:root {
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --border-radius: 16px;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    outline: none;
    border: none;
}

*:focus {
    outline: none;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--card-bg);
    padding: 30px 0;
    margin: 0 20px 30px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo i {
    font-size: 28px;
    color: var(--accent-color);
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.tagline {
    color: var(--text-secondary);
    font-size: 16px;
    margin-top: 4px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

button {
    background: var(--accent-color);
    color: #fff;
    padding: 12px 24px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.2s;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    gap: 8px;
    border: none;
    outline: none;
}

button:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(79, 70, 229, 0.3);
}

button:active {
    transform: translateY(0);
}

button.secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

button.secondary:hover {
    background: #e2e8f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.control-group {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 30px;
}

.control-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-width: 200px;
}

.control-item label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.control-item select,
.control-item input[type="number"] {
    padding: 12px 16px;
    border-radius: 10px;
    background: white;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    box-shadow: 0 0 0 1px #e2e8f0;
    transition: box-shadow 0.2s;
}

.control-item select:focus,
.control-item input[type="number"]:focus {
    box-shadow: 0 0 0 2px var(--accent-color);
}

.custom-slider {
    position: relative;
    height: 40px;
    display: flex;
    align-items: center;
}

.custom-slider-track {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    position: relative;
    flex: 1;
}

.custom-slider-range {
    position: absolute;
    height: 100%;
    background: var(--accent-color);
    border-radius: 3px;
}

.custom-slider-thumb {
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.custom-slider-thumb:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.alpha-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-top: 4px;
}

.grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    margin-bottom: 40px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-shadow-hover);
}

.card:hover::after {
    content: "Double-click to copy";
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    z-index: 10;
    font-weight: 500;
}

.card.copied::after {
    content: "Copied!";
    background: rgba(34, 197, 94, 0.9);
}

.swatch {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.25);
    position: relative;
    transition: transform 0.3s;
    font-size: 16px;
}

.swatch:hover {
    transform: scale(1.02);
}

.swatch.dark-text {
    color: #111;
    text-shadow: none;
}

.lock-toggle {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid rgba(255, 255, 255, 1);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(8px);
    color: #333;
    font-size: 16px;
    transition: all 0.2s;
    z-index: 5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.lock-toggle:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2), 0 3px 6px rgba(0, 0, 0, 0.15);
}

.lock-toggle.locked {
    background: rgba(255, 255, 255, 0.98);
    color: #222;
}

.lock-toggle.locked:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2), 0 3px 6px rgba(0, 0, 0, 0.15);
}

.edit-toggle {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid rgba(255, 255, 255, 1);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(8px);
    color: #333;
    font-size: 14px;
    transition: all 0.2s;
    z-index: 5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.edit-toggle:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2), 0 3px 6px rgba(0, 0, 0, 0.15);
}

.color-value {
    padding: 20px;
    text-align: center;
    font-family: 'Inter', monospace;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

footer {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 32px 0;
    box-shadow: var(--card-shadow);
    margin: 40px 20px 30px 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-brand .logo i {
    font-size: 20px;
    color: var(--accent-color);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 24px;
    transition: all 0.2s;
    padding: 8px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-links a:hover {
    color: var(--accent-color);
    background: var(--bg-secondary);
    transform: translateY(-2px);
}

.footer-bottom {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-bottom i {
    color: #e53e3e;
    margin: 0 4px;
}

.feature-buttons {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

.feature-buttons button {
    padding: 12px 20px;
    font-size: 14px;
    border-radius: 10px;
    transition: all 0.2s;
}

.feature-buttons button:hover {
    transform: translateY(-2px);
}

.color-harmony {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.harmony-btn {
    padding: 8px 16px;
    font-size: 13px;
    background: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.2s;
}

.harmony-btn:hover {
    background: #e2e8f0;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.harmony-btn.active {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

@media (max-width: 1024px) {
    .grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px 0;
    }
    
    header {
        margin: 0 10px 20px 10px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .control-group {
        flex-direction: column;
        margin: 0 10px 20px 10px;
    }
    
    .feature-buttons {
        margin: 0 10px 20px 10px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    footer {
        margin: 20px 10px 20px 10px;
    }
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow-hover);
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid #e2e8f0;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
}

.close-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: none;
    box-shadow: none;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.storage-note {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 24px;
    color: #92400e;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.storage-note i {
    color: #f59e0b;
}

