/* Feedback divider tool — VR-lesson chrome on a standalone tool page */

.fd-page {
    max-width: 1380px;
    margin: 0 auto 48px;
}

.fd-hero {
    text-align: center;
    padding: 20px 20px 8px;
    max-width: 880px;
    margin: 0 auto;
}

.fd-hero .mt-part-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ai-gray-600);
    margin: 0 0 8px;
}

.fd-hero h1 {
    margin: 0 0 10px;
    color: var(--ai-blue-800);
    font-size: 1.7rem;
}

.fd-hero a {
    color: var(--ai-blue-600);
    font-weight: 600;
}

.fd-split {
    display: grid;
    grid-template-columns: minmax(240px, 0.78fr) minmax(400px, 1.85fr);
    gap: 22px 32px;
    margin: 12px auto 24px;
    padding: 0 20px 0 24px;
    align-items: start;
}

.fd-read {
    position: sticky;
    top: 12px;
    max-height: calc(100vh - 24px);
    overflow-y: auto;
    padding: 2px 6px 20px 0;
}

.fd-read h2 {
    margin: 0 0 10px;
    font-size: 1.05rem;
    color: var(--ai-blue-800);
}

.mt-talk-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mt-talk-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--ai-gray-700);
}

.mt-talk-list .mt-talk-n {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.mt-talk-list a { color: var(--ai-blue-600); font-weight: 600; }

.mt-talk-list strong { color: var(--ai-gray-800); }

.fd-aside {
    margin-top: 16px;
    padding: 10px 12px;
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: 8px;
    font-size: 0.84rem;
    color: #78350f;
    line-height: 1.45;
}

.fd-aside a { color: #0f4c9e; font-weight: 600; }

.fd-lab {
    background: #fff;
    border: 1px solid var(--ai-gray-200);
    border-radius: 10px;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    padding: 12px 14px 14px;
}

.fd-presets {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin: 0 0 8px;
}

.fd-preset {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1px;
    width: 100%;
    min-width: 0;
    border: 1px solid var(--ai-gray-200);
    background: var(--ai-gray-50);
    color: var(--ai-gray-700);
    border-radius: 8px;
    padding: 5px 8px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    line-height: 1.2;
}

.fd-preset-title { color: inherit; }

.fd-preset-detail {
    font-size: 0.68rem;
    font-weight: 500;
    color: var(--ai-gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.fd-preset.is-on .fd-preset-detail { color: #3b82f6; }

.fd-preset.is-on {
    background: #eff6ff;
    border-color: #93c5fd;
    color: #1d4ed8;
}

.fd-controls {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.75fr) minmax(0, 1.08fr);
    gap: 6px;
    margin-bottom: 6px;
    align-items: start;
}

.fd-ctrl-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 8px;
    row-gap: 3px;
    width: auto;
    min-width: 0;
    overflow: visible;
    padding: 4px 8px 5px;
    background: var(--ai-gray-50);
    border: 1px solid var(--ai-gray-200);
    border-radius: 8px;
}

.fd-ctrl-setpoint {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fd-ctrl-setpoint > label {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1px;
}

.fd-ctrl-setpoint > label input,
.fd-ctrl-setpoint > label select {
    width: 100%;
    min-width: 3.8rem;
    max-width: 5.5rem;
}

.fd-ctrl-resistors > label {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1px;
}

.fd-ctrl-resistors > label input,
.fd-ctrl-resistors > label select {
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.fd-ctrl-search {
    grid-template-columns: 1.2fr 0.9fr;
}

.fd-ctrl-kicker {
    grid-column: 1 / -1;
    margin: 0;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--ai-gray-500);
}

.fd-controls label {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    min-width: 0;
    font-size: 0.7rem;
    font-weight: 600;
    line-height: 1.15;
    color: var(--ai-gray-600);
    white-space: nowrap;
}

