/* ── Sales Page — Mobile-First ────────────────────────────── */

/* Nav additions */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  width: 36px;
  height: 36px;
}
.nav-hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-end {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ── HERO ───────────────────────────────────────────────── */
.sp-hero {
  min-height: calc(100svh - 56px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3rem;
  padding: 4rem 1.5rem 3rem;
  position: relative;
  overflow: hidden;
}

.sp-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,255,136,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.sp-hero-inner {
  max-width: 640px;
}

.sp-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.sp-h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  color: #fff;
}

.sp-accent {
  color: var(--accent);
}

.sp-hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.75rem;
  max-width: 560px;
}

.sp-hero-pulse {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(0,255,136,0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.78rem;
  color: var(--accent-dim);
  margin-bottom: 2rem;
}

.sp-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0,255,136,0.8);
  animation: nav-pulse 777ms ease-in-out infinite;
  flex-shrink: 0;
}

.sp-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sp-btn-primary {
  display: inline-flex;
  align-items: center;
  background: var(--accent);
  color: #000;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: opacity 0.15s, transform 0.15s;
  white-space: nowrap;
}
.sp-btn-primary:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }

.sp-btn-secondary {
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-dim);
  text-decoration: none;
  transition: border-color 0.15s;
}
.sp-btn-secondary:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* Hero code block */
.sp-hero-code {
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 100%;
}

.sp-code-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border-dim);
}

.sp-code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.sp-code-dot.red   { background: #ff5f57; }
.sp-code-dot.amber { background: #ffbd2e; }
.sp-code-dot.green { background: #28c840; }

.sp-code-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.sp-code-block {
  margin: 0;
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  color: var(--text);
}

.sp-c-comment { color: #5c6e6e; }
.sp-c-kw      { color: #00d4ff; }
.sp-c-str     { color: var(--accent); }
.sp-c-num     { color: #ffd700; }

/* ── TRUST BAR ───────────────────────────────────────────── */
.sp-trust {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  padding: 1.25rem 1.5rem;
}

.sp-trust-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
}

.sp-trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.sp-trust-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.sp-trust-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sp-trust-div {
  width: 1px;
  height: 2rem;
  background: var(--border-dim);
}

a.sp-trust-item.sp-trust-zenodo {
  text-decoration: none;
  color: inherit;
  opacity: 0.85;
  transition: opacity 0.15s;
}
a.sp-trust-item.sp-trust-zenodo:hover {
  opacity: 1;
}
a.sp-trust-item.sp-trust-zenodo .sp-trust-label {
  color: var(--accent);
}

/* ── SHARED SECTION STYLES ───────────────────────────────── */
.sp-section {
  padding: 5rem 1.5rem;
}

.sp-container {
  max-width: 1100px;
  margin: 0 auto;
}

.sp-section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.sp-h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 1.25rem;
}

.sp-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 2.5rem;
}

/* ── PROBLEM ─────────────────────────────────────────────── */
.sp-problem {
  background: var(--bg-surface);
}

.sp-pain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.sp-pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.sp-pain-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #fff;
}

.sp-pain-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.sp-pain-icon {
  font-size: 1.25rem;
  color: #ff5f57;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
}

/* ── SOLUTION ────────────────────────────────────────────── */
.sp-formula-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 2.5rem;
  overflow-x: auto;
}

.sp-formula-label {
  font-size: 0.72rem;
  color: var(--accent-dim);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.sp-formula {
  font-size: clamp(0.85rem, 2.5vw, 1.1rem);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1.25rem;
  white-space: nowrap;
  overflow-x: auto;
}

.sp-formula-explain {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
}

.sp-formula-explain span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.sp-formula-explain strong {
  color: var(--accent);
  font-family: var(--font-mono);
}

.sp-solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.sp-solution-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sp-solution-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.sp-solution-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── HOW IT WORKS ────────────────────────────────────────── */
.sp-steps {
  background: var(--bg-surface);
}

