*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ══════════════════════════════════════════
   THEMES — three palettes from the color study
══════════════════════════════════════════ */

/* Red — cream paper + vivid red (default) */
[data-theme="red"] {
  --bg:         #EAE1D2;
  --bg-alt:     #DDD4C2;
  --fg:         #B90103;
  --fg-hi:      #950002;
  --fg-sub:     rgba(185, 1, 3, 0.40);
  --fg-muted:   rgba(185, 1, 3, 0.22);
  --fg-body:    rgba(185, 1, 3, 0.78);
  --rule:       rgba(185, 1, 3, 0.16);
  --rule-mid:   rgba(185, 1, 3, 0.30);
}

/* Blue — deep royal blue + cream */
[data-theme="blue"] {
  --bg:         #223488;
  --bg-alt:     #1a2870;
  --fg:         #EAE1D2;
  --fg-hi:      #F5F0E8;
  --fg-sub:     rgba(234, 225, 210, 0.42);
  --fg-muted:   rgba(234, 225, 210, 0.22);
  --fg-body:    rgba(234, 225, 210, 0.82);
  --rule:       rgba(234, 225, 210, 0.16);
  --rule-mid:   rgba(234, 225, 210, 0.30);
}

/* Ink — cream paper + near-black dark red */
[data-theme="ink"] {
  --bg:         #EAE1D2;
  --bg-alt:     #DDD4C2;
  --fg:         #1D0203;
  --fg-hi:      #6C1408;
  --fg-sub:     rgba(138, 30, 16, 0.40);
  --fg-muted:   rgba(138, 30, 16, 0.22);
  --fg-body:    rgba(138, 30, 16, 0.80);
  --rule:       rgba(29, 2, 3, 0.14);
  --rule-mid:   rgba(29, 2, 3, 0.28);
}

:root {
  --header-h:  44px;
  --strip-h:   56px;
  --f-display: 'Helvetica Neue', Helvetica, 'Barlow', Arial, sans-serif;
  --f-body:    'Helvetica Neue', Helvetica, 'Inter', Arial, sans-serif;
}

/* Uppercase toggle */
html.uppercase .strip__name,
html.uppercase .intro__cover-title,
html.uppercase .sect-title {
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

html, body {
  height: 100%;
  overflow: hidden;
}
body {
  font-family: var(--f-body);
  background: var(--bg);
  color: var(--fg);
  transition: background 0.45s ease, color 0.45s ease;
}

/* ══════════════════════════════════════════
   GRAIN TEXTURE
══════════════════════════════════════════ */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
  opacity: 0.18;
  mix-blend-mode: overlay;
}

/* ══════════════════════════════════════════
   PERSISTENT HEADER
══════════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  background: transparent;
  border-bottom: 1px solid var(--rule);
  transition: border-color 0.45s ease, opacity 0.4s ease;
}
.site-header.cover-mode {
  display: none;
}

.site-header__logo {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fg);
  opacity: 0.65;
}

.site-header__right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-header__nav-btn {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: none;
  border: none;
  color: var(--fg);
  opacity: 0.45;
  cursor: pointer;
  transition: opacity 0.2s;
}
.site-header__nav-btn:hover { opacity: 1; }

/* Theme switcher — 3 small dots */
.theme-switcher {
  display: flex;
  gap: 8px;
  align-items: center;
}
.tsw-btn {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.5px solid var(--fg);
  cursor: pointer;
  padding: 0;
  background: transparent;
  opacity: 0.28;
  transition: opacity 0.2s, background 0.2s;
  flex-shrink: 0;
}
.tsw-btn:hover { opacity: 0.6; }
.tsw-btn.active {
  opacity: 1;
  background: var(--fg);
}

.site-header__case-btn {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  background: none;
  border: 1px solid var(--fg);
  border-radius: 3px;
  color: var(--fg);
  padding: 3px 7px;
  cursor: pointer;
  opacity: 0.35;
  transition: opacity 0.2s;
}
.site-header__case-btn:hover   { opacity: 0.75; }
.site-header__case-btn.active  { opacity: 1; background: var(--fg); color: var(--bg); }

