal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.view-modal-grid-header {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.view-modal-grid-header.origin {
  color: var(--accent);
}

.view-modal-grid-header.variant {
  color: var(--warning);
}

.view-modal-significance {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 18px;
  border-radius: var(--radius);
}

.view-modal-significance.significant {
  background: var(--positive-bg);
  border: 1px solid var(--positive);
}

.view-modal-significance.not-significant {
  background: var(--negative-bg);
  border: 1px solid var(--negative);
}

.view-modal-images {
  display: flex;
  gap: 16px;
}

.view-modal-image-item {
  flex: 1;
  min-width: 0;
}

.view-modal-image-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}

.view-modal-img {
  max-width: 100%;
  max-height: 240px;
  object-fit: contain;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: border-color var(--transition);
}

.view-modal-img:hover {
  border-color: var(--accent);
}

.view-modal-analysis {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary);
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* --- Image Lightbox --- */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  cursor: pointer;
}

.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius);
}

/* --- Significance Upload (single) --- */
.significance-upload {
  margin-top: 16px;
}