/**
 * @package     CyclingSmartAi.Module.GearCalculator
 * @subpackage  Stylesheet
 *
 * @copyright   Copyright (C) 2024 CyclingSmartAi. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */

.mod-gear-calc-container {
    --mod-gear-calc-primary: #2563eb;
    --mod-gear-calc-primary-hover: #1d4ed8;
    --mod-gear-calc-secondary: #64748b;
    --mod-gear-calc-secondary-hover: #475569;
    --mod-gear-calc-success: #22c55e;
    --mod-gear-calc-error: #ef4444;
    --mod-gear-calc-warning: #f59e0b;
    
    --mod-gear-calc-bg: #ffffff;
    --mod-gear-calc-bg-section: #f8fafc;
    --mod-gear-calc-border: #e2e8f0;
    --mod-gear-calc-text: #1e293b;
    --mod-gear-calc-text-muted: #64748b;
    
    --mod-gear-calc-speed-min: #3b82f6;
    --mod-gear-calc-speed-max: #ef4444;
    --mod-gear-calc-speed-low: #60a5fa;
    --mod-gear-calc-speed-high: #f87171;
    
    /* Power zone colors - WCAG AA compliant */
    --mod-gear-calc-zone-recovery: #22c55e;
    --mod-gear-calc-zone-recovery-text: #052e16;
    --mod-gear-calc-zone-endurance: #3b82f6;
    --mod-gear-calc-zone-endurance-text: #ffffff;
    --mod-gear-calc-zone-tempo: #f59e0b;
    --mod-gear-calc-zone-tempo-text: #451a03;
    --mod-gear-calc-zone-threshold: #f97316;
    --mod-gear-calc-zone-threshold-text: #431407;
    --mod-gear-calc-zone-vo2max: #ef4444;
    --mod-gear-calc-zone-vo2max-text: #ffffff;
    
    /* Power min/max colors */
    --mod-gear-calc-power-min: #22c55e;
    --mod-gear-calc-power-min-text: #052e16;
    --mod-gear-calc-power-max: #dc2626;
    --mod-gear-calc-power-max-text: #ffffff;
    
    --mod-gear-calc-radius: 0.5rem;
    --mod-gear-calc-radius-sm: 0.25rem;
    --mod-gear-calc-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --mod-gear-calc-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    
    --mod-gear-calc-spacing-xs: 0.25rem;
    --mod-gear-calc-spacing-sm: 0.5rem;
    --mod-gear-calc-spacing-md: 1rem;
    --mod-gear-calc-spacing-lg: 1.5rem;
    --mod-gear-calc-spacing-xl: 2rem;
}

/* ==========================================================================
   Container
   ========================================================================== */

.mod-gear-calc-container {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--mod-gear-calc-text);
    background-color: var(--mod-gear-calc-bg);
    border-radius: var(--mod-gear-calc-radius);
    box-shadow: var(--mod-gear-calc-shadow);
    padding: var(--mod-gear-calc-spacing-lg);
    box-sizing: border-box;
}

.mod-gear-calc-container *,
.mod-gear-calc-container *::before,
.mod-gear-calc-container *::after {
    box-sizing: border-box;
}

/* ==========================================================================
   Noscript Warning
   ========================================================================== */

.mod-gear-calc-noscript {
    background-color: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: var(--mod-gear-calc-radius-sm);
    color: #92400e;
    padding: var(--mod-gear-calc-spacing-md);
    margin-bottom: var(--mod-gear-calc-spacing-lg);
    text-align: center;
    font-weight: 500;
}

/* ==========================================================================
   Form Layout
   ========================================================================== */

.mod-gear-calc-form {
    display: flex;
    flex-direction: column;
    gap: var(--mod-gear-calc-spacing-lg);
}


/* ==========================================================================
   Sections
   ========================================================================== */

.mod-gear-calc-section {
    background-color: var(--mod-gear-calc-bg-section);
    border: 1px solid var(--mod-gear-calc-border);
    border-radius: var(--mod-gear-calc-radius);
    padding: var(--mod-gear-calc-spacing-lg);
    margin: 0;
}

.mod-gear-calc-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--mod-gear-calc-text);
    margin: 0 0 var(--mod-gear-calc-spacing-md) 0;
    padding: 0 0 var(--mod-gear-calc-spacing-sm) 0;
    border-bottom: 2px solid var(--mod-gear-calc-primary);
}