.fd-controls label.is-idle {
    opacity: 0.45;
}

.fd-controls input[type="number"] {
    font: inherit;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--ai-gray-800);
    height: 1.5rem;
    line-height: 1.5rem;
    padding: 0 5px;
    border: 1px solid var(--ai-gray-200);
    border-radius: 4px;
    background: #fff;
    width: 4.4rem;
    max-width: 4.4rem;
    min-width: 0;
    box-sizing: border-box;
    -moz-appearance: textfield;
    appearance: textfield;
}

.fd-controls input[type="number"]::-webkit-inner-spin-button,
.fd-controls input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.fd-controls select {
    font: inherit;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--ai-gray-800);
    height: 1.5rem;
    line-height: 1.5rem;
    padding: 0 4px;
    border: 1px solid var(--ai-gray-200);
    border-radius: 4px;
    background: #fff;
    width: auto;
    max-width: 100%;
    min-width: 4.2rem;
    box-sizing: border-box;
}

.fd-controls label.fd-ctrl-wide select {
    flex: 1 1 auto;
    min-width: 0;
    max-width: none;
    width: auto;
}

.fd-controls select.fd-vref-mode {
    width: auto;
    max-width: none;
    flex: 0 0 auto;
    height: 1.5rem;
    padding: 0 4px;
    font-size: 0.68rem;
    font-weight: 600;
}

.fd-controls input:disabled {
    background: #f1f5f9;
    color: var(--ai-gray-500);
    cursor: not-allowed;
}

.fd-vref-box {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    min-width: 0;
}

.fd-vref-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--ai-gray-600);
    white-space: nowrap;
    flex: 0 0 auto;
}

.fd-vref-row {
    display: flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    flex: 1 1 auto;
}

.fd-vref-row > input[type="number"] {
    width: 4.2rem;
    max-width: 4.2rem;
    min-width: 4.2rem;
    flex: 0 0 auto;
}

.fd-vref-mode {
    width: auto;
    max-width: none;
    flex: 0 0 auto;
}

.fd-vref-range {
    display: flex;
    gap: 4px;
    min-width: 0;
}

.fd-vref-range input[type="number"] {
    width: 4.2rem;
    max-width: 4.2rem;
    min-width: 4.2rem;
    padding: 0 5px;
}

.fd-vref-range[hidden],
.fd-controls input[hidden] {
    display: none;
}

.fd-vref-eq {
    margin: 0;
    font-size: 0.62rem;
    font-weight: 500;
    color: var(--ai-gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    padding-left: 0;
}

.fd-controls label.accent-blue input { accent-color: #2563eb; }
.fd-controls label.accent-amber input { accent-color: #d97706; }
.fd-controls label.accent-emerald input { accent-color: #059669; }
.fd-controls label.accent-violet input { accent-color: #7c3aed; }

.fd-charts {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 176px;
    gap: 10px;
    margin: 4px 0 8px;
    align-items: stretch;
}

.fd-chart-card {
    border: 1px solid var(--ai-gray-200);
    border-radius: 8px;
    overflow: hidden;
    background: #fafbfc;
}

.fd-chart-card h3 {
    margin: 0;
    padding: 8px 10px 0;
    font-size: 0.78rem;
    color: var(--ai-gray-600);
}

.fd-chart-note {
    margin: 0;
    padding: 1px 10px 0;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--ai-gray-500);
}

.fd-chart-card canvas {
    display: block;
    width: 100%;
    height: auto;
}

/* Schematic + spec gauge are SVG so labels use the same renderer as the page
   (canvas fillText stays greyscale-soft on Windows). */
.fd-schematic,
.fd-window {
    display: block;
    width: 100%;
    min-height: 280px;
    line-height: 0;
    user-select: none;
}

.fd-schematic svg,
.fd-window svg {
    display: block;
    width: 100%;
    height: auto;
}

.fd-schematic text,
.fd-window text {
    font-family: var(--ai-font-sans);
    text-rendering: geometricPrecision;
}

.fd-schematic .fd-t-muted,
.fd-window .fd-t-muted {
    fill: #64748b;
    font-size: 12px;
    font-weight: 600;
}

