/* ─── Orbit Sales marketing site ────────────────────────────────────────
   Single hand-written stylesheet. Scoped under .os-home where it matters.
   Tokens via CSS variables. No preprocessor, no utility framework.
   ───────────────────────────────────────────────────────────────────── */

.os-home {
  --os-ink: #0a0a0f;
  --os-body: #3d3552;
  --os-muted: #7a7290;
  --os-line: #ebe4f5;
  --os-line-strong: #cbbaee;
  --os-paper: #faf7ff;
  --os-surface: #ffffff;
  --os-accent: #7c3aed;
  --os-accent-dark: #5b21b6;
  --os-accent-tint: #f3edff;
  --os-dark: #1a0e2e;
  --os-dark-soft: #2a1e44;

  --os-peach: #faf5ff;   --os-peach-line: #e9d8fd;
  --os-mint:  #f3e8ff;   --os-mint-line:  #d8b4fe;
  --os-sky:   #eef2ff;   --os-sky-line:   #c7d2fe;
  --os-lilac: #e0e7ff;   --os-lilac-line: #a5b4fc;
  --os-sand:  #ede9fe;   --os-sand-line:  #c4b5fd;

  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--os-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background: var(--os-paper);
  margin: 0;
}

.os-home * { box-sizing: border-box; }

.os-home h1, .os-home h2, .os-home h3, .os-home h4,
.os-home p, .os-home ul, .os-home ol { margin: 0; }

.os-home a { color: inherit; text-decoration: none; }
.os-home a:focus-visible { outline: 2px solid var(--os-accent); outline-offset: 2px; border-radius: 4px; }

.os-container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.os-inline-link { color: var(--os-accent); font-weight: 600; }

/* ─── Sticky nav (§5.1) ───────────────────────────────────────────── */
.os-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,247,255,0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--os-line);
}
.os-nav-inner {
  max-width: 1120px; margin: 0 auto;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.85rem 24px;
}
.os-brand {
  font-weight: 700; color: var(--os-ink);
  letter-spacing: -0.01em; font-size: 1.05rem;
  display: inline-flex; align-items: center; gap: 0.55rem;
}
.os-brand img {
  width: 32px; height: 32px; display: block;
  border-radius: 6px;
}
.os-nav-links {
  display: flex; gap: 1.4rem;
  font-size: 0.95rem; flex: 1;
  margin-left: 1.25rem;
}
.os-nav-links a { color: var(--os-ink); font-weight: 500; }
.os-nav-links a:hover { color: var(--os-accent); }
.os-nav-cta { display: flex; align-items: center; gap: 0.85rem; }
.os-nav-login { color: var(--os-ink); font-weight: 500; font-size: 0.95rem; }
.os-nav-login:hover { color: var(--os-accent); }

.os-nav-lang { display: inline-flex; align-items: center; gap: 0.15rem; margin-right: 0.85rem; }
.os-nav-lang-link {
  color: var(--os-ink);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  text-decoration: none;
  line-height: 1;
}
.os-nav-lang-link:hover { color: var(--os-accent); background: rgba(124,58,237,0.06); }
.os-nav-lang-link.is-active {
  color: #fff;
  background: var(--os-accent);
  font-weight: 600;
}
.os-nav-lang-link.is-active:hover { background: var(--os-accent); }

/* ─── Hero ────────────────────────────────────────────────────────── */
.os-hero {
  background: radial-gradient(1200px 600px at 15% -10%, #e9d8fd 0%, transparent 55%),
              radial-gradient(900px 500px at 95% 10%, #c7d2fe 0%, transparent 55%),
              var(--os-paper);
  padding: 5.5rem 0 5rem;
  border-bottom: 1px solid var(--os-line);
}
.os-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--os-accent-dark);
  background: var(--os-accent-tint); border: 1px solid var(--os-line-strong);
  padding: 0.35rem 0.75rem; border-radius: 999px;
}
.os-eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--os-accent);
}
.os-hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  line-height: 1.04; letter-spacing: -0.025em;
  color: var(--os-ink); font-weight: 700;
  margin: 1.25rem 0 1.25rem; max-width: 900px;
}
.os-hero h1 em {
  font-style: normal; color: var(--os-accent);
  background: linear-gradient(180deg, transparent 62%, #d8b4fe 62%);
}
.os-hero-sub {
  font-size: clamp(1.05rem, 1.35vw, 1.2rem);
  line-height: 1.55; max-width: 680px; color: var(--os-body);
}
.os-cta-row {
  display: flex; flex-wrap: wrap; gap: 0.75rem;
  margin-top: 2rem;
}
.os-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.85rem 1.4rem; border-radius: 10px;
  font-weight: 600; font-size: 0.98rem;
  border: 1px solid transparent; transition: transform .08s ease, background .15s ease;
  white-space: nowrap; cursor: pointer;
}
.os-btn-sm { padding: 0.55rem 0.95rem; font-size: 0.9rem; border-radius: 8px; }
.os-btn:active { transform: translateY(1px); }
.os-home .os-btn-primary { background: var(--os-accent); color: #fff; }
.os-home .os-btn-primary:hover { background: var(--os-accent-dark); color: #fff; }
.os-home .os-btn-ghost {
  background: var(--os-surface); color: var(--os-ink);
  border-color: var(--os-line-strong);
}
.os-home .os-btn-ghost:hover { border-color: var(--os-ink); }
.os-btn-arrow::after { content: "→"; font-weight: 500; }

