/* Modern Resistor Colour Code Calculator Styles - Clean Version */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables for consistent theming */
:root {
    --primary-color: #5b65ea;
    --secondary-color: #6c757d;
    --accent-color: #17a2b8;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    
    --border-color: #dee2e6;
    --border-radius: 8px;
    --border-radius-sm: 6px;
    --border-radius-lg: 12px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* Dark mode variables */
body.dark-mode {
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-muted: #868e96;
    
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    
    --border-color: #404040;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight on mobile */
    -webkit-touch-callout: none; /* Disable callout on long press */
}

html {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #ffffff;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: stretch;
    padding: 8px;
    color: var(--text-primary);
    overflow: hidden;
    margin: 0;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

body.dark-mode {
    background: #1a1a1a;
}

/* Main Container - Clean Card Design */
.main-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 12px;
    padding-top: 10px;
    max-width: 1400px;
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    transition: background var(--transition-normal);
}

/* Tab Design - Colorful Highlighted Style */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    justify-content: center;
    background: var(--bg-secondary);
    padding: 6px;
    border-radius: var(--border-radius);
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.tab-btn {
    flex: 1;
    max-width: 250px;
    padding: 12px 24px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.tab-btn.active {
    background: linear-gradient(135deg, #5b65ea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(91, 101, 234, 0.4);
    transform: scale(1.02);
    opacity: 1;
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
    opacity: 0.85;
    transform: translateY(-1px);
}

.tab-content {
    display: none;
}

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

/* Special flex layout for color-to-value tab */
#tab-color-to-value.tab-content.active {
    display: flex;
    flex-direction: column;
    overflow: visible;
}

/* Band Selector - Clean Button Design */
.band-selector-container {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    justify-content: flex-start;
    flex-wrap: wrap;
    background: var(--bg-secondary);
    padding: 10px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    max-width: 100%;
}

/* Band Selector for left column */
.band-selector-container-left {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-start;
    flex-wrap: wrap;
    background: var(--bg-secondary);
    padding: 6px 10px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.band-selector-container-left .band-selector-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

.band-selector-container-left .band-selector {
    display: flex;
    gap: 8px;
}

.band-selector-container-left .band-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.band-selector-container-left .band-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255,255,255,0.1), transparent);
    pointer-events: none;
}

.band-selector-container-left .band-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    background: var(--bg-secondary);
}

.band-selector-container-left .band-btn.active {
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(91, 101, 234, 0.3);
}

.band-selector-container-left .band-btn.active .band-label,
.band-selector-container-left .band-btn.active .band-value {
    color: white;
}

.band-selector-container-left .band-label {
    font-size: 8px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    font-weight: 600;
}

.band-selector-container-left .band-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-top: 2px;
}

.band-selector-container-left .reset-btn {
    padding: 6px 12px;
    font-size: 12px;
    height: auto;
}

.band-selector-container-left .dark-mode-btn {
    padding: 6px 12px;
    font-size: 12px;
    height: auto;
}

.band-selector-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.band-selector {
    display: flex;
    gap: 10px;
}

/* Band selector buttons for Value to Colour tab */
.band-btn-value {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 55px;
    height: 55px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    padding: 5px;
    position: relative;
    overflow: hidden;
}

.band-btn-value::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%, rgba(0,0,0,0.05) 100%);
    pointer-events: none;
}

.band-btn-value:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.band-btn-value.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(91, 101, 234, 0.4);
}

.band-btn-value .band-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.band-btn-value .band-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-top: 2px;
}

.band-btn-value.active .band-label,
.band-btn-value.active .band-value {
    color: white;
}

.band-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 65px;
    height: 65px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.band-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.band-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.band-btn.active .band-label,
.band-btn.active .band-value {
    color: white;
}

.band-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.band-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

/* Reset Button - Simple Style */
.reset-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.reset-btn:hover {
    background: #c82333;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Dark Mode Button */
.dark-mode-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-left: 8px;
}

.dark-mode-btn:hover {
    background: #5a6268;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

body.dark-mode .dark-mode-btn {
    background: #ffc107;
    color: #212529;
}

body.dark-mode .dark-mode-btn:hover {
    background: #e0a800;
}

/* Sound toggle button */
.sound-toggle-btn {
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.sound-toggle-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.sound-toggle-btn:hover svg {
    stroke: white;
}

.sound-toggle-btn.muted .sound-waves {
    display: none;
}

body.dark-mode .sound-toggle-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

body.dark-mode .sound-toggle-btn:hover {
    background: var(--bg-tertiary);
}

/* Print button */
.print-btn {
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.print-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.print-btn:hover svg {
    stroke: white;
}

body.dark-mode .print-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

body.dark-mode .print-btn:hover {
    background: var(--bg-tertiary);
}

/* Calculator Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 8px;
    align-items: start;
    overflow: visible;
}

