/* ─── RESET & BASE ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--s-6);
}
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: var(--s-4);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--s-4);
}
.section-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 660px;
}

/* ─── BUTTONS ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--r-md);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border: none;
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--blue-bright);
  box-shadow: 0 0 24px var(--blue-glow);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-mid);
}
.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-1px);
}
.btn-amber {
  background: var(--amber);
  color: #000;
}
.btn-amber:hover {
  box-shadow: var(--shadow-glow-amber);
  transform: translateY(-1px);
}

/* ─── NAV ───────────────────────────────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: var(--s-4) var(--s-6);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
#nav.scrolled {
  background: rgba(8, 8, 9, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
}
.nav-links {
  display: none;
  gap: var(--s-8);
  align-items: center;
}
.nav-cta {
  position: absolute;
  right: var(--s-6);
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--duration-fast);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text-primary); }
.nav-cta {
  position: absolute;
  right: var(--s-6);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--blue);
  border: 1px solid rgba(59,130,246,0.35);
  border-radius: var(--r-md);
  padding: 0.5rem 1.125rem;
  transition: all 0.25s var(--ease-out);
}
.nav-cta:hover {
  background: var(--blue-dim);
  border-color: var(--blue);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  position: absolute;
  left: var(--s-6);
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition:
    transform var(--duration-base) var(--ease-out),
    opacity var(--duration-base) var(--ease-out);
}
.nav-toggle:hover span { background: var(--text-primary); }
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav drawer — always position:absolute, shown via visibility not display */
.nav-drawer {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(8, 8, 9, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--s-5) var(--s-6);
  visibility: hidden;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition:
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    visibility 0s var(--duration-base);
}
.nav-drawer.open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  transition:
    opacity var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    visibility 0s;
}
.nav-drawer-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--duration-fast);
}
.nav-drawer-link:last-child { border-bottom: none; }
.nav-drawer-link:hover { color: var(--text-primary); }

@media (max-width: 899px) {
  .nav-toggle { display: flex; }
}

/* ─── HERO ───────────────────────────────────────────────────────────────────── */
#hero {
  position: relative;
  height: 100vh;
  min-height: 680px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg);
}
#neural-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, transparent 30%, var(--bg) 90%),
    linear-gradient(to bottom, transparent 50%, var(--bg) 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 var(--s-6);
  max-width: 860px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid rgba(59,130,246,0.28);
  border-radius: var(--r-full);
  padding: 0.375rem 1rem;
  background: rgba(59,130,246,0.07);
  margin-bottom: var(--s-8);
}
.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
  animation: pulse-dot 2.4s ease-in-out infinite;
}
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 8.5rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.03em;
  background: var(--grad-hero-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--s-6);
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.8vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--s-6);
}
.hero-highlight { color: var(--blue); }
.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 680px;
  margin: 0 auto var(--s-8);
  letter-spacing: 0.01em;
}
.hero-ctas {
  display: flex;
  gap: var(--s-3);
  justify-content: center;
  flex-wrap: wrap;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: var(--s-6);
}
.hero-badge {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  padding: 0.3rem 0.875rem;
}
.hero-pill-cta {
  margin-top: var(--s-8);
  display: flex;
  justify-content: center;
}
.hero-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--r-full);
  padding: 0.625rem 1.5rem;
  transition: all 0.25s var(--ease-out);
}
.hero-pill-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-dim);
}
.hero-pill-arrow {
  font-size: 1rem;
  transition: transform 0.2s;
}
.hero-pill-btn:hover .hero-pill-arrow {
  transform: translateX(3px);
}
.hero-scroll {
  position: absolute;
  bottom: var(--s-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
  z-index: 2;
}
.hero-scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--border), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}
.hero-scroll-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ─── BUILDING STRIP ─────────────────────────────────────────────────────────── */
#building-strip {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.875rem 0;
  overflow: hidden;
  position: relative;
}
.strip-inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
}
.strip-prefix {
  flex-shrink: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0 var(--s-4);
  border-right: 1px solid var(--border);
  display: none;
}
.strip-overflow { overflow: hidden; flex: 1; }
.strip-track {
  display: flex;
  gap: 2.5rem;
  white-space: nowrap;
  width: max-content;
  animation: marquee 28s linear infinite;
}
.strip-item {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.strip-dot {
  color: var(--blue);
  opacity: 0.4;
}