/* ==========================================================================
   Form Fields
   ========================================================================== */

.mod-gear-calc-field {
    display: flex;
    flex-direction: column;
    gap: var(--mod-gear-calc-spacing-xs);
    margin-bottom: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-field:last-child {
    margin-bottom: 0;
}

.mod-gear-calc-field-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--mod-gear-calc-text);
}

.mod-gear-calc-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--mod-gear-calc-spacing-sm);
}

.mod-gear-calc-input,
.mod-gear-calc-select {
    flex: 1;
    padding: var(--mod-gear-calc-spacing-sm) var(--mod-gear-calc-spacing-md);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--mod-gear-calc-text);
    background-color: var(--mod-gear-calc-bg);
    border: 1px solid var(--mod-gear-calc-border);
    border-radius: var(--mod-gear-calc-radius-sm);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.mod-gear-calc-input:focus,
.mod-gear-calc-select:focus {
    outline: none;
    border-color: var(--mod-gear-calc-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.mod-gear-calc-input::placeholder {
    color: var(--mod-gear-calc-text-muted);
}

.mod-gear-calc-unit {
    font-size: 0.875rem;
    color: var(--mod-gear-calc-text-muted);
    white-space: nowrap;
    min-width: 2.5rem;
}

/* ==========================================================================
   Validation States
   ========================================================================== */

.mod-gear-calc-input.mod-gear-calc-invalid,
.mod-gear-calc-select.mod-gear-calc-invalid {
    border-color: var(--mod-gear-calc-error);
    background-color: #fef2f2;
}

.mod-gear-calc-input.mod-gear-calc-invalid:focus,
.mod-gear-calc-select.mod-gear-calc-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.mod-gear-calc-error {
    font-size: 0.75rem;
    color: var(--mod-gear-calc-error);
    min-height: 1rem;
    display: block;
}

.mod-gear-calc-error:empty {
    display: none;
}

/* ==========================================================================
   Sprocket Grid
   ========================================================================== */

.mod-gear-calc-sprocket-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--mod-gear-calc-spacing-sm);
}

.mod-gear-calc-sprocket-field {
    margin-bottom: 0;
}

.mod-gear-calc-sprocket-field .mod-gear-calc-label {
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mod-gear-calc-sprocket-field .mod-gear-calc-input {
    padding: var(--mod-gear-calc-spacing-xs) var(--mod-gear-calc-spacing-sm);
    font-size: 0.875rem;
}

.mod-gear-calc-sprocket-field .mod-gear-calc-unit {
    font-size: 0.75rem;
    min-width: 1rem;
}


/* ==========================================================================
   Buttons
   ========================================================================== */

.mod-gear-calc-buttons {
    display: flex;
    gap: var(--mod-gear-calc-spacing-md);
    flex-wrap: wrap;
}

.mod-gear-calc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--mod-gear-calc-spacing-sm) var(--mod-gear-calc-spacing-lg);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--mod-gear-calc-radius-sm);
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.mod-gear-calc-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.mod-gear-calc-btn-calculate {
    background-color: var(--mod-gear-calc-primary);
    border-color: var(--mod-gear-calc-primary);
    color: #ffffff;
}

.mod-gear-calc-btn-calculate:hover:not(:disabled) {
    background-color: var(--mod-gear-calc-primary-hover);
    border-color: var(--mod-gear-calc-primary-hover);
}

.mod-gear-calc-btn-calculate:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.mod-gear-calc-btn-reset {
    background-color: var(--mod-gear-calc-bg);
    border-color: var(--mod-gear-calc-border);
    color: var(--mod-gear-calc-secondary);
}

.mod-gear-calc-btn-reset:hover:not(:disabled) {
    background-color: var(--mod-gear-calc-bg-section);
    border-color: var(--mod-gear-calc-secondary);
    color: var(--mod-gear-calc-secondary-hover);
}

.mod-gear-calc-btn-reset:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(100, 116, 139, 0.2);
}

/* ==========================================================================
   Checkbox
   ========================================================================== */

.mod-gear-calc-checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: var(--mod-gear-calc-spacing-sm);
    font-size: 0.875rem;
    color: var(--mod-gear-calc-text);
    cursor: pointer;
}

.mod-gear-calc-checkbox {
    width: 1rem;
    height: 1rem;
    accent-color: var(--mod-gear-calc-primary);
    cursor: pointer;
}

