.primitive-spectrum { display: grid; margin-top: 22px; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.primitive-spectrum article { display: grid; min-width: 0; padding: 15px; grid-template-columns: 48px minmax(0, 1fr); align-items: center; gap: 11px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255, 255, 255, .022); }
.primitive-icon { display: grid; width: 48px; height: 48px; place-items: center; border-radius: 9px; color: var(--green); background: rgba(97, 227, 165, .08); font: 500 .7rem/1 var(--mono); }
.double-icon { color: var(--blue); background: rgba(107, 188, 255, .08); }
.char-icon { color: var(--yellow); background: rgba(255, 209, 102, .08); }
.bool-icon { color: var(--purple); background: rgba(184, 161, 255, .08); }
.primitive-spectrum small { color: var(--green); font: 500 .58rem/1.3 var(--mono); }
.primitive-spectrum h3 { margin: 3px 0; font-size: .88rem; }
.primitive-spectrum p { margin: 0; color: var(--muted); font-size: .69rem; }
.primitive-warning { display: grid; margin-top: 14px; padding: 14px; grid-template-columns: 38px minmax(0, 1fr); align-items: center; gap: 10px; border-left: 3px solid var(--yellow); border-radius: 0 9px 9px 0; background: rgba(255, 209, 102, .055); }
.primitive-warning i { display: grid; width: 38px; height: 38px; place-items: center; color: var(--yellow); }
.primitive-warning p { margin: 0; color: #dedacb; font-size: .78rem; }
.abstract-data-block { display: grid; margin-top: 16px; grid-template-columns: minmax(250px, .7fr) minmax(0, 1.3fr); overflow: hidden; border: 1px solid rgba(184, 161, 255, .3); border-radius: 12px; background: #091216; }
.abstract-question { padding: 22px; border-right: 1px solid var(--line); background: rgba(184, 161, 255, .05); }
.abstract-question small, .abstract-question strong { display: block; }
.abstract-question small { color: var(--purple); font: 500 .58rem/1.3 var(--mono); text-transform: uppercase; }
.abstract-question strong { margin: 7px 0; font-size: 1rem; line-height: 1.35; }
.abstract-question p { margin: 0; color: var(--muted); font-size: .76rem; }
.abstraction-layers { display: grid; padding: 20px; grid-template-columns: 1fr 34px 1fr 34px 1fr; align-items: center; }
.abstraction-layers > div { display: grid; min-width: 0; gap: 6px; }
.abstraction-layers > i { color: var(--green); text-align: center; }
.abstraction-layers small { color: var(--muted); font: 400 .52rem/1.3 var(--mono); text-align: center; text-transform: uppercase; }
.abstraction-layers div > span { padding: 6px; border: 1px solid var(--line); border-radius: 6px; color: var(--muted); font-size: .6rem; text-align: center; }
.abstract-object { padding: 13px; border: 1px solid var(--green); border-radius: 9px; background: rgba(97, 227, 165, .07); text-align: center; }
.abstract-object strong { color: var(--green); font-size: 1rem; }
.abstract-object span { border: 0 !important; padding: 0 !important; }

.organization-comparison { display: grid; margin-top: 22px; grid-template-columns: minmax(0, 1fr) 58px minmax(0, 1fr); align-items: stretch; }
.organization-comparison > article { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #091216; }
.loose-variables { border-color: rgba(255, 133, 133, .32) !important; }
.array-collection { border-color: rgba(97, 227, 165, .32) !important; }
.comparison-title { display: grid; padding: 14px; grid-template-columns: 36px minmax(0, 1fr); align-items: center; gap: 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .025); }
.bad-mark, .good-mark { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 8px; color: var(--red); background: rgba(255, 133, 133, .08); }
.good-mark { color: var(--green); background: rgba(97, 227, 165, .08); }
.comparison-title small { color: var(--muted); font: 400 .53rem/1.3 var(--mono); text-transform: uppercase; }
.comparison-title h3 { margin: 2px 0 0; font-size: .9rem; }
.organization-comparison pre { min-height: 190px; padding: 16px; font-size: .67rem; }