.left-section {
    display: flex;
    flex-direction: column;
}

.right-section {
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Resistor Container - Light Background */
.resistor-container {
    background: var(--bg-secondary);
    padding: 20px 15px;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.resistor-container svg {
    width: 100%;
    height: auto;
    min-height: 180px;
    max-height: 250px;
}

/* Result Display Center - Prominent and Distinctive */
.result-display-center {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    border-radius: var(--border-radius-lg);
    border: 3px solid var(--primary-color);
    margin-top: 15px;
    margin-bottom: 15px;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4), 0 4px 10px rgba(0, 0, 0, 0.15);
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.result-display-center:has(.result-main) {
    transform: scale(1.02);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5), 0 6px 15px rgba(0, 0, 0, 0.2);
}

/* Placeholder text when no selection */
.result-placeholder {
    text-align: center;
    color: rgba(255, 255, 255, 0.9);
}

.placeholder-text {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 5px 0;
    letter-spacing: 0.5px;
}

.placeholder-subtext {
    font-size: 14px;
    font-weight: 400;
    margin: 0;
    opacity: 0.85;
}

/* Main result display */
.result-main {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    justify-content: center;
}

.result-value-large {
    font-size: 48px;
    font-weight: 800;
    color: white;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 2px;
    animation: popIn 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.5);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Copy button for result */
.copy-result-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    margin-top: 12px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius-sm);
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    animation: slideIn 0.4s ease-out 0.2s backwards;
}

.copy-result-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.copy-result-btn:active {
    transform: translateY(0);
}

/* Social Share Buttons */
.social-share-buttons {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    justify-content: center;
    align-items: center;
    animation: slideIn 0.4s ease-out 0.2s backwards;
}

.share-label {
    color: rgba(255, 255, 255, 0.95);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-right: 2px;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.social-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.social-share-btn:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.social-share-btn:active {
    transform: translateY(-1px) scale(1.05);
}

.twitter-btn {
    background: #000000;
    color: white;
}

.twitter-btn:hover {
    background: #1a1a1a;
}

.facebook-btn {
    background: #1877f2;
    color: white;
}

.facebook-btn:hover {
    background: #0d65d9;
}

.instagram-btn {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

.instagram-btn:hover {
    background: linear-gradient(45deg, #e08323 0%, #d6582c 25%, #cc1733 50%, #bc1356 75%, #ac0878 100%);
}

/* Tolerance display */
.tolerance-display {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    text-align: center;
}

.tolerance-label {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    margin-right: 8px;
}

.tolerance-value {
    color: white;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Unit Converter Section */
/* Simple explanation text styling */
.explanation-text {
    text-align: center;
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.explanation-subtext {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
}

#ohms-explanation {
    color: var(--text-primary);
    font-weight: 600;
}

.unit-converter {
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: var(--border-radius);
    margin-top: 10px;
    border: 1px solid var(--border-color);
}

.unit-converter-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.unit-buttons {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.unit-btn {
    padding: 6px 12px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-width: 60px;
}

.unit-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.unit-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.unit-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.unit-value-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.unit-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.unit-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    font-family: 'Monaco', 'Courier New', monospace;
}

/* Responsive Design Improvements */
@media (max-width: 768px) {
    body {
        padding: 0;
        height: 100vh;
        height: 100dvh; /* Dynamic viewport height for mobile */
    }
    
    .main-container {
        border-radius: 0;
        padding: 6px;
        max-width: 100%;
        height: 100vh;
        height: 100dvh;
        border: none;
        box-shadow: none;
    }
    
    .tabs {
        margin-bottom: 6px;
    }
    
    /* Make sure tab content doesn't have flex constraints on mobile */
    #tab-color-to-value.tab-content.active {
        flex: none;
        height: auto;
        overflow: visible;
    }
    
    .tab-btn {
        padding: 10px 16px;
        font-size: 14px;
        font-weight: 600;
    }
    
    .tab-btn.active {
        background: linear-gradient(135deg, #5b65ea 0%, #764ba2 100%);
        color: white;
        box-shadow: 0 4px 12px rgba(91, 101, 234, 0.4);
        transform: scale(1.02);
        opacity: 1;
    }
    
    .tab-btn:not(.active) {
        background: var(--bg-tertiary);
        color: var(--text-muted);
        opacity: 0.7;
    }
    
    /* Stack layout on mobile - NO SCROLLING */
    .calculator-layout {
        grid-template-columns: 1fr;
        gap: 8px;
        overflow: visible;
        height: auto;
        min-height: 0;
    }
    