/* ==========================================================================
   Results Section
   ========================================================================== */

.mod-gear-calc-results {
    margin-top: var(--mod-gear-calc-spacing-lg);
}

.mod-gear-calc-results-options {
    margin-bottom: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-results-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 calc(-1 * var(--mod-gear-calc-spacing-lg));
    padding: 0 var(--mod-gear-calc-spacing-lg);
}

.mod-gear-calc-results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    min-width: 400px;
}

.mod-gear-calc-results-table th,
.mod-gear-calc-results-table td {
    padding: var(--mod-gear-calc-spacing-sm);
    text-align: center;
    border: 1px solid var(--mod-gear-calc-border);
}

.mod-gear-calc-results-table th {
    background-color: var(--mod-gear-calc-bg);
    font-weight: 600;
    color: var(--mod-gear-calc-text);
    white-space: nowrap;
}

.mod-gear-calc-th-corner {
    background-color: var(--mod-gear-calc-bg-section) !important;
}

.mod-gear-calc-results-table tbody th {
    background-color: var(--mod-gear-calc-bg);
    text-align: right;
    padding-right: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-results-table td {
    background-color: var(--mod-gear-calc-bg);
    vertical-align: middle;
    position: relative;
    cursor: default;
}


/* ==========================================================================
   Speed Color Gradient Classes
   ========================================================================== */

/* Base speed cell styling */
.mod-gear-calc-speed-cell {
    transition: background-color 0.2s ease;
}

/* Minimum speed (blue) */
.mod-gear-calc-speed-min {
    background-color: var(--mod-gear-calc-speed-min) !important;
    color: #ffffff;
    font-weight: 600;
}

/* Maximum speed (red) */
.mod-gear-calc-speed-max {
    background-color: var(--mod-gear-calc-speed-max) !important;
    color: #ffffff;
    font-weight: 600;
}

/* Low speed range (blue tones) */
.mod-gear-calc-speed-low {
    background-color: var(--mod-gear-calc-speed-low) !important;
    color: #1e3a5f !important;
}

/* High speed range (red tones) */
.mod-gear-calc-speed-high {
    background-color: var(--mod-gear-calc-speed-high) !important;
    color: #7f1d1d !important;
}

/* Gradient steps for smooth color transition (0-100%) */
.mod-gear-calc-speed-0 { background-color: #3b82f6 !important; color: #ffffff !important; }
.mod-gear-calc-speed-10 { background-color: #4f8df7 !important; color: #ffffff !important; }
.mod-gear-calc-speed-20 { background-color: #6398f8 !important; color: #ffffff !important; }
.mod-gear-calc-speed-30 { background-color: #77a3f9 !important; color: #1e293b !important; }
.mod-gear-calc-speed-40 { background-color: #8baefa !important; color: #1e293b !important; }
.mod-gear-calc-speed-50 { background-color: #a78bfa !important; color: #1e293b !important; }
.mod-gear-calc-speed-60 { background-color: #c084fc !important; color: #1e293b !important; }
.mod-gear-calc-speed-70 { background-color: #e879f9 !important; color: #1e293b !important; }
.mod-gear-calc-speed-80 { background-color: #f472b6 !important; color: #1e293b !important; }
.mod-gear-calc-speed-90 { background-color: #fb7185 !important; color: #ffffff !important; }
.mod-gear-calc-speed-100 { background-color: #ef4444 !important; color: #ffffff !important; }

/* Cell content layout */
.mod-gear-calc-cell-speed {
    font-weight: 600;
    font-size: 0.9375rem;
    display: block;
}

.mod-gear-calc-cell-ratio {
    font-size: 0.75rem;
    color: inherit;
    opacity: 0.8;
    display: block;
}

.mod-gear-calc-cell-development {
    font-size: 0.6875rem;
    color: inherit;
    opacity: 0.7;
    display: block;
    margin-top: 2px;
}

/* ==========================================================================
   Results Legend
   ========================================================================== */

.mod-gear-calc-results-legend {
    display: flex;
    justify-content: center;
    gap: var(--mod-gear-calc-spacing-lg);
    margin-top: var(--mod-gear-calc-spacing-md);
    padding-top: var(--mod-gear-calc-spacing-md);
    border-top: 1px solid var(--mod-gear-calc-border);
}