.organization-comparison ul { display: grid; margin: 0; padding: 0 17px 17px 35px; gap: 5px; color: var(--muted); font-size: .71rem; }
.comparison-arrow { display: grid; place-items: center; align-content: center; gap: 5px; color: var(--yellow); }
.comparison-arrow span { color: var(--muted); font: 400 .51rem/1.3 var(--mono); text-transform: uppercase; writing-mode: vertical-rl; }
.student-array { display: grid; margin: 18px 16px 0; grid-template-columns: repeat(3, 1fr); }
.student-array span { position: relative; display: grid; min-height: 56px; place-items: center; border: 1px solid rgba(97, 227, 165, .45); border-right: 0; color: var(--text); background: #123326; font: 500 .67rem/1 var(--mono); }
.student-array span:first-child { border-radius: 8px 0 0 8px; }
.student-array span:last-child { border-right: 1px solid rgba(97, 227, 165, .45); border-radius: 0 8px 8px 0; }
.student-array small { position: absolute; top: -13px; color: var(--muted); font: 400 .5rem/1 var(--mono); }
.array-collection pre { min-height: 116px; }
.concept-conclusion { display: flex; margin-top: 14px; padding: 14px; flex-wrap: wrap; gap: 7px; border: 1px dashed var(--line-strong); border-radius: 9px; font-size: .78rem; }
.concept-conclusion strong { color: var(--green); }
.concept-conclusion span { color: var(--muted); }

.student-evolution { display: grid; margin-top: 22px; grid-template-columns: 1fr 52px 1fr; align-items: center; }
.student-evolution > i { color: var(--yellow); text-align: center; }
.scattered-student, .structured-student { padding: 18px; border: 1px solid var(--line); border-radius: 11px; background: #091216; }
.scattered-student > small, .structured-student > small { display: block; margin-bottom: 10px; color: var(--muted); font: 500 .55rem/1.3 var(--mono); text-transform: uppercase; }
.scattered-student > code { display: block; margin-top: 6px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; color: var(--red); font-size: .62rem; }
.fragile-links { position: relative; display: grid; margin-top: 12px; grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
.fragile-links span { border-top: 1px dashed var(--red); }
.fragile-links strong { grid-column: 1 / -1; color: var(--muted); font-size: .65rem; font-weight: 500; text-align: center; }
.student-object-card { overflow: hidden; border: 1px solid rgba(97, 227, 165, .4); border-radius: 9px; }
.student-object-card > strong { display: block; padding: 10px; color: var(--green); background: rgba(97, 227, 165, .08); font: 500 .7rem/1.3 var(--mono); }
.student-object-card > span { display: grid; padding: 9px 11px; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); font-size: .68rem; }
.student-object-card code { color: var(--muted); }
.student-object-card b { color: var(--text); font-weight: 500; text-align: right; }
.struct-oop-grid { display: grid; margin-top: 14px; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.struct-oop-grid article { overflow: hidden; border: 1px solid var(--line); border-radius: 11px; background: #091216; }
.model-label { display: grid; padding: 13px; grid-template-columns: 38px minmax(0, 1fr); align-items: center; gap: 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .025); }
.model-label > i { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 8px; color: var(--green); background: rgba(97, 227, 165, .08); }
.model-label small, .model-label strong { display: block; }
.model-label small { color: var(--muted); font: 400 .52rem/1.3 var(--mono); text-transform: uppercase; }
.model-label strong { color: var(--green); }
.struct-oop-grid pre { padding: 16px; }
.struct-oop-grid article > p { margin: 0; padding: 0 16px 16px; color: var(--muted); font-size: .73rem; }
.oop-definition { display: grid; margin-top: 14px; padding: 15px; grid-template-columns: 38px minmax(0, 1fr); align-items: center; gap: 10px; border-left: 3px solid var(--blue); border-radius: 0 9px 9px 0; background: rgba(107, 188, 255, .055); }
.oop-definition i { display: grid; width: 38px; height: 38px; place-items: center; color: var(--blue); }
