:root {
    --primary-color: #3498db;
    --text-color: #333;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --button-hover: #e0e0e0;
}

[data-theme="dark"] {
    --primary-color: #2980b9;
    --text-color: #f5f5f5;
    --background-color: #222;
    --card-background: #333;
    --border-color: #444;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --button-hover: #444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

h1, h2 {
    margin-bottom: 15px;
    color: var(--text-color);
}

#theme-toggle {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--card-background);
    box-shadow: 0 2px 5px var(--shadow-color);
}

.light-icon, .dark-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
}

[data-theme="dark"] .light-icon,
[data-theme="light"] .dark-icon {
    opacity: 0;
}

[data-theme="light"] .light-icon,
[data-theme="dark"] .dark-icon {
    opacity: 1;
}

.color-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 8px var(--shadow-color);
}

#color-preview {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    margin-bottom: 20px;
    background-color: #ff0000;
}

.color-values {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.color-value {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-value label {
    width: 50px;
    font-weight: bold;
}

.color-value input {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-background);
    color: var(--text-color);
}

.copy-btn {
    padding: 8px 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.copy-btn:hover {
    background-color: #2980b9;
}

.save-btn {
    padding: 10px 15px;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-top: 15px;
    width: 100%;
    font-weight: bold;
}

.save-btn:hover {
    background-color: #219653;
}

.color-pickers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.picker-section {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 8px var(--shadow-color);
}

.color-wheel-container {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto;
}

.selector {
    position: absolute;
    width: 12px;
    height: 12px;
    border: 2px solid white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 0 1px black;
    pointer-events: none;
}

#wheel-selector {
    top: 50%;
    left: 50%;
}

.slider-container {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 10px;
}

.slider-container label {
    width: 20px;
    font-weight: bold;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background-color: var(--border-color);
    outline: none;
}

.slider-container input[type="number"] {
    width: 60px;
    padding: 5px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-background);
    color: var(--text-color);
}

#red-slider::-webkit-slider-thumb {
    background-color: red;
}

#green-slider::-webkit-slider-thumb {
    background-color: green;
}

#blue-slider::-webkit-slider-thumb {
    background-color: blue;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    cursor: pointer;
}

.hsb-container {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

#hsb-gradient {
    width: 100%;
    height: 150px;
    border-radius: 5px;
    position: relative;
    background: linear-gradient(to bottom, rgba(0,0,0,0), #000),
                linear-gradient(to right, #fff, red);
    margin-bottom: 15px;
}

#hsb-selector {
    top: 0;
    left: 100%;
}

.hue-slider-container {
    width: 100%;
    height: 20px;
    position: relative;
    background: linear-gradient(to right, 
        #ff0000, #ffff00, #00ff00, #00ffff, #0000ff, #ff00ff, #ff0000);
    border-radius: 5px;
}

#hue-slider {
    width: 100%;
    height: 20px;
    -webkit-appearance: none;
    background: transparent;
    outline: none;
}

#hue-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 24px;
    border-radius: 3px;
    background: white;
    border: 1px solid #ccc;
    cursor: pointer;
}

.color-history, .color-palettes {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 8px var(--shadow-color);
}

#history-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
    min-height: 40px;
}

.history-color {
    width: 40px;
    height: 40px;
    border-radius: 5px;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

#clear-history {
    padding: 8px 12px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#clear-history:hover {
    background-color: #c0392b;
}

.palette-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.palette-btn {
    padding: 8px 12px;
    background-color: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.palette-btn:hover {
    background-color: var(--button-hover);
}

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

#palette-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    min-height: 40px;
}

.palette-color {
    width: 40px;
    height: 40px;
    border-radius: 5px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    position: relative;
}

.palette-color:hover::after {
    content: attr(data-color);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--card-background);
    color: var(--text-color);
    padding: 5px;
    border-radius: 3px;
    font-size: 12px;
    white-space: nowrap;
    box-shadow: 0 2px 5px var(--shadow-color);
    z-index: 10;
}

@media (max-width: 768px) {
    .color-pickers {
        grid-template-columns: 1fr;
    }
    
    .color-values {
        flex-direction: column;
    }
    
    .color-value {
        width: 100%;
    }
}