.sp-steps-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.sp-step {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  flex: 1;
}

.sp-step-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.sp-step h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}

.sp-step p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.sp-step-arrow {
  display: none;
  align-self: center;
  color: var(--accent);
  font-size: 1.5rem;
  font-family: var(--font-mono);
}

.sp-inline-code {
  background: rgba(0,255,136,0.1);
  color: var(--accent);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-size: 0.85em;
}

/* Code demo tabs */
.sp-code-demo {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  overflow: hidden;
}

.sp-code-demo-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-dim);
  overflow-x: auto;
}

.sp-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.sp-tab:hover { color: var(--text); }
.sp-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.sp-tab-content { display: none; }
.sp-tab-content.active { display: block; }

/* ── FEATURES ────────────────────────────────────────────── */
.sp-features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.sp-feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.sp-feature-card:hover {
  border-color: var(--border);
}

.sp-feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.sp-feature-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}

.sp-feature-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── COMPARISON ──────────────────────────────────────────── */
.sp-compare {
  background: var(--bg-surface);
}

.sp-compare-table {
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  overflow: hidden;
  overflow-x: auto;
}

.sp-compare-header,
.sp-compare-row {
  display: grid;
  grid-template-columns: minmax(160px, 2fr) repeat(4, minmax(90px, 1fr));
  align-items: center;
}

.sp-compare-header {
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border-dim);
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.sp-compare-col-label.zeq {
  color: var(--accent);
}

.sp-compare-row {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.sp-compare-row:last-child { border-bottom: none; }

.sp-compare-row .zeq {
  color: var(--accent);
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.sp-compare-feature {
  color: var(--text);
  font-weight: 500;
}

.sp-compare-muted {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ── PRICING ─────────────────────────────────────────────── */
.sp-pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.sp-price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.75rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sp-price-card--featured {
  border-color: var(--accent);
  box-shadow: 0 0 32px rgba(0,255,136,0.12);
}

.sp-price-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.85rem;
  border-radius: 999px;
  white-space: nowrap;
}

.sp-price-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

.sp-price-amount {
  font-size: 2.25rem;
  font-weight: 900;
  color: #fff;
  line-height: 1;
}

.sp-price-amount span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.sp-price-trial {
  font-size: 0.8rem;
  color: var(--accent-dim);
  font-family: var(--font-mono);
  min-height: 1.2em;
}

.sp-price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.sp-price-features li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 1.2rem;
  position: relative;
}

.sp-price-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.sp-btn-price {
  display: block;
  text-align: center;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--bg-surface);
  color: var(--text);
  border: 1px solid var(--border-dim);
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
  margin-top: auto;
}

.sp-btn-price:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.sp-btn-price--featured {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.sp-btn-price--featured:hover { opacity: 0.88; color: #000; border-color: var(--accent); }

.sp-pricing-footnote {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ── WAITLIST ────────────────────────────────────────────── */
.sp-waitlist {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-dim);
}

.sp-waitlist-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.sp-waitlist-h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
}

.sp-waitlist-text p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.sp-waitlist-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.sp-waitlist-stats strong {
  color: var(--accent);
  font-family: var(--font-mono);
}

.sp-waitlist-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sp-waitlist-form input {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}

.sp-waitlist-form input:focus { border-color: var(--accent); }

.sp-waitlist-form button {
  background: var(--accent);
  color: #000;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 1.5rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.15s;
  width: 100%;
}

.sp-waitlist-form button:hover { opacity: 0.85; }
.sp-waitlist-form button:disabled { opacity: 0.5; cursor: not-allowed; }

.sp-waitlist-msg {
  font-size: 0.88rem;
  min-height: 1.2em;
  padding: 0.1rem 0;
}

.sp-waitlist-msg.success { color: var(--accent); }
.sp-waitlist-msg.error   { color: #ff5f57; }