/* ─── CASE STUDY ──────────────────────────────────────────────────────────────── */
#case-study {
  padding: var(--s-24) 0;
  background: var(--bg);
}
.cs-blocks {
  margin-top: var(--s-16);
  display: flex;
  flex-direction: column;
  gap: 0;
}
.cs-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-10);
  padding: var(--s-12) 0;
  border-top: 1px solid var(--border);
}
.cs-block:last-child {
  border-bottom: 1px solid var(--border);
}
.cs-problem-num {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--s-3);
}
.cs-headline {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: var(--s-6);
}
.cs-segments {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}
.cs-segment {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.cs-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  padding: 0.2rem 0.6rem;
  width: fit-content;
}
.cs-tag-problem {
  color: #f87171;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.2);
}
.cs-tag-system {
  color: var(--blue-bright);
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.2);
}
.cs-tag-outcome {
  color: #34d399;
  background: rgba(52,211,153,0.07);
  border: 1px solid rgba(52,211,153,0.18);
}
.cs-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.cs-outcome-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.7;
}

/* ─── CASE STUDY VISUALS ─────────────────────────────────────────────────────── */
.cs-visual {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.cs-visual-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}
.cv-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.cv-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 6px rgba(34,197,94,0.5);
  flex-shrink: 0;
  animation: pulse-dot 2.4s ease-in-out infinite;
}

/* Visual 01 — Channel Acquisition Intelligence */
.cv-acq-grid {
  display: flex;
  flex-direction: column;
  padding: 0.375rem 0;
}
.cv-acq-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
}
.cv-acq-row:last-child { border-bottom: none; }
.cv-acq-ch {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}
.cv-acq-leads {
  font-size: var(--text-xs);
  color: var(--text-muted);
  white-space: nowrap;
}
.cv-acq-conv {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.cv-acq-pill {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--r-sm);
  padding: 0.15rem 0.5rem;
  white-space: nowrap;
}
.cv-acq-high {
  color: #34d399;
  background: rgba(52,211,153,0.08);
  border: 1px solid rgba(52,211,153,0.2);
}
.cv-acq-med {
  color: var(--blue-bright);
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.2);
}
.cv-acq-low {
  color: var(--amber);
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.2);
}

/* Visual 01b — Chat UI */
.cv-messages {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  padding: 1rem;
}
.cv-msg {
  max-width: 82%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--r-lg);
  font-size: var(--text-xs);
  line-height: 1.5;
}
.cv-msg-user {
  align-self: flex-end;
  background: var(--blue);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.cv-msg-ai {
  align-self: flex-start;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-bottom-left-radius: 4px;
}
.cv-intent-alert {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
  padding: 0.375rem 0.75rem;
  background: rgba(245,158,11,0.07);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--r-md);
  font-size: 10px;
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.04em;
}
.cv-intent-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  flex-shrink: 0;
}

/* Visual 02 — Pipeline flow */
.cv-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.25rem 1rem;
  gap: 0;
}
.cv-flow-node {
  width: 100%;
  max-width: 240px;
  text-align: center;
  padding: 0.6rem 1rem;
  border-radius: var(--r-md);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
}
.cv-node-red {
  color: #f87171;
  border-color: rgba(248,113,113,0.3);
  background: rgba(248,113,113,0.06);
}
.cv-node-blue {
  color: var(--blue-bright);
  border-color: rgba(59,130,246,0.3);
  background: var(--blue-dim);
}
.cv-flow-connector {
  width: 2px;
  height: 28px;
  background: linear-gradient(to bottom, var(--border), transparent);
  flex-shrink: 0;
}

/* Visual 03 — Bar chart */
.cv-chart-rows {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
}
.cv-chart-row {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}
.cv-chart-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
  width: 52px;
  flex-shrink: 0;
  font-weight: 500;
}
.cv-chart-track {
  flex: 1;
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.cv-chart-fill {
  height: 100%;
  background: var(--blue);
  border-radius: 4px;
}
.cv-fill-purple { background: #818cf8; }
.cv-fill-green  { background: #34d399; }
.cv-fill-amber  { background: var(--amber); }
.cv-chart-value {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
  width: 44px;
  text-align: right;
  flex-shrink: 0;
}

