:root {
  --bsp-green: #087a3c;
  --bsp-green-dark: #075c31;
  --bsp-green-soft: #eaf6ef;
  --bsp-ink: #263242;
  --bsp-muted: #5d6875;
  --bsp-line: #d8e0e6;
  --bsp-panel: #f5f7f8;
  --bsp-warn: #9a4b00;
  --bsp-warn-bg: #fff4e6;
}

.single-post .bsp-guide {
  color: var(--bsp-ink);
  font-size: 18px;
  line-height: 1.72;
}

.single-post .bsp-guide * {
  box-sizing: border-box;
}

.single-post .bsp-guide h2,
.single-post .bsp-guide h3 {
  color: var(--bsp-ink);
  scroll-margin-top: 110px;
}

.single-post .bsp-guide h2 {
  margin: 2.2em 0 .7em;
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1.25;
}

.single-post .bsp-guide h3 {
  margin: 1.55em 0 .45em;
  font-size: clamp(1.18rem, 2.4vw, 1.4rem);
  line-height: 1.35;
}

.single-post .bsp-guide p,
.single-post .bsp-guide ul,
.single-post .bsp-guide ol {
  margin-top: 0;
  margin-bottom: 1.15em;
}

.single-post .bsp-guide a:not(.bsp-guide-button) {
  color: var(--bsp-green-dark);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.single-post .bsp-guide a:not(.bsp-guide-button):hover,
.single-post .bsp-guide a:not(.bsp-guide-button):focus-visible {
  color: #034d27;
  text-decoration-thickness: 2px;
}

.bsp-guide-lead {
  margin: 0 0 2rem;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid #cfe2d7;
  border-left: 6px solid var(--bsp-green);
  border-radius: 18px;
  background: linear-gradient(135deg, #f8fcfa 0%, var(--bsp-green-soft) 100%);
  box-shadow: 0 14px 34px rgba(28, 54, 42, .08);
}

.bsp-guide-eyebrow {
  margin-bottom: .55rem !important;
  color: var(--bsp-green-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .055em;
  line-height: 1.4;
  text-transform: uppercase;
}

.bsp-guide-intro {
  margin-bottom: 1.4rem !important;
  color: var(--bsp-ink);
  font-size: clamp(1.12rem, 2.5vw, 1.32rem);
  line-height: 1.62;
}

.bsp-quick-answer {
  padding-top: 1.2rem;
  border-top: 1px solid #c7ddd1;
}

.single-post .bsp-guide .bsp-quick-answer h2 {
  margin: 0 0 .7rem;
  font-size: 1.25rem;
}

.bsp-quick-answer ul,
.bsp-checklist {
  padding-left: 0;
  list-style: none;
}

.bsp-quick-answer li,
.bsp-checklist li {
  position: relative;
  margin: .55rem 0;
  padding-left: 1.75rem;
}

.bsp-quick-answer li::before,
.bsp-checklist li::before {
  position: absolute;
  top: .15em;
  left: 0;
  color: var(--bsp-green);
  content: "✓";
  font-weight: 900;
}

.bsp-toc {
  margin: 2rem 0 2.6rem;
  padding: 1.35rem 1.55rem;
  border: 1px solid var(--bsp-line);
  border-radius: 14px;
  background: #fff;
}

.bsp-toc-title {
  margin-bottom: .65rem !important;
  color: var(--bsp-ink);
  font-size: 1.05rem;
  font-weight: 800;
}

.bsp-toc ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .35rem 2rem;
  margin: 0 !important;
  padding-left: 1.4rem;
}

.bsp-toc li {
  margin: .15rem 0;
}

.bsp-definition-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}

.bsp-definition-grid article {
  padding: 1.2rem;
  border: 1px solid var(--bsp-line);
  border-radius: 14px;
  background: var(--bsp-panel);
}

.single-post .bsp-guide .bsp-definition-grid h3 {
  margin-top: 0;
}

.bsp-table-wrap {
  margin: 1.6rem 0 2rem;
  overflow-x: auto;
  border: 1px solid var(--bsp-line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(31, 43, 55, .06);
  -webkit-overflow-scrolling: touch;
}

.single-post .bsp-guide table {
  width: 100%;
  min-width: 620px;
  margin: 0;
  border: 0;
  border-collapse: collapse;
  font-size: .94rem;
  line-height: 1.5;
}