    /* Ensure left and right sections don't restrict height */
    .left-section,
    .right-section {
        height: auto;
        min-height: 0;
        overflow: visible;
    }
    
    /* Compact resistor display on mobile */
    .resistor-container {
        padding: 8px 10px;
        padding-top: 8px;
    }
    
    .resistor-container svg {
        max-height: 140px;
        min-height: 120px;
        width: 100%;
    }
    
    /* Position band labels to avoid overlap with resistor on mobile */
    #band-label-group-1,
    #band-label-group-2,
    #band-label-group-3,
    #band-label-group-4,
    #band-label-group-5,
    #band-label-group-6 {
        transform: translate(0, -5px); /* Move slightly up to create space */
    }
    
    /* Smaller labels on mobile to prevent overlap */
    #band-label-group-1 circle,
    #band-label-group-2 circle,
    #band-label-group-3 circle,
    #band-label-group-4 circle,
    #band-label-group-5 circle {
        /* Circle styles - radius is set in HTML */
        fill: white;
        stroke: var(--primary-color);
        stroke-width: 1.5;
    }
    
    /* Hide circle for PPM label */
    #band-label-group-6 circle {
        display: none;
    }
    
    #band-label-1,
    #band-label-2,
    #band-label-3,
    #band-label-4,
    #band-label-5 {
        fill: var(--primary-color);
        font-size: 11px; /* Slightly smaller text */
        font-weight: 700;
    }
    
    #band-label-6 {
        fill: var(--primary-color);
        font-size: 16px; /* Larger PPM text for visibility */
        font-weight: 900;
        letter-spacing: 0.5px; /* Better spacing for PPM letters */
    }
    
    /* Band selector adjustments */
    .band-selector-container-left {
        padding: 8px;
        margin-bottom: 8px;
        gap: 6px;
    }
    
    /* Mobile: Make label take full width on its own line */
    .band-selector-container-left {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .band-selector-container-left .band-selector-label {
        font-size: 12px;
        text-align: center;
        width: 100%;
        display: block;
    }
    
    .band-selector-container-left .band-selector {
        gap: 8px;
        display: flex;
        justify-content: space-between;
        width: 100%;
    }
    
    .band-selector-container-left .band-btn {
        flex: 1;
        min-width: 50px;
        height: 50px;
        font-size: 16px;
        border-radius: 8px;
        border-width: 2px;
    }
    
    .band-selector-container-left .band-btn .band-value {
        font-size: 22px;
        font-weight: 700;
    }
    
    .band-selector-container-left .band-btn .band-label {
        font-size: 10px;
        margin-top: 2px;
    }
    
    /* Mobile: Larger reset and other buttons */
    .band-selector-container-left .reset-btn,
    .band-selector-container-left .dark-mode-btn,
    .band-selector-container-left .sound-toggle-btn {
        height: 50px;
        padding: 8px 12px;
        font-size: 13px;
        min-width: 60px;
    }
    
    .band-selector-container-left .reset-btn svg,
    .band-selector-container-left .dark-mode-btn svg,
    .band-selector-container-left .sound-toggle-btn svg {
        width: 16px;
        height: 16px;
    }
    
    /* Compact band controls - NO SCROLLING */
    #band-controls {
        gap: 5px;
        max-height: none;
        overflow-y: visible;
        overflow-x: hidden;
        padding-right: 0;
        padding-bottom: 0;
    }
    
    /* Remove right section overflow so everything is visible */
    .right-section {
        overflow: visible;
    }
    
    .band-control {
        padding: 6px 8px;
        padding-left: 28px;
        flex-shrink: 0;
    }
    
    /* Mobile: Taller color buttons for easier tapping */
    .color-btn {
        min-height: 50px;
        font-size: 11px;
        padding: 8px 4px;
        line-height: 1.2;
    }
    
    .color-grid {
        gap: 4px;
        grid-template-columns: repeat(4, 1fr);
        align-content: start;
    }
    
    .color-grid-expanded {
        display: grid;
        align-content: start;
    }
    
    .color-grid-expanded .color-btn {
        font-size: 11px;
        padding: 8px 4px;
        height: auto;
        min-height: 44px;
    }
    
    /* Smaller band indicators */
    .band-number-small {
        width: 20px;
        height: 20px;
        font-size: 11px;
    }
    
    .band-letter {
        font-size: 11px;
    }
    
    .band-indicator {
        gap: 2px;
    }
    
    /* Compact result display */
    .result-display-center {
        padding: 16px 12px;
        margin-top: 10px;
        margin-bottom: 10px;
        min-height: 80px;
    }
    
    .result-value-large {
        font-size: 32px;
        letter-spacing: 1.5px;
    }
    
