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

body {
    font-family: 'Arial', sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    background: #007bff;
    color: white;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

button:hover {
    background: #0056b3;
}

.palette-container {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 30px;
}

.color-card {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
}

.color-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.color-display {
    width: 100%;
    height: 70%;
    position: relative;
}

.color-info {
    background: white;
    padding: 15px;
    height: 30%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hex-code {
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.rgb-code {
    font-size: 12px;
    color: #666;
    margin-bottom: 10px;
}

.lock-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255,255,255,0.9);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.lock-btn:hover {
    background: rgba(255,255,255,1);
}

.lock-btn.locked {
    background: #ff4757;
    color: white;
}

.copy-btn {
    background: #28a745;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 11px;
    cursor: pointer;
}

.copy-btn:hover {
    background: #218838;
}

.copied {
    background: #17a2b8 !important;
}

@media (max-width: 768px) {
    .color-card {
        width: 100px;
        height: 100px;
    }
    
    .palette-container {
        gap: 15px;
    }
}