.os-hero-meta {
  display: flex; flex-direction: column; gap: 0.5rem;
  margin-top: 1.75rem;
  font-size: 0.88rem; color: var(--os-muted);
}
.os-hero-meta span { display: inline-flex; align-items: center; gap: 0.4rem; }
.os-hero-meta span::before {
  content: ""; width: 6px; height: 6px; background: var(--os-accent); border-radius: 50%;
}
.os-hero-meta a { border-bottom: 1px solid var(--os-line-strong); padding-bottom: 1px; }
.os-hero-meta a:hover { border-bottom-color: var(--os-accent); color: var(--os-accent); }

/* ─── Triple denial / positioning (§5.4) ──────────────────────────── */
.os-positioning {
  background: var(--os-surface);
  padding: 3.5rem 0 3rem;
}
.os-positioning-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}
.os-neg-card {
  padding: 1.25rem 1.25rem 1.1rem;
  border: 1px solid var(--os-line);
  border-radius: 14px;
  background: var(--os-paper);
}
.os-neg-card .os-neg-label {
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--os-muted);
  display: flex; align-items: center; gap: 0.4rem;
}
.os-neg-card .os-neg-label::before {
  content: "✕"; color: var(--os-accent); font-size: 0.85rem;
}
.os-neg-card h3 {
  font-size: 1.02rem; font-weight: 600; color: var(--os-ink);
  margin: 0.3rem 0 0;
}
.os-positioning-lead {
  max-width: 780px; margin: 1.75rem auto 0;
  text-align: center; color: var(--os-body);
  font-size: 1.02rem; line-height: 1.6;
}

/* ─── Section scaffolding ─────────────────────────────────────────── */
.os-section { padding: 5rem 0; }
.os-section-head {
  max-width: 760px; margin: 0 0 2.5rem;
}
.os-section-head .os-kicker {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--os-accent);
}
.os-section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.1; letter-spacing: -0.02em;
  color: var(--os-ink); font-weight: 700;
  margin: 0.5rem 0 0.75rem;
}
.os-section-head p {
  font-size: 1.05rem; line-height: 1.6; color: var(--os-body);
}

/* ─── Spectrum (§5.5 / §6) ────────────────────────────────────────── */
.os-spectrum { padding: 5rem 0; background: var(--os-paper); border-top: 1px solid var(--os-line); border-bottom: 1px solid var(--os-line); }
.os-spectrum-figure {
  margin-top: 1rem;
  background: var(--os-surface);
  border: 1px solid var(--os-line);
  border-radius: 18px;
  padding: 1.5rem;
  overflow: hidden;
}
.os-spectrum-svg { width: 100%; height: auto; display: block; }

.os-spectrum-svg .os-spec-stages text { fill: var(--os-ink); font-family: inherit; }
.os-spectrum-svg .os-spec-stage-n { font-weight: 700; font-size: 14px; fill: var(--os-accent); }
.os-spectrum-svg .os-spec-stage-l { font-weight: 700; font-size: 16px; }
.os-spectrum-svg .os-spec-stage-b { font-size: 12px; fill: var(--os-muted); }

.os-spectrum-svg .os-spec-features rect { fill: var(--os-accent-tint); stroke: var(--os-line-strong); stroke-width: 1; }
.os-spectrum-svg .os-spec-features text { font-size: 13px; fill: var(--os-accent-dark); font-family: inherit; font-weight: 600; }

.os-spectrum-svg .os-spec-bar-label { font-size: 13px; font-weight: 700; fill: var(--os-ink); font-family: inherit; letter-spacing: 0.02em; }

.os-spectrum-svg .os-spec-comp-bar { fill: var(--os-line-strong); }
.os-spectrum-svg .os-spec-comp-bar-us { fill: var(--os-accent); }
.os-spectrum-svg .os-spec-comp-label { font-size: 13px; font-weight: 700; fill: var(--os-ink); font-family: inherit; letter-spacing: 0.01em; }
.os-spectrum-svg .os-spec-comp-label-us { fill: var(--os-accent-dark); }
.os-spectrum-svg .os-spec-comp-note { font-size: 11.5px; fill: var(--os-muted); font-family: inherit; }
.os-spectrum-svg .os-spec-comp-note-us { fill: var(--os-accent-dark); font-weight: 600; }

/* Stage labels with a destination page act like links */
.os-spectrum-svg .os-spec-stage-link { cursor: pointer; }
.os-spectrum-svg .os-spec-stage-link a:hover .os-spec-stage-l { fill: var(--os-accent); text-decoration: underline; }
.os-spectrum-svg .os-spec-stage-link a:hover .os-spec-stage-n { fill: var(--os-accent-dark); }
.os-spectrum-svg .os-spec-stage-link a { text-decoration: none; }