    .copy-result-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    /* Compact social share buttons */
    .social-share-buttons {
        gap: 8px;
        margin-top: 10px;
    }
    
    .share-label {
        font-size: 13px;
        margin-right: 0;
    }
    
    .social-share-btn {
        width: 36px;
        height: 36px;
    }
    
    .social-share-btn svg {
        width: 14px;
        height: 14px;
    }
    
    /* Compact unit converter */
    .unit-converter {
        padding: 8px;
        margin-top: 8px;
    }
    
    .unit-converter-title {
        font-size: 11px;
        margin-bottom: 6px;
    }
    
    .unit-buttons {
        gap: 4px;
        margin-bottom: 8px;
    }
    
    .unit-btn {
        padding: 5px 8px;
        font-size: 12px;
        min-width: 45px;
    }
    
    .unit-values {
        grid-template-columns: 1fr 1fr;
        gap: 5px;
    }
    
    .unit-value-row {
        padding: 6px;
        font-size: 11px;
    }
    
    .unit-label {
        font-size: 10px;
    }
    
    .unit-value {
        font-size: 12px;
    }
    
    /* Hide less important elements on small screens */
    .sound-toggle-btn,
    .print-btn {
        display: none;
    }
}

/* Print styles - Enhanced to show color bands */
@media print {
    /* Hide unnecessary elements - minimalist print showing only resistor image and result */
    .dark-mode-btn,
    .sound-toggle-btn,
    .tabs,
    .tab-container,
    .band-selector-container-left,
    .band-controls-container,
    .unit-converter,
    .share-link-btn,
    .share-section,
    .reset-btn,
    .copy-result-btn,
    .copy-btn,
    .calculate-btn,
    .common-values-section,
    .band-selector-container,
    .tolerance-selection,
    .advanced-toggle-container,
    .advanced-section,
    .input-field,
    .input-group,
    .value-left-section,
    .left-section,
    .color-selector-container,
    .band-selector,
    .social-share-container,
    .v2c-action-container {
        display: none !important;
    }
    
    /* Optimize layout for print */
    body {
        background: white !important;
        color: black !important;
        padding: 0;
        margin: 0;
    }
    
    .main-container {
        box-shadow: none !important;
        border: none !important;
        max-width: 100% !important;
        padding: 20px !important;
        height: auto !important;
    }
    
    .main-title {
        color: black !important;
        font-size: 24pt !important;
        margin-bottom: 20px !important;
        text-align: center !important;
    }
    
    /* Show both tabs for printing */
    .tab-content {
        display: block !important;
        page-break-after: always;
    }
    
    /* Colour to Value tab */
    .calculator-layout {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .left-section,
    .right-section {
        width: 100% !important;
        page-break-inside: avoid;
    }
    
    .resistor-container {
        page-break-inside: avoid;
        margin: 20px auto;
        background: white !important;
        border: 2px solid #ddd !important;
        padding: 20px !important;
    }
    
    /* Ensure resistor SVG is visible with color bands */
    #resistor-svg,
    #value-resistor-svg {
        width: 100% !important;
        max-width: 600px !important;
        height: auto !important;
        display: block !important;
        margin: 20px auto !important;
        page-break-inside: avoid;
    }
    
    /* Make sure color bands are visible */
    #resistor-svg rect,
    #value-resistor-svg rect,
    #resistor-svg line,
    #value-resistor-svg line,
    #resistor-svg text,
    #value-resistor-svg text {
        print-color-adjust: exact !important;
        -webkit-print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    
    /* Visual resistor container */
    .visual-resistor-container {
        page-break-inside: avoid;
        margin: 20px auto !important;
        background: white !important;
        border: 2px solid #ddd !important;
        padding: 20px !important;
        max-width: 600px !important;
    }
    
    .result-display-center {
        background: white !important;
        border: 2px solid black !important;
        color: black !important;
        page-break-inside: avoid;
        margin: 20px 0;
    }
    
    .result-value-large {
        color: black !important;
        font-size: 36pt !important;
    }
    
    .tolerance-display {
        border-top: 1px solid black !important;
    }
    
    .tolerance-label,
    .tolerance-value {
        color: black !important;
    }
    
    /* Value to Colour layout - minimalist, only show right section */
    .value-layout {
        display: block !important;
    }
    
    .value-right-section {
        width: 100% !important;
        page-break-inside: avoid;
        margin: 0 auto !important;
    }
    
    /* Add title for print */
    .main-container::before {
        content: "Resistor Colour Code Calculator";
        display: block;
        font-size: 24pt;
        font-weight: bold;
        text-align: center;
        margin-bottom: 20px;
        color: black;
        page-break-after: avoid;
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .tabs {
        margin-top: 8px;
    }
    
