.how {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-6);
  position: relative;
  overflow: hidden;
  background: var(--bg-base);
}

.phase-shift {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  isolation: isolate;
}

.phase-stage {
  position: relative;
  height: 380px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-base);
  border: 1px solid color-mix(in oklab, var(--color-passive-300) 60%, transparent);
  isolation: isolate;
  transition: --accent 800ms ease;
}

.phase-stage-scene {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: radial-gradient(
    120% 80% at 50% -10%,
    color-mix(in oklab, var(--accent) 42%, var(--bg-base)) 0%,
    color-mix(in oklab, var(--accent) 16%, var(--bg-base)) 32%,
    var(--bg-base) 70%,
    var(--bg-base) 100%
  );
  transition: background 800ms ease;
}

.phase-stage-horizon {
  position: absolute;
  left: 50%;
  top: 30px;
  transform: translateX(-50%);
  width: 560px;
  height: 360px;
  pointer-events: none;
  z-index: -1;
  opacity: 0.95;
}
.phase-stage-horizon .orb {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 360px;
  height: 360px;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.45;
  background: radial-gradient(
    circle at 50% 50%,
    var(--accent) 0%,
    color-mix(in oklab, var(--accent) 60%, white) 30%,
    transparent 70%
  );
  transition: background 800ms ease;
}
.phase-stage-horizon .ripple { display: none; }

.phase-stage-glyphs {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 0;
  padding-bottom: 110px;
}
.phase-glyph {
  grid-area: 1 / 1;
  font-family: var(--font-display);
  font-size: 120px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.9);
  transition:
    opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
  filter: drop-shadow(0 0 24px color-mix(in oklab, currentColor 55%, transparent));
}
.phase-glyph[data-glyph="activation"] { color: var(--color-amber-500); }
.phase-glyph[data-glyph="peak"]       { color: var(--color-teal-500); }
.phase-glyph[data-glyph="dip"]        { color: var(--color-slate-500); }
.phase-glyph[data-glyph="rebound"]    { color: var(--color-coral-500); }
.phase-glyph[data-glyph="winddown"]   { color: var(--color-indigo-500); }
.phase-glyph svg { width: 110px; height: 110px; }

.phase-stage[data-phase="activation"] .phase-glyph[data-glyph="activation"],
.phase-stage[data-phase="peak"]       .phase-glyph[data-glyph="peak"],
.phase-stage[data-phase="dip"]        .phase-glyph[data-glyph="dip"],
.phase-stage[data-phase="rebound"]    .phase-glyph[data-glyph="rebound"],
.phase-stage[data-phase="winddown"]   .phase-glyph[data-glyph="winddown"] {
  opacity: 1;
  transform: scale(1);
}

.phase-stage-label {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--space-8) var(--space-8) var(--space-10);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--space-6);
  z-index: 1;
}
.phase-stage-label .name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.4rem + 2vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-passive-800);
}
.phase-stage-label .name em {
  color: color-mix(in oklab, var(--accent) 80%, var(--color-passive-800));
}
.phase-stage-label .window {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-passive-500);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.phase-stage-label .window::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.phase-stage-tip {
  max-width: 360px;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: color-mix(in oklab, var(--color-passive-800) 75%, transparent);
  text-align: right;
  text-wrap: balance;
}
.phase-stage-tip::before {
  content: '"';
  font-family: var(--font-display);
  font-style: italic;
  font-size: 38px;
  line-height: 0;
  color: var(--accent);
  vertical-align: -12px;
  margin-right: 6px;
}

.phase-ribbon {
  margin-top: var(--space-6);
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  border-radius: var(--radius-md);
}
.phase-tab {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--color-passive-100) 80%, var(--bg-base));
  border: 1px solid color-mix(in oklab, var(--color-passive-300) 50%, transparent);
  text-align: left;
  transition: background var(--t), border-color var(--t), transform var(--t);
  cursor: pointer;
  --accent: var(--color-passive-500);
}
.phase-tab[data-phase="activation"] { --accent: var(--color-amber-500); }
.phase-tab[data-phase="peak"]       { --accent: var(--color-teal-500); }
.phase-tab[data-phase="dip"]        { --accent: var(--color-slate-500); }
.phase-tab[data-phase="rebound"]    { --accent: var(--color-coral-500); }
.phase-tab[data-phase="winddown"]   { --accent: var(--color-indigo-500); }