.oop-definition p { margin: 0; color: #d6e1e5; font-size: .78rem; }

.object-organization-map { display: grid; margin-top: 22px; gap: 14px; }
.object-source { max-width: 520px; margin: 0 auto; padding: 15px; border: 1px solid var(--line); border-radius: 10px; background: #091216; text-align: center; }
.object-source small { display: block; margin-bottom: 8px; color: var(--muted); font: 400 .52rem/1.3 var(--mono); text-transform: uppercase; }
.object-source div { display: flex; justify-content: center; gap: 7px; }
.object-source span { padding: 7px 11px; border: 1px solid rgba(107, 188, 255, .35); border-radius: 7px; color: var(--blue); background: rgba(107, 188, 255, .06); font: 500 .62rem/1 var(--mono); }
.organization-paths { position: relative; display: grid; margin-top: 34px; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.organization-paths::before { position: absolute; top: -34px; left: 50%; height: 34px; border-left: 2px dashed var(--line-strong); content: ""; }
.organization-paths article { overflow: hidden; border: 1px solid var(--line); border-radius: 11px; background: #091216; }
.path-heading { display: grid; padding: 13px; grid-template-columns: 38px minmax(0, 1fr); align-items: center; gap: 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .025); }
.path-heading > i { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 8px; color: var(--green); background: rgba(97, 227, 165, .08); }
.graph-path .path-heading > i { color: var(--purple); background: rgba(184, 161, 255, .08); }
.path-heading small, .path-heading strong { display: block; }
.path-heading small { color: var(--muted); font: 400 .52rem/1.3 var(--mono); text-transform: uppercase; }
.path-heading strong { font-size: .86rem; }
.linear-list { display: flex; min-height: 145px; padding: 25px 18px; align-items: center; justify-content: center; gap: 8px; }
.linear-list span { padding: 10px 14px; border: 1px solid var(--green); border-radius: 8px; color: var(--text); background: #123326; font: 500 .65rem/1 var(--mono); }
.linear-list i { color: var(--green); font-size: .7rem; }
.graph-path svg { display: block; width: 100%; height: 145px; padding: 8px; }
.graph-path svg line { stroke: #54717d; stroke-width: 2; }
.graph-path svg circle { fill: #211d35; stroke: var(--purple); stroke-width: 2; }
.graph-path svg text { fill: var(--text); font: 600 12px var(--display); text-anchor: middle; }
.organization-paths article > p { min-height: 62px; margin: 0; padding: 0 15px; color: var(--muted); font-size: .72rem; }
.organization-paths article > code { display: block; margin: 12px 15px 15px; padding: 9px; border: 1px solid var(--line); border-radius: 7px; color: var(--green); background: var(--surface); font-size: .62rem; text-align: center; }
.list-explanation { display: grid; margin-top: 14px; padding: 14px; grid-template-columns: 190px minmax(0, 1fr); gap: 12px; border: 1px dashed var(--line-strong); border-radius: 9px; font-size: .76rem; }
.list-explanation strong { color: var(--green); }
.list-explanation span { color: var(--muted); }

.graph-use-grid { display: grid; margin-top: 22px; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.graph-use-grid > article { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #091216; }
.graph-example-heading { display: grid; padding: 14px; grid-template-columns: 40px minmax(0, 1fr); align-items: center; gap: 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .025); }
.graph-example-heading > i { display: grid; width: 40px; height: 40px; place-items: center; border-radius: 9px; color: var(--green); background: rgba(97, 227, 165, .08); }
.bank-network-example .graph-example-heading > i { color: var(--yellow); background: rgba(255, 209, 102, .08); }
.graph-example-heading small, .graph-example-heading strong { display: block; }
.graph-example-heading small { color: var(--muted); font: 400 .52rem/1.3 var(--mono); text-transform: uppercase; }
.graph-example-heading strong { font-size: .9rem; }
.social-graph, .bank-graph { display: block; width: 100%; height: auto; padding: 10px; }