.single-post .bsp-guide th,
.single-post .bsp-guide td {
  padding: .85rem 1rem;
  border: 0;
  border-bottom: 1px solid var(--bsp-line);
  vertical-align: top;
  text-align: left;
}

.single-post .bsp-guide th {
  color: #fff;
  background: var(--bsp-green-dark);
  font-weight: 800;
}

.single-post .bsp-guide tbody tr:nth-child(even) {
  background: #f7faf8;
}

.single-post .bsp-guide tbody tr:last-child td {
  border-bottom: 0;
}

.bsp-steps {
  padding-left: 0;
  counter-reset: bsp-step;
  list-style: none;
}

.bsp-steps > li {
  position: relative;
  margin: .85rem 0;
  padding: .8rem 1rem .8rem 3.5rem;
  border-left: 3px solid #b8d9c6;
  background: #f8faf9;
  counter-increment: bsp-step;
}

.bsp-steps > li::before {
  position: absolute;
  top: .7rem;
  left: .8rem;
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--bsp-green);
  content: counter(bsp-step);
  font-size: .82rem;
  font-weight: 800;
}

.bsp-note,
.bsp-formula {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-left: 5px solid var(--bsp-green);
  background: var(--bsp-green-soft);
}

.bsp-note-warning {
  border-left-color: var(--bsp-warn);
  color: #512900;
  background: var(--bsp-warn-bg);
}

.bsp-formula {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem 1.4rem;
}

.bsp-formula strong {
  font-family: "Roboto Slab", Georgia, serif;
  font-size: 1.28rem;
}

.bsp-formula span {
  color: var(--bsp-muted);
  font-size: .92rem;
}

.bsp-related,
.bsp-sources,
.bsp-faq,
.bsp-final-check {
  margin-top: 3rem;
  padding-top: .5rem;
  border-top: 2px solid var(--bsp-line);
}

.bsp-related ul,
.bsp-sources ol {
  padding-left: 1.25rem;
}

.bsp-related li,
.bsp-sources li {
  margin: .7rem 0;
}

.bsp-related li span,
.bsp-sources li span {
  display: block;
  margin-top: .1rem;
  color: var(--bsp-muted);
  font-size: .9rem;
}

.bsp-faq-item {
  margin: .7rem 0;
  border: 1px solid var(--bsp-line);
  border-radius: 12px;
  background: #fff;
}

.bsp-faq-item summary {
  position: relative;
  padding: 1rem 3rem 1rem 1.15rem;
  color: var(--bsp-ink);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

.bsp-faq-item summary::-webkit-details-marker {
  display: none;
}

.bsp-faq-item summary::after {
  position: absolute;
  top: .75rem;
  right: 1rem;
  color: var(--bsp-green);
  content: "+";
  font-size: 1.5rem;
  line-height: 1;
}

.bsp-faq-item[open] summary::after {
  content: "−";
}

.bsp-faq-item summary:focus-visible {
  outline: 3px solid rgba(8, 122, 60, .35);
  outline-offset: 2px;
}

.bsp-faq-answer {
  padding: 0 1.15rem 1rem;
  color: var(--bsp-muted);
}

.bsp-faq-answer p {
  margin: 0 !important;
}

.bsp-guide-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin: 3rem 0 1rem;
  padding: clamp(1.3rem, 4vw, 2.1rem);
  border-radius: 18px;
  color: #fff;
  background: linear-gradient(135deg, var(--bsp-green-dark), #0a8d49);
}

.single-post .bsp-guide .bsp-guide-cta h2,
.single-post .bsp-guide .bsp-guide-cta p {
  color: #fff;
}

.single-post .bsp-guide .bsp-guide-cta h2 {
  margin: .15rem 0 .45rem;
}

.single-post .bsp-guide .bsp-guide-cta p:last-child {
  margin-bottom: 0;
}

.single-post .bsp-guide .bsp-guide-cta .bsp-guide-eyebrow {
  color: #d7f2e3;
}

.bsp-guide-button {
  flex: 0 0 auto;
  padding: .85rem 1.15rem;
  border: 2px solid #fff;
  border-radius: 9px;
  color: var(--bsp-green-dark);
  background: #fff;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
}

.bsp-guide-button:hover,
.bsp-guide-button:focus-visible {
  color: #fff;
  background: transparent;
}