.no-palettes {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 40px 20px;
}

.saved-palette-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin-bottom: 12px;
    transition: all 0.2s;
}

.saved-palette-item:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1);
}

.palette-info {
    flex: 1;
}

.palette-info h4 {
    margin: 0 0 4px 0;
    color: var(--text-primary);
    font-size: 16px;
}

.palette-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

.colors-preview {
    display: flex;
    gap: 4px;
    align-items: center;
}

.color-preview {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.more-colors {
    font-size: 12px;
    color: var(--text-secondary);
    margin-left: 4px;
}

.palette-actions {
    display: flex;
    gap: 8px;
}

.load-btn, .delete-btn {
    padding: 8px 12px;
    font-size: 12px;
    border-radius: 6px;
    transition: all 0.2s;
}

.load-btn {
    background: var(--accent-color);
    color: white;
}

.load-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(79, 70, 229, 0.3);
}

.delete-btn {
    background: #ef4444;
    color: white;
}

.delete-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

/* Color Editor Modal */
.color-editor-content {
    max-width: 600px;
}

.color-editor {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.color-preview-section {
    display: flex;
    gap: 20px;
    align-items: center;
}

.large-color-preview {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    border: 2px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.color-info {
    flex: 1;
}

.color-format-display {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.color-format-display span {
    font-family: 'Inter', monospace;
    font-size: 16px;
    font-weight: 600;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    color: var(--text-primary);
}

.color-inputs {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

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

.input-group input {
    padding: 10px 12px;
    border-radius: 8px;
    background: white;
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    box-shadow: 0 0 0 1px #e2e8f0;
    transition: box-shadow 0.2s;
    width: 100%;
}

.input-group input:focus {
    box-shadow: 0 0 0 2px var(--accent-color);
}

.rgb-inputs, .hsl-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.color-editor-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 16px;
    border-top: 1px solid #e2e8f0;
}

.apply-btn {
    background: var(--accent-color);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.apply-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.cancel-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.cancel-btn:hover {
    background: #e2e8f0;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .grid {
        grid-template-columns: 1fr;
        margin: 0 10px 20px 10px;
    }
    
    .controls {
        flex-direction: column;
        width: 100%;
    }
    
    button {
        width: 100%;
        justify-content: center;
    }
    
    .feature-buttons {
        flex-direction: column;
    }
    
    .color-harmony {
        justify-content: center;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .saved-palette-item {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    
    .palette-actions {
        justify-content: center;
    }
    
    .color-preview-section {
        flex-direction: column;
        text-align: center;
    }
    
    .large-color-preview {
        width: 100px;
        height: 100px;
    }
    
    .color-editor-actions {
        flex-direction: column;
    }
    
    .apply-btn, .cancel-btn {
        width: 100%;
        justify-content: center;
    }
}/* Navigatio
n Styles */
.main-nav {
    display: flex;
    gap: 20px;
    align-items: center;
    margin: 0 20px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--accent-color);
    background: rgba(79, 70, 229, 0.1);
}

/* Page Content Styles */
.page-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 40px;
    margin: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--bg-secondary);
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.content-section {
    margin-bottom: 30px;
}

.content-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--bg-secondary);
}

.content-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 10px 0;
}

.content-section p {
    margin-bottom: 15px;
    line-height: 1.7;
    color: var(--text-primary);
}

.content-section ul {
    margin: 15px 0;
    padding-left: 20px;
}

.content-section li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.content-section a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.content-section a:hover {
    text-decoration: underline;
}

/* Features Grid for About Page */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
}

.feature-card i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    border: none;
    padding: 0;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Use Cases List */
.use-cases {
    list-style: none;
    padding: 0;
}

.use-cases li {
    background: var(--bg-secondary);
    padding: 15px 20px;
    margin-bottom: 10px;
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.use-cases li strong {
    color: var(--accent-color);
}

/* Footer Updates */
.footer-links {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-links a i {
    font-size: 1.2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .main-nav {
        justify-content: center;
        margin: 0;
    }
    
    .page-content {
        margin: 10px;
        padding: 20px;
    }
    
    .page-header h1 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .main-nav {
        flex-direction: column;
        gap: 10px;
    }
    
    .main-nav a {
        padding: 10px 20px;
        width: 100%;
        text-align: center;
    }
}