.tool-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 24px;
}
@media (min-width: 1024px) {
    .tool-grid {
        grid-template-columns: 380px 1fr;
    }
}

/* 卡片 */
.card {
    background: var(--color-bg-container);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    padding: 24px;
    display: flex;
    flex-direction: column;
}
.card-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 16px;
}
.mt-6 { margin-top: 24px; }
.flex-col { flex-direction: column; }
.flex-grow { flex-grow: 1; }

/* 上传 */
.upload-box {
    border: 2px dashed var(--color-border-normal);
    border-radius: 8px;
    padding: 30px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 16px;
}
.upload-box:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}
.upload-box p {
    margin: 6px 0;
    color: var(--color-text-tertiary);
    font-size: 14px;
}
.upload-tip {
    display: none;
    margin-top: 12px;
    font-size: 14px;
    color: var(--color-primary);
}
.file-input { display: none; }

/* 参数 */
.param-item {
    margin-bottom: 20px;
}
.param-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
}
.param-item input,
.param-item select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border-normal);
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
    background: #fff;
}
.param-item input[type="color"] {
    padding: 2px;
    height: 40px;
}
.preset-tip {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: 6px;
    line-height: 1.4;
}
.param-custom-size {
    display: none;
}

/* 按钮 */
.btn-primary,
.btn-success {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-hover);
}
.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn-success {
    background: var(--color-success);
    color: #fff;
}
.btn-success:hover {
    opacity: 0.9;
}
.w-full { width: 100%; }

/* 预览 */
.preview-box {
    border: 1px solid var(--color-border-normal);
    border-radius: 8px;
    background: #fff;
    padding: 20px;
    min-height: 200px;
    max-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    overflow: auto;
}
.preview-box .preview-area{
    max-width: 520px;
    max-height: 400px;
}
.preview-box img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

/* 辅助 */
.hidden { display: none !important; }

/* 提示 */
.tip {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    padding: 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}
.tip p {
    margin: 0 0 6px;
    display: flex;
    align-items: center;
}
.tip i {
    margin-right: 8px;
    color: var(--color-primary);
}