.sp-waitlist-note {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ── FOOTER ──────────────────────────────────────────────── */
.sp-footer {
  background: var(--bg);
  border-top: 1px solid var(--border-dim);
  padding: 3.5rem 1.5rem 1.5rem;
}

.sp-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.sp-footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.sp-footer-zeqond {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
}

.sp-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.sp-footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 130px;
}

.sp-footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
  font-family: var(--font-mono);
}

.sp-footer-col a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
}

.sp-footer-col a:hover { color: var(--accent); }

.sp-footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  border-top: 1px solid var(--border-dim);
  padding-top: 1.25rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* ── RESPONSIVE — TABLET (640px+) ───────────────────────── */
@media (min-width: 640px) {
  .sp-pain-grid         { grid-template-columns: repeat(2, 1fr); }
  .sp-features-grid     { grid-template-columns: repeat(2, 1fr); }
  .sp-waitlist-form     { flex-direction: row; }
  .sp-waitlist-form input { flex: 1; }
  .sp-waitlist-form button { width: auto; white-space: nowrap; }
  .sp-solution-grid     { grid-template-columns: repeat(3, 1fr); }
}

/* ── RESPONSIVE — DESKTOP (900px+) ─────────────────────── */
@media (min-width: 900px) {
  .sp-hero {
    flex-direction: row;
    align-items: center;
    padding: 5rem 4rem;
    gap: 4rem;
  }

  .sp-hero-inner { flex: 1; max-width: 560px; }
  .sp-hero-code  { flex: 1; max-width: 500px; }

  .sp-pain-grid         { grid-template-columns: repeat(3, 1fr); }
  .sp-features-grid     { grid-template-columns: repeat(3, 1fr); }
  .sp-pricing-grid      { grid-template-columns: repeat(4, 1fr); }
  .sp-steps-grid        { flex-direction: row; align-items: flex-start; }
  .sp-step-arrow        { display: flex; padding-top: 2.5rem; }
  .sp-waitlist-inner    { flex-direction: row; align-items: flex-start; }
  .sp-waitlist-text     { flex: 1; max-width: 480px; }
  .sp-waitlist-form-wrap { flex: 1; max-width: 400px; }
  .sp-footer-inner      { flex-direction: row; justify-content: space-between; }
  .sp-footer-brand      { max-width: 280px; }
  .sp-footer-links      { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.5rem; flex: 1; }
  .sp-footer-links .sp-footer-col { min-width: 0; }

  .nav-hamburger { display: none !important; }
  .nav-links     { display: flex !important; }
}

/* ── HERO QUOTE ─────────────────────────────────────────── */
.sp-hero-quote {
  font-style: italic;
  font-size: clamp(0.9rem, 2vw, 1rem);
  color: var(--text-muted);
  border-left: 2px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 0 0 1.75rem;
  max-width: 520px;
}

/* ── 64 DOMAINS ─────────────────────────────────────────── */
.sp-domain-groups {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2.5rem;
}

.sp-domain-group {
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: var(--bg-card);
}

.sp-domain-group-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.sp-domain-group-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sp-domain-group-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: rgba(255,255,255,0.05);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--border-dim);
}

.sp-domain-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.sp-pill {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-dim);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  transition: background 0.15s, color 0.15s;
}

.sp-pill:hover {
  background: rgba(255,255,255,0.07);
  color: var(--text);
}

/* ── OPERATOR FAMILIES ──────────────────────────────────── */
.sp-opfamily-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 2.5rem;
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  overflow: hidden;
}

.sp-opfamily-col {
  display: flex;
  flex-direction: column;
}

.sp-opfamily-item {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-dim);
  background: var(--bg-card);
  transition: background 0.15s;
}

.sp-opfamily-item:last-child {
  border-bottom: none;
}

.sp-opfamily-item:hover {
  background: rgba(255,255,255,0.03);
}

.sp-opfamily-item--zeq {
  background: rgba(0,255,136,0.03);
}

.sp-opfamily-item--zeq:hover {
  background: rgba(0,255,136,0.06);
}

.sp-opfamily-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.35rem;
}

.sp-opfamily-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ── GENERATIVE MATH ────────────────────────────────────── */
.sp-genmath .sp-lead {
  max-width: 720px;
}

