/* M03K05 · Nodes and antinodes */
.nodes-chapter{padding-top:72px;scroll-margin-top:calc(var(--header-h) + 24px)}
.k05-header{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.55fr);gap:28px;align-items:end}.k05-header h1{margin:9px 0 14px;font-size:clamp(3.2rem,7vw,6.7rem);line-height:.91;letter-spacing:-.062em}.k05-header .lead{max-width:860px;color:var(--muted);font-size:1.08rem}.k05-index{padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}.k05-index>span,.nodes-card>span,.nodes-spacing-grid article>span,.nodes-phase-card>span,.nodes-limit-grid article>span{display:block;color:var(--accent);font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.k05-index strong{display:block;margin:7px 0 8px;font-size:1.04rem}.k05-index p{margin:0;color:var(--muted);font-size:.9rem}
.nodes-geometry,.nodes-phase,.nodes-limits{padding-top:72px}.nodes-equation-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:12px}.nodes-card,.nodes-phase-card,.nodes-limit-grid article{padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}.nodes-card.primary{background:linear-gradient(150deg,var(--panel-solid),var(--panel));border-color:var(--line-strong)}.nodes-card .equation{margin:14px 0}.nodes-card p,.nodes-phase-card p,.nodes-limit-grid p{margin:0;color:var(--muted);font-size:.9rem}
.nodes-spacing{margin-top:72px;padding:72px 0;background:var(--panel-solid)}.nodes-spacing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.nodes-spacing-grid article{padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}.nodes-spacing-grid article.key{border-color:var(--accent);background:linear-gradient(150deg,var(--panel-solid),var(--panel))}.nodes-spacing-grid strong{display:block;margin:9px 0;font-size:1.35rem}.nodes-spacing-grid p{margin:0;color:var(--muted);font-size:.9rem}.nodes-phase-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.nodes-phase-card.key{border-color:var(--line-strong)}.nodes-phase-card strong{display:block;margin:10px 0;font-size:1.25rem}
.nodes-lab-section{padding:82px 0}.nodes-lab-shell{display:grid;grid-template-columns:minmax(250px,310px) minmax(0,1fr);gap:16px;align-items:start}.nodes-controls{position:sticky;top:calc(var(--header-h) + 18px);display:grid;gap:14px;padding:20px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}.nodes-preset-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.nodes-preset-row button{padding:9px 10px;border:1px solid var(--line);border-radius:10px;background:var(--panel-solid);color:var(--text);font:inherit;font-size:.78rem;cursor:pointer}.nodes-preset-row button:hover,.nodes-preset-row button:focus-visible{border-color:var(--line-strong);background:var(--panel-solid)}.nodes-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;align-items:center}.nodes-status{grid-column:1/-1;display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.8rem}.nodes-status i{width:8px;height:8px;border-radius:50%;background:var(--accent-3);box-shadow:0 0 12px color-mix(in srgb,var(--accent-3) 70%,transparent)}.nodes-stage{min-width:0;display:grid;gap:14px}.nodes-panel{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel)}.nodes-panel-head{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:17px 20px;border-bottom:1px solid var(--line)}.nodes-panel-head span,.nodes-head-readout span{display:block;color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800}.nodes-panel-head strong{display:block;margin-top:4px}.nodes-head-readout{text-align:right}.nodes-field-svg{display:block;width:100%;min-height:350px;background:linear-gradient(180deg,color-mix(in srgb,var(--panel-solid) 75%,transparent),transparent)}.nodes-axis,.nodes-grid-line,.nodes-ruler-axis{stroke:var(--line-strong);stroke-width:1}.nodes-grid-line{opacity:.55}.nodes-envelope{fill:none;stroke:var(--accent-2);stroke-width:1.7;stroke-dasharray:7 7;opacity:.82}.nodes-wave{fill:none;stroke:var(--accent);stroke-width:3}.nodes-node-marker{fill:var(--bg);stroke:var(--accent-3);stroke-width:2.5}.nodes-anti-marker{fill:var(--accent-2);stroke:var(--bg);stroke-width:1.5}.nodes-marker-label,.nodes-axis-label,.nodes-probe-label,.nodes-ruler-label{fill:var(--muted);font-size:13px;font-weight:700}.nodes-probe-guide{stroke:var(--warm);stroke-width:1.5;stroke-dasharray:5 6}.nodes-probe-dot{fill:var(--warm);stroke:var(--bg);stroke-width:2}.nodes-legend{display:flex;flex-wrap:wrap;gap:16px;padding:12px 20px;border-top:1px solid var(--line);color:var(--muted);font-size:.78rem}.nodes-legend span{display:flex;align-items:center;gap:7px}.nodes-legend i{display:inline-block;width:24px;height:2px}.nodes-legend i.wave{background:var(--accent)}.nodes-legend i.env{border-top:2px dashed var(--accent-2);height:0}.nodes-legend b{width:9px;height:9px;border-radius:50%;display:inline-block}.nodes-legend b.node{border:2px