/* ══════════════════════════════════════════
   PAGE STACK
══════════════════════════════════════════ */
.page-stack {
  position: fixed;
  inset: 0;
  top: var(--header-h);
  overflow: hidden;
}

.page {
  position: absolute;
  inset: 0;
  transition: transform 0.58s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}
.page--active { transform: translateY(0);    pointer-events: auto; }
.page--above  { transform: translateY(-100%); pointer-events: none; }
.page--below  { transform: translateY(100%);  pointer-events: none; }

/* ══════════════════════════════════════════
   INTRO PAGE — full-bleed scroll reveal
══════════════════════════════════════════ */

/* Flush page-stack to top when header is hidden */
.page-stack.no-header { top: 0; }

/* Intro page scrolls */
#pageIntro { overflow-y: auto; }

.intro { display: block; }

/* Sticky full-screen photo */
.intro__photo {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  background: #0A1018;
}
.intro__photo-bg {
  position: absolute;
  inset: 0;
  background: #0D0B08;
}
.intro__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 1.4s ease;
}
.intro__slide--a { opacity: 1; }
.intro__slide--b { opacity: 0; }
.intro__photo-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8,6,4,0.55) 0%, transparent 45%);
}
.intro__photo-content {
  position: relative;
  z-index: 4;
  height: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-end;
  padding: 28px 32px 80px;
}
.intro__cover-title,
.intro__cover-label {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1;
  color: #BF6B18;
  white-space: nowrap;
}

/* Scroll cue — animated line mid-bottom of photo */
.intro__scroll-cue {
  position: absolute;
  bottom: 52px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}
.intro__scroll-cue__line {
  width: 1px;
  height: 36px;
  background: #BF6B18;
  display: block;
  transform-origin: top;
  animation: scrollCueDrop 2.2s ease-in-out infinite;
}
@keyframes scrollCueDrop {
  0%   { transform: scaleY(0); opacity: 0; transform-origin: top; }
  35%  { transform: scaleY(1); opacity: 0.55; transform-origin: top; }
  36%  { transform-origin: bottom; }
  70%  { transform: scaleY(0); opacity: 0; transform-origin: bottom; }
  100% { transform: scaleY(0); opacity: 0; transform-origin: bottom; }
}

/* Text panel — slides up over the photo */
.intro__panel {
  position: relative;
  z-index: 2;
  background: var(--bg);
  border-radius: 20px 20px 0 0;
  margin-top: -56px;
  padding: 64px 72px 100px;
  min-height: 100svh;
  transition: background 0.45s ease;
}

/* Welcome header — animated in with bounce */
.intro__welcome-head {
  font-family: var(--f-display);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--fg);
  margin-bottom: 20px;
}
.intro__panel-body {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.85;
  color: var(--fg-body);
  margin-bottom: 14px;
}
.intro__panel-sig {
  font-size: 13px;
  margin-top: 28px;
  line-height: 1.65;
  color: var(--fg);
  opacity: 0.55;
}
.intro__cta {
  margin-top: 52px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg);
  background: none;
  border: none;
  border-bottom: 2px solid var(--rule-mid);
  padding-bottom: 6px;
  cursor: pointer;
  opacity: 0.9;
  transition: opacity 0.2s, border-color 0.2s;
  align-self: flex-start;
}
.intro__cta:hover { opacity: 1; border-color: var(--fg); }
.intro__read-more {
  display: block;
  margin-top: 20px;
  font-family: var(--f-body);
  font-size: 12px;
  font-weight: 400;
  color: var(--fg-sub);
  text-decoration: none;
  transition: color 0.2s;
}
.intro__read-more:hover { color: var(--fg-body); }