@media (min-width: 900px) {
  .sp-opfamily-grid {
    grid-template-columns: 1fr 1fr;
  }
  .sp-opfamily-col:first-child .sp-opfamily-item {
    border-right: 1px solid var(--border-dim);
  }
  .sp-opfamily-col:first-child .sp-opfamily-item:last-child {
    border-bottom: 1px solid var(--border-dim);
  }
}

/* ── ORIGIN ─────────────────────────────────────────────── */
.sp-origin {
  border-top: 1px solid var(--border-dim);
}

.sp-origin-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 720px;
}

.sp-origin-text a {
  color: var(--accent);
  text-decoration: none;
}

.sp-origin-text a:hover {
  text-decoration: underline;
}

/* ── MOBILE NAV ─────────────────────────────────────────── */
@media (max-width: 899px) {
  .nav-hamburger { display: flex; }
  .nav-zeqond    { display: none; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-dim);
    padding: 1rem 1.5rem;
    gap: 0;
    z-index: 99;
    list-style: none;
  }

  .nav-links.nav-links--open { display: flex; }

  .nav-links li { border-bottom: 1px solid var(--border-dim); }
  .nav-links li:last-child { border-bottom: none; }
  .nav-links a {
    display: block;
    padding: 0.9rem 0;
    color: var(--text);
    font-size: 1rem;
    text-decoration: none;
  }
}

/* ── WHAT YOU CAN BUILD ─────────────────────────────────────── */
.sp-builds { background: var(--bg); }

.sp-builds-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.sp-build-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  border-top: 3px solid var(--border-dim);
  transition: border-color 0.2s, transform 0.2s;
}
.sp-build-card:hover { transform: translateY(-2px); }

.sp-build-healthcare  { border-top-color: #00d4ff; }
.sp-build-aerospace   { border-top-color: #00ff88; }
.sp-build-aiml        { border-top-color: #b44fff; }
.sp-build-finance     { border-top-color: #ffd700; }
.sp-build-quantum     { border-top-color: #ff6b35; }
.sp-build-enviro      { border-top-color: #4ade80; }

.sp-build-domain {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.sp-build-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}
.sp-build-barrier {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #ff6b35;
  opacity: 0.85;
  margin-bottom: 0.65rem;
  padding: 0.3rem 0.6rem;
  background: rgba(255, 107, 53, 0.06);
  border-radius: 4px;
  display: inline-block;
}
.sp-build-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.sp-builds-note {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.7;
}
.sp-builds-note a { color: var(--accent); text-decoration: none; }
.sp-builds-note a:hover { text-decoration: underline; }

@media (min-width: 640px) {
  .sp-builds-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
  .sp-builds-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── PLATFORM AGNOSTIC ──────────────────────────────────────── */
.sp-platforms { background: var(--bg-card); }

.sp-platforms-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.sp-platform-card {
  background: var(--bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  transition: border-color 0.2s;
}
.sp-platform-card:hover { border-color: var(--accent); }

.sp-platform-featured {
  border-color: rgba(0, 255, 136, 0.35);
  background: rgba(0, 255, 136, 0.03);
}

.sp-platform-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.sp-platform-featured .sp-platform-name { color: var(--accent); }

.sp-platform-how {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  opacity: 0.75;
  margin-bottom: 0.5rem;
}
.sp-platform-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.sp-platforms-snippet {
  margin-top: 2rem;
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  overflow: hidden;
}

.sp-inline-code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent);
  background: rgba(0, 255, 136, 0.07);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

@media (min-width: 600px) {
  .sp-platforms-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .sp-platforms-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── EXPANDED ORIGIN ────────────────────────────────────────── */
.sp-origin { background: var(--bg); }

