:root {
  --sd-bg: #F2F7F4;
  --sd-paper: #FAFDFB;
  --sd-grid-line: #CBE0D6;
  --sd-emerald-deep: #0B2E22;
  --sd-emerald-mid: #0E7C5B;
  --sd-persimmon: #FF5A26;
  --sd-persimmon-dark: #DF4312;
  --sd-amber: #D97706;
  --sd-cobalt: #1D4ED8;
  --sd-ink: #101815;
  --sd-muted: #42584F;
  --sd-border: #123528;
  --sd-mono: 'IBM Plex Mono', monospace;
  --sd-display: 'Space Grotesk', 'Inter', sans-serif;
  --sd-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--sd-bg);
  color: var(--sd-ink);
  font-family: var(--sd-sans);
}

body.sd-body {
  margin: 0;
  background-color: var(--sd-bg);
  background-image:
    linear-gradient(to right, rgba(11, 46, 34, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 46, 34, 0.055) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--sd-ink);
  line-height: 1.55;
  overflow-x: hidden;
}

.sd-skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--sd-persimmon);
  color: #FFFFFF;
  padding: 8px 14px;
  font-family: var(--sd-mono);
  font-size: 13px;
  z-index: 1000;
}

.sd-skip-link:focus {
  left: 12px;
}

.sd-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.sd-container {
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Coordinate Axis Ruler Ribbon */
.sd-ruler-strip {
  background: var(--sd-emerald-deep);
  color: #E7F5EE;
  border-bottom: 2px solid var(--sd-ink);
  font-family: var(--sd-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.sd-ruler-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
}

.sd-ruler-tag {
  color: #FF855E;
  font-weight: 700;
}

.sd-ruler-coords {
  opacity: 0.85;
}

.sd-ruler-rate {
  background: rgba(255, 90, 38, 0.2);
  border: 1px solid #FF855E;
  color: #FFFFFF;
  padding: 2px 8px;
  font-weight: 600;
}

/* Header */
.sd-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(242, 247, 244, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--sd-border);
}

.sd-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 66px;
  flex-wrap: wrap;
}

.sd-brand-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sd-mono);
}

.sd-brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--sd-emerald-deep);
  font-weight: 700;
  font-size: 17px;
}

.sd-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  border: 2px solid var(--sd-ink);
  font-weight: 700;
}

.sd-brand-sep {
  color: var(--sd-muted);
}

.sd-brand-crumb {
  font-size: 13px;
  font-weight: 600;
  color: var(--sd-persimmon-dark);
  background: #FFEAE2;
  border: 1px solid var(--sd-persimmon);
  padding: 2px 8px;
}

.sd-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.sd-nav-link {
  color: var(--sd-ink);
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

.sd-nav-link:hover {
  color: var(--sd-persimmon-dark);
  border-bottom-color: var(--sd-persimmon);
}

.sd-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sd-lang-select {
  font-family: var(--sd-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 7px 10px;
  background: var(--sd-paper);
  color: var(--sd-ink);
  border: 2px solid var(--sd-border);
  cursor: pointer;
}

.sd-btn-top {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  background: var(--sd-persimmon);
  color: #FFFFFF;
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 13px;
  font-weight: 700;
  border: 2px solid var(--sd-ink);
  box-shadow: 3px 3px 0 var(--sd-emerald-deep);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.sd-btn-top:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--sd-emerald-deep);
}

/* Hero Section */
.sd-hero {
  padding: 44px 0 56px;
  border-bottom: 2px solid var(--sd-border);
}

.sd-hero-masthead {
  max-width: 980px;
  margin-bottom: 36px;
}

.sd-kicker-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  font-family: var(--sd-mono);
  font-size: 12px;
}

.sd-kicker-pill {
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  padding: 4px 10px;
  font-weight: 700;
  border: 1.5px solid var(--sd-ink);
}

.sd-kicker-meta {
  color: var(--sd-emerald-mid);
  font-weight: 600;
}

.sd-hero-h1 {
  font-family: var(--sd-display);
  font-size: clamp(2.1rem, 4.3vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--sd-emerald-deep);
  margin: 0 0 18px;
}

.sd-hero-lead {
  font-size: clamp(1.04rem, 1.35vw, 1.2rem);
  color: var(--sd-muted);
  max-width: 820px;
  margin: 0 0 26px;
}

.sd-hero-cta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.sd-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--sd-persimmon);
  color: #FFFFFF;
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 15px;
  font-weight: 700;
  padding: 14px 24px;
  border: 2px solid var(--sd-ink);
  box-shadow: 4px 4px 0 var(--sd-emerald-deep);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.sd-btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--sd-emerald-deep);
}