.mod-gear-calc-legend-item {
    display: inline-flex;
    align-items: center;
    gap: var(--mod-gear-calc-spacing-sm);
    font-size: 0.875rem;
    color: var(--mod-gear-calc-text-muted);
}

.mod-gear-calc-legend-item::before {
    content: '';
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border-radius: var(--mod-gear-calc-radius-sm);
}

.mod-gear-calc-legend-min::before {
    background-color: var(--mod-gear-calc-speed-min);
}

.mod-gear-calc-legend-max::before {
    background-color: var(--mod-gear-calc-speed-max);
}

/* Power legend items */
.mod-gear-calc-legend-power-min::before {
    background-color: var(--mod-gear-calc-power-min);
}

.mod-gear-calc-legend-power-max::before {
    background-color: var(--mod-gear-calc-power-max);
}

/* ==========================================================================
   Climbing Parameters Section
   ========================================================================== */

.mod-gear-calc-climbing {
    background-color: var(--mod-gear-calc-bg-section);
}

.mod-gear-calc-climbing .mod-gear-calc-section-title {
    border-bottom-color: var(--mod-gear-calc-success);
}

/* ==========================================================================
   Quick-Select Gradient Buttons
   ========================================================================== */

.mod-gear-calc-quick-select {
    display: flex;
    flex-wrap: wrap;
    gap: var(--mod-gear-calc-spacing-sm);
    margin-bottom: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-btn-gradient-quick {
    padding: var(--mod-gear-calc-spacing-xs) var(--mod-gear-calc-spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    background-color: var(--mod-gear-calc-bg);
    border: 1px solid var(--mod-gear-calc-border);
    border-radius: var(--mod-gear-calc-radius-sm);
    color: var(--mod-gear-calc-text);
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    min-width: 3rem;
}

.mod-gear-calc-btn-gradient-quick:hover {
    background-color: var(--mod-gear-calc-bg-section);
    border-color: var(--mod-gear-calc-primary);
}

.mod-gear-calc-btn-gradient-quick:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.mod-gear-calc-btn-gradient-quick.active,
.mod-gear-calc-btn-gradient-quick[aria-pressed="true"] {
    background-color: var(--mod-gear-calc-primary);
    border-color: var(--mod-gear-calc-primary);
    color: #ffffff;
}

/* ==========================================================================
   Display Mode Toggle
   ========================================================================== */

.mod-gear-calc-display-mode {
    margin-top: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-toggle-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    border: 1px solid var(--mod-gear-calc-border);
    border-radius: var(--mod-gear-calc-radius-sm);
    overflow: hidden;
    background-color: var(--mod-gear-calc-bg);
}

.mod-gear-calc-btn-toggle {
    flex: 1;
    padding: var(--mod-gear-calc-spacing-sm) var(--mod-gear-calc-spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    background-color: var(--mod-gear-calc-bg);
    border: none;
    border-right: 1px solid var(--mod-gear-calc-border);
    color: var(--mod-gear-calc-text);
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, color 0.15s ease-in-out;
    white-space: nowrap;
    min-width: fit-content;
}

.mod-gear-calc-btn-toggle:last-child {
    border-right: none;
}

.mod-gear-calc-btn-toggle:hover {
    background-color: var(--mod-gear-calc-bg-section);
}

.mod-gear-calc-btn-toggle:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--mod-gear-calc-primary);
    z-index: 1;
    position: relative;
}

.mod-gear-calc-btn-toggle.active,
.mod-gear-calc-btn-toggle[aria-pressed="true"] {
    background-color: var(--mod-gear-calc-primary);
    color: #ffffff;
}

.mod-gear-calc-btn-display-mode {
    /* Specific styles for display mode buttons if needed */
}

/* ==========================================================================
   Power Zone Legend
   ========================================================================== */

.mod-gear-calc-power-zone-legend {
    margin-top: var(--mod-gear-calc-spacing-lg);
    padding: var(--mod-gear-calc-spacing-md);
    background-color: var(--mod-gear-calc-bg);
    border: 1px solid var(--mod-gear-calc-border);
    border-radius: var(--mod-gear-calc-radius-sm);
}

.mod-gear-calc-legend-title {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--mod-gear-calc-text);
    margin-bottom: var(--mod-gear-calc-spacing-sm);
}

.mod-gear-calc-zone-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--mod-gear-calc-spacing-md);
}