/* Visual 04 — Workflow list */
.cv-workflow-list {
  display: flex;
  flex-direction: column;
  padding: 0.875rem 1rem;
  gap: 0;
}
.cv-workflow-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border);
}
.cv-workflow-row:last-child { border-bottom: none; }
.cv-wf-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.cv-wf-active { background: #22c55e; box-shadow: 0 0 6px rgba(34,197,94,0.5); }
.cv-wf-idle   { background: var(--border-mid); }
.cv-wf-name {
  flex: 1;
  font-size: var(--text-xs);
  color: var(--text-secondary);
  font-weight: 500;
}
.cv-wf-badge {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #34d399;
  background: rgba(52,211,153,0.08);
  border: 1px solid rgba(52,211,153,0.2);
  border-radius: var(--r-sm);
  padding: 0.15rem 0.5rem;
}
.cv-badge-idle {
  color: var(--text-muted);
  background: transparent;
  border-color: var(--border);
}

/* Visual 05 — Metrics grid */
.cv-metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}
.cv-metric {
  background: var(--surface);
  padding: 0.875rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.cv-metric-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.cv-metric-value {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.cv-metric-delta {
  font-size: var(--text-xs);
  font-weight: 600;
}
.cv-delta-up      { color: #34d399; }
.cv-delta-neutral { color: var(--text-muted); }

/* ─── SYSTEMS ─────────────────────────────────────────────────────────────────── */
#systems {
  padding: var(--s-24) 0;
  background: var(--bg-2);
}
.systems-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin-top: var(--s-12);
}
.system-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--s-8);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.system-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-card);
  opacity: 0;
  transition: opacity var(--duration-base);
}
.system-card:hover {
  border-color: var(--border-mid);
  box-shadow: 0 0 30px var(--blue-glow-lg);
  transform: translateY(-2px);
}
.system-card:hover::before { opacity: 1; }
.system-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--r-lg);
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--s-4);
  color: var(--blue);
  position: relative;
  z-index: 1;
}
.system-icon svg { width: 20px; height: 20px; stroke-width: 1.5; fill: none; stroke: currentColor; }
.system-name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--s-2);
  position: relative;
  z-index: 1;
}
.system-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* ─── TECH STACK ──────────────────────────────────────────────────────────────── */
#stack {
  padding: var(--s-24) 0;
  background: var(--bg);
}
.stack-categories {
  margin-top: var(--s-12);
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}
.stack-category { display: flex; flex-direction: column; gap: var(--s-3); }
.stack-category-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.stack-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}
.stack-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.5rem 1rem;
  transition: all var(--duration-base) var(--ease-out);
  cursor: default;
}
.stack-pill:hover {
  color: var(--blue-bright);
  border-color: rgba(59,130,246,0.3);
  background: var(--blue-dim);
}
.stack-pill.coming-soon {
  opacity: 0.45;
  font-style: italic;
}
.stack-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.5;
}

/* ─── PROCESS ─────────────────────────────────────────────────────────────────── */
#process {
  padding: var(--s-24) 0;
  background: var(--bg-2);
}
.process-steps {
  margin-top: var(--s-12);
}
.process-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--s-8);
  padding: var(--s-8) 0;
  border-top: 1px solid var(--border);
  align-items: start;
}
.step-number {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--blue);
  opacity: 0.55;
  padding-top: 0.2rem;
}
.step-content h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--s-2);
}
.step-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ─── ABOUT / FOUNDER CARD ────────────────────────────────────────────────────── */
#about {
  padding: var(--s-24) 0;
  background: var(--bg);
}
.founder-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-12);
  margin-top: var(--s-12);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--s-8);
}
.founder-photo-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
}
.founder-photo {
  border-radius: var(--r-xl);
  background: var(--surface-2);
  border: 1px solid var(--border);
  overflow: hidden;
  max-width: 260px;
}
.founder-headshot-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--r-xl);
}
.founder-photo-placeholder {
  width: 100%;
  min-height: 220px;
  background: linear-gradient(135deg, var(--blue-dim) 0%, var(--surface-2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--blue-bright);
  letter-spacing: -0.02em;
  opacity: 0.5;
}
.founder-stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  max-width: 260px;
}
.founder-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.3rem 0.625rem;
}
.founder-bio {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}
.founder-bio p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
}
.founder-specialties {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.founder-specialty-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.founder-specialties ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}
.founder-specialties li {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--blue-bright);
  background: var(--blue-dim);
  border: 1px solid rgba(59,130,246,0.2);
  border-radius: var(--r-md);
  padding: 0.3rem 0.7rem;
  list-style: none;
}
.founder-links {
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding-top: var(--s-3);
}