/* Mobile/desktop swap (§6.3 — mobile is its own layout, not a squished desktop) */
.os-spectrum-mobile { display: none; }
.os-spectrum-desktop { display: block; }
@media (max-width: 768px) {
  .os-spectrum-desktop { display: none; }
  .os-spectrum-mobile { display: block; }
}

/* Mobile spectrum layout */
.os-spectrum-mobile { padding: 0.5rem 0.25rem; }
.os-spec-mlist {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0;
  border-left: 4px solid var(--os-accent);
}
.os-spec-mstage {
  position: relative;
  padding: 1rem 1rem 1rem 1.25rem;
  border-bottom: 1px solid var(--os-line);
}
.os-spec-mstage:last-child { border-bottom: none; }
.os-spec-mstage::before {
  content: "";
  position: absolute; left: -10px; top: 1.05rem;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--os-accent); border: 3px solid var(--os-paper);
}
.os-spec-mstage-head { display: flex; gap: 0.75rem; align-items: baseline; }
.os-spec-mstage-n {
  flex: none; font-weight: 700; font-size: 0.85rem; color: var(--os-accent);
  letter-spacing: 0.06em;
}
.os-spec-mstage-meta { display: flex; flex-direction: column; gap: 0.1rem; min-width: 0; }
.os-spec-mstage-l { font-weight: 700; font-size: 1.05rem; color: var(--os-ink); text-decoration: none; }
a.os-spec-mstage-l:hover { color: var(--os-accent); text-decoration: underline; }
.os-spec-mstage-b { font-size: 0.85rem; color: var(--os-muted); }
.os-spec-mstage-feature {
  display: inline-block; margin: 0.5rem 0 0.5rem 0;
  padding: 0.2rem 0.55rem; border-radius: 6px;
  background: var(--os-accent-tint); color: var(--os-accent-dark);
  font-size: 0.8rem; font-weight: 600;
  border: 1px solid var(--os-line-strong);
}
.os-spec-mstage-comps {
  list-style: none; margin: 0.4rem 0 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.25rem;
}
.os-spec-mstage-comps li { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; color: var(--os-muted); }
.os-spec-mstage-comps li.os-spec-mcomp-us { color: var(--os-accent-dark); font-weight: 600; }
.os-spec-mcomp-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--os-line-strong); flex: none; }
.os-spec-mcomp-us .os-spec-mcomp-dot { background: var(--os-accent); }
.os-spec-mfoot {
  margin: 1rem 0.25rem 0; padding: 0.75rem 0.85rem;
  font-size: 0.85rem; color: var(--os-ink);
  background: var(--os-accent-tint); border-radius: 8px;
  border: 1px solid var(--os-line-strong);
}

/* ─── Pain-first (§5.6) ───────────────────────────────────────────── */
.os-pain { background: var(--os-surface); }
.os-pain-grid {
  list-style: none; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
}
.os-pain-card {
  border: 1px solid var(--os-line);
  border-radius: 14px;
  padding: 1.25rem 1.1rem 1.25rem;
  background: var(--os-paper);
  display: flex; flex-direction: column; gap: 0.5rem;
}
.os-pain-n {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem; font-weight: 600; color: var(--os-accent);
  letter-spacing: 0.04em;
}
.os-pain-card h3 {
  font-size: 1rem; font-weight: 650; color: var(--os-ink);
  letter-spacing: -0.01em; line-height: 1.3;
}
.os-pain-card p { font-size: 0.9rem; line-height: 1.5; color: var(--os-body); }

/* ─── Capability sections / How it works (§5.7) ───────────────────── */
.os-problems { background: var(--os-surface); }
.os-problem-group { margin-top: 2.5rem; }
.os-problem-group:first-of-type { margin-top: 0; }
.os-group-head {
  display: flex; align-items: baseline; gap: 0.85rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem; border-bottom: 1px solid var(--os-line);
}
.os-group-tag {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--os-accent);
  border: 1px solid var(--os-line-strong); background: var(--os-accent-tint);
  padding: 0.22rem 0.55rem; border-radius: 999px;
  white-space: nowrap;
}
.os-group-head h3 {
  font-size: 1.5rem; font-weight: 700; color: var(--os-ink);
  letter-spacing: -0.015em; line-height: 1.2;
}
.os-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem;
}
.os-card {
  padding: 1.5rem 1.65rem 1.6rem;
  border-radius: 16px; border: 1px solid;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 1rem; row-gap: 0.7rem;
  align-items: center;
  position: relative; overflow: hidden;
}
.os-card h4 {
  font-size: 1.1rem; font-weight: 650; color: var(--os-ink);
  line-height: 1.3; letter-spacing: -0.01em;
  margin: 0;
}
.os-card p {
  font-size: 0.98rem; line-height: 1.55; color: var(--os-body);
  grid-column: 1 / -1;
  margin: 0;
}
.os-card .os-icon {
  width: 66px; height: 66px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; box-shadow: 0 1px 0 rgba(0,0,0,0.04), inset 0 0 0 1px rgba(0,0,0,0.04);
  color: var(--os-accent); flex-shrink: 0;
}
.os-card .os-icon svg { width: 36px; height: 36px; display: block; }
.os-peach { background: var(--os-peach); border-color: var(--os-peach-line); }
.os-mint  { background: var(--os-mint);  border-color: var(--os-mint-line); }
.os-sky   { background: var(--os-sky);   border-color: var(--os-sky-line); }
.os-lilac { background: var(--os-lilac); border-color: var(--os-lilac-line); }
.os-sand  { background: var(--os-sand);  border-color: var(--os-sand-line); }