.mod-gear-calc-zone-item {
    display: inline-flex;
    align-items: center;
    gap: var(--mod-gear-calc-spacing-xs);
    font-size: 0.8125rem;
    color: var(--mod-gear-calc-text);
}

.mod-gear-calc-zone-color {
    display: inline-block;
    width: 0.875rem;
    height: 0.875rem;
    border-radius: 2px;
    flex-shrink: 0;
}

.mod-gear-calc-zone-label {
    display: inline-flex;
    align-items: baseline;
    gap: var(--mod-gear-calc-spacing-xs);
}

.mod-gear-calc-zone-range {
    font-size: 0.75rem;
    color: var(--mod-gear-calc-text-muted);
}

/* ==========================================================================
   Power Zone Color Classes
   ========================================================================== */

/* Zone color indicators */
.mod-gear-calc-zone-recovery .mod-gear-calc-zone-color {
    background-color: var(--mod-gear-calc-zone-recovery);
}

.mod-gear-calc-zone-endurance .mod-gear-calc-zone-color {
    background-color: var(--mod-gear-calc-zone-endurance);
}

.mod-gear-calc-zone-tempo .mod-gear-calc-zone-color {
    background-color: var(--mod-gear-calc-zone-tempo);
}

.mod-gear-calc-zone-threshold .mod-gear-calc-zone-color {
    background-color: var(--mod-gear-calc-zone-threshold);
}

.mod-gear-calc-zone-vo2max .mod-gear-calc-zone-color {
    background-color: var(--mod-gear-calc-zone-vo2max);
}

/* Zone cell background colors for table cells */
.mod-gear-calc-cell-zone-recovery {
    background-color: var(--mod-gear-calc-zone-recovery) !important;
    color: var(--mod-gear-calc-zone-recovery-text) !important;
}

.mod-gear-calc-cell-zone-endurance {
    background-color: var(--mod-gear-calc-zone-endurance) !important;
    color: var(--mod-gear-calc-zone-endurance-text) !important;
}

.mod-gear-calc-cell-zone-tempo {
    background-color: var(--mod-gear-calc-zone-tempo) !important;
    color: var(--mod-gear-calc-zone-tempo-text) !important;
}

.mod-gear-calc-cell-zone-threshold {
    background-color: var(--mod-gear-calc-zone-threshold) !important;
    color: var(--mod-gear-calc-zone-threshold-text) !important;
}

.mod-gear-calc-cell-zone-vo2max {
    background-color: var(--mod-gear-calc-zone-vo2max) !important;
    color: var(--mod-gear-calc-zone-vo2max-text) !important;
}

/* ==========================================================================
   Power Color Gradient Classes (Green to Red)
   ========================================================================== */

/* Power gradient steps for smooth color transition (0-100%) */
.mod-gear-calc-power-0 { background-color: #22c55e !important; color: #052e16 !important; }
.mod-gear-calc-power-10 { background-color: #4ade80 !important; color: #052e16 !important; }
.mod-gear-calc-power-20 { background-color: #86efac !important; color: #052e16 !important; }
.mod-gear-calc-power-30 { background-color: #bbf7d0 !important; color: #1e293b !important; }
.mod-gear-calc-power-40 { background-color: #fef08a !important; color: #1e293b !important; }
.mod-gear-calc-power-50 { background-color: #fde047 !important; color: #1e293b !important; }
.mod-gear-calc-power-60 { background-color: #fbbf24 !important; color: #1e293b !important; }
.mod-gear-calc-power-70 { background-color: #fb923c !important; color: #1e293b !important; }
.mod-gear-calc-power-80 { background-color: #f97316 !important; color: #ffffff !important; }
.mod-gear-calc-power-90 { background-color: #f87171 !important; color: #ffffff !important; }
.mod-gear-calc-power-100 { background-color: #dc2626 !important; color: #ffffff !important; }

/* ==========================================================================
   Min/Max Power Highlighting
   ========================================================================== */

.mod-gear-calc-power-min {
    background-color: var(--mod-gear-calc-power-min) !important;
    color: var(--mod-gear-calc-power-min-text) !important;
    font-weight: 600;
}

.mod-gear-calc-power-max {
    background-color: var(--mod-gear-calc-power-max) !important;
    color: var(--mod-gear-calc-power-max-text) !important;
    font-weight: 600;
}

/* ==========================================================================
   Power Indicator Badge
   ========================================================================== */

