/* Hex to RGB Converter Tool - Professional Styling */

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="rgba(255,255,255,0.1)"><polygon points="1000,100 1000,0 0,100"/></svg>') no-repeat bottom;
    background-size: 100% 100px;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 0;
    opacity: 0.9;
}

/* Tool Main Content */
.tool-main {
    padding: 2rem 0;
    background: #f8fafc;
    min-height: calc(100vh - 200px);
}

.tool-panel {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 2rem;
}

.tool-header {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 2rem;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.tool-header h2 {
    color: #2d3748;
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tool-header p {
    color: #64748b;
    font-size: 1.1rem;
    margin-bottom: 0;
}

/* Mode Tabs */
.mode-tabs {
    display: flex;
    background: #f1f5f9;
    padding: 0.25rem;
    margin: 1.5rem;
    border-radius: 12px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
    overflow-x: auto;
}

.mode-tab {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: #64748b;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.mode-tab:hover {
    color: #475569;
    background: rgba(255,255,255,0.5);
}

.mode-tab.active {
    background: white;
    color: #667eea;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 2rem;
    animation: fadeIn 0.5s ease-in-out;
}

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

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

/* Color Input Section */
.color-input-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.color-input-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-weight: 600;
    color: #374151;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.color-input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.color-picker-input {
    width: 60px;
    height: 40px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.color-picker-input:hover {
    border-color: #667eea;
    transform: scale(1.05);
}

.text-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    background: white;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.text-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-help {
    font-size: 0.75rem;
    color: #6b7280;
    margin-top: 0.25rem;
}

/* Quick Actions */
.quick-actions {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e5e7eb;
}

.section-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: #374151;
    margin: 0;
}

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #374151;
    font-weight: 500;
}

.quick-action-btn:hover {
    border-color: #667eea;
    color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.quick-action-btn i {
    font-size: 1.5rem;
    color: #667eea;
}

/* Color Preview */
.color-preview-section {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    border: 2px solid #e5e7eb;
}

.color-preview {
    width: 200px;
    height: 200px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-weight: 600;
}

.color-preview.has-color {
    transform: scale(1.05);
}

/* Color Formats */
.color-formats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.format-card {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.format-card:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.format-label {
    font-weight: 700;
    color: #374151;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.format-value {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 0.75rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    color: #374151;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.format-value:hover {
    background: #f0f4ff;
    border-color: #667eea;
}

.copy-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s ease;
}

.format-value:hover .copy-btn {
    opacity: 1;
}

.copy-btn:hover {
    background: #5a6fd8;
}

/* Color Picker Advanced */
.color-picker-advanced {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.picker-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    align-items: start;
}

.color-wheel-container {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}

.color-wheel {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    cursor: crosshair;
    border: 4px solid white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.wheel-pointer {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid white;
    border-radius: 50%;
    background: #667eea;
    transform: translate(-50%, -50%);
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.picker-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-label {
    font-weight: 600;
    color: #374151;
    font-size: 0.875rem;
}

.color-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    background: #e5e7eb;
}

.color-slider::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}

.color-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.color-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* Palette Generator */
.palette-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.palette-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.palette-type-select {
    padding: 0.5rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    font-weight: 500;
    transition: all 0.3s ease;
}

.palette-type-select:focus {
    outline: none;
    border-color: #667eea;
}

.palette-colors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.palette-color {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.palette-color:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.palette-swatch {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.palette-hex {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: #374151;
}

/* Gradient Generator */
.gradient-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.gradient-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.gradient-color-input {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

.gradient-color-input label {
    font-size: 0.75rem;
    font-weight: 600;
    color: #374151;
}

.gradient-preview {
    width: 100%;
    height: 100px;
    border-radius: 12px;
    border: 3px solid white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin-bottom: 1rem;
}

.gradient-code {
    background: #374151;
    color: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    position: relative;
    overflow-x: auto;
}

/* Action Buttons */
.action-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 0.875rem;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
    transform: translateY(-2px);
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

.btn-info {
    background: #3b82f6;
    color: white;
}

.btn-info:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.btn-warning {
    background: #f59e0b;
    color: white;
}

.btn-warning:hover {
    background: #d97706;
    transform: translateY(-2px);
}

/* Statistics Section */
.stats-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.stat-icon {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #374151;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

/* History Section */
.history-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
}

.history-list {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.history-item {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

.history-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.history-color-swatch {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    border: 2px solid #e5e7eb;
    flex-shrink: 0;
}

.history-info {
    flex: 1;
}

.history-color-value {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-weight: 600;
    color: #374151;
    margin-bottom: 0.25rem;
}

.history-timestamp {
    font-size: 0.75rem;
    color: #6b7280;
}

.history-actions {
    display: flex;
    gap: 0.5rem;
}

.history-btn {
    padding: 0.5rem;
    border: none;
    border-radius: 6px;
    background: #f3f4f6;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.3s ease;
}

.history-btn:hover {
    background: #667eea;
    color: white;
}

/* Options Section */
.options-section {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: #374151;
}

.checkbox-container input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Color Analysis */
.color-analysis {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1rem;
    border: 2px solid #e5e7eb;
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.analysis-item {
    text-align: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
}

.analysis-label {
    font-size: 0.875rem;
    color: #6b7280;
    margin-bottom: 0.5rem;
}

.analysis-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #374151;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-section p {
        font-size: 1rem;
    }
    
    .tool-panel {
        margin: 1rem;
        border-radius: 12px;
    }
    
    .tool-header,
    .tab-content {
        padding: 1.5rem;
    }
    
    .mode-tabs {
        margin: 1rem;
        flex-direction: column;
    }
    
    .mode-tab {
        justify-content: flex-start;
    }
    
    .color-input-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .picker-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .palette-controls,
    .gradient-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
}

/* Utility Classes */
.d-none {
    display: none !important;
}

.d-block {
    display: block !important;
}

.text-center {
    text-align: center;
}

.mb-3 {
    margin-bottom: 1rem;
}

.mt-3 {
    margin-top: 1rem;
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Tooltips */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]:before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #374151;
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

[data-tooltip]:hover:before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

/* Focus States for Accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .hero-section {
        background: #000;
        color: #fff;
    }
    
    .tool-panel {
        border: 2px solid #000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}