.reflection-lab-shell {
    display: grid;
    grid-template-columns: minmax(0, 1.22fr) minmax(300px, 0.78fr);
    gap: 14px;
    align-items: start;
}

.reflection-lab-shell.is-readonly {
    grid-template-columns: 1fr;
}

.reflection-lab-stage-card,
.reflection-lab-controls-card,
.reflection-lab-info-card,
.reflection-lab-alert {
    border-radius: 20px;
    border: 1px solid #dce7f4;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 12px 28px rgba(28, 64, 98, 0.08);
}

.reflection-lab-stage-card {
    padding: 12px;
}

.reflection-lab-stage-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.reflection-lab-stage-head h3 {
    margin: 0;
    color: #173a63;
    font-size: 1rem;
}

.reflection-lab-stage-head p {
    margin: 4px 0 0;
    color: #6d8197;
    font-size: 0.86rem;
    line-height: 1.6;
}

.reflection-lab-phenomenon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 8px 12px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(168, 85, 247, 0.12), rgba(79, 70, 229, 0.12));
    color: #5c2d91;
    font-size: 0.84rem;
    font-weight: 700;
    text-align: center;
}

.reflection-lab-stage {
    position: relative;
    min-height: 430px;
    overflow: hidden;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(243, 232, 255, 0.9) 0%, rgba(250, 245, 255, 0.95) 100%);
}

.reflection-lab-shell.is-compact .reflection-lab-stage {
    min-height: 340px;
}

.reflection-lab-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.reflection-lab-boundary,
.reflection-lab-normal,
.reflection-lab-point,
.reflection-lab-point-label,
.reflection-lab-medium-tag {
    position: absolute;
    pointer-events: none;
}

.reflection-lab-boundary {
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.48), rgba(0, 0, 0, 0.08));
}

.reflection-lab-normal {
    width: 1px;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.48), transparent);
}

.reflection-lab-point {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #dc2626;
    border: 2px solid #fff;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.32);
}

.reflection-lab-point-label {
    color: #dc2626;
    font-weight: 700;
    font-size: 1.3rem;
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.95);
}

.reflection-lab-medium-tag {
    left: 16px;
    max-width: calc(100% - 32px);
    padding: 8px 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(23, 58, 99, 0.12);
    box-shadow: 0 8px 24px rgba(19, 55, 88, 0.1);
    color: #173a63;
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1.45;
}

.reflection-lab-medium-tag.top {
    top: 14px;
}

.reflection-lab-medium-tag.bottom {
    bottom: 14px;
}

.reflection-lab-side {
    display: grid;
    gap: 12px;
    align-items: start;
}

.reflection-lab-controls-card {
    padding: 14px;
}

.reflection-lab-control-group + .reflection-lab-control-group {
    margin-top: 14px;
}

.reflection-lab-control-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
    color: #173a63;
    font-weight: 700;
}

.reflection-lab-control-head span {
    font-size: 0.88rem;
}

.reflection-lab-control-value {
    font-size: 1rem;
    color: #4c1d95;
}

.reflection-lab-range-wrap {
    position: relative;
    padding-bottom: 18px;
}

.reflection-lab-range-wrap::before,
.reflection-lab-range-wrap::after {
    position: absolute;
    bottom: 0;
    font-size: 0.74rem;
    color: #7b8da0;
}

.reflection-lab-range-wrap::before {
    left: 0;
    content: attr(data-min);
}

.reflection-lab-range-wrap::after {
    right: 0;
    content: attr(data-max);
}

.reflection-lab-range {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 999px;
    outline: none;
    background: linear-gradient(to right, #a855f7, #7c3aed);
}

.reflection-lab-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid #a855f7;
    background: #fff;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.28);
    cursor: pointer;
}

.reflection-lab-option-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.reflection-lab-option-btn {
    min-height: 42px;
    border: 1px solid #d9e4ef;
    border-radius: 14px;
    background: #fff;
    color: #173a63;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.reflection-lab-option-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(36, 78, 114, 0.1);
}

.reflection-lab-option-btn.active {
    border-color: #8b5cf6;
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    color: #fff;
    box-shadow: 0 10px 20px rgba(124, 58, 237, 0.22);
}

.reflection-lab-shell.is-readonly .reflection-lab-option-btn,
.reflection-lab-shell.is-readonly .reflection-lab-range {
    cursor: default;
}

.reflection-lab-info-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.reflection-lab-info-card {
    padding: 12px 14px;
}

.reflection-lab-info-label {
    color: #7b8da0;
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.reflection-lab-info-value {
    margin-top: 6px;
    color: #173a63;
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.45;
}

.reflection-lab-info-subvalue {
    margin-top: 4px;
    color: #6d8197;
    font-size: 0.82rem;
    line-height: 1.5;
}

.reflection-lab-alert {
    display: none;
    padding: 12px 14px;
    border-color: rgba(239, 68, 68, 0.18);
    background: linear-gradient(135deg, rgba(254, 226, 226, 0.96), rgba(254, 242, 242, 0.98));
    color: #991b1b;
    line-height: 1.7;
    font-size: 0.88rem;
    font-weight: 700;
}

/*
    iPad 横屏宽度仍然需要保持“画布 + 参数区”双栏，才能减少上下滚动。
    因此把实验组件的单列断点下调到 900px，避免 1024px 左右的平板过早塌成纵向布局。
*/
@media (max-width: 900px) {
    .reflection-lab-shell {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .reflection-lab-stage {
        min-height: 320px;
    }

    .reflection-lab-stage-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .reflection-lab-info-grid,
    .reflection-lab-option-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .reflection-lab-stage-card,
    .reflection-lab-controls-card,
    .reflection-lab-info-card,
    .reflection-lab-alert {
        border-radius: 16px;
    }

    .reflection-lab-stage {
        min-height: 280px;
        border-radius: 14px;
    }

    .reflection-lab-info-grid,
    .reflection-lab-option-grid {
        grid-template-columns: 1fr;
    }
}