.mod-gear-calc-power-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
    font-weight: 600;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-radius: 0.25rem;
    background-color: var(--mod-gear-calc-zone-vo2max);
    color: var(--mod-gear-calc-zone-vo2max-text);
    margin-left: var(--mod-gear-calc-spacing-xs);
    vertical-align: middle;
}

.mod-gear-calc-power-badge-high {
    background-color: var(--mod-gear-calc-zone-vo2max);
    color: var(--mod-gear-calc-zone-vo2max-text);
}

.mod-gear-calc-power-badge-threshold {
    background-color: var(--mod-gear-calc-zone-threshold);
    color: var(--mod-gear-calc-zone-threshold-text);
}

/* ==========================================================================
   Power Cell Content
   ========================================================================== */

.mod-gear-calc-cell-power {
    font-weight: 600;
    font-size: 0.9375rem;
    display: block;
}

.mod-gear-calc-cell-power-secondary {
    font-size: 0.75rem;
    opacity: 0.85;
    display: block;
    margin-top: 2px;
}

/* Combined display mode - show both speed and power */
.mod-gear-calc-cell-combined .mod-gear-calc-cell-speed {
    font-size: 0.8125rem;
}

.mod-gear-calc-cell-combined .mod-gear-calc-cell-power {
    font-size: 0.75rem;
    opacity: 0.9;
    margin-top: 2px;
}

/* ==========================================================================
   Tooltips
   ========================================================================== */

.mod-gear-calc-results-table td[title] {
    cursor: help;
}

/* Custom tooltip styling (if using CSS tooltips) */
.mod-gear-calc-tooltip {
    position: relative;
}

.mod-gear-calc-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--mod-gear-calc-spacing-xs) var(--mod-gear-calc-spacing-sm);
    background-color: var(--mod-gear-calc-text);
    color: var(--mod-gear-calc-bg);
    font-size: 0.75rem;
    white-space: nowrap;
    border-radius: var(--mod-gear-calc-radius-sm);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 10;
    pointer-events: none;
}

.mod-gear-calc-tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}


/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* Tablet and below (max-width: 768px) */
@media screen and (max-width: 768px) {
    .mod-gear-calc-container {
        padding: var(--mod-gear-calc-spacing-md);
    }
    
    .mod-gear-calc-section {
        padding: var(--mod-gear-calc-spacing-md);
    }
    
    .mod-gear-calc-field-group {
        grid-template-columns: 1fr;
    }
    
    .mod-gear-calc-sprocket-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .mod-gear-calc-buttons {
        flex-direction: column;
    }
    
    .mod-gear-calc-btn {
        width: 100%;
    }
    
    .mod-gear-calc-results-legend {
        flex-direction: column;
        align-items: center;
        gap: var(--mod-gear-calc-spacing-sm);
    }
    
    /* Power features - tablet */
    .mod-gear-calc-quick-select {
        justify-content: center;
    }
    
    .mod-gear-calc-toggle-group {
        flex-direction: column;
    }
    
    .mod-gear-calc-btn-toggle {
        border-right: none;
        border-bottom: 1px solid var(--mod-gear-calc-border);
    }
    
    .mod-gear-calc-btn-toggle:last-child {
        border-bottom: none;
    }
    
    .mod-gear-calc-zone-items {
        justify-content: center;
    }
    
    .mod-gear-calc-power-zone-legend {
        padding: var(--mod-gear-calc-spacing-sm);
    }
}

/* Mobile (max-width: 480px) */
@media screen and (max-width: 480px) {
    .mod-gear-calc-container {
        padding: var(--mod-gear-calc-spacing-sm);
        border-radius: 0;
    }
    
    .mod-gear-calc-section {
        padding: var(--mod-gear-calc-spacing-sm);
        border-radius: var(--mod-gear-calc-radius-sm);
    }
    
    .mod-gear-calc-section-title {
        font-size: 1rem;
    }
    
    .mod-gear-calc-sprocket-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mod-gear-calc-sprocket-field .mod-gear-calc-label {
        font-size: 0.6875rem;
    }
    
    .mod-gear-calc-results-table {
        font-size: 0.75rem;
    }
    
    .mod-gear-calc-results-table th,
    .mod-gear-calc-results-table td {
        padding: var(--mod-gear-calc-spacing-xs);
    }
    