.sp-origin-story {
  max-width: 760px;
}

.sp-origin-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}
.sp-origin-text strong { color: var(--text); }
.sp-origin-text a { color: var(--accent); text-decoration: none; }
.sp-origin-text a:hover { text-decoration: underline; }

.sp-origin-paper {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
}
.sp-origin-paper-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
  margin-bottom: 0.5rem;
}
.sp-origin-paper-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.sp-origin-paper-authors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.sp-origin-paper-meta {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.sp-origin-doi {
  color: var(--accent);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.sp-origin-doi:hover { text-decoration: underline; }

/* ── THE PHYSICS CHAIN ──────────────────────────────────────── */
.sp-chain { background: var(--bg-card); }

.sp-chain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.sp-chain-link {
  background: var(--bg);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
}

.sp-chain-eq {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 0.3rem;
  letter-spacing: 0.05em;
}

.sp-chain-name {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.sp-chain-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  opacity: 0.4;
  margin: 0.5rem 0;
  line-height: 1;
}

.sp-chain-note {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-top: 0.75rem;
  text-align: left;
  border-top: 1px solid var(--border-dim);
  padding-top: 0.75rem;
}

.sp-chain-conclusion {
  margin-top: 2.5rem;
  max-width: 760px;
  padding: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border-dim);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
}

.sp-chain-conclusion p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0 0 1rem;
}
.sp-chain-conclusion p:last-child { margin-bottom: 0; }
.sp-chain-conclusion strong { color: var(--text); }

@media (min-width: 800px) {
  .sp-chain-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── Origin Timeline ──────────────────────────────────────── */
.sp-origin-timeline {
  margin: 2.5rem 0 2rem;
  position: relative;
  padding-left: 1.5rem;
}

.sp-origin-timeline::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--accent);
  opacity: 0.25;
}

.sp-origin-tl-item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 2rem;
  position: relative;
}

.sp-origin-tl-item:last-child { margin-bottom: 0; }

.sp-origin-tl-dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 0.35rem;
  position: relative;
  left: -1.075rem;
  box-shadow: 0 0 8px var(--accent);
}

.sp-origin-tl-body {
  padding-left: 0;
}

.sp-origin-tl-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
  opacity: 0.85;
}

.sp-origin-tl-text {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.sp-origin-paper-authors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-style: italic;
}

.sp-origin-quote-aside {
  border-left: 2px solid var(--border-dim);
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.875rem;
}

.sp-origin-humble {
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 600;
}

.sp-origin-blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.5rem 0;
  padding: 0.75rem 1.5rem;
  font-size: 1.1rem;
  font-style: italic;
  color: var(--text);
  background: rgba(0,255,136,0.03);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sp-origin-sig {
  font-size: 0.925rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* ── PARADIGM CALLOUT ────────────────────────────────────── */
.sp-paradigm-callout {
  background: rgba(0,255,136,0.03);
  border-top: 1px solid rgba(0,255,136,0.15);
  border-bottom: 1px solid rgba(0,255,136,0.15);
  padding: 2rem 1.5rem;
}
.sp-paradigm-inner {
  max-width: 800px;
  margin: 0 auto;
}
.sp-paradigm-line {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 0.65rem;
  font-weight: 600;
}
.sp-paradigm-line strong { color: var(--accent); }
.sp-paradigm-sub {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.7;
}
.sp-paradigm-sub strong { color: var(--text); }