.fd-schematic .fd-t-name {
    font-size: 13px;
    font-weight: 700;
}

.fd-schematic .fd-t-val {
    font-family: var(--ai-font-mono);
    font-size: 12px;
    font-weight: 600;
}

.fd-schematic .fd-t-chip {
    fill: #0f4c9e;
    font-size: 13px;
    font-weight: 700;
}

.fd-schematic .fd-t-chip-sub {
    fill: #64748b;
    font-size: 12px;
    font-weight: 500;
}

.fd-schematic .fd-t-vref {
    fill: #d97706;
    font-family: var(--ai-font-mono);
    font-size: 13px;
    font-weight: 700;
}

.fd-window .fd-t-status {
    fill: #334155;
    font-size: 12px;
    font-weight: 700;
}

.fd-window .fd-t-tick {
    font-family: var(--ai-font-mono);
    font-size: 12px;
    font-weight: 700;
}

.fd-window .fd-t-margin {
    font-size: 12px;
    font-weight: 700;
}

.fd-scatter {
    margin: 0 0 12px;
    border: 1px solid var(--ai-gray-200);
    border-radius: 8px;
    overflow: hidden;
}

.fd-scatter canvas {
    display: block;
    width: 100%;
    height: auto;
    cursor: crosshair;
}

.fd-readouts {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    margin: 0 0 12px;
}

.fd-readout {
    background: var(--ai-gray-50);
    border: 1px solid var(--ai-gray-200);
    border-radius: 8px;
    padding: 8px 10px;
}

.fd-readout-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ai-gray-500);
}

.fd-readout-value {
    font-family: var(--ai-font-mono);
    font-size: 0.95rem;
    color: var(--ai-blue-800);
}

.fd-readout-value.is-bad { color: #dc2626; }
.fd-readout-value.is-ok { color: #059669; }

.fd-eq {
    margin: 8px 0 12px;
    padding: 8px 10px;
    background: #f8fafc;
    border-radius: 8px;
    border: 1px solid var(--ai-gray-200);
}

.fd-eq-row {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    margin: 4px 0;
}

.im-eq-val {
    font-family: var(--ai-font-mono);
    font-weight: 700;
    color: #1d4ed8;
}

.fd-aha {
    margin: 0 0 12px;
    padding: 10px 12px;
    background: #eff6ff;
    border-left: 3px solid #2563eb;
    border-radius: 0 8px 8px 0;
    font-size: 0.88rem;
    color: var(--ai-gray-700);
    line-height: 1.45;
}

.fd-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--ai-gray-200);
    border-radius: 8px;
}

.fd-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.fd-table th {
    text-align: left;
    padding: 6px 8px;
    background: #f8fafc;
    color: var(--ai-gray-600);
    font-weight: 700;
}

.fd-table td {
    padding: 5px 8px;
    border-top: 1px solid var(--ai-gray-200);
    font-family: var(--ai-font-mono);
    cursor: pointer;
}

.fd-table tr.is-sel td {
    background: #eff6ff;
    color: #1d4ed8;
}

.fd-table tbody tr:hover td { background: #f8fafc; }

.fd-finder {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--ai-gray-200);
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    align-items: end;
    font-size: 0.85rem;
}

.fd-finder label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-weight: 600;
    color: var(--ai-gray-600);
    font-size: 0.78rem;
}

.fd-finder input {
    padding: 5px 8px;
    border: 1px solid var(--ai-gray-200);
    border-radius: 6px;
}

@media (max-width: 900px) {
    .fd-split { grid-template-columns: 1fr; }
    .fd-read { position: static; max-height: none; }
    .fd-charts { grid-template-columns: 1fr 140px; }
}

@media (max-width: 820px) {
    .fd-controls { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .fd-presets { grid-template-columns: 1fr; }
    .fd-ctrl-setpoint { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
    .fd-charts { grid-template-columns: 1fr; }
}