    /* Ensure tab content doesn't have flex constraints */
    #tab-color-to-value.tab-content.active {
        flex: none;
        height: auto;
        overflow: visible;
    }
    
    /* Ensure sections don't restrict height */
    .calculator-layout {
        height: auto;
        min-height: 0;
    }
    
    .left-section,
    .right-section {
        height: auto;
        min-height: 0;
        overflow: visible;
    }
    
    /* Better band selector on small screens */
    .band-selector-container-left {
        padding: 10px;
        background: var(--bg-secondary);
        border: 1px solid var(--primary-color);
        box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
        border-radius: var(--border-radius);
    }
    
    /* 480px: Make layout vertical like 768px */
    .band-selector-container-left {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .band-selector-container-left .band-selector-label {
        display: block;
        width: 100%;
        text-align: center;
        margin-bottom: 0;
        color: var(--primary-color);
        font-weight: 700;
        letter-spacing: 1px;
        font-size: 11px;
    }
    
    .band-selector-container-left .band-selector {
        justify-content: space-between;
        width: 100%;
        gap: 6px;
    }
    
    .band-selector-container-left .band-btn {
        flex: 1;
        min-width: 45px;
        height: 48px;
        border-radius: 8px;
    }
    
    .band-selector-container-left .band-btn.active {
        transform: scale(1.05);
        box-shadow: 0 3px 10px rgba(91, 101, 234, 0.5);
    }
    
    .band-selector-container-left .band-label {
        font-size: 9px;
        letter-spacing: 0;
    }
    
    .band-selector-container-left .band-value {
        font-size: 20px;
        font-weight: 800;
    }
    
    /* Even more compact on small screens */
    .calculator-layout {
        gap: 8px;
    }
    
    .resistor-container {
        padding: 12px 8px;
    }
    
    .resistor-container svg {
        max-height: 160px;
        min-height: 140px;
        width: 100%;
    }
    
    /* Keep band labels above resistor on very small screens */
    #band-label-group-1,
    #band-label-group-2,
    #band-label-group-3,
    #band-label-group-4,
    #band-label-group-5,
    #band-label-group-6 {
        transform: translate(0, -8px); /* Move up more for tiny screens */
    }
    
    #band-label-group-1 circle,
    #band-label-group-2 circle,
    #band-label-group-3 circle,
    #band-label-group-4 circle,
    #band-label-group-5 circle {
        /* Circle radius must be set in HTML/SVG, not CSS */
        fill: white;
        stroke: var(--primary-color);
        stroke-width: 1.5;
    }
    
    /* PPM label without circle */
    #band-label-group-6 circle {
        display: none;
    }
    
    #band-label-1,
    #band-label-2,
    #band-label-3,
    #band-label-4,
    #band-label-5 {
        font-size: 10px; /* Extra small text on tiny screens */
    }
    
    #band-label-6 {
        font-size: 14px; /* Larger PPM text even on small screens */
        font-weight: 900;
    }
    
    /* Very compact band controls - NO SCROLLING */
    #band-controls {
        max-height: none;
        gap: 4px;
        padding-bottom: 0;
        overflow: visible;
    }
    
    .band-control {
        padding: 5px 6px;
        padding-left: 26px;
    }
    
    .color-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 3px;
    }
    
    .color-btn {
        min-height: 48px;
        font-size: 10px;
        padding: 7px 3px;
    }
    
    /* Empty band slots on mobile */
    .band-control.empty-band {
        padding: 8px;
        min-height: 40px;
    }
    
    .empty-slot-placeholder {
        min-height: 30px;
        font-size: 10px;
    }
    
    /* Tiny band indicators */
    .band-number-small {
        width: 16px;
        height: 16px;
        font-size: 9px;
    }
    
    .band-letter {
        font-size: 9px;
    }
    
    .band-letters-vertical .band-letter-single {
        font-size: 7px;
    }
    
    /* Mini result display */
    .result-display-center {
        padding: 10px 8px;
        min-height: 60px;
    }
    
    .result-value-large {
        font-size: 24px;
        letter-spacing: 0.5px;
    }
    
    .result-placeholder .placeholder-text {
        font-size: 12px;
    }
    
    .result-placeholder .placeholder-subtext {
        font-size: 10px;
    }
    
    /* Mini social share buttons */
    .social-share-buttons {
        gap: 6px;
        margin-top: 8px;
    }
    
    .share-label {
        font-size: 12px;
        margin-right: 0;
    }
    
    .social-share-btn {
        width: 32px;
        height: 32px;
    }
    
    .social-share-btn svg {
        width: 12px;
        height: 12px;
    }
    
    /* Stack unit buttons in 2 rows */
    .unit-buttons {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 3px;
    }
    