/* ─── Scroll-reveal animations ──────────────────────── */
@keyframes introHeadBounce {
  0%   { opacity: 0; transform: translateY(32px); }
  55%  { opacity: 1; transform: translateY(-7px); }
  75%  { transform: translateY(3px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes introFadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.anim-item { opacity: 0; }
.anim-item.anim-visible.anim-head {
  animation: introHeadBounce 0.8s cubic-bezier(0.34, 1.3, 0.64, 1) forwards;
}
.anim-item.anim-visible.anim-body {
  animation: introFadeUp 0.6s ease forwards;
  animation-delay: calc(var(--i, 0) * 0.09s + 0.1s);
}

/* ══════════════════════════════════════════
   HUB PAGE — monochromatic row layout
══════════════════════════════════════════ */
.page--hub {
  background: var(--bg);
  overflow-y: auto;
  transition: background 0.45s ease;
}

.hub__label {
  padding: 20px 48px 10px;
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fg);
  opacity: 0.2;
  border-bottom: 1px solid var(--rule);
}

/* ── Strip rows — no background color, just rules ── */
.strip {
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  transition: border-color 0.45s ease;
}

.strip__head {
  display: flex;
  align-items: center;
  height: var(--strip-h);
  padding: 0 48px;
  gap: 20px;
  transition: opacity 0.15s;
}
.strip:hover .strip__head { opacity: 0.55; }

.strip__n {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--fg-sub);
  width: 28px;
  flex-shrink: 0;
}

.strip__name {
  font-family: var(--f-display);
  font-size: clamp(26px, 3.8vw, 48px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1;
  flex: 1;
  color: var(--fg);
}

/* Link strip — navigates to a separate page, no accordion */
.strip--link { cursor: pointer; }
.strip--link .strip__head { border-bottom: none; }
.strip__icon--arrow {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.2s ease;
}
.strip--link:hover .strip__icon--arrow { transform: translateX(4px); }

/* Chevron — rotates when strip opens */
.strip__icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-sub);
  flex-shrink: 0;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), color 0.45s ease;
}
.strip__icon svg { width: 12px; height: 8px; }
.strip.open .strip__icon { transform: rotate(180deg); }

/* Accordion body */
.strip__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.42s cubic-bezier(0.4, 0, 0.2, 1);
}
.strip.open .strip__body { grid-template-rows: 1fr; }
.strip__body-inner { overflow: hidden; }

/* Sub-item list */
.sublist {
  padding: 0 48px 0 96px;
}

.sub {
  border-top: 1px solid var(--rule);
}

.sub__row {
  display: flex;
  align-items: center;
  padding: 15px 0;
  gap: 14px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.sub__row:hover { opacity: 0.5; }

.sub__n {
  font-family: var(--f-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-sub);
  width: 28px;
  flex-shrink: 0;
}

.sub__title {
  font-family: var(--f-display);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--fg);
  flex: 1;
}

.sub__badge {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-sub);
  flex-shrink: 0;
}

/* Inline expand panel */
.sub__panel-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.sub.open .sub__panel-wrap { grid-template-rows: 1fr; }
.sub__panel-inner { overflow: hidden; }

.sub__panel {
  padding: 2px 0 20px 42px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--fg-body);
  max-width: 520px;
}
.sub__panel p { margin-bottom: 8px; }
.sub__panel p:last-child { margin-bottom: 0; }

.sub__img {
  display: block;
  width: 100%;
  max-width: 480px;
  margin-top: 16px;
  border-radius: 4px;
}

.step__img {
  display: block;
  width: 100%;
  max-width: 480px;
  margin-top: 16px;
  border-radius: 4px;
}

.sect-intro__img {
  display: block;
  width: 100%;
  max-width: 480px;
  margin: 16px 0;
  border-radius: 4px;
}

.sect-outro {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

/* Guide link — links out to standalone listening guide */
.sect-guide-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-decoration: none;
  padding: 4px 0;
}
.sect-guide-link__label {
  font-family: var(--f-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg);
}
.sect-guide-link__hint {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-sub);
}
.sect-guide-link:hover .sect-guide-link__label,
.sect-guide-link:hover .sect-guide-link__hint { opacity: 0.55; }