/* ─── SYSTEM WALKTHROUGHS ─────────────────────────────────────────────────────── */
#walkthroughs {
  padding: var(--s-24) 0;
  background: var(--bg-2);
}
.walkthroughs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin-top: var(--s-12);
}
.walkthrough-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
}
.walkthrough-card:hover {
  border-color: var(--border-mid);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.walkthrough-thumb {
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.walkthrough-thumb-1 { background: linear-gradient(135deg, rgba(59,130,246,0.12), rgba(99,102,241,0.16)); }
.walkthrough-thumb-2 { background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(59,130,246,0.1)); }
.walkthrough-thumb-3 { background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(59,130,246,0.08)); }
.walkthrough-thumb-4 { background: linear-gradient(135deg, rgba(124,58,237,0.12), rgba(59,130,246,0.08)); }
.walkthrough-play {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.4);
  padding-left: 3px;
  transition: all 0.25s var(--ease-out);
}
.walkthrough-card:hover .walkthrough-play {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  box-shadow: 0 0 20px var(--blue-glow);
}
.walkthrough-info {
  padding: var(--s-4) var(--s-4);
  border-top: 1px solid var(--border);
}
.walkthrough-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--s-2);
}
.walkthrough-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

/* ─── CTA ─────────────────────────────────────────────────────────────────────── */
#contact {
  padding: var(--s-24) 0;
  background: var(--bg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
#contact::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.cta-block {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.cta-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--s-6);
}
.cta-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--s-6);
}
.cta-secondary {
  font-size: var(--text-sm);
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-bottom: var(--s-12);
}
.cta-buttons {
  display: flex;
  gap: var(--s-3);
  justify-content: center;
  flex-wrap: wrap;
}
.cta-btn { padding: 0.875rem 2rem; }
.cta-btn-secondary { padding: 0.875rem 2rem; }

/* ─── FOOTER ──────────────────────────────────────────────────────────────────── */
#footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.footer-main { padding: var(--s-16) 0 var(--s-12); }
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-8);
}
.footer-cta-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.footer-cta-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.footer-cta-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 280px;
}
.footer-talk-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--r-full);
  padding: 0.55rem 1.25rem;
  width: fit-content;
  transition: all 0.25s var(--ease-out);
}
.footer-talk-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
}
.footer-links-col {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.footer-col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--s-2);
}
.footer-links-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.footer-links-col a {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--duration-fast);
}
.footer-links-col a:hover { color: var(--text-primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: var(--s-4) 0;
}
.footer-bottom-inner {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  align-items: center;
  text-align: center;
}
.footer-legal {
  display: flex;
  gap: var(--s-6);
}
.footer-legal a {
  font-size: var(--text-xs);
  color: var(--text-muted);
  transition: color var(--duration-fast);
}
.footer-legal a:hover { color: var(--text-secondary); }
.footer-legal a[aria-disabled="true"] {
  opacity: 0.4;
  pointer-events: none;
  cursor: default;
}
.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* ─── MID-PAGE CTA ───────────────────────────────────────────────────────────── */
.mid-cta {
  padding: var(--s-16) 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.mid-cta-block {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-4);
}
.mid-cta-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.mid-cta-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── RESPONSIVE ──────────────────────────────────────────────────────────────── */
@media (min-width: 640px) {
  .systems-grid { grid-template-columns: 1fr 1fr; }
  .walkthroughs-grid { grid-template-columns: 1fr 1fr; }
  .strip-prefix { display: block; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 768px) {
  .cs-block {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-12);
    align-items: center;
  }
  .cs-block-alt .cs-visual { order: -1; }
  .founder-card { grid-template-columns: 260px 1fr; padding: var(--s-12); }
  .process-steps { display: grid; grid-template-columns: 1fr 1fr; }
  .process-step { border-top: 1px solid var(--border); border-left: none; }
}

@media (min-width: 900px) {
  .nav-links { display: flex; }
  /* Lock drawer invisible on desktop regardless of JS state */
  .nav-drawer {
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }
}

@media (min-width: 1024px) {
  .systems-grid { grid-template-columns: repeat(3, 1fr); }
  .stack-categories { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-8) var(--s-16); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--s-12); }
  .footer-bottom-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}