    .unit-btn {
        padding: 4px 6px;
        font-size: 11px;
        min-width: auto;
    }
    
    /* Single column unit values on very small screens */
    .unit-values {
        grid-template-columns: 1fr;
    }
    
    /* Hide dark mode button text, keep icon only */
    .dark-mode-text {
        display: none;
    }
    
    .dark-mode-btn {
        padding: 6px;
    }
    
    /* Value to Color tab adjustments */
    .value-layout {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .value-input-section {
        padding: 10px;
    }
    
    .input-group {
        margin-bottom: 12px;
    }
    
    .input-label {
        font-size: 12px;
    }
    
    .input-field {
        padding: 8px;
        font-size: 14px;
    }
    
    .common-value-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .tolerance-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .tolerance-btn {
        padding: 8px;
        font-size: 12px;
    }
}

/* Old Result Display - Hidden but kept for compatibility */
.result-display {
    background: var(--bg-primary);
    padding: 15px;
    border-radius: var(--border-radius-lg);
    border: 2px solid var(--border-color);
    margin-top: auto;
}

.result-value-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.result-value {
    font-size: 26px;
    font-weight: 600;
    color: var(--primary-color);
}

/* Copy Button - Simple Design */
.copy-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.copy-btn:hover svg {
    stroke: white;
}

.result-details {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 15px;
    line-height: 1.5;
}

/* Tolerance Range - Simple Badge */
.tolerance-range {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.range-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
}

.range-min, .range-max {
    font-weight: 600;
    color: var(--success-color);
    font-size: 14px;
}

.range-separator {
    color: var(--text-muted);
}

/* Share Link Button - Primary Style */
.share-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.share-link-btn:hover {
    background: #4c56d2;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Unit Selector - Toggle Style */
.unit-selector {
    display: inline-flex;
    gap: 0;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.unit-btn {
    padding: 8px 14px;
    background: var(--bg-primary);
    border: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-right: 1px solid var(--border-color);
}

.unit-btn:last-child {
    border-right: none;
}

.unit-btn.active {
    background: var(--primary-color);
    color: white;
}

.unit-btn:hover:not(.active) {
    background: var(--bg-secondary);
}

/* Result Conversions - Grid Cards */
.result-conversions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.conversion-item {
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    text-align: center;
    border: 1px solid var(--border-color);
}

.conversion-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.conversion-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Band Controls Container - No Independent Scrolling */
#band-controls {
    position: relative;
    transition: opacity 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow: visible;
}



/* Highlight animation for new band controls */
@keyframes highlightNew {
    0% {
        background-color: rgba(91, 101, 234, 0.1);
        transform: scale(1);
    }
    50% {
        background-color: rgba(91, 101, 234, 0.05);
        transform: scale(1.01);
    }
    100% {
        background-color: transparent;
        transform: scale(1);
    }
}

.band-control.new-band {
    animation: highlightNew 0.8s ease-out;
}

.right-section {
    min-height: 500px;
}

/* Band Controls - Expandable Cards */
.band-control {
    background: var(--bg-secondary);
    padding: 10px;
    padding-left: 32px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: relative;
    flex-shrink: 0;
}

/* Active band with controls */
.band-control.active-band {
    opacity: 1;
}

/* Empty band slot */
.band-control.empty-band {
    opacity: 0.2;
    background: var(--bg-tertiary);
    border-style: dashed;
    align-items: center;
    justify-content: center;
    padding-left: 8px;
}

.empty-slot-placeholder {
    width: 100%;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 12px;
    min-height: 60px;
}

/* Band indicator - minimal side label */
.band-indicator {
    position: absolute;
    left: 2px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.band-number-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 700;
    line-height: 1;
}

.band-letter {
    display: inline-block;
    font-size: 18px;
    font-weight: 900;
    color: var(--primary-color);
    text-transform: uppercase;
    line-height: 1;
    opacity: 1;
    letter-spacing: 0.5px;
}

.band-letters-vertical {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    margin-top: 2px;
}

.band-letter-single {
    font-size: 12px;
    font-weight: 900;
    color: var(--primary-color);
    text-transform: uppercase;
    line-height: 1;
    letter-spacing: 0;
}

/* Color Grid - Expandable Color Buttons */
.color-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
    max-width: 100%;
    align-content: start;
}

/* Expanded color grid for maximum space */
.color-grid-expanded {
    display: grid;
    align-content: start;
}

.color-grid-expanded .color-btn {
    min-height: 45px;
    height: auto;
    font-size: 14px;
    font-weight: 700;
    padding: 10px 4px;
}