solid var(--accent-3);background:var(--bg)}.nodes-legend b.anti{background:var(--accent-2)}.nodes-telemetry{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line)}.nodes-telemetry>div{padding:13px 14px;border-right:1px solid var(--line)}.nodes-telemetry>div:last-child{border-right:0}.nodes-telemetry span,.nodes-ruler-metrics span,.nodes-phase-metrics span{display:block;color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.06em}.nodes-telemetry strong,.nodes-ruler-metrics strong,.nodes-phase-metrics strong{display:block;margin-top:4px;font-size:.9rem}.nodes-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.nodes-ruler-svg{display:block;width:100%;min-height:260px}.nodes-ruler-segment{stroke-width:4;stroke-linecap:round}.nodes-ruler-segment.node{stroke:var(--accent-3)}.nodes-ruler-segment.anti{stroke:var(--accent-2)}.nodes-ruler-probe{fill:var(--warm);stroke:var(--bg);stroke-width:2}.nodes-ruler-metrics,.nodes-phase-metrics{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line)}.nodes-ruler-metrics>div,.nodes-phase-metrics>div{padding:13px 16px;border-right:1px solid var(--line)}.nodes-ruler-metrics>div:last-child,.nodes-phase-metrics>div:last-child{border-right:0}.nodes-phase-body{padding:22px}.nodes-sign-map{display:flex;min-height:48px;border:1px solid var(--line);border-radius:10px;overflow:hidden}.nodes-sign-segment{display:flex;align-items:center;justify-content:center;min-width:34px;padding:8px 4px;font-size:.72rem;font-weight:900;color:var(--text);border-right:1px solid var(--line)}.nodes-sign-segment:last-child{border-right:0}.nodes-sign-segment.positive{background:color-mix(in srgb,var(--accent) 20%,transparent)}.nodes-sign-segment.negative{background:color-mix(in srgb,var(--accent-2) 20%,transparent)}.nodes-phase-readout{padding:24px 0}.nodes-phase-readout>span{color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.07em}.nodes-phase-readout strong{display:block;margin:6px 0;font-size:1.3rem}.nodes-phase-readout p{margin:0;color:var(--muted);font-size:.9rem}.nodes-phase-metrics{margin:0 -22px -22px}.nodes-phase-metrics>div{padding-inline:14px}.nodes-reading-card{padding:22px;border:1px solid var(--line);border-radius:var(--radius-sm);background:linear-gradient(150deg,var(--panel-solid),var(--panel))}.nodes-reading-card h3{margin:7px 0 8px}.nodes-reading-card p{margin:0;color:var(--muted)}
.nodes-limit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.nodes-limit-grid strong{display:block;margin:9px 0}.nodes-takeaways{padding-top:72px}.nodes-next{margin-top:72px}.chapter-menu-link[href="#k05"].is-active span{color:var(--text)}
@media(max-width:1120px){.nodes-lab-shell{grid-template-columns:1fr}.nodes-controls{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}.nodes-preset-row,.nodes-actions{align-self:end}.nodes-telemetry{grid-template-columns:repeat(3,1fr)}.nodes-telemetry>div:nth-child(3){border-right:0}.nodes-telemetry>div:nth-child(-n+3){border-bottom:1px solid var(--line)}.nodes-detail-grid{grid-template-columns:1fr 1fr}}
@media(max-width:980px){.k05-header{grid-template-columns:1fr}.k05-index{max-width:700px}.nodes-equation-grid,.nodes-spacing-grid,.nodes-phase-row,.nodes-limit-grid{grid-template-columns:1fr 1fr}.nodes-equation-grid .primary,.nodes-spacing-grid .key{grid-column:1/-1}}
@media(max-width:760px){.nodes-chapter{padding-top:46px}.k05-header h1{font-size:clamp(2.7rem,15vw,4.6rem)}.nodes-equation-grid,.nodes-spacing-grid,.nodes-phase-row,.nodes-limit-grid,.nodes-detail-grid{grid-template-columns:1fr}.nodes-equation-grid .primary,.nodes-spacing-grid .key{grid-column:auto}.nodes-controls{grid-template-columns:1fr}.nodes-telemetry{grid-template-columns:1fr 1fr}.nodes-telemetry>div{border-bottom:1px solid var(--line)}.nodes-telemetry>div:nth-child(odd){border-right:1px solid var(--line)}.nodes-telemetry>div:nth-child(even){border-right:0}.nodes-telemetry>div:last-child{grid-column:1/-1;border-right:0;border-bottom:0}.nodes-field-svg{min-height:250px}.nodes-panel-head{align-items:flex-start}.nodes-ruler-metrics,.nodes-phase-metrics{grid-template-columns:1fr}.nodes-ruler-metrics>div,.nodes-phase-metrics>div{border-right:0;border-bottom:1px solid var(--line)}.nodes-ruler-metrics>div:last-child,.nodes-phase-metrics>div:last-child{border-bottom:0}.nodes-marker-label,.nodes-axis-label,.nodes-probe-label,.nodes-ruler-label{font-size:15px}}
@media(max-width:390px){.nodes-preset-row{grid-template-columns:1fr}.nodes-panel-head{padding:14px}.nodes-legend{padding-inline:14px;gap:10px}.nodes-card,.nodes-phase-card,.nodes-limit-grid article,.nodes-reading-card{padding:18px}}
@media(max-width:760px){.nodes-marker-label,.nodes-axis-label,.nodes-probe-label{font-size:18px}.nodes-ruler-label{font-size:20px}.nodes-ruler-svg{min-height:190px}}