/* ─── Who it's for (audience cards) ──────────────────────────────── */
.os-audience { background: var(--os-paper); }
.os-audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.os-aud-card {
  background: var(--os-surface);
  border: 1px solid var(--os-line);
  border-radius: 16px;
  padding: 1.75rem 1.75rem 1.5rem;
  display: flex; flex-direction: column; gap: 0.5rem;
  transition: border-color .15s ease, transform .12s ease;
  color: inherit; text-decoration: none;
}
.os-aud-card:hover {
  border-color: var(--os-ink);
  transform: translateY(-2px);
}
.os-aud-card h3 {
  font-size: 1.2rem; font-weight: 650; color: var(--os-ink);
  letter-spacing: -0.01em; margin: 0;
}
.os-aud-card p {
  font-size: 0.98rem; color: var(--os-body); line-height: 1.55;
  margin: 0;
}
.os-aud-card .os-aud-link {
  margin-top: auto; padding-top: 0.75rem;
  font-weight: 600; font-size: 0.92rem; color: var(--os-accent);
  display: inline-flex; align-items: center; gap: 0.35rem;
}
.os-aud-card .os-aud-link::after { content: "→"; transition: transform .15s ease; }
.os-aud-card:hover .os-aud-link::after { transform: translateX(3px); }

/* ─── Scale band (§5.8) ───────────────────────────────────────────── */
.os-scale {
  background:
    radial-gradient(800px 400px at 10% 110%, rgba(124,58,237,0.22) 0%, transparent 60%),
    radial-gradient(700px 400px at 90% -20%, rgba(99,102,241,0.20) 0%, transparent 60%),
    var(--os-dark);
  color: #e6e8ef;
  padding: 5rem 0;
}
.os-scale .os-section-head h2 { color: #fff; }
.os-scale .os-section-head .os-kicker { color: #c4b5fd; }
.os-scale .os-section-head p { color: #b9beca; }
.os-scale-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem; margin-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2rem;
}
.os-scale-stat .os-stat-num {
  font-size: 2.25rem; font-weight: 700; color: #fff;
  letter-spacing: -0.03em; line-height: 1;
}
.os-scale-stat .os-stat-label {
  font-size: 0.92rem; color: #97a0b3; margin-top: 0.4rem;
}

/* ─── Beta partners (§5.9) ────────────────────────────────────────── */
.os-partners { background: var(--os-paper); }
.os-partner-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem;
}
.os-partner {
  border: 1px solid var(--os-line);
  border-radius: 18px;
  padding: 2rem;
  background: linear-gradient(180deg, var(--os-paper) 0%, #fff 100%);
  display: flex; flex-direction: column; gap: 1rem;
}
.os-partner-head {
  display: flex; align-items: center; gap: 0.9rem;
}
.os-partner-logo {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--os-ink); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; letter-spacing: 0.02em;
}
.os-partner-name {
  font-size: 1.15rem; font-weight: 700; color: var(--os-ink);
  letter-spacing: -0.01em;
}
.os-partner-name small {
  display: block; font-size: 0.82rem; color: var(--os-muted);
  font-weight: 500; letter-spacing: 0.01em; margin-top: 0.15rem;
}
.os-partner p { font-size: 0.98rem; color: var(--os-body); line-height: 1.55; }
.os-partner-link {
  margin-top: auto; padding-top: 0.25rem;
  font-weight: 600; font-size: 0.92rem; color: var(--os-accent);
  display: inline-flex; align-items: center; gap: 0.35rem;
}
.os-partner-link::after { content: "↗"; }
.os-partner-note {
  margin-top: 1.5rem; font-size: 0.95rem;
  text-align: center; color: var(--os-muted);
}

/* ─── Integrations strip (§5.10) ──────────────────────────────────── */
.os-integrations { background: var(--os-surface); }
.os-integrations-head { text-align: center; margin-bottom: 2rem; }
.os-integrations-head .os-kicker { color: var(--os-accent); }
.os-integrations-head h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  color: var(--os-ink); font-weight: 700;
  letter-spacing: -0.02em; margin-top: 0.4rem;
}
.os-logos {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  max-width: 920px; margin: 0 auto;
}
.os-logo {
  display: flex; align-items: center; justify-content: center;
  height: 70px; background: var(--os-paper);
  border: 1px solid var(--os-line);
  border-radius: 12px;
  font-weight: 600; color: var(--os-ink);
  font-size: 0.98rem; letter-spacing: -0.01em;
  transition: border-color .12s ease, transform .12s ease;
}
.os-logo:hover { border-color: var(--os-ink); transform: translateY(-1px); }
.os-integrations-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 1rem 1.75rem; margin-top: 2rem;
  font-size: 0.95rem;
}
.os-integrations-links a {
  color: var(--os-ink); font-weight: 600;
  border-bottom: 1px solid var(--os-line-strong);
  padding-bottom: 2px;
}
.os-integrations-links a:hover {
  color: var(--os-accent); border-bottom-color: var(--os-accent);
}