.sd-btn-price-tag {
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  padding: 2px 8px;
  font-size: 12px;
}

.sd-btn-secondary {
  display: inline-flex;
  align-items: center;
  background: var(--sd-paper);
  color: var(--sd-emerald-deep);
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 14px;
  font-weight: 700;
  padding: 14px 20px;
  border: 2px solid var(--sd-border);
}

.sd-btn-secondary:hover {
  background: #E2F0E9;
}

.sd-hero-stat-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sd-stat-chip {
  background: var(--sd-paper);
  border: 1.5px solid var(--sd-border);
  padding: 6px 12px;
  font-family: var(--sd-mono);
  font-size: 12px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.sd-stat-chip strong {
  color: var(--sd-persimmon-dark);
  font-size: 14px;
}

/* Spatial Workbench */
.sd-workbench {
  display: grid;
  grid-template-columns: 420px 1fr;
  background: var(--sd-paper);
  border: 2.5px solid var(--sd-border);
  box-shadow: 8px 8px 0 var(--sd-emerald-deep);
}

.sd-prompt-column {
  border-right: 2px solid var(--sd-border);
  display: flex;
  flex-direction: column;
  background: #F7FBF9;
}

.sd-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  font-family: var(--sd-mono);
  font-size: 12px;
  border-bottom: 2px solid var(--sd-border);
}

.sd-panel-code {
  font-weight: 700;
  color: #99E6C9;
}

.sd-panel-status {
  background: var(--sd-persimmon);
  color: #FFFFFF;
  padding: 2px 7px;
  font-weight: 700;
  font-size: 11px;
}

.sd-prompt-intro {
  margin: 0;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--sd-muted);
  border-bottom: 1.5px dashed var(--sd-grid-line);
}

.sd-clause-list {
  display: flex;
  flex-direction: column;
  padding: 14px;
  gap: 10px;
  flex: 1;
}

.sd-clause-card {
  text-align: left;
  background: var(--sd-paper);
  border: 2px solid #BFD5CA;
  padding: 12px 14px;
  cursor: pointer;
  font-family: var(--sd-sans);
  transition: border-color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}

.sd-clause-card:hover,
.sd-clause-card.is-active {
  border-color: var(--sd-emerald-deep);
  box-shadow: 4px 4px 0 var(--sd-emerald-deep);
  transform: translate(-1px, -1px);
}

.sd-clause-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
  font-family: var(--sd-mono);
  font-size: 11px;
}

.sd-clause-badge {
  font-weight: 700;
  padding: 2px 6px;
  color: #FFFFFF;
}

.sd-color-persimmon { background: var(--sd-persimmon); }
.sd-color-emerald { background: var(--sd-emerald-mid); }
.sd-color-amber { background: var(--sd-amber); }
.sd-color-cobalt { background: var(--sd-cobalt); }

.sd-clause-status {
  color: var(--sd-emerald-mid);
  font-weight: 700;
}

.sd-clause-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--sd-ink);
  margin-bottom: 4px;
}

.sd-clause-meta {
  font-family: var(--sd-mono);
  font-size: 11px;
  color: var(--sd-muted);
}

.sd-prompt-footer {
  padding: 14px 18px;
  border-top: 2px solid var(--sd-border);
  background: #EAF4EF;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sd-prompt-cost-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--sd-mono);
  font-size: 12px;
}

.sd-prompt-run-btn {
  display: block;
  text-align: center;
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 13px;
  font-weight: 700;
  padding: 10px 14px;
  border: 2px solid var(--sd-ink);
}

.sd-prompt-run-btn:hover {
  background: var(--sd-persimmon);
}

/* Right Canvas Column */
.sd-canvas-column {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sd-canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 18px;
  background: #E4F0EA;
  border-bottom: 2px solid var(--sd-border);
  font-family: var(--sd-mono);
  font-size: 12px;
  flex-wrap: wrap;
}

.sd-canvas-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.sd-canvas-mode-pill {
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  padding: 3px 9px;
  font-weight: 700;
}

.sd-pill-muted {
  background: var(--sd-paper);
  color: var(--sd-emerald-deep);
  border: 1px solid var(--sd-border);
}

.sd-canvas-coords-readout {
  color: var(--sd-persimmon-dark);
  font-weight: 700;
}

.sd-canvas-stage {
  position: relative;
  padding: 16px;
  background: #DCECE4;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sd-scene-svg {
  width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--sd-border);
  background: #E6F2EC;
}

