/* transfer-function-primer/styles.css */

.tool-page {
    padding-top: var(--ai-space-4);
    padding-bottom: var(--ai-space-8);
}

.primer-intro {
    max-width: none;
    margin: 0 0 var(--ai-space-6);
}

.primer-intro .intro-lead {
    font-size: 1.02rem;
    line-height: 1.65;
    color: #1e293b;
    margin-bottom: var(--ai-space-4);
}

.primer-intro p strong {
    color: #1e293b;
}

.primer-intro mjx-container[display="true"] {
    display: block;
    margin: var(--ai-space-3) auto var(--ai-space-4);
    padding: 14px 20px;
    max-width: 100%;
    overflow-x: auto;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: var(--ai-radius-md);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.tf-block-diagram {
    margin: 0 auto var(--ai-space-5);
    max-width: 560px;
    text-align: center;
}

.tf-block-diagram svg {
    display: block;
    width: 100%;
    height: auto;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: var(--ai-radius-md);
    padding: 12px 8px 8px;
}

.tf-block-diagram figcaption {
    margin-top: 10px;
}

.tf-block-eq {
    margin: 0 0 6px;
    font-size: 1rem;
    color: var(--ai-gray-700);
}

.tf-block-note {
    margin: 0;
    font-size: 1.02rem;
    color: var(--ai-gray-600);
    line-height: 1.5;
}

.tf-block-note strong {
    color: #1e40af;
    font-weight: 700;
}

.primer-main {
    max-width: 1600px;
    margin: 0 auto var(--ai-space-6);
}

.dual-schematics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--ai-space-2);
    margin-bottom: var(--ai-space-3);
}

.schematic-half {
    margin: 0;
}

.schematic-half .schematic-wrap {
    margin-bottom: 0;
}

.schematic-title {
    margin: 0 0 4px;
    font-size: 0.88rem;
    color: var(--ai-blue-800);
    text-align: center;
}

.workspace-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--ai-space-4);
    align-items: start;
}

.workspace-left h3,
.plots-heading {
    margin: 0 0 var(--ai-space-3);
    font-size: 1.05rem;
    color: var(--ai-blue-800);
}

.plots-stack {
    display: flex;
    flex-direction: column;
    gap: var(--ai-space-2);
}

.workspace-right {
    position: sticky;
    top: 8px;
}

.plots-hint {
    margin-top: -2px;
    margin-bottom: 6px;
    font-size: 0.75rem;
}

.primer-hint {
    font-size: 0.9rem;
    color: var(--ai-gray-600);
    margin: 0 0 var(--ai-space-4);
    line-height: 1.5;
}

.schematic-wrap {
    margin: 0 0 var(--ai-space-3);
    text-align: center;
}

.schematic {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-md);
    padding: 8px 6px 4px;
}

.schematic-wrap figcaption {
    font-size: 0.68rem;
    color: var(--ai-gray-600);
    margin-top: 4px;
    line-height: 1.3;
}

.fixed-params {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
    padding: 10px 14px;
    margin-bottom: var(--ai-space-4);
    background: var(--ai-gray-100);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-md);
    font-size: 0.9rem;
    color: var(--ai-gray-800);
}

.fixed-params .fixed-note {
    color: var(--ai-gray-600);
    font-size: 0.8rem;
}

.controls-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--ai-space-4);
}

.esr-range-hint {
    margin: 0;
    font-size: 0.78rem;
    color: var(--ai-gray-600);
}

.input-row {
    display: grid;
    grid-template-columns: 130px 72px 1fr;
    gap: 8px;
    align-items: center;
}

.esr-only-row {
    grid-template-columns: 130px 64px 1fr;
}

.input-row label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ai-gray-700);
}

.input-row input[type="number"] {
    font-size: 0.85rem;
    padding: 6px 8px;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-sm);
    width: 100%;
}

.input-row input[type="range"] {
    width: 100%;
}

.highlight-row {
    padding: 8px 10px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--ai-radius-md);
}