/* Visual explainers */
.bsp-visual {
  margin: 2.4rem 0;
  padding: clamp(1.15rem, 4vw, 1.8rem);
  border: 1px solid var(--bsp-line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(33, 47, 59, .08);
}

.single-post .bsp-guide .bsp-visual h2 {
  margin: .1rem 0 1.2rem;
  font-size: clamp(1.35rem, 2.7vw, 1.75rem);
}

.bsp-visual-canvas {
  padding: clamp(.5rem, 2vw, 1rem);
  border-radius: 13px;
  background: var(--bsp-panel);
}

.bsp-visual figcaption {
  margin-top: .8rem;
  color: var(--bsp-muted);
  font-size: .86rem;
  line-height: 1.5;
}

.bsp-visual-pair,
.bsp-method-compare,
.bsp-unit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.bsp-visual-panel,
.bsp-method-compare > div,
.bsp-unit-grid > div {
  padding: 1rem;
  border: 1px solid var(--bsp-line);
  border-radius: 12px;
  background: #fff;
}

.single-post .bsp-guide .bsp-visual-panel h3,
.single-post .bsp-guide .bsp-method-compare h3,
.single-post .bsp-guide .bsp-unit-grid h3 {
  margin: 0 0 .5rem;
  text-align: center;
}

.bsp-visual svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.bsp-visual svg text {
  fill: var(--bsp-muted);
  font-family: Roboto, Arial, sans-serif;
  font-size: 14px;
}

.bsp-v-axis {
  fill: none;
  stroke: #40505e;
  stroke-width: 3;
}

.bsp-v-grid {
  fill: none;
  stroke: #bbc5cc;
  stroke-width: 1.5;
}

.bsp-v-rotor {
  fill: #dce5e9;
  stroke: #51616e;
  stroke-width: 3;
}

.bsp-v-mass,
.bsp-v-bar,
.bsp-v-point {
  fill: var(--bsp-green);
}

.bsp-v-mass-alt,
.bsp-v-bar-alt {
  fill: #d47a17;
}

.bsp-v-force,
.bsp-v-series {
  fill: none;
  stroke: var(--bsp-green);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 6;
}

.bsp-v-force-alt {
  fill: none;
  stroke: #d47a17;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 6;
}

.bsp-v-plane,
.bsp-v-plane-alt {
  fill: none;
  stroke: var(--bsp-green);
  stroke-dasharray: 8 6;
  stroke-width: 4;
}

.bsp-v-plane-alt {
  stroke: #d47a17;
}

.bsp-v-alert {
  fill: none;
  stroke: var(--bsp-warn);
  stroke-dasharray: 8 6;
  stroke-width: 2;
}

.bsp-flow {
  max-width: 820px;
  margin: auto;
}

.bsp-flow-node {
  padding: .85rem 1rem;
  border: 1px solid var(--bsp-line);
  border-radius: 10px;
  background: #fff;
  text-align: center;
}

.bsp-flow-node strong,
.bsp-flow-node span {
  display: block;
}

.bsp-flow-node span {
  margin-top: .25rem;
  color: var(--bsp-muted);
  font-size: .84rem;
}

.bsp-flow-start,
.bsp-flow-result {
  border-color: #94c8aa;
  color: var(--bsp-green-dark);
  background: var(--bsp-green-soft);
  font-weight: 800;
}

.bsp-flow-arrow {
  color: var(--bsp-green);
  font-size: 1.7rem;
  font-weight: 900;
  line-height: 1.3;
  text-align: center;
}

.bsp-flow-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .75rem;
}

.bsp-visual-steps {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: .65rem;
  margin: 0 !important;
  padding: 0;
  list-style: none;
}

.bsp-visual-steps li {
  position: relative;
  min-width: 0;
  padding: .8rem .55rem;
  border: 1px solid var(--bsp-line);
  border-radius: 10px;
  background: #fff;
  text-align: center;
}

.bsp-visual-steps li:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -.65rem;
  z-index: 2;
  color: var(--bsp-green);
  content: "›";
  font-size: 1.3rem;
  font-weight: 900;
  transform: translateY(-50%);
}

.bsp-visual-steps span {
  display: grid;
  width: 1.7rem;
  height: 1.7rem;
  margin: 0 auto .45rem;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--bsp-green);
  font-size: .75rem;
  font-weight: 800;
}