/* ── OPERATOR TIERS ──────────────────────────────────────── */
.sp-operators {
  background: var(--bg-surface);
}
.sp-tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.sp-tier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  border-top: 3px solid var(--border-dim);
}
.sp-tier-card--exp {
  border-top-color: #b44fff;
}
.sp-tier-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.85rem;
}
.sp-tier-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.sp-tier-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}
.sp-tier-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-left: auto;
}
.sp-tier-badge--flagship {
  background: rgba(0,255,136,0.12);
  color: var(--accent);
  border: 1px solid rgba(0,255,136,0.25);
}
.sp-tier-badge--prod {
  background: rgba(0,212,255,0.1);
  color: #00d4ff;
  border: 1px solid rgba(0,212,255,0.2);
}
.sp-tier-badge--grow {
  background: rgba(255,215,0,0.1);
  color: #ffd700;
  border: 1px solid rgba(255,215,0,0.2);
}
.sp-tier-badge--exp {
  background: rgba(180,79,255,0.12);
  color: #b44fff;
  border: 1px solid rgba(180,79,255,0.25);
}
.sp-tier-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
  max-width: 640px;
}
.sp-tier-families {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.sp-tier-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.75rem;
}
.sp-tier-pill--ko {
  color: var(--accent);
  border-color: rgba(0,255,136,0.25);
  background: rgba(0,255,136,0.06);
}
.sp-tier-pill--exp {
  color: #b44fff;
  border-color: rgba(180,79,255,0.2);
  background: rgba(180,79,255,0.05);
}
.sp-tier-pill-count {
  font-weight: 400;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.sp-tier-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}
@media (min-width: 640px) {
  .sp-tier-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .sp-tier-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── SUPPORTED INDUSTRIES ────────────────────────────────── */
.sp-industries {
  background: var(--bg);
}
.sp-industry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}
.sp-industry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: border-color 0.2s;
}
.sp-industry-card:hover {
  border-color: var(--border);
}
.sp-industry-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
}
.sp-industry-uses {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.sp-industry-uses li {
  font-size: 0.83rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
  line-height: 1.5;
}
.sp-industry-uses li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  opacity: 0.7;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
@media (min-width: 640px) {
  .sp-industry-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .sp-industry-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1100px) {
  .sp-industry-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ── Zeqond Temporal Section ────────────────────────────────── */
.sp-zeqond-section { background: var(--bg); border-top: 1px solid rgba(0,255,136,0.07); }

.sp-zeqond-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2.5rem 0;
}
@media (min-width: 640px) { .sp-zeqond-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .sp-zeqond-grid { grid-template-columns: repeat(4, 1fr); } }

.sp-zeqond-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.sp-zeqond-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0.75rem 0 0.5rem;
}
.sp-zeqond-card p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
  line-height: 1.65;
}
.sp-zeqond-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.sp-zeqond-card--live {
  border-color: rgba(0,255,136,0.35);
  background: rgba(0,255,136,0.03);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.sp-zeqond-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  opacity: 0.75;
}
.sp-zeqond-count {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -0.02em;
}
.sp-zeqond-sub {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
}

.sp-zeqond-equation {
  background: var(--card);
  border: 1px solid rgba(0,255,136,0.15);
  border-radius: 10px;
  padding: 1.5rem 2rem;
  text-align: center;
}
.sp-zeqond-equation .sp-formula {
  font-size: 1rem;
  color: var(--accent);
  margin: 0.5rem 0;
}
.sp-zeqond-eq-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

/* ── Gamedev / Digital Twins card accent ───────────────────── */
.sp-build-gamedev { border-top-color: #a855f7; }
.sp-build-gamedev .sp-build-domain { color: #a855f7; }

/* ── Revolutionary Technology section ──────────────────────── */
.sp-revtech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0 2rem;
}

.sp-revtech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
}

.sp-revtech-card:hover {
  border-color: rgba(0, 255, 136, 0.35);
  transform: translateY(-2px);
}

.sp-revtech-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 0.85rem;
  line-height: 1;
  opacity: 0.85;
}

.sp-revtech-heading {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.65rem;
  letter-spacing: -0.01em;
}

.sp-revtech-body {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.sp-revtech-ctas {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.sp-revtech-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.9;
  transition: opacity 0.2s;
}

.sp-revtech-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* Task 61 — 8-act narrative redesign */