.readout-block {
    display: grid;
    gap: 8px;
    margin-bottom: var(--ai-space-3);
}

.readout-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-sm);
    font-size: 0.9rem;
}

.readout-label {
    font-weight: 600;
    color: var(--ai-gray-700);
}

.pole-label::before {
    content: "● ";
    color: #dc2626;
}

.zero-label::before {
    content: "○ ";
    color: #16a34a;
}

.readout-row .output {
    font-family: var(--ai-font-mono);
    font-size: 0.85rem;
    color: var(--ai-blue-800);
}

.esr-callout {
    font-size: 0.88rem;
    color: var(--ai-gray-700);
    line-height: 1.5;
    margin: 0 0 var(--ai-space-3);
    padding: 10px 12px;
    background: #f0f9ff;
    border-left: 3px solid var(--ai-blue-600);
    border-radius: 0 var(--ai-radius-sm) var(--ai-radius-sm) 0;
}

.pole-zero-guide {
    margin: 0 0 var(--ai-space-4);
    padding: 14px 14px 12px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: var(--ai-radius-md);
    font-size: 0.84rem;
    color: var(--ai-gray-700);
    line-height: 1.55;
}

.pole-zero-guide h4 {
    margin: 0 0 8px;
    font-size: 0.92rem;
    color: #1e293b;
}

.pole-zero-guide p {
    margin: 0 0 10px;
}

.pole-zero-guide a {
    color: var(--ai-blue-600);
    font-weight: 600;
}

.guide-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin: 0 0 10px;
}

.guide-form {
    padding: 10px 10px 8px;
    border-radius: var(--ai-radius-sm);
    border: 1px solid var(--ai-gray-200);
    background: #fff;
}

.guide-form.high-entropy {
    border-color: #e2e8f0;
}

.guide-form.low-entropy {
    border-color: #86efac;
    background: #f0fdf4;
}

.guide-tag {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #64748b;
    margin-bottom: 4px;
}

.guide-form.low-entropy .guide-tag {
    color: #15803d;
}

.guide-form p {
    margin: 0 0 4px;
    font-size: 0.8rem;
}

.guide-eq {
    margin: 4px 0 0 !important;
    font-size: 0.82rem;
    overflow-x: auto;
}

.guide-list {
    margin: 0 0 10px 18px;
    padding: 0;
    font-size: 0.82rem;
}

.guide-list li {
    margin-bottom: 5px;
}

.guide-takeaway {
    margin: 0 !important;
    padding: 8px 10px;
    background: #eef2ff;
    border-radius: var(--ai-radius-sm);
    border-left: 3px solid #6366f1;
    font-size: 0.82rem;
    color: #334155;
}

.scope-panel {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-md);
    overflow: hidden;
    background: #fff;
}

.bode-panel {
    border: 1px solid var(--ai-gray-200);
    border-radius: var(--ai-radius-md);
    padding: 8px 10px 6px;
    background: #fff;
}

.bode-panel .plots-heading,
.scope-panel .plots-heading {
    padding: 8px 10px 0;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.scope-panel .plots-heading {
    padding-bottom: 4px;
}

.compare-scope-canvas {
    display: block;
    width: 100%;
    flex: 0 0 auto;
    min-height: 400px;
    height: 400px;
    background: #0a0a0a;
}

.scope-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
    padding: 8px 10px;
    font-size: 0.75rem;
    color: #334155;
    background: #f1f5f9;
    border-top: 1px solid #cbd5e1;
}

.scope-legend .leg {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.scope-legend .swatch {
    width: 18px;
    height: 3px;
    border-radius: 1px;
}

.leg-in .swatch { background: #4ade80; }
.leg-div .swatch { background: #f87171; }
.leg-rc .swatch { background: #d4b896; }

.scope-legend .leg-note {
    color: #64748b;
    font-size: 0.68rem;
}

.compare-controls {
    margin-bottom: var(--ai-space-3);
    padding: 10px 12px;
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: var(--ai-radius-md);
}