.bsp-visual-steps strong,
.bsp-visual-steps small {
  display: block;
}

.bsp-visual-steps strong {
  font-size: .82rem;
  line-height: 1.3;
}

.bsp-visual-steps small {
  margin-top: .3rem;
  color: var(--bsp-muted);
  font-size: .68rem;
  line-height: 1.35;
}

.bsp-method-compare > div {
  text-align: center;
}

.bsp-method-object {
  margin: .6rem 0 !important;
  padding: .85rem;
  border-radius: 50%;
  color: var(--bsp-green-dark);
  background: var(--bsp-green-soft);
  font-weight: 800;
}

.bsp-method-compare strong {
  display: block;
  color: var(--bsp-green-dark);
}

.bsp-cause-wheel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .7rem;
  align-items: stretch;
}

.bsp-cause-core,
.bsp-cause-item {
  display: flex;
  min-height: 110px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: .8rem;
  border-radius: 50%;
  text-align: center;
}

.bsp-cause-core {
  grid-column: 2;
  grid-row: 1 / span 2;
  color: #fff;
  background: var(--bsp-green-dark);
  font-weight: 800;
}

.bsp-cause-item {
  border: 1px solid var(--bsp-line);
  background: #fff;
}

.bsp-cause-item strong,
.bsp-cause-item span {
  display: block;
}

.bsp-cause-item span {
  color: var(--bsp-muted);
  font-size: .72rem;
  line-height: 1.3;
}

.bsp-unit-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.bsp-unit-grid > div {
  position: relative;
  text-align: center;
}

.bsp-unit-symbol {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  margin: 0 auto .6rem;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--bsp-green);
  font: italic 700 1.1rem Georgia, serif;
}

.bsp-unit-grid p,
.bsp-unit-grid small {
  color: var(--bsp-muted);
  font-size: .77rem;
}

.bsp-unit-band {
  height: .55rem;
  margin: .7rem 0 .35rem;
  overflow: hidden;
  border-radius: 10px;
  background: #dfe5e8;
}

.bsp-unit-band i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--bsp-green);
}

.bsp-standard-chain {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: .7rem;
  align-items: center;
}

.bsp-standard-chain > div {
  min-height: 170px;
  padding: 1rem;
  border: 1px solid var(--bsp-line);
  border-radius: 12px;
  background: #fff;
  text-align: center;
}

.bsp-standard-chain > b {
  color: var(--bsp-green);
  font-size: 1.5rem;
}

.bsp-standard-chain span {
  display: grid;
  width: 2rem;
  height: 2rem;
  margin: 0 auto .5rem;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--bsp-green);
  font-weight: 800;
}

.single-post .bsp-guide .bsp-standard-chain h3 {
  margin: 0;
}

.bsp-standard-chain p {
  color: var(--bsp-muted);
  font-size: .78rem;
}

.bsp-standard-chain strong {
  color: var(--bsp-green-dark);
  font-size: .84rem;
}

@media (max-width: 800px) {
  .bsp-toc ol,
  .bsp-definition-grid,
  .bsp-unit-grid {
    grid-template-columns: 1fr;
  }

  .bsp-visual-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .bsp-visual-steps li:nth-child(3)::after {
    display: none;
  }
}

@media (max-width: 600px) {
  .single-post .bsp-guide {
    font-size: 16px;
  }

  .bsp-guide-lead,
  .bsp-visual,
  .bsp-toc {
    border-radius: 12px;
  }

  .bsp-visual-pair,
  .bsp-method-compare,
  .bsp-flow-grid,
  .bsp-standard-chain {
    grid-template-columns: 1fr;
  }

  .bsp-standard-chain > b {
    transform: rotate(90deg);
    text-align: center;
  }

  .bsp-visual-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bsp-visual-steps li:nth-child(3)::after {
    display: block;
  }

  .bsp-visual-steps li:nth-child(even)::after {
    display: none;
  }

  .bsp-cause-wheel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .bsp-cause-core {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 85px;
    border-radius: 14px;
  }

  .bsp-cause-item {
    min-height: 115px;
  }

  .bsp-guide-cta {
    align-items: stretch;
    flex-direction: column;
  }

  .bsp-guide-button {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bsp-guide *,
  .bsp-guide *::before,
  .bsp-guide *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media print {
  .bsp-guide-cta {
    color: var(--bsp-ink);
    background: #fff;
    border: 1px solid var(--bsp-line);
  }

  .bsp-guide-button {
    display: none;
  }
}