/* ── ACT 2: THE PROBLEM ─────────────────────────────────── */
.sp-act-problem {
  background: var(--bg-surface);
}

.sp-problem-statements {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 3rem;
}

.sp-problem-statement {
  display: flex;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  align-items: flex-start;
}

.sp-problem-statement:first-child {
  padding-top: 1rem;
}

.sp-problem-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  opacity: 0.5;
  flex-shrink: 0;
  padding-top: 0.25rem;
  min-width: 2rem;
}

.sp-problem-text {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text);
  line-height: 1.7;
  font-weight: 400;
  max-width: 800px;
}

.sp-problem-close {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
  padding-top: 1rem;
}

/* ── ACT 3: THE DISCOVERY ───────────────────────────────── */
.sp-act-discovery {
  background: var(--bg);
}

.sp-discovery-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

@media (min-width: 900px) {
  .sp-discovery-layout {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
  }
}

.sp-discovery-story {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.sp-discovery-text {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.sp-discovery-text strong {
  color: var(--text);
  font-weight: 700;
}

.sp-accent-text {
  color: var(--accent);
  font-weight: 700;
}

.sp-discovery-pull {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: sticky;
  top: 5rem;
}

.sp-discovery-quote {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  border-left: 3px solid var(--accent);
  padding-left: 1.5rem;
  font-style: normal;
  letter-spacing: -0.01em;
}

.sp-discovery-quote-attr {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  opacity: 0.7;
  padding-left: 1.5rem;
}

.sp-discovery-paper {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.sp-discovery-paper-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

.sp-discovery-paper-title {
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.sp-discovery-doi {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.9;
}

.sp-discovery-doi:hover {
  opacity: 1;
  text-decoration: underline;
}

.sp-discovery-paper-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* ── ACT 4: THE SYSTEM ──────────────────────────────────── */
.sp-act-system {
  background: var(--bg-surface);
}

.sp-system-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-top: 2.5rem;
  align-items: start;
}

@media (min-width: 900px) {
  .sp-system-layout {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.sp-system-code-panel {
  max-width: 100%;
}

.sp-system-right {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ── ACT 5: THE PROOF FRAMING ───────────────────────────── */
.sp-act-proof-frame {
  padding: 4rem 1.5rem 2rem;
}

.sp-act-proof-frame .sp-container {
  max-width: 1100px;
  margin: 0 auto;
}

/* ── ACT 6: PERSONAS / WHO BENEFITS ────────────────────── */
.sp-act-personas {
  background: var(--bg);
}

.sp-build-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

@media (min-width: 640px) {
  .sp-build-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .sp-build-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sp-build-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.2s, transform 0.2s;
}

.sp-build-card:hover {
  border-color: rgba(0, 255, 136, 0.25);
  transform: translateY(-2px);
}

.sp-build-domain {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.75;
}

.sp-build-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.sp-build-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.sp-build-cta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.85;
  margin-top: 0.25rem;
}

.sp-build-cta:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ── ACT 7: CLOSING LINE ────────────────────────────────── */
.sp-act7-close {
  text-align: center;
  padding: 3rem 1.5rem 2.5rem;
  position: relative;
  z-index: 1;
}

.sp-act7-close-text {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.5;
  letter-spacing: -0.01em;
  font-style: italic;
}

/* ── ACT 8: WHAT THIS UNLOCKS ───────────────────────────── */
.sp-act-unlocks {
  background: var(--bg-surface);
}

.sp-unlocks-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

@media (min-width: 640px) {
  .sp-unlocks-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .sp-unlocks-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sp-unlock-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s;
}

.sp-unlock-card:hover {
  border-color: rgba(0, 255, 136, 0.2);
}

.sp-unlock-icon {
  font-size: 1.5rem;
  color: var(--accent);
  opacity: 0.65;
  line-height: 1;
  font-family: var(--font-mono);
}

.sp-unlock-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}

.sp-unlock-body {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}

.sp-unlocks-footer {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-dim);
}