/* ─── Final CTA (§5.11) ───────────────────────────────────────────── */
.os-final-cta {
  background: var(--os-ink);
  color: #fff;
  padding: 5rem 0;
  text-align: center;
}
.os-final-cta h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700; letter-spacing: -0.025em; line-height: 1.1;
  color: #fff; max-width: 780px; margin: 0 auto;
}
.os-final-cta h2 em {
  font-style: normal; color: #c4b5fd;
}
.os-final-cta p {
  font-size: 1.05rem; color: #b9beca;
  max-width: 620px; margin: 1rem auto 0; line-height: 1.6;
}
.os-final-cta .os-cta-row {
  justify-content: center; margin-top: 2.25rem;
}
.os-final-cta .os-btn-primary { background: var(--os-accent); }
.os-final-cta .os-btn-primary:hover { background: #8b5cf6; color: #fff; }
.os-final-cta .os-btn-ghost {
  background: transparent; color: #fff;
  border-color: rgba(255,255,255,0.22);
}
.os-final-cta .os-btn-ghost:hover {
  background: rgba(255,255,255,0.06); border-color: #fff; color: #fff;
}

/* ─── Footer (§5.12) ──────────────────────────────────────────────── */
.os-footer {
  background: var(--os-paper);
  border-top: 1px solid var(--os-line);
  padding: 3rem 0 2rem;
  color: var(--os-body);
}
.os-footer-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  gap: 2rem;
  align-items: start;
}
.os-footer-col h4 {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--os-ink);
  margin-bottom: 0.85rem;
}
.os-footer-col ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.os-footer-col a { color: var(--os-body); font-size: 0.95rem; }
.os-footer-col a:hover { color: var(--os-accent); }
.os-footer-meta { font-size: 0.85rem; color: var(--os-muted); align-self: end; }

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .os-pain-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 880px) {
  .os-hero { padding: 3.75rem 0 3.5rem; }
  .os-section, .os-spectrum, .os-scale, .os-final-cta { padding: 3.5rem 0; }
  .os-positioning { padding: 2.5rem 0 2rem; }
  .os-positioning-grid { grid-template-columns: 1fr; }
  .os-cards { grid-template-columns: 1fr; }
  .os-pain-grid { grid-template-columns: 1fr; }
  .os-partner-grid { grid-template-columns: 1fr; }
  .os-scale-stats { grid-template-columns: 1fr 1fr; }
  .os-logos { grid-template-columns: repeat(3, 1fr); }
  .os-group-head { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
  .os-footer-inner { grid-template-columns: repeat(2, 1fr); }
  .os-footer-meta { grid-column: 1 / -1; padding-top: 1rem; border-top: 1px solid var(--os-line); }
  .os-nav-inner { gap: 0.85rem; flex-wrap: wrap; }
  .os-nav-links { order: 3; flex-basis: 100%; margin-left: 0; gap: 1rem; flex-wrap: wrap; }
  .os-nav-cta { margin-left: auto; }
}
@media (max-width: 480px) {
  .os-scale-stats { grid-template-columns: 1fr; }
  .os-logos { grid-template-columns: repeat(2, 1fr); }
  .os-btn { width: 100%; }
  .os-nav-cta .os-nav-login { display: none; }
  .os-footer-inner { grid-template-columns: 1fr; }
}

/* ─── Stage / per-page templates (Phase 2) ────────────────────────── */
.os-stage-hero {
  padding: 4rem 0 2rem;
  background: var(--os-paper);
  border-bottom: 1px solid var(--os-line);
}
.os-stage-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.1; letter-spacing: -0.02em;
  margin: 0.4rem 0 0.75rem;
  max-width: 22ch;
}
.os-stage-sub {
  font-size: 1.125rem; color: var(--os-body);
  max-width: 60ch;
}

.os-stage-body {
  padding: 3rem 0 4rem;
  background: var(--os-surface);
}
.os-prose {
  max-width: 70ch;
  font-size: 1.05rem; line-height: 1.65; color: var(--os-body);
}
.os-prose h2 {
  font-size: 1.4rem; line-height: 1.2; color: var(--os-ink);
  margin: 2.25rem 0 0.75rem; letter-spacing: -0.01em;
}
.os-prose h3 {
  font-size: 1.1rem; color: var(--os-ink);
  margin: 1.5rem 0 0.5rem;
}
.os-prose p { margin: 0 0 1rem; }
.os-prose ul, .os-prose ol { margin: 0 0 1.25rem; padding-left: 1.25rem; }
.os-prose li { margin: 0.35rem 0; }
.os-prose strong { color: var(--os-ink); }
.os-prose a { color: var(--os-accent-dark); text-decoration: underline; text-underline-offset: 2px; }
.os-prose a:hover { color: var(--os-accent); }
.os-prose code {
  background: var(--os-paper); padding: 0.05rem 0.35rem; border-radius: 4px;
  font-size: 0.92em; border: 1px solid var(--os-line);
}