.sd-bbox {
  transition: opacity 0.2s ease;
}

.sd-canvas-stage[data-active-clause="1"] .sd-bbox-1,
.sd-canvas-stage[data-active-clause="2"] .sd-bbox-2,
.sd-canvas-stage[data-active-clause="3"] .sd-bbox-3,
.sd-canvas-stage[data-active-clause="4"] .sd-bbox-4 {
  opacity: 1;
}

/* 14 Reference Dock */
.sd-ref-dock {
  padding: 12px 18px;
  background: var(--sd-paper);
  border-top: 2px solid var(--sd-border);
}

.sd-ref-dock-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--sd-mono);
  font-size: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

.sd-ref-dock-title {
  font-weight: 700;
  color: var(--sd-emerald-deep);
}

.sd-ref-dock-badge {
  color: var(--sd-persimmon-dark);
  font-weight: 600;
}

.sd-ref-slots {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 6px;
}

.sd-ref-slot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 30px;
  font-family: var(--sd-mono);
  font-size: 11px;
  font-weight: 700;
  border: 1.5px solid var(--sd-border);
  background: #E8F3EE;
  color: var(--sd-emerald-deep);
}

.sd-ref-slot.is-lite {
  background: #FFEAE2;
  border-color: var(--sd-persimmon);
  color: var(--sd-persimmon-dark);
}

/* Generic Section Styles */
.sd-section {
  padding: 64px 0;
  border-bottom: 2px solid var(--sd-border);
}

.sd-section-head {
  max-width: 780px;
  margin-bottom: 36px;
}

.sd-section-tag {
  display: inline-block;
  font-family: var(--sd-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--sd-persimmon-dark);
  background: #FFEAE2;
  border: 1.5px solid var(--sd-persimmon);
  padding: 3px 10px;
  margin-bottom: 12px;
}

.sd-section-h2 {
  font-family: var(--sd-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  color: var(--sd-emerald-deep);
  margin: 0 0 12px;
  line-height: 1.15;
}

.sd-section-sub {
  font-size: 1.05rem;
  color: var(--sd-muted);
  margin: 0;
}

/* Benefits Grid */
.sd-benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.sd-benefit-card {
  background: var(--sd-paper);
  border: 2px solid var(--sd-border);
  padding: 24px;
  box-shadow: 5px 5px 0 var(--sd-emerald-deep);
  display: flex;
  flex-direction: column;
}

.sd-benefit-coord {
  font-family: var(--sd-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--sd-emerald-mid);
  margin-bottom: 10px;
}

.sd-benefit-h3 {
  font-family: var(--sd-display);
  font-size: 1.3rem;
  margin: 0 0 10px;
  color: var(--sd-emerald-deep);
}

.sd-benefit-p {
  color: var(--sd-muted);
  font-size: 0.96rem;
  margin: 0 0 16px;
  flex: 1;
}

.sd-benefit-proof {
  font-family: var(--sd-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 8px 10px;
  background: #E8F3EE;
  border-left: 3px solid var(--sd-persimmon);
  color: var(--sd-emerald-deep);
}

/* 3 Models Grid */
.sd-models-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.sd-model-card {
  background: var(--sd-paper);
  border: 2px solid var(--sd-border);
  padding: 26px;
  display: flex;
  flex-direction: column;
  box-shadow: 5px 5px 0 var(--sd-emerald-deep);
}

.sd-model-featured {
  border-width: 3px;
  background: #FBFDFC;
  box-shadow: 7px 7px 0 var(--sd-persimmon);
}

.sd-model-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
  font-family: var(--sd-mono);
  font-size: 11px;
}

.sd-model-code {
  color: var(--sd-muted);
  font-weight: 700;
}

.sd-model-flag {
  background: var(--sd-persimmon);
  color: #FFFFFF;
  padding: 2px 8px;
  font-weight: 700;
}

.sd-flag-emerald { background: var(--sd-emerald-mid); }
.sd-flag-amber { background: var(--sd-amber); }

.sd-model-name {
  font-family: var(--sd-display);
  font-size: 1.55rem;
  margin: 0 0 10px;
  color: var(--sd-emerald-deep);
}

.sd-model-price-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1.5px dashed var(--sd-grid-line);
}

.sd-model-price {
  font-family: var(--sd-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--sd-persimmon-dark);
}

.sd-model-prem {
  font-family: var(--sd-mono);
  font-size: 12px;
  color: var(--sd-emerald-mid);
  font-weight: 700;
}

.sd-model-desc {
  font-size: 0.95rem;
  color: var(--sd-muted);
  margin: 0 0 16px;
}

.sd-model-specs {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  flex: 1;
}