/* ── ACT 6: PERSONA LINES ───────────────────────────────── */
.sp-persona-lines {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  padding: 1.25rem 1.5rem;
  background: rgba(0, 255, 136, 0.03);
  border-left: 3px solid rgba(0, 255, 136, 0.3);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sp-persona-line {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.sp-persona-line strong {
  color: var(--text);
  font-weight: 700;
}

/* ── ACT 8: UNLOCKS CLOSE LINE ──────────────────────────── */
.sp-unlocks-close {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  text-align: center;
}

/* ── PULL QUOTES ─────────────────────────────────────────── */
.sp-pull-quote {
  position: relative;
  margin: 2rem 0 2rem;
  padding: 1.5rem 1.75rem;
  background: rgba(0, 255, 136, 0.03);
  border-left: 3px solid rgba(0, 255, 136, 0.4);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.sp-pull-quote p {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-style: italic;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  margin: 0 0 0.6rem;
}

.sp-pull-quote cite {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  font-style: normal;
  opacity: 0.8;
  letter-spacing: 0.04em;
}

.sp-pull-quote--wide {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  border-left: none;
  border: 1px solid rgba(0, 255, 136, 0.12);
  border-radius: var(--radius);
  background: rgba(0, 255, 136, 0.025);
  text-align: center;
  padding: 2rem 2.5rem;
}

/* ── SVG EQUATION BLOCKS ─────────────────────────────────── */
.sp-svg-eq-block {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.sp-svg-eq-block--center {
  text-align: center;
  max-width: 640px;
}

.sp-svg-eq-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  opacity: 0.6;
}

.sp-svg-eq {
  display: block;
  width: 100%;
  max-width: 460px;
  height: auto;
  overflow: visible;
}

.sp-svg-eq--wide {
  max-width: 100%;
}

/* ── ARCHITECTURE EXPLAIN ────────────────────────────────── */
.sp-arch-explain {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 0 0 2.5rem;
}

@media (min-width: 720px) {
  .sp-arch-explain {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sp-arch-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.sp-arch-term {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 0.65rem;
}

.sp-arch-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

/* ── SYSTEM CLOSE LINE ───────────────────────────────────── */
.sp-system-close {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: rgba(255, 255, 255, 0.4);
  font-style: italic;
  text-align: center;
  margin-top: 2.5rem;
  letter-spacing: 0.02em;
}

/* ── DISCOVERY CLOSE LINE ────────────────────────────────── */
.sp-discovery-close-line {
  font-style: italic;
  color: rgba(255, 255, 255, 0.55);
}

/* ── ECOSYSTEM SECTION ───────────────────────────────────── */
.sp-ecosystem {
  background: rgba(0, 0, 0, 0.2);
}

.sp-ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}

@media (min-width: 540px) {
  .sp-ecosystem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .sp-ecosystem-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.sp-ecosystem-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
}

.sp-ecosystem-tile:hover {
  border-color: rgba(0, 255, 136, 0.3);
  background: rgba(0, 255, 136, 0.03);
}

.sp-ecosystem-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
}

.sp-ecosystem-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.3;
}

.sp-ecosystem-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-dim);
  text-align: center;
}

.sp-ecosystem-cta-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 500px;
  margin: 0;
}

/* ── VIDEO HERO BACKGROUND ──────────────────────────────── */
.sp-hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  z-index: 1;   /* above galaxy canvas (z-index 0) */
  opacity: 0;
  transition: opacity 1s ease;
}

/* class added by JS when video can actually play */
.sp-hero-video--playing {
  opacity: 0.35;
}

/* ── LIVE BANNER ─────────────────────────────────────────── */
.sp-live-banner {
  text-align: center;
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
  background: rgba(0, 255, 136, 0.02);
}

.sp-live-banner-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.sp-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(0, 255, 136, 0.03);
  border: 1px solid rgba(0, 255, 136, 0.20);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sp-live-cta {
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
}