.phase-tab:hover {
  background: var(--bg-base);
  border-color: color-mix(in oklab, var(--accent) 40%, transparent);
}
.phase-tab.is-active {
  background: var(--bg-base);
  border-color: color-mix(in oklab, var(--accent) 60%, transparent);
  box-shadow:
    0 0 0 1px color-mix(in oklab, var(--accent) 30%, transparent),
    0 8px 28px -16px color-mix(in oklab, var(--accent) 80%, transparent);
}
.phase-tab .tab-bar {
  width: 100%;
  height: 3px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--accent) 18%, transparent);
  overflow: hidden;
  position: relative;
}
.phase-tab .tab-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}
.phase-tab.is-active .tab-bar::after { transform: scaleX(1); }

.phase-tab .tab-top {
  display: flex;
  justify-content: space-between;
  width: 100%;
  align-items: center;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-passive-500);
}
.phase-tab .tab-num { color: var(--accent); font-variant-numeric: tabular-nums; }
.phase-tab .tab-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-passive-800);
}
.phase-tab .tab-name em {
  color: color-mix(in oklab, var(--accent) 80%, var(--color-passive-800));
}

.how-start {
  margin-top: clamp(var(--space-16), 8vw, var(--space-24));
}

.how-start-head {
  text-align: center;
  margin-bottom: var(--space-12);
}
.how-start-head h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.015em;
  color: var(--color-passive-800);
  margin-bottom: var(--space-3);
}
.how-start-head p {
  font-size: var(--text-sm);
  color: var(--color-passive-500);
  max-width: 48ch;
  margin: 0 auto;
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  max-width: 920px;
  margin: 0 auto;
  counter-reset: step;
}
.step {
  position: relative;
  padding: var(--space-6) var(--space-5);
  background: var(--bg-base);
  border: 1px solid color-mix(in oklab, var(--color-passive-300) 60%, transparent);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  counter-increment: step;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 36px;
  line-height: 1;
  color: color-mix(in oklab, var(--brand) 60%, var(--color-passive-400));
  font-variant-numeric: tabular-nums;
}
.step h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  color: var(--color-passive-800);
}
.step p {
  font-size: var(--text-sm);
  color: var(--color-passive-500);
  line-height: 1.55;
}
.steps .step + .step::after {
  content: '';
  position: absolute;
  left: -14px;
  top: 48px;
  width: 8px;
  height: 1px;
  background: var(--color-passive-400);
}

.benefits {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-6);
  background: color-mix(in oklab, var(--color-passive-100) 80%, var(--bg-base));
  border-top: 1px solid color-mix(in oklab, var(--color-passive-300) 50%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--color-passive-300) 50%, transparent);
}

.benefits-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: color-mix(in oklab, var(--color-passive-300) 60%, transparent);
  border: 1px solid color-mix(in oklab, var(--color-passive-300) 60%, transparent);
  border-radius: var(--radius-xl);
  overflow: hidden;
  max-width: 1100px;
  margin: 0 auto;
}
.benefit {
  background: var(--bg-base);
  padding: clamp(var(--space-8), 4vw, var(--space-12)) var(--space-8) var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: relative;
  min-height: 280px;
}
.benefit-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  margin-bottom: var(--space-2);
  color: var(--color-passive-700);
}
.benefit-icon svg { width: 100%; height: 100%; }
.benefit h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  letter-spacing: -0.015em;
  color: var(--color-passive-800);
}
.benefit p {
  font-size: var(--text-sm);
  color: var(--color-passive-500);
  line-height: 1.6;
  max-width: 36ch;
}
.benefit .soon-tag {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--brand) 12%, var(--bg-base));
  color: var(--brand-deep);
  border: 1px solid color-mix(in oklab, var(--brand) 30%, transparent);
}

.faq {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) var(--space-6);
  background: var(--bg-base);
}
.faq-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: clamp(var(--space-12), 6vw, var(--space-20));
  max-width: 1100px;
  margin: 0 auto;
  align-items: start;
}
.faq-layout .section-head {
  margin: 0;
  text-align: left;
  position: sticky;
  top: calc(var(--nav-h) + var(--space-12));
}
.faq-layout .section-head .section-label::before { display: none; }
.faq-layout .section-head .section-label { margin-bottom: var(--space-4); }
.faq-layout .section-head h2 { font-size: var(--text-xl); }
.faq-layout .section-head p { font-size: var(--text-sm); color: var(--color-passive-500); }