.sd-model-specs li {
  font-family: var(--sd-mono);
  font-size: 12px;
  padding: 6px 0;
  border-bottom: 1px solid #DFECE5;
  color: var(--sd-ink);
}

.sd-model-specs li::before {
  content: "[+] ";
  color: var(--sd-persimmon-dark);
  font-weight: 700;
}

.sd-model-btn {
  display: block;
  text-align: center;
  padding: 12px 16px;
  background: var(--sd-persimmon);
  color: #FFFFFF;
  text-decoration: none;
  font-family: var(--sd-mono);
  font-size: 13px;
  font-weight: 700;
  border: 2px solid var(--sd-ink);
}

.sd-model-btn-outline {
  background: var(--sd-emerald-deep);
}

.sd-model-btn:hover {
  background: var(--sd-persimmon-dark);
}

/* Pricing Table */
.sd-table-wrap {
  overflow-x: auto;
  background: var(--sd-paper);
  border: 2px solid var(--sd-border);
  box-shadow: 6px 6px 0 var(--sd-emerald-deep);
}

.sd-price-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.sd-price-table th,
.sd-price-table td {
  padding: 15px 18px;
  text-align: left;
  border-bottom: 1.5px solid #D3E4DC;
}

.sd-price-table th {
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  font-family: var(--sd-mono);
  font-size: 12px;
  text-transform: uppercase;
}

.sd-row-highlight {
  background: #FFF5F0;
}

.sd-price-pill {
  display: inline-block;
  font-family: var(--sd-mono);
  font-weight: 700;
  background: var(--sd-persimmon);
  color: #FFFFFF;
  padding: 2px 9px;
}

/* 3 Steps */
.sd-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.sd-step-box {
  background: var(--sd-paper);
  border: 2px solid var(--sd-border);
  padding: 24px;
  position: relative;
}

.sd-step-num {
  display: inline-block;
  font-family: var(--sd-mono);
  font-size: 14px;
  font-weight: 700;
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  padding: 4px 10px;
  margin-bottom: 12px;
}

.sd-step-h3 {
  font-family: var(--sd-display);
  font-size: 1.25rem;
  margin: 0 0 8px;
  color: var(--sd-emerald-deep);
}

.sd-step-p {
  margin: 0;
  color: var(--sd-muted);
  font-size: 0.95rem;
}

/* FAQ */
.sd-faq-list {
  display: grid;
  gap: 14px;
  max-width: 940px;
}

.sd-faq-item {
  background: var(--sd-paper);
  border: 2px solid var(--sd-border);
  padding: 16px 20px;
}

.sd-faq-q {
  font-family: var(--sd-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--sd-emerald-deep);
  cursor: pointer;
}

.sd-faq-a p {
  margin: 12px 0 0;
  color: var(--sd-muted);
  font-size: 0.96rem;
}

/* Final Banner & Related */
.sd-final-banner {
  background: var(--sd-emerald-deep);
  color: #FFFFFF;
  border: 2.5px solid var(--sd-ink);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: 7px 7px 0 var(--sd-persimmon);
  margin-bottom: 28px;
}

.sd-final-h2 {
  font-family: var(--sd-display);
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin: 8px 0;
}

.sd-final-p {
  margin: 0;
  color: #CBE4D9;
  max-width: 620px;
}

.sd-related-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--sd-mono);
  font-size: 13px;
}

.sd-related-label {
  font-weight: 700;
  color: var(--sd-emerald-deep);
}

.sd-related-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sd-related-pill {
  text-decoration: none;
  color: var(--sd-emerald-deep);
  background: var(--sd-paper);
  border: 1.5px solid var(--sd-border);
  padding: 6px 12px;
  font-weight: 600;
}

.sd-related-pill:hover {
  background: var(--sd-persimmon);
  color: #FFFFFF;
}

/* Footer */
.sd-footer {
  padding: 28px 0;
  background: #E5EFEA;
  font-family: var(--sd-mono);
  font-size: 13px;
}

.sd-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.sd-footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sd-footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.sd-footer-links a {
  color: var(--sd-emerald-deep);
  text-decoration: none;
  font-weight: 600;
}

@media (max-width: 980px) {
  .sd-workbench {
    grid-template-columns: 1fr;
  }
  .sd-prompt-column {
    border-right: none;
    border-bottom: 2px solid var(--sd-border);
  }
  .sd-benefits-grid,
  .sd-models-grid,
  .sd-steps-grid {
    grid-template-columns: 1fr;
  }
  .sd-ref-slots {
    grid-template-columns: repeat(7, 1fr);
  }
}