/* ==========================================================================
   Alphabet Shift Spectrum - Mobile Styles (Default)
   ========================================================================== */

/* Header */
.app-header {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 {
  margin-bottom: var(--spacing-xs);
}

.app-subtitle {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* Tab Navigation */
.tab-navigation {
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.tab-navigation::-webkit-scrollbar {
  height: 4px;
}

.tab-navigation::-webkit-scrollbar-track {
  background: var(--color-bg);
}

.tab-navigation::-webkit-scrollbar-thumb {
  background: var(--color-border-dark);
  border-radius: 2px;
}

.tab-button {
  flex-shrink: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  min-height: 44px;
  white-space: nowrap;
}

.tab-button:hover:not(:disabled) {
  background-color: var(--color-border);
}

.tab-button.active {
  background-color: var(--color-primary);
  color: white;
}

.tab-button:disabled {
  background-color: var(--color-bg);
  color: var(--color-border-dark);
}

/* Main Container */
.container {
  padding: var(--spacing-md);
  max-width: 100%;
}

/* Input Container (shared across tabs) */
.input-container {
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

/* Tab Panels */
.tab-panel {
  display: none;
}

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

/* Input Section */
.input-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  background-color: var(--color-surface);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  max-width: 800px;
  margin: 0 auto;
}

.input-section label {
  text-align: center;
  font-size: 1rem;
}

#cipher-input {
  width: 100%;
  min-height: 100px;
}

.input-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  align-items: center;
}

.input-info {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

#generate-btn {
  width: 100%;
  max-width: 200px;
}

/* Shift Results */
.shift-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.shift-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
}

.shift-card.rejected {
  opacity: 0.6;
  border-color: var(--color-danger);
}

.shift-card.candidate {
  border-color: var(--color-success);
  border-width: 2px;
}

.shift-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.shift-number {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-primary);
}

.shift-status {
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.shift-status.candidate {
  background-color: #dcfce7;
  color: var(--color-success);
}

.shift-status.rejected {
  background-color: #fee2e2;
  color: var(--color-danger);
}

.shift-text {
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.875rem;
  word-break: break-all;
  background-color: var(--color-bg);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
  max-height: 80px;
  overflow-y: auto;
}

.freq-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.freq-table {
  min-width: 650px;
  font-size: 0.75rem;
}

.freq-table th,
.freq-table td {
  padding: var(--spacing-xs);
  min-width: 24px;
}

/* Threshold Subsection (inside filter-section) */
.threshold-subsection {
  background-color: var(--color-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

.threshold-subsection h3 {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin: 0 0 var(--spacing-md);
  text-align: center;
}

.threshold-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.threshold-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
  min-width: 80px;
  text-align: center;
  background-color: var(--color-bg);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
}

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

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

.threshold-formula {
  font-family: "Courier New", Consolas, monospace;
  font-size: 0.875rem;
  text-align: center;
  color: var(--color-text-secondary);
  margin-top: var(--spacing-md);
  margin-bottom: 0;
}

/* Heatmap Section */
.heatmap-section {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
}

.heatmap-legend {
  margin-bottom: var(--spacing-md);
}

.heatmap-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.heatmap-grid {
  display: grid;
  grid-template-columns: auto repeat(26, minmax(1.25rem, 1fr));
  gap: 1px;
  min-width: 600px;
}

.heatmap-header {
  font-weight: 700;
  font-size: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  padding: var(--spacing-xs);
}

.heatmap-header.low-freq {
  background-color: var(--low-freq-bg);
}

.heatmap-row-label {
  font-weight: 600;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  padding: var(--spacing-xs);
  min-width: 2.5rem;
}

.heatmap-cell {
  font-size: 0.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 1.5rem;
  border-radius: 2px;
  cursor: crosshair;
  transition: outline 0.1s;
}

.heatmap-cell.low-freq-col {
  border: 1px solid var(--low-freq-border);
}

/* Filter Section */
.filter-section {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.filter-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.filter-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.filter-group {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

.filter-group.candidates {
  background-color: #f0fdf4;
  border: 1px solid #86efac;
}

.filter-group.rejected {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
}

.filter-group h3 {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.filter-group.candidates h3 {
  color: var(--color-success);
}

.filter-group.rejected h3 {
  color: var(--color-danger);
}

.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.filter-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
}

.filter-item.candidate {
  background-color: #dcfce7;
  color: #166534;
}

.filter-item.rejected {
  background-color: #fee2e2;
  color: #991b1b;
}

.filter-item .m-value {
  font-size: 0.75rem;
  opacity: 0.8;
}

/* Footer */
.app-footer {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-xl);
}

.app-footer p {
  margin: 0;
}