.os-stage-spectrum-cta {
  margin: 2.5rem 0 0;
  padding: 1.25rem 1.5rem;
  background: var(--os-paper);
  border: 1px solid var(--os-line);
  border-left: 4px solid var(--os-accent);
  border-radius: 8px;
  max-width: 70ch;
}
.os-stage-spectrum-cta p { margin: 0.35rem 0 0; color: var(--os-body); }
.os-stage-spectrum-cta a { color: var(--os-accent-dark); }
.os-stage-spectrum-cta a:hover { color: var(--os-accent); text-decoration: underline; }

/* ─── Pricing page (§13) ──────────────────────────────────────────── */
.os-pricing { padding: 3rem 0 5rem; background: var(--os-surface); }
.os-pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem;
  align-items: stretch;
}
.os-price-card {
  position: relative;
  background: var(--os-paper);
  border: 2px solid var(--os-accent);
  border-radius: 14px;
  padding: 1.75rem 1.5rem 2rem;
  display: flex; flex-direction: column; gap: 0.85rem;
}
.os-price-card-recommended {
  background: #fff;
  box-shadow: 0 8px 32px -16px rgba(251, 146, 60, 0.45);
}

/* Tier escalation — Solo (light violet) → Team (tangerine) → Enterprise (hot pink) */
.os-price-card-solo       { border-color: #a78bfa; }
.os-price-card-solo       .os-price-badge { background: #a78bfa; }
.os-price-card-team       { border-color: #fb923c; }
.os-price-card-team       .os-price-badge { background: #fb923c; }
.os-price-card-enterprise { border-color: #e11d48; background: #fff7f9; }
.os-price-card-enterprise .os-price-badge { background: #e11d48; }
.os-price-card-enterprise .os-price-tier  { color: #e11d48; }

.os-price-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--os-accent); color: #fff;
  padding: 0.2rem 0.75rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
}
.os-price-tier { font-size: 1.4rem; font-weight: 700; color: var(--os-ink); }
.os-price-audience { color: var(--os-muted); font-size: 0.92rem; }
.os-price-amount { display: flex; align-items: baseline; gap: 0.4rem; margin: 0.5rem 0 0.25rem; }
.os-price-amount span { font-size: 2.25rem; font-weight: 700; color: var(--os-ink); letter-spacing: -0.02em; }
.os-price-amount small { color: var(--os-muted); font-size: 0.95rem; }
.os-price-features { list-style: none; padding: 0; margin: 0.25rem 0 1rem; flex: 1; display: flex; flex-direction: column; gap: 0.4rem; }
.os-price-features li {
  position: relative; padding-left: 1.4rem;
  font-size: 0.95rem; color: var(--os-body); line-height: 1.45;
}
.os-price-features li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--os-accent); font-weight: 700;
}
.os-pricing-foot {
  margin: 2.5rem auto 0; max-width: 60ch; text-align: center;
  font-size: 0.95rem; color: var(--os-muted);
}
.os-pricing-foot a { color: var(--os-accent-dark); text-decoration: underline; }
.os-pricing-foot a:hover { color: var(--os-accent); }

/* ─── Contact page ────────────────────────────────────────────────── */
.os-contact { padding: 3rem 0 5rem; background: var(--os-surface); }
.os-contact-grid {
  display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 3rem; align-items: start;
}
.os-form { display: flex; flex-direction: column; gap: 1rem; max-width: 56ch; }
.os-form-note {
  background: var(--os-accent-tint); border: 1px solid var(--os-line-strong);
  padding: 0.75rem 0.95rem; border-radius: 8px;
  font-size: 0.9rem; color: var(--os-accent-dark); margin: 0 0 0.5rem;
}
.os-form-note a { color: var(--os-accent-dark); text-decoration: underline; }
.os-field { display: flex; flex-direction: column; gap: 0.35rem; }
.os-field-label { font-size: 0.88rem; font-weight: 600; color: var(--os-ink); }
.os-input {
  width: 100%; padding: 0.7rem 0.85rem;
  font-size: 1rem; font-family: inherit; color: var(--os-ink);
  background: var(--os-paper); border: 1px solid var(--os-line); border-radius: 8px;
}
.os-input:focus { outline: 2px solid var(--os-accent); outline-offset: 1px; border-color: var(--os-accent); }
.os-textarea { resize: vertical; min-height: 5rem; }
.os-contact-aside { background: var(--os-paper); border: 1px solid var(--os-line); border-radius: 12px; padding: 1.5rem 1.5rem 1.75rem; }
.os-contact-aside h3 { margin: 0 0 0.5rem; font-size: 1rem; color: var(--os-ink); }
.os-contact-aside h3 + ul, .os-contact-aside h3 + ol { margin: 0 0 1.25rem; padding-left: 1.1rem; color: var(--os-body); font-size: 0.95rem; line-height: 1.5; }
.os-contact-aside li { margin: 0.35rem 0; }
.os-contact-aside a { color: var(--os-accent-dark); text-decoration: underline; }

