.color-picker-wrapper .tool-card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    border-top: 4px solid var(--primary) !important;
}

.color-picker-wrapper h1 {
    font-size: 2.25rem;
    color: var(--primary-dark);
    text-align: center;
    margin-bottom: 0.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.color-tool-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    align-items: start;
}

/* Left Panel */
.preview-box {
    width: 100%;
    height: 200px;
    border-radius: var(--radius);
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1rem;
    transition: background-color 0.2s ease;
    border: 1px solid var(--gray-200);
}

.contrast-check {
    display: flex;
    gap: 1rem;
    background: rgba(128, 128, 128, 0.2);
    backdrop-filter: blur(5px);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.contrast-check span {
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.contrast-check span.active {
    opacity: 1;
    text-shadow: 0px 1px 3px rgba(0,0,0,0.2);
}

/* Hide actual color input, style label as button */
.input-color-wrapper {
    position: relative;
    margin-top: 1rem;
}

.input-color-wrapper input[type="color"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.controls-group .btn {
    padding: 0.75rem;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* History */
.history-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.history-swatch {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
}
.history-swatch:hover {
    transform: scale(1.1);
}

/* Right Panel */
.format-group {
    margin-bottom: 1rem;
}

.format-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 0.25rem;
    letter-spacing: 0.5px;
}

.copy-input-group {
    display: flex;
    align-items: center;
}

.copy-input-group input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-200);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-family: 'Inter', monospace;
    font-weight: 500;
    color: var(--text);
    background: var(--gray-100);
    outline: none;
}

.btn-copy {
    background: var(--white);
    border: 1px solid var(--gray-200);
    padding: 0.75rem 1.25rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition);
}
.btn-copy:hover {
    background: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
}

/* Palettes */
.palette-group {
    margin-bottom: 1rem;
}
.palette-swatches {
    display: flex;
    height: 40px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-top: 0.25rem;
    border: 1px solid var(--gray-200);
}
.palette-color {
    flex: 1;
    cursor: pointer;
    transition: flex 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0; /* JS handles fade in */
    animation: fadeIn 0.3s forwards;
}
.palette-color:hover {
    flex: 1.5;
}
.palette-color span {
    background: rgba(0,0,0,0.5);
    color: white;
    font-size: 0.7rem;
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}
.palette-color:hover span {
    opacity: 1;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Toast */
#copyMessageBox {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    transform: translateY(150%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 9999;
}
#copyMessageBox.show {
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .color-tool-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}