.tool-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
}
.tool-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.tool-icon-large {
    font-size: 3rem;
}
.tool-title h1 {
    margin-bottom: 0.5rem;
}
.tool-title p {
    color: var(--text-muted);
    margin: 0;
}
.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}
.export-controls {
    display: flex;
    gap: var(--spacing-sm);
}
.history-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}
.history-info {
    font-family: var(--font-primary);
    color: var(--text-secondary);
    min-width: 80px;
    text-align: center;
    font-size: 0.9rem;
}
.btn-icon {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}
.btn-icon:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.btn-icon:not(:disabled):hover {
    transform: translateY(-2px);
}
.palette-container {
    display: flex;
    height: 60vh;
    min-height: 400px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
}
.color-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    transition: flex 0.3s ease;
}
.color-column:hover {
    flex: 1.2;
}
.color-info {
    text-align: center;
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(5px);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}
.color-column:hover .color-info {
    opacity: 1;
    transform: translateY(0);
}
.hex-code {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
    cursor: pointer;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}
.color-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}
.action-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s ease;
}
.action-btn:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}
.lock-btn.locked {
    background: rgba(255, 255, 255, 0.9);
    color: #333;
}
.features-info {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}
.features-info h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}
.features-info ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}
.features-info li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
}
@media (max-width: 768px) {
    .palette-container {
        flex-direction: column;
        height: auto;
    }
    .color-column {
        height: 100px;
        flex-direction: row;
        justify-content: space-between;
        padding: 0 1.5rem;
    }
    .color-column:hover {
        flex: 1;
        height: 120px;
    }
    .color-info {
        opacity: 1;
        transform: translateY(0);
        background: none;
        padding: 0;
        display: flex;
        align-items: center;
        gap: 1rem;
        width: 100%;
        justify-content: space-between;
    }
    .hex-code {
        font-size: 1.2rem;
        margin-bottom: 0;
    }
    .history-navigation {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}