.faq-list {
  list-style: none;
  border-top: 1px solid color-mix(in oklab, var(--color-passive-300) 60%, transparent);
}
.faq-item {
  border-bottom: 1px solid color-mix(in oklab, var(--color-passive-300) 60%, transparent);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-5) var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-passive-800);
  transition: color var(--t);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--brand-deep); }
.faq-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-left: auto;
  position: relative;
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  width: 12px; height: 1.5px;
  background: var(--color-passive-600);
  transform: translate(-50%, -50%);
  border-radius: 999px;
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); }

.faq-body {
  padding: 0 var(--space-2) var(--space-6) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-passive-500);
  line-height: 1.7;
  max-width: 60ch;
}
.faq-body a { color: var(--brand-deep); text-decoration: underline; text-underline-offset: 3px; }
.faq-body p + p { margin-top: var(--space-3); }

.faq-item[open] summary { color: var(--brand-deep); }

.finalizer {
  padding: 0 0 clamp(var(--space-20), 10vw, var(--space-32));
  padding-left: var(--space-6);
  padding-right: var(--space-6);
  background: var(--bg-base);
}
.finalizer-inner {
  position: relative;
  overflow: hidden;
  background: var(--color-passive-800);
  color: var(--color-passive-50);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-16), 8vw, var(--space-24));
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  isolation: isolate;
  max-width: var(--w-wide);
  margin: 0 auto;
}
.finalizer-orb {
  position: absolute;
  left: 50%;
  top: -240px;
  transform: translateX(-50%);
  width: 720px;
  height: 720px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    color-mix(in oklab, var(--brand) 80%, white) 0%,
    color-mix(in oklab, var(--brand) 70%, transparent) 30%,
    transparent 65%
  );
  filter: blur(40px);
  opacity: 0.45;
  z-index: -1;
  pointer-events: none;
  animation: orbFloat 14s ease-in-out infinite;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, 20px); }
}

.finalizer-inner h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
  color: var(--color-passive-50);
}
.finalizer-inner h2 em { color: color-mix(in oklab, var(--brand) 70%, white); }
.finalizer-inner > p {
  font-size: var(--text-base);
  color: color-mix(in oklab, var(--color-passive-50) 65%, transparent);
  max-width: 52ch;
}
.finalizer-inner .btn-primary {
  background: var(--color-passive-50);
  color: var(--color-passive-900);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.finalizer-inner .btn-primary:hover { background: #fff; }
.finalizer-inner .btn-ghost {
  color: color-mix(in oklab, var(--color-passive-50) 75%, transparent);
  border-color: color-mix(in oklab, var(--color-passive-50) 25%, transparent);
}
.finalizer-inner .btn-ghost:hover {
  color: var(--color-passive-50);
  background: color-mix(in oklab, var(--color-passive-50) 8%, transparent);
}
.finalizer-buttons {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
  margin-top: var(--space-3);
}

.site-footer {
  padding: var(--space-10) 0;
  background: var(--bg-base);
  border-top: 1px solid color-mix(in oklab, var(--color-passive-300) 50%, transparent);
}
.site-footer .container {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.logo-sm { font-size: var(--text-xs); }
.logo-sm span { font-size: var(--text-xs); }
.logo-sm .logo-emblem { width: 20px; height: 20px; }

.footer-links {
  display: flex;
  gap: var(--space-6);
  margin-left: auto;
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-passive-500);
  transition: color var(--t);
}
.footer-links a:hover { color: var(--color-passive-800); }

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-passive-400);
}

@media (max-width: 1024px) {
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps .step + .step::after { display: none; }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .faq-layout .section-head { position: static; }
}

@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }

  .phase-ribbon {
    grid-template-columns: repeat(5, minmax(120px, 1fr));
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    margin-inline: calc(var(--space-6) * -1);
    padding-inline: var(--space-6);
  }
  .phase-tab { scroll-snap-align: start; }
  .phase-stage { height: 320px; }
  .phase-stage-label {
    grid-template-columns: 1fr;
    text-align: left;
    gap: var(--space-3);
    padding: var(--space-6);
  }
  .phase-stage-tip { text-align: left; max-width: none; }

  .benefits-grid { grid-template-columns: 1fr; }

  .hero-horizon { width: 420px; height: 320px; }
  .hero-horizon .orb { width: 280px; height: 280px; }

  .site-footer .container {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
  .footer-links { margin-left: 0; }
}

@media (max-width: 480px) {
  .hero { min-height: 80vh; padding-block: var(--space-16); }
  .steps { grid-template-columns: 1fr; }
}