/* ─── Signup placeholder page ─────────────────────────────────────── */
.os-signup { padding: 3rem 0 5rem; background: var(--os-surface); }
.os-signup-card {
  max-width: 60ch; margin: 0 auto;
  background: var(--os-paper); border: 1px solid var(--os-line); border-radius: 14px;
  padding: 1.75rem 1.75rem 2rem;
}
.os-signup-card h3 { margin: 1.25rem 0 0.5rem; font-size: 1rem; color: var(--os-ink); }
.os-signup-card ul { margin: 0 0 1rem; padding-left: 1.1rem; color: var(--os-body); }
.os-signup-card li { margin: 0.35rem 0; }
.os-signup-card p { color: var(--os-body); }

/* ─── Demo page (long-form video) ─────────────────────────────────── */
.os-demo { padding: 2rem 0 5rem; background: var(--os-surface); }
.os-video-frame {
  background: #000; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--os-line);
  aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center;
}
.os-video-frame video { width: 100%; height: 100%; display: block; object-fit: contain; background: #000; }
.os-demo-foot { margin: 2rem auto 0; max-width: 60ch; text-align: center; color: var(--os-muted); }
.os-demo-foot a { color: var(--os-accent-dark); text-decoration: underline; }

/* Inline (per-feature & hero) video frames embedded on the homepage */
.os-video-inline {
  margin-top: 1rem; background: var(--os-accent-tint); border-radius: 22px; overflow: hidden;
  border: 1px solid var(--os-line); aspect-ratio: 9 / 19;
  max-width: 280px;
}
.os-video-inline video { width: 100%; height: 100%; display: block; object-fit: cover; background: var(--os-accent-tint); }
/* Wide variant (e.g. integrations) shows desktop product UIs side-by-side */
.os-video-inline.os-video-wide { aspect-ratio: 16 / 9; max-width: 720px; border-radius: 12px; }

/* Hero — two columns on desktop, stacked on mobile */
.os-hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 3rem; align-items: center;
}
.os-hero-text { max-width: 60ch; }
.os-hero-media { display: flex; justify-content: center; }
.os-hero-media .os-video-inline { margin-top: 0; }

/* Per-feature group video sits between heading and card grid */
.os-group-video { margin: 0.5rem 0 1.25rem; }

/* Pricing — revenue band (above price) */
.os-price-band {
  display: flex; flex-direction: column;
  margin: 0.5rem 0 0.75rem;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--os-line);
  border-radius: 8px;
  background: var(--os-paper);
}
.os-price-band-label {
  font-size: 0.7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--os-muted);
}
.os-price-band-value {
  font-size: 1.05rem; font-weight: 700; color: var(--os-ink);
  margin-top: 0.1rem;
}

/* Pricing — revenue share line on tier cards */
.os-price-share {
  margin: 0 0 1rem;
  padding: 0.6rem 0.85rem;
  background: var(--os-accent-tint, #f3edff);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--os-ink);
}
.os-price-share strong { color: var(--os-accent-dark); }

/* Contact form — error + success + honeypot */
.os-form-error {
  background: #fef2f2; border: 1px solid #fecaca; color: #991b1b;
  padding: 0.75rem 1rem; border-radius: 8px; margin: 0 0 1rem;
  font-size: 0.95rem;
}
.os-form-success {
  background: var(--os-paper);
  border: 1px solid var(--os-line);
  border-radius: 14px;
  padding: 2rem 1.75rem;
}
.os-form-success h2 { margin-top: 0; color: var(--os-ink); }
.os-honeypot {
  position: absolute; left: -9999px; width: 1px; height: 1px;
  overflow: hidden;
}

/* Zoomable video — small overlay button to open full screen */
.os-video-zoomable { position: relative; }
.os-video-zoomable video:fullscreen,
.os-video-zoomable video:-webkit-full-screen {
  object-fit: contain;
  background: #000;
}
.os-video-fullscreen {
  position: absolute; top: 0.55rem; right: 0.55rem;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(20, 20, 26, 0.55); color: #fff;
  border: none; border-radius: 6px; cursor: pointer; padding: 0;
  opacity: 0.35; transition: opacity 120ms ease, background-color 120ms ease;
}
.os-video-zoomable:hover .os-video-fullscreen,
.os-video-zoomable:focus-within .os-video-fullscreen { opacity: 1; }
.os-video-fullscreen:hover, .os-video-fullscreen:focus-visible {
  background: rgba(20, 20, 26, 0.85); opacity: 1; outline: none;
}

/* Hero player: stacked videos with tabs underneath (Railway-style chapter strip) */
.os-hero-player {
  display: flex; flex-direction: column; align-items: stretch; gap: 0.75rem;
  width: 100%; max-width: 280px;
}
.os-hero-player .os-video-inline { margin-top: 0; }
.os-hero-video { display: none; }
.os-hero-video.is-active { display: block; }
.os-hero-tabs {
  display: flex; gap: 0.5rem;
  width: 100%;
}
.os-hero-tab {
  flex: 1 1 0; min-width: 0;
  background: transparent; border: 0;
  padding: 0.35rem 0; margin: 0;
  display: flex; flex-direction: column; gap: 0.4rem;
  font: inherit; color: var(--os-muted);
  text-align: left; cursor: pointer;
  transition: color 120ms ease;
}
.os-hero-tab:hover { color: var(--os-ink); }
.os-hero-tab.is-active { color: var(--os-ink); }
.os-hero-tab-label {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.os-hero-tab-progress {
  display: block; height: 2px;
  background: var(--os-line); border-radius: 999px;
  overflow: hidden;
}
.os-hero-tab-fill {
  display: block; height: 100%; width: 0;
  background: var(--os-accent);
  transition: width 80ms linear;
}