.compare-controls h3 {
    margin: 0 0 6px;
    font-size: 0.95rem;
    color: var(--ai-blue-800);
}

.compare-hint {
    margin: 0 0 8px;
    font-size: 0.78rem;
    color: var(--ai-gray-600);
    line-height: 1.4;
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 12px;
    margin-bottom: 12px;
}

.controls-grid .input-row {
    grid-template-columns: 1fr 88px;
}

.esr-prominent {
    grid-template-columns: 130px 56px 1fr;
    margin-bottom: 8px;
}

.scope-readouts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.scope-readouts .readout-row {
    padding: 6px 8px;
    font-size: 0.8rem;
}

.tf-derivation {
    margin-top: var(--ai-space-5);
    padding-top: var(--ai-space-4);
    border-top: 1px solid var(--ai-gray-200);
}

.tf-derivation h3 {
    margin: 0 0 var(--ai-space-2);
    font-size: 1.05rem;
    color: var(--ai-blue-800);
}

.derivation-lead {
    margin: 0 0 var(--ai-space-3);
    font-size: 0.88rem;
    color: var(--ai-gray-600);
    line-height: 1.5;
}

.derivation-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--ai-space-3);
    align-items: start;
}

.derivation-col {
    padding: 12px 14px;
    border-radius: var(--ai-radius-md);
    border: 1px solid var(--ai-gray-200);
    background: #fff;
}

.derivation-col h4 {
    margin: 0 0 10px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--ai-gray-700);
    letter-spacing: 0.02em;
}

.ideal-col {
    border-color: #cbd5e1;
    background: #f8fafc;
}

.esr-col {
    border-color: #fde68a;
    background: #fffbeb;
}

.derivation-steps {
    overflow-x: auto;
    padding: 4px 0 var(--ai-space-2);
    font-size: 0.9rem;
}

.derivation-esr-slider {
    margin-top: var(--ai-space-3);
    grid-template-columns: 1fr 64px 1fr;
}

.derivation-esr-slider label {
    font-size: 0.8rem;
}

.live-tf-columns {
    margin-top: 4px;
}

.live-tf-columns .derivation-col {
    background: transparent;
    border: none;
    padding: 0;
}

.live-tf-columns h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--ai-blue-800);
}

.live-tf-card {
    margin-top: var(--ai-space-4);
    padding: 16px 18px;
    background: linear-gradient(135deg, #f0f9ff 0%, #fff 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--ai-radius-lg);
    box-shadow: 0 1px 3px rgba(30, 64, 175, 0.06);
}

.live-tf-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ai-blue-800);
    margin-bottom: 10px;
}

.live-tf-eq {
    overflow-x: auto;
    font-size: 1.05rem;
    line-height: 1.6;
    padding: 4px 0;
}

.live-tf-alt {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed #cbd5e1;
    overflow-x: auto;
    font-size: 0.92rem;
    color: var(--ai-gray-700);
}

.chart-wrap {
    position: relative;
    height: 220px;
    width: 100%;
}

.chart-coordinates {
    font-size: 0.75rem;
    color: var(--ai-gray-600);
    margin-top: 6px;
    text-align: center;
}

.next-steps {
    max-width: none;
    margin: 0;
}

.next-links {
    margin: 12px 0 0 20px;
    line-height: 1.7;
}

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

@media (max-width: 1000px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }

    .workspace-right {
        position: static;
    }

    .chart-wrap {
        height: 260px;
    }

    .compare-scope-canvas {
        min-height: 400px;
        height: 400px;
    }

    .derivation-columns {
        grid-template-columns: 1fr;
    }

    .scope-readouts {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .input-row {
        grid-template-columns: 1fr;
    }

    .input-row input[type="number"] {
        max-width: 120px;
    }

    .controls-grid {
        grid-template-columns: 1fr;
    }

    .controls-grid .esr-only-row {
        grid-template-columns: 1fr;
    }

    .guide-compare {
        grid-template-columns: 1fr;
    }
}