.bie-editor {
    --bie-ink: #17202a;
    --bie-muted: #5c6672;
    --bie-line: #d8dee6;
    --bie-panel: #ffffff;
    --bie-bg: #f5f7fb;
    --bie-blue: #0b67d1;
    --bie-blue-dark: #084f9f;
    --bie-green: #13795b;
    --bie-focus: #f5b84b;
    color: var(--bie-ink);
    background: var(--bie-bg);
    border: 1px solid var(--bie-line);
    border-radius: 8px;
    padding: 18px;
    margin: 24px 0;
    font-family: inherit;
}

.bie-editor * {
    box-sizing: border-box;
}

.bie-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.bie-header h2 {
    margin: 0 0 6px;
    font-size: 28px;
    line-height: 1.15;
    letter-spacing: 0;
}

.bie-header p,
.bie-help,
.bie-canvas-wrap figcaption,
.bie-meta-row {
    color: var(--bie-muted);
}

.bie-header p {
    margin: 0;
    max-width: 720px;
}

.bie-badge {
    flex: 0 0 auto;
    border: 1px solid #b8d8ca;
    background: #eaf8f2;
    color: var(--bie-green);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    padding: 7px 10px;
}

.bie-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 16px;
    align-items: start;
}

.bie-panel {
    background: var(--bie-panel);
    border: 1px solid var(--bie-line);
    border-radius: 8px;
    padding: 14px;
}

.bie-dropzone {
    display: flex;
    min-height: 132px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    border: 2px dashed #9fb6d2;
    border-radius: 8px;
    background: #f8fbff;
    cursor: pointer;
    text-align: center;
    transition: border-color 160ms ease, background 160ms ease;
}

.bie-dropzone:hover,
.bie-dropzone.bie-is-dragging {
    border-color: var(--bie-blue);
    background: #eef6ff;
}

.bie-dropzone input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.bie-drop-icon {
    display: inline-flex;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bie-blue);
    color: #fff;
    font-size: 24px;
    line-height: 1;
}

.bie-canvas-wrap {
    margin: 14px 0 0;
}

.bie-canvas-wrap canvas {
    display: block;
    width: 100%;
    max-height: 560px;
    aspect-ratio: 3 / 2;
    border: 1px solid var(--bie-line);
    border-radius: 8px;
    background:
        linear-gradient(45deg, #eff2f5 25%, transparent 25%),
        linear-gradient(-45deg, #eff2f5 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #eff2f5 75%),
        linear-gradient(-45deg, transparent 75%, #eff2f5 75%);
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
    background-size: 16px 16px;
}

.bie-canvas-wrap figcaption {
    margin-top: 8px;
    font-size: 14px;
}

.bie-meta-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    font-size: 13px;
}

.bie-controls {
    display: grid;
    gap: 14px;
}

.bie-controls fieldset {
    border: 1px solid var(--bie-line);
    border-radius: 8px;
    padding: 12px;
    margin: 0;
}

.bie-controls legend {
    padding: 0 6px;
    font-weight: 800;
}

.bie-controls label {
    display: grid;
    gap: 6px;
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 700;
}

.bie-controls input,
.bie-controls select,
.bie-controls textarea {
    width: 100%;
    min-height: 40px;
    border: 1px solid #b9c2cf;
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--bie-ink);
    background: #fff;
    font: inherit;
}

.bie-controls textarea {
    resize: vertical;
}

.bie-controls input[type="range"] {
    min-height: auto;
    padding: 0;
}

.bie-controls input:focus,
.bie-controls select:focus,
.bie-controls textarea:focus,
.bie-button:focus {
    outline: 3px solid var(--bie-focus);
    outline-offset: 2px;
}

.bie-grid {
    display: grid;
    gap: 10px;
}

.bie-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.bie-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.bie-actions-small {
    margin-top: 4px;
}

.bie-button {
    border: 1px solid transparent;
    border-radius: 6px;
    min-height: 40px;
    padding: 8px 12px;
    cursor: pointer;
    font-weight: 800;
    line-height: 1.2;
}

.bie-button-primary {
    background: var(--bie-blue);
    color: #fff;
}

.bie-button-primary:hover {
    background: var(--bie-blue-dark);
}

.bie-button-secondary {
    background: #eef2f7;
    border-color: #cfd7e3;
    color: var(--bie-ink);
}

.bie-button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.bie-help {
    margin: 10px 0 0;
    font-size: 13px;
}

@media (max-width: 860px) {
    .bie-layout,
    .bie-grid-2 {
        grid-template-columns: 1fr;
    }

    .bie-header,
    .bie-meta-row {
        flex-direction: column;
    }

    .bie-header h2 {
        font-size: 24px;
    }
}