/* loop-gain — lab chrome on mini-tutorials/_shared/lesson.css */

.lg-presets { display: flex; flex-wrap: wrap; gap: 6px; }
.lg-presets button {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 4px 10px;
    border: 1px solid var(--ai-gray-200);
    border-radius: 999px;
    background: #fff;
    color: var(--ai-gray-700);
    cursor: pointer;
}
.lg-presets button:hover { border-color: #eab308; background: #fef3c7; }

.lg-k-dock {
    position: sticky;
    top: 8px;
    z-index: 8;
    display: grid;
    grid-template-columns: minmax(200px, 0.95fr) minmax(200px, 1fr);
    gap: 8px 16px;
    align-items: center;
    margin: 0 0 8px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid #93c5fd;
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}
.lg-k-dock label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin: 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--ai-blue-800);
}
.lg-k-row { display: flex; align-items: center; gap: 8px; }
.lg-k-row input[type="number"] {
    width: 4.4rem;
    font-family: var(--ai-font-mono, ui-monospace, monospace);
    font-size: 0.85rem;
    padding: 3px 6px;
    border: 1px solid #93c5fd;
    border-radius: var(--ai-radius-sm);
}
.lg-k-row input[type="range"] { flex: 1; min-width: 0; accent-color: #2563eb; }

.lg-live {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 2.6em;
    font-size: 0.8rem;
    color: var(--ai-gray-700);
}
.lg-live .output {
    font-family: var(--ai-font-mono, ui-monospace, monospace);
    font-weight: 700;
    color: var(--ai-blue-800);
}

.lg-parts {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin: 0 0 8px;
    align-items: end;
}
.lg-parts label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--ai-gray-600);
}
.lg-parts input[type="number"] {
    width: 5.2rem;
    font-family: var(--ai-font-mono, ui-monospace, monospace);
    font-size: 0.8rem;
    padding: 3px 6px;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-sm);
}

.esr-callout {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    min-height: 2.7em;
    font-size: 0.8rem;
    color: var(--ai-gray-700);
    line-height: 1.35;
    margin: 0 0 8px;
    padding: 6px 10px;
    background: #f0f9ff;
    border-left: 3px solid var(--ai-blue-600);
    border-radius: 0 var(--ai-radius-sm) var(--ai-radius-sm) 0;
}

.lg-viz {
    display: grid;
    grid-template-columns: minmax(240px, 0.7fr) minmax(280px, 1.4fr);
    gap: 10px 14px;
    align-items: start;
}
.lg-diagram { margin: 0; text-align: center; }
.lg-diagram img {
    display: block;
    width: 100%;
    max-width: 300px;
    height: auto;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-md);
    padding: 8px 6px 4px;
}
.lg-diagram figcaption {
    font-size: 0.72rem;
    color: var(--ai-gray-600);
    margin-top: 6px;
}

.lg-chart-wrap {
    position: relative;
    height: 260px;
    width: 100%;
    background: #fafbfc;
    border: 1px solid var(--ai-gray-200);
    border-bottom: 0;
    border-radius: var(--ai-radius-md) var(--ai-radius-md) 0 0;
}

.scope-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    padding: 8px 10px;
    font-size: 0.75rem;
    color: #334155;
    background: #f1f5f9;
    border: 1px solid var(--ai-gray-200);
    border-top: 0;
    border-radius: 0 0 var(--ai-radius-md) var(--ai-radius-md);
}
.scope-legend .leg { display: inline-flex; align-items: center; gap: 5px; }
.scope-legend .swatch { width: 18px; height: 3px; border-radius: 1px; }
.leg-mag .swatch { background: #1a73e8; }
.leg-ph .swatch { background: #f97316; }
.leg-zdB .swatch-dash { background: transparent; border-top: 2px dashed #94a3b8; height: 0; }
.leg-fc .swatch-dash { background: transparent; border-top: 2px dashed rgba(167, 139, 250, 0.9); height: 0; }

.tf-deeper-wrap { max-width: 1320px; margin: 0 auto 40px; padding: 0 20px; }
.tf-deeper {
    background: var(--ai-bg-card, #fff);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-lg);
    padding: 12px 16px 16px;
}
.tf-deeper summary { cursor: pointer; font-weight: 700; color: var(--ai-blue-800); font-size: 0.95rem; }
.tf-deeper[open] summary { margin-bottom: 10px; }
.derivation-lead { margin: 0 0 12px; font-size: 0.88rem; color: var(--ai-gray-600); line-height: 1.5; }

@media (max-width: 960px) {
    .lg-viz, .lg-k-dock { grid-template-columns: 1fr; }
}