/* Empty placeholder shown while a recording hasn't been produced yet */
.os-video-placeholder {
  background: linear-gradient(135deg, #f3edff 0%, #faf7ff 100%);
  border: 1px dashed var(--os-line-strong);
  display: flex; align-items: center; justify-content: center;
}
.os-placeholder-note {
  color: var(--os-accent-dark); font-weight: 600;
  padding: 1rem 1.5rem; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 0.85rem;
}
.os-placeholder-note small { display: block; margin-top: 0.35rem; font-size: 0.75rem; font-weight: 500; opacity: 0.75; }
.os-placeholder-icon { color: var(--os-accent); opacity: 0.65; }

/* ─── Case studies index ──────────────────────────────────────────── */
.os-cases { padding: 3rem 0 5rem; background: var(--os-surface); }
.os-case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.os-case-card {
  display: flex; flex-direction: column; gap: 0.6rem;
  background: var(--os-paper); border: 1px solid var(--os-line); border-radius: 14px;
  padding: 1.5rem 1.5rem 1.75rem;
  text-decoration: none; color: inherit;
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}
.os-case-card:hover { border-color: var(--os-accent); transform: translateY(-2px); box-shadow: 0 8px 28px -18px rgba(225, 90, 43, 0.5); }
.os-case-logo {
  width: 38px; height: 38px; border-radius: 8px;
  background: var(--os-accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem;
}
.os-case-card h2 { margin: 0; font-size: 1.4rem; color: var(--os-ink); }
.os-case-tagline { color: var(--os-muted); font-size: 0.9rem; margin: 0; }
.os-case-card p { color: var(--os-body); margin: 0; }
.os-case-arrow { color: var(--os-accent-dark); font-weight: 600; font-size: 0.95rem; margin-top: 0.4rem; }

/* ─── Responsive overrides for Phase 4 pages ──────────────────────── */
@media (max-width: 880px) {
  .os-pricing-grid { grid-template-columns: 1fr; }
  .os-price-card-recommended { transform: none; }
  .os-contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .os-case-grid { grid-template-columns: 1fr; }
  .os-hero-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .os-hero-media .os-video-inline { max-width: 220px; }
  .os-hero-player { max-width: 220px; }
}

/* Subscribe floater */
.os-subscribe-floater {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  font-family: inherit;
}
.os-subscribe-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  background: var(--os-accent);
  color: #ffffff;
  border: none;
  border-radius: 999px;
  padding: 0.75em 1.25em;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
  transition: transform 0.12s ease, background 0.15s ease;
}
.os-subscribe-toggle:hover { background: var(--os-accent-dark); transform: translateY(-1px); }
.os-subscribe-toggle:focus-visible { outline: 2px solid var(--os-ink); outline-offset: 2px; }
.os-subscribe-toggle svg { width: 16px; height: 16px; }
.os-subscribe-panel {
  position: absolute;
  bottom: calc(100% + 12px);
  right: 0;
  width: 320px;
  max-width: calc(100vw - 48px);
  background: var(--os-surface);
  border: 1px solid var(--os-line);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(10, 10, 15, 0.18);
  padding: 1.25rem;
  display: none;
}
.os-subscribe-floater.is-open .os-subscribe-panel { display: block; }
.os-subscribe-floater.is-open .os-subscribe-toggle { background: var(--os-accent-dark); }
.os-subscribe-panel h4 {
  margin: 0 0 0.25rem 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--os-ink);
}
.os-subscribe-panel p.os-subscribe-intro {
  margin: 0 0 0.85rem 0;
  font-size: 0.875rem;
  color: var(--os-muted);
  line-height: 1.45;
}
.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.subscribe-form input[type="email"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--os-line-strong);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--os-paper);
  color: var(--os-ink);
}
.subscribe-form input[type="email"]:focus {
  outline: none;
  border-color: var(--os-accent);
  background: var(--os-surface);
  box-shadow: 0 0 0 3px var(--os-accent-tint);
}
.subscribe-form button {
  background: var(--os-accent);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}
.subscribe-form button:hover:not(:disabled) { background: var(--os-accent-dark); }
.subscribe-form button:disabled { opacity: 0.6; cursor: not-allowed; }
.subscribe-message {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.4;
  min-height: 1.2em;
}
.subscribe-message.is-success { color: var(--os-accent-dark); }
.subscribe-message.is-error { color: #b91c1c; }
@media (max-width: 480px) {
  .os-subscribe-floater { bottom: 16px; right: 16px; }
  .os-subscribe-toggle { padding: 0.65em 1em; font-size: 0.9rem; }
  .os-subscribe-panel { width: calc(100vw - 32px); padding: 1rem; }
}