/* For grids with 6 colors (PPM) */
.band-control:has(.color-btn:nth-child(6):last-child) .color-grid {
    grid-template-columns: repeat(3, 1fr);
}

/* For grids with 8 colors (tolerance) */
.band-control:has(.color-btn:nth-child(8):last-child) .color-grid {
    grid-template-columns: repeat(4, 1fr);
}

/* For grids with 10 colors (digits) */
.band-control:has(.color-btn:nth-child(10):last-child) .color-grid {
    grid-template-columns: repeat(5, 1fr);
}

/* For grids with 12 colors (multiplier) */
.band-control:has(.color-btn:nth-child(12):last-child) .color-grid {
    grid-template-columns: repeat(6, 1fr);
}

.color-btn {
    min-height: 42px;
    padding: 8px 3px;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    color: white;
    text-shadow: 0 1px 3px rgba(0,0,0,0.4);
    white-space: pre-line;
    line-height: 1.3;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.color-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%, rgba(0,0,0,0.2) 100%);
    pointer-events: none;
}

.color-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to bottom, rgba(255,255,255,0.15), transparent);
    pointer-events: none;
}

.color-btn.selected {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px rgba(91, 101, 234, 0.3);
    transform: scale(1.02);
}

.color-btn:hover:not(.selected) {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
    border-color: rgba(0, 0, 0, 0.2);
}

/* Value to Color Tab Styles - Compact spacing */
.input-group {
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-field {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    background: var(--bg-primary);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 101, 234, 0.1);
}

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

/* Common Values - Quick Select - Compact */
.common-values-section {
    margin-bottom: 12px;
}

.common-values-grid {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.common-value-btn {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.common-value-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Value Layout - More compact to fit above the fold */
.value-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    flex: 1;
    align-items: start;
}

/* Section Labels - Compact */
.section-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Tolerance Selection - Compact */
.tolerance-selection {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

/* Tolerance Grid - Compact */
.tolerance-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.tolerance-btn {
    padding: 10px 6px;
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    line-height: 1.3;
    min-height: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.tolerance-btn.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 101, 234, 0.2);
    transform: scale(1.05);
}

.tolerance-btn:hover:not(.selected) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Advanced Toggle */
.advanced-toggle-container {
    margin-top: 20px;
}

.advanced-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.advanced-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.advanced-section {
    margin-top: 20px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

/* Advanced Toggle Button */
.advanced-toggle-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.advanced-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.advanced-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.advanced-toggle[aria-expanded="true"] {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.advanced-toggle svg {
    transition: transform var(--transition-normal);
}

.advanced-toggle[aria-expanded="true"] svg {
    transform: rotate(180deg);
}

/* PPM Selection Styles */
.ppm-selection {
    margin-top: 10px;
}

.ppm-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 12px;
}

.ppm-btn {
    padding: 12px 8px;
    border: 2px solid transparent;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    line-height: 1.4;
    min-height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.ppm-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.ppm-btn.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 101, 234, 0.2);
    transform: scale(1.05);
}

/* Calculation Display */
.calculation-display {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-top: 20px;
    border: 1px solid var(--border-color);
}

.calc-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.calc-row:last-child {
    border-bottom: none;
}

.calc-label {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.calc-value {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

/* Visual Resistor Display - Now wider to prevent text overlap */
.visual-resistor-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 15px 12px;
    margin-top: 12px;
    margin-bottom: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.visual-resistor-container:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

#value-resistor-svg {
    max-width: 100%;
    width: 100%;
    height: auto;
    min-height: 400px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    display: block;
    margin: 0 auto;
}

#value-resistor-svg rect[id^="v2c-band"] {
    transition: fill 0.3s ease;
}

#value-resistor-svg text {
    transition: opacity 0.3s ease;
}

body.dark-mode .visual-resistor-container {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
}

body.dark-mode #value-resistor-svg text[fill="#666"] {
    fill: #adb5bd;
}

/* Share Section for Value to Colour */
.share-section {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Social Share Buttons for Value to Colour */
.v2c-social-share-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
}

/* Color Display - Removed (carousel removed per user request) */

/* Responsive Design */
@media (max-width: 1024px) {
    body {
        height: auto;
        min-height: 100vh;
        overflow: auto;
    }
    
    .main-container {
        height: auto;
        min-height: 100vh;
    }
    
    .calculator-layout {
        grid-template-columns: 1fr;
        gap: 20px;
        height: auto;
    }
    
    .left-section {
        position: relative;
        top: 0;
        height: auto;
    }
    
    .right-section {
        margin-top: 0;
        height: auto;
        min-height: 600px;
    }
    
