/* 二维码工具用模式切换组织两条工作流，识别预览和生成结果保持稳定正方形边界。 */
.qr-workspace {
    max-width: 1200px;
}

.qr-mode {
    display: inline-grid;
    grid-template-columns: repeat(2, minmax(150px, 1fr));
    margin: 0 0 28px;
    padding: 3px;
    background: var(--line);
    border: 0;
    border-radius: 6px;
}

.qr-mode label {
    position: relative;
    cursor: pointer;
}

.qr-mode input {
    position: absolute;
    opacity: 0;
}

.qr-mode span {
    display: grid;
    min-height: var(--tool-control-height);
    padding: var(--tool-control-padding) 12px;
    place-items: center;
    border-radius: 4px;
    color: var(--muted);
    font-weight: 750;
    text-align: center;
    font-size: 14px;
    line-height: 22px;
}

.qr-mode input:checked + span {
    color: var(--ink);
    background: var(--surface);
    box-shadow: 0 1px 3px rgba(34, 37, 34, 0.12);
}

.qr-mode input:focus-visible + span {
    outline: 3px solid var(--eye);
    outline-offset: 3px;
}

.qr-panel[hidden],
.qr-preview[hidden],
.qr-result[hidden] {
    display: none;
}

.qr-panel h2,
.qr-result h2 {
    margin: 0;
    font-size: 21px;
    letter-spacing: 0;
}

.qr-source-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    margin-top: 16px;
}

.qr-dropzone {
    position: relative;
    display: grid;
    min-height: 96px;
    padding: 18px 20px;
    align-content: center;
    justify-items: center;
    gap: 5px;
    color: var(--ink);
    background: var(--surface-soft);
    border: 1px dashed var(--forest);
    border-radius: 4px;
    cursor: pointer;
    text-align: center;
    transition: background-color 120ms ease, border-color 120ms ease;
}

.qr-dropzone:hover,
.qr-dropzone.is-dragover {
    background: #eaf4ef;
    border-color: #135e43;
}

.qr-dropzone.is-dragover {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.qr-dropzone:focus-within {
    outline: 3px solid var(--eye);
    outline-offset: 3px;
}

.qr-dropzone-title {
    color: var(--forest);
    font-weight: 750;
}

.qr-dropzone-hint {
    color: var(--muted);
    font-size: 12px;
}

.qr-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
}

.qr-secondary-actions {
    display: flex;
    align-items: stretch;
    gap: 8px;
}

.qr-boundary,
.qr-status {
    min-height: 22px;
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.qr-preview {
    display: grid;
    max-width: 880px;
    min-height: 240px;
    margin-top: 24px;
    padding: 18px;
    place-items: center;
    overflow: hidden;
    background: var(--surface-soft);
    border: 1px solid var(--line);
}

.qr-preview canvas {
    display: block;
    max-width: 100%;
    max-height: 520px;
    object-fit: contain;
}

.qr-result {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.qr-output,
.qr-input {
    width: 100%;
    margin-top: 12px;
    padding: 14px;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 4px;
    font: 14px/1.6 Consolas, "Courier New", monospace;
    resize: vertical;
}

.qr-output {
    min-height: 132px;
    background: var(--surface-soft);
}

.qr-input {
    height: 144px;
    min-height: 96px;
}

.qr-output:focus,
.qr-input:focus {
    border-color: var(--forest);
    outline: 3px solid var(--focus-ring);
}

.qr-generate-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 750;
}

.qr-generated-preview {
    width: min(100%, 420px);
    aspect-ratio: 1;
    min-height: 0;
}

.qr-generated-preview canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
}

.qr-panel .form-error {
    min-height: 22px;
}

.primary-command:disabled,
.secondary-command:disabled {
    cursor: wait;
    opacity: 0.65;
}

@media (max-width: 640px) {
    .qr-mode {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
    }

    .qr-source-actions {
        grid-template-columns: 1fr;
    }

    .qr-secondary-actions {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .qr-secondary-actions > * {
        width: 100%;
        white-space: nowrap;
    }

    .qr-preview {
        min-height: 190px;
        padding: 12px;
    }
}

@media (max-width: 360px) {
    .qr-secondary-actions {
        grid-template-columns: 1fr;
    }
}