.social-edges path { fill: none; stroke: #58727d; stroke-width: 3; marker-end: url(#social-arrow); }
.social-graph marker path { fill: var(--green); }
.edge-labels text, .bank-labels text { fill: var(--muted); font: 500 10px var(--mono); text-anchor: middle; }
.social-node circle { fill: #143426; stroke: var(--green); stroke-width: 3; }
.social-node.target-node circle { fill: #211d35; stroke: var(--purple); }
.social-node text { fill: var(--muted); font: 500 10px var(--mono); text-anchor: middle; }
.social-node .node-name { fill: var(--text); font: 700 16px var(--display); }
.bank-edges line { stroke: #58727d; stroke-width: 3; }
.entity-node rect { fill: #14242a; stroke: var(--blue); stroke-width: 2; }
.entity-node.account-entity rect { fill: #143426; stroke: var(--green); }
.entity-node.device-entity rect { fill: #302819; stroke: var(--yellow); }
.entity-node text { fill: var(--muted); font: 500 10px var(--mono); text-anchor: middle; }
.entity-node .entity-name { fill: var(--text); font: 700 15px var(--display); }
.graph-use-grid article > p { margin: 0; padding: 0 17px 17px; color: var(--muted); font-size: .76rem; }
.graph-use-grid article > p strong { color: var(--green); }
.graph-use-grid article > p code { color: var(--yellow); font-size: .65rem; }
.graph-database-explanation { display: grid; margin-top: 14px; padding: 17px; grid-template-columns: minmax(230px, .7fr) minmax(0, 1.3fr); align-items: center; gap: 18px; border: 1px solid rgba(184, 161, 255, .3); border-radius: 11px; background: rgba(184, 161, 255, .05); }
.graph-database-explanation small { color: var(--purple); font: 500 .56rem/1.3 var(--mono); text-transform: uppercase; }
.graph-database-explanation h3 { margin: 4px 0; font-size: 1rem; }
.graph-database-explanation p { margin: 0; color: var(--muted); font-size: .74rem; }
.property-graph-mini { display: flex; min-width: 0; align-items: center; justify-content: center; gap: 10px; }
.property-node { display: grid; min-width: 120px; padding: 10px; border: 1px solid var(--purple); border-radius: 9px; background: #211d35; text-align: center; }
.property-node small, .property-node strong, .property-node code { display: block; }
.property-node small { color: var(--purple); }
.property-node strong { color: var(--text); }
.property-node code { color: var(--muted); font-size: .54rem; }
.property-edge { display: grid; justify-items: center; color: var(--green); }
.property-edge code { font-size: .55rem; }
.graph-takeaway { display: grid; margin-top: 14px; padding: 15px; grid-template-columns: 40px minmax(0, 1fr); align-items: center; gap: 10px; border-left: 3px solid var(--green); border-radius: 0 9px 9px 0; background: rgba(97, 227, 165, .05); }
.graph-takeaway i { display: grid; width: 40px; height: 40px; place-items: center; color: var(--green); }
.graph-takeaway p { margin: 0; color: #d7e2dd; font-size: .78rem; }

@media (max-width: 940px) {
  .primitive-spectrum { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .abstract-data-block { grid-template-columns: 1fr; }
  .abstract-question { border-right: 0; border-bottom: 1px solid var(--line); }
  .organization-comparison { grid-template-columns: 1fr; gap: 8px; }
  .comparison-arrow { min-height: 34px; transform: rotate(90deg); }
  .comparison-arrow span { display: none; }
  .struct-oop-grid,
  .graph-use-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .primitive-spectrum,
  .organization-paths { grid-template-columns: 1fr; }
  .abstraction-layers { grid-template-columns: 1fr; gap: 7px; }
  .abstraction-layers > i { min-height: 24px; transform: rotate(90deg); }
  .student-evolution { grid-template-columns: 1fr; gap: 8px; }
  .student-evolution > i { min-height: 28px; transform: rotate(90deg); }
  .organization-paths article > p { min-height: 0; }
  .list-explanation,
  .graph-database-explanation { grid-template-columns: 1fr; }
  .property-graph-mini { flex-direction: column; }
  .property-edge { transform: rotate(90deg); }
}