    #band-controls {
        min-height: 600px;
    }
    
    .band-selector-container-left {
        justify-content: center;
    }
    
    .value-layout {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .visual-resistor-container {
        padding: 15px 10px;
        margin-top: 12px;
        margin-bottom: 12px;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }
    
    #value-resistor-svg {
        min-height: 300px;
        height: auto;
    }
    
    .share-section {
        gap: 12px;
    }
    
    .v2c-social-share-buttons {
        gap: 8px;
    }
    
    .v2c-social-share-buttons .social-share-btn {
        width: 36px;
        height: 36px;
    }
    
    .v2c-social-share-buttons .social-share-btn svg {
        width: 14px;
        height: 14px;
    }
}

@media (max-width: 768px) {
    body {
        height: auto;
        min-height: 100vh;
        overflow: auto;
    }
    
    .main-container {
        padding: 15px 15px;
        height: auto;
        min-height: 100vh;
    }
    
    #band-controls {
        min-height: 500px;
    }
    
    .tabs {
        flex-direction: row;
        gap: 4px;
        margin-top: 8px;
    }
    
    .tab-btn {
        flex: 1;
        padding: 12px 8px;
        font-size: 13px;
        font-weight: 600;
    }
    
    .tab-btn.active {
        background: linear-gradient(135deg, var(--primary-color) 0%, #764ba2 100%);
        color: white;
        box-shadow: 0 4px 12px rgba(91, 101, 234, 0.4);
        transform: scale(1.02);
    }
    
    .tab-btn:not(.active) {
        background: var(--bg-tertiary);
        color: var(--text-muted);
        opacity: 0.7;
    }
    
    .band-selector-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .band-selector-container-left {
        padding: 10px;
        gap: 10px;
    }
    
    .band-selector-container-left .band-btn {
        width: 45px;
        height: 45px;
    }
    
    .band-selector {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .result-value {
        font-size: 26px;
    }
    
    .common-values-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    
    .result-conversions {
        grid-template-columns: 1fr;
    }
    
    .color-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .band-control {
        padding-left: 25px;
    }
    
    .tolerance-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .tolerance-btn {
        min-height: 50px;
        font-size: 12px;
        padding: 8px 4px;
    }
    
    /* PPM Grid on Mobile */
    .ppm-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .ppm-btn {
        min-height: 50px;
        font-size: 12px;
        padding: 8px 4px;
    }
    
    /* Band selector buttons in Value to Colour on mobile */
    .band-btn-value {
        width: 60px;
        height: 60px;
    }
    
    .band-btn-value .band-value {
        font-size: 24px;
    }
    
    .band-btn-value .band-label {
        font-size: 10px;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 20px 15px;
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .tabs {
        gap: 3px;
        padding: 3px;
    }
    
    .tab-btn {
        padding: 10px 6px;
        font-size: 12px;
        border-radius: 6px;
    }
    
    .tab-btn.active {
        box-shadow: 0 3px 10px rgba(91, 101, 234, 0.5);
    }
    
    .band-btn {
        width: 55px;
        height: 55px;
    }
    
    .band-value {
        font-size: 20px;
    }
    
    .result-value {
        font-size: 22px;
    }
    
    .visual-resistor-container {
        padding: 15px 10px;
        margin-top: 15px;
    }
    
    #value-resistor-svg {
        height: 140px;
    }
    
    #value-resistor-svg text {
        font-size: 10px;
    }
    
    #value-resistor-svg text[id^="v2c-value"] {
        font-size: 11px;
    }
    
    .share-section {
        gap: 12px;
        margin-top: 15px;
    }
    
    .v2c-social-share-buttons {
        gap: 6px;
    }
    
    .v2c-social-share-buttons .share-label {
        font-size: 12px;
    }
    
    .v2c-social-share-buttons .social-share-btn {
        width: 32px;
        height: 32px;
    }
    
    .v2c-social-share-buttons .social-share-btn svg {
        width: 12px;
        height: 12px;
    }
    
    .color-display {
        gap: 8px;
    }
    
    .color-box-inner {
        width: 65px;
        height: 55px;
        font-size: 11px;
    }
    
    .color-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .color-btn {
        font-size: 9px;
        min-height: 32px;
    }
    
    /* Band selector buttons on very small screens */
    .band-btn-value {
        width: 55px;
        height: 55px;
    }
    
    .band-btn-value .band-value {
        font-size: 22px;
    }
    
    .band-btn-value .band-label {
        font-size: 9px;
        letter-spacing: 0;
    }
    
    /* PPM buttons on very small screens */
    .ppm-btn {
        min-height: 45px;
        font-size: 11px;
    }
}

/* Print Styles - Duplicate section removed, see main print styles above */