    .mod-gear-calc-cell-speed {
        font-size: 0.8125rem;
    }
    
    .mod-gear-calc-cell-ratio {
        font-size: 0.625rem;
    }
    
    .mod-gear-calc-cell-development {
        font-size: 0.5625rem;
    }
    
    /* Power features - mobile */
    .mod-gear-calc-quick-select {
        gap: var(--mod-gear-calc-spacing-xs);
    }
    
    .mod-gear-calc-btn-gradient-quick {
        padding: var(--mod-gear-calc-spacing-xs) var(--mod-gear-calc-spacing-sm);
        font-size: 0.75rem;
        min-width: 2.5rem;
    }
    
    .mod-gear-calc-btn-toggle {
        padding: var(--mod-gear-calc-spacing-xs) var(--mod-gear-calc-spacing-sm);
        font-size: 0.75rem;
    }
    
    .mod-gear-calc-zone-items {
        flex-direction: column;
        gap: var(--mod-gear-calc-spacing-xs);
    }
    
    .mod-gear-calc-zone-item {
        font-size: 0.75rem;
    }
    
    .mod-gear-calc-zone-range {
        font-size: 0.6875rem;
    }
    
    .mod-gear-calc-cell-power {
        font-size: 0.8125rem;
    }
    
    .mod-gear-calc-cell-power-secondary {
        font-size: 0.625rem;
    }
    
    .mod-gear-calc-cell-combined .mod-gear-calc-cell-speed,
    .mod-gear-calc-cell-combined .mod-gear-calc-cell-power {
        font-size: 0.6875rem;
    }
    
    .mod-gear-calc-power-badge {
        font-size: 0.5rem;
        padding: 0.0625rem 0.25rem;
    }
}

/* Horizontal scroll indicator for results table */
@media screen and (max-width: 600px) {
    .mod-gear-calc-results-table-wrapper {
        position: relative;
    }
    
    .mod-gear-calc-results-table-wrapper::after {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 2rem;
        background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.9));
        pointer-events: none;
        opacity: 1;
        transition: opacity 0.3s ease;
    }
    
    .mod-gear-calc-results-table-wrapper.mod-gear-calc-scrolled-end::after {
        opacity: 0;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .mod-gear-calc-container {
        box-shadow: none;
        padding: 0;
    }
    
    .mod-gear-calc-section {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
    
    .mod-gear-calc-btn {
        display: none;
    }
    
    .mod-gear-calc-results-table-wrapper {
        overflow: visible;
    }
    
    .mod-gear-calc-results-table {
        min-width: auto;
    }
    
    .mod-gear-calc-speed-min,
    .mod-gear-calc-speed-max {
        border: 2px solid currentColor;
    }
    
    /* Power features - print */
    .mod-gear-calc-power-min,
    .mod-gear-calc-power-max {
        border: 2px solid currentColor;
    }
    
    .mod-gear-calc-quick-select,
    .mod-gear-calc-toggle-group {
        display: none;
    }
    
    .mod-gear-calc-power-zone-legend {
        border: 1px solid #ccc;
    }
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */

/* Focus visible for keyboard navigation */
.mod-gear-calc-input:focus-visible,
.mod-gear-calc-select:focus-visible,
.mod-gear-calc-btn:focus-visible,
.mod-gear-calc-checkbox:focus-visible,
.mod-gear-calc-btn-gradient-quick:focus-visible,
.mod-gear-calc-btn-toggle:focus-visible {
    outline: 2px solid var(--mod-gear-calc-primary);
    outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .mod-gear-calc-input,
    .mod-gear-calc-select,
    .mod-gear-calc-btn,
    .mod-gear-calc-speed-cell,
    .mod-gear-calc-tooltip::after,
    .mod-gear-calc-btn-gradient-quick,
    .mod-gear-calc-btn-toggle {
        transition: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .mod-gear-calc-container {
        --mod-gear-calc-border: #000000;
    }
    
    .mod-gear-calc-input,
    .mod-gear-calc-select {
        border-width: 2px;
    }
    
    .mod-gear-calc-results-table th,
    .mod-gear-calc-results-table td {
        border-width: 2px;
    }
    
    /* Power zone colors - high contrast */
    .mod-gear-calc-zone-color {
        border: 1px solid #000000;
    }
    
    .mod-gear-calc-btn-toggle {
        border-width: 2px;
    }
    
    .mod-gear-calc-btn-gradient-quick {
        border-width: 2px;
    }
    
    .mod-gear-calc-power-badge {
        border: 1px solid #000000;
    }
}