/* ===== pola Web Frontend Styles ===== */

/* --- CSS Custom Properties --- */
:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-secondary: #6c757d;
  --color-primary: #4361ee;
  --color-primary-hover: #3a56d4;
  --color-primary-light: #eef0ff;
  --color-success: #2ecc71;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-border: #dee2e6;
  --color-card-shadow: rgba(0, 0, 0, 0.08);
  --color-bg-secondary: #f5f5f5;
  --radius: 8px;
  --radius-lg: 12px;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 960px;
  --transition: 0.2s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1b1e;
    --color-surface: #25262b;
    --color-text: #e4e5e7;
    --color-text-secondary: #909296;
    --color-primary: #5c7cfa;
    --color-primary-hover: #748ffc;
    --color-primary-light: #363840;
    --color-border: #373a40;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
  }
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* --- Header --- */
.header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.header-version {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-left: 8px;
}

.header-status {
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.loading {
  background: var(--color-warning);
  animation: pulse 1.2s infinite;
}

.status-dot.ready {
  background: var(--color-success);
}

.status-dot.error {
  background: var(--color-danger);
}

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

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 48px;
  z-index: 99;
}

.tab-btn {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  max-width: var(--max-width);
}

.tab-btn:hover {
  color: var(--color-text);
  background: var(--color-primary-light);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* --- Main Content --- */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px;
}

.tab-content {
  display: none;
}

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

/* --- Loading Overlay --- */
.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
  z-index: 200;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.loading-progress {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

/* --- Card Layout --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

/* --- Drop Zone --- */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--color-text-secondary);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.drop-zone-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.drop-zone-text {
  font-size: 0.9rem;
}

.drop-zone-hint {
  font-size: 0.75rem;
  margin-top: 4px;
  opacity: 0.7;
}

/* --- Textarea Input --- */
.data-input {
  width: 100%;
  min-height: 80px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--color-bg);
  color: var(--color-text);
  resize: vertical;
}

.data-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* --- Parameter Controls --- */
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 12px 0;
}

.param-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.param-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.param-select,
.param-input {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  background: var(--color-bg);
  color: var(--color-text);
}

.param-select:focus,
.param-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
}

/* --- Buttons --- */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.btn-group + .btn-group {
  margin-top: 4px;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-border);
}

/* --- Result Grid --- */
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.result-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.result-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
}

.result-value.success {
  color: var(--color-success);
}

/* unused — kept for potential future use */

/* --- Plot Container --- */
.plot-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 16px;
}

.plot-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 12px;
  text-align: center;
}

.plot-box img {
  max-width: 100%;
  height: auto;
}

/* --- Component Table --- */
.comp-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 0.85rem;
}

.comp-table th,
.comp-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.comp-table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Benchmark List --- */
.benchmark-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  transition: var(--transition);
}

.benchmark-item:hover {
  border-color: var(--color-primary);
}

.benchmark-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.benchmark-desc {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.benchmark-expected {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* --- Error Display --- */
.error-alert {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #dc2626;
  padding: 12px 16px;
  font-size: 0.9rem;
  margin: 8px 0;
}

@media (prefers-color-scheme: dark) {
  .error-alert {
    background: #2d1b1b;
    border-color: #5c1a1a;
    color: #f87171;
  }
}

/* --- Bootstrap Distribution --- */
.distribution-preview {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  word-break: break-all;
  max-height: 100px;
  overflow-y: auto;
  padding: 8px;
  background: var(--color-bg);
  border-radius: var(--radius);
  margin-top: 8px;
}

/* --- Info Tab --- */
.info-section {
  margin-bottom: 20px;
}

.info-section h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.info-section ul {
  list-style: none;
  padding: 0;
}

.info-section li {
  padding: 4px 0;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.info-section code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* --- Hidden --- */
.hidden {
  display: none !important;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .header-title {
    font-size: 1rem;
  }

  .header-status {
    font-size: 0.7rem;
  }

  .tab-btn {
    font-size: 0.8rem;
    padding: 10px 8px;
  }

  .main {
    padding: 16px 12px;
  }

  .params-grid {
    grid-template-columns: 1fr 1fr;
  }

  .result-grid {
    grid-template-columns: 1fr 1fr;
  }

  .result-value {
    font-size: 1.1rem;
  }

  .btn {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .benchmark-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}