.sect-outro__img {
  display: block;
  width: 120px;
  margin-top: 16px;
  border-radius: 4px;
}

/* ─── LISTENING ROOM SECTION ─────────────────────────────────────────────── */

.sect-intro__h3 {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg);
  margin-top: 36px;
  margin-bottom: 14px;
  padding-top: 28px;
  border-top: 1px solid var(--rule-mid);
}

/* Two-systems comparison grid */
.lr-system-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--rule-mid);
  margin-top: 16px;
  margin-bottom: 16px;
}
.lr-system-card {
  padding: 18px 20px;
}
.lr-system-card + .lr-system-card {
  border-left: 1px solid var(--rule-mid);
}
.lr-system-badge {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-sub);
  margin-bottom: 8px;
}
.lr-system-badge--adv {
  color: var(--fg);
  opacity: 0.7;
}
.lr-system-name {
  font-family: var(--f-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
  line-height: 1.2;
}
.lr-system-desc {
  font-family: var(--f-body);
  font-size: 12px;
  line-height: 1.7;
  color: var(--fg-body);
  margin-bottom: 12px;
}
.lr-system-meta {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.lr-system-meta span {
  font-family: var(--f-body);
  font-size: 11px;
  color: var(--fg-sub);
  line-height: 1.5;
}

/* Hi-Fi access note */
.lr-note {
  margin-top: 16px;
  margin-bottom: 4px;
  padding: 16px 20px;
  border-left: 2px solid var(--fg);
  background: var(--bg-alt);
}
.lr-note p {
  font-family: var(--f-body);
  font-size: 12px;
  line-height: 1.75;
  color: var(--fg-body);
  margin: 0;
}

/* iPad control grid */
.lr-control-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--rule-mid);
  margin-top: 16px;
}
.lr-control-item {
  padding: 14px 18px;
  border-right: 1px solid var(--rule-mid);
  border-bottom: 1px solid var(--rule-mid);
}
.lr-control-item:nth-child(even) { border-right: none; }
.lr-control-item:nth-last-child(-n+2) { border-bottom: none; }
.lr-ctrl-label {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg);
  margin-bottom: 5px;
}
.lr-ctrl-desc {
  font-family: var(--f-body);
  font-size: 11px;
  line-height: 1.6;
  color: var(--fg-sub);
}

@media (max-width: 520px) {
  .lr-system-grid,
  .lr-control-grid { grid-template-columns: 1fr; }
  .lr-system-card + .lr-system-card {
    border-left: none;
    border-top: 1px solid var(--rule-mid);
  }
  .lr-control-item { border-right: none; }
  .lr-control-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--rule-mid); }
  .lr-control-item:last-child { border-bottom: none; }
}

/* Quick Start steps inside panel */
.lr-quick-step {
  padding: 11px 0;
  border-top: 1px solid var(--rule);
}
.lr-quick-step:first-child { border-top: none; }
.lr-qs-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}
.lr-qs-num {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 700;
  color: var(--fg);
  min-width: 14px;
  flex-shrink: 0;
}
.lr-qs-title {
  font-family: var(--f-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fg);
}
.lr-qs-body {
  font-family: var(--f-body);
  font-size: 12px;
  line-height: 1.7;
  color: var(--fg-body);
  margin: 0;
}
.lr-qs-note {
  font-family: var(--f-body);
  font-size: 11px;
  line-height: 1.65;
  color: var(--fg-sub);
  margin-top: 6px;
}

/* Activity button images in Quick Start */
.lr-btn-imgs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}
.lr-btn-img {
  display: block;
  width: 100%;
  max-width: 300px;
}

/* Passcode / info note inside sub panels */
.sub__panel-note {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--fg);
  background: var(--bg-alt);
  border-left: 2px solid var(--fg-sub);
  padding: 8px 12px;
  margin-bottom: 12px;
  border-radius: 2px;
}

/* Parts diagram: image left, labels right */
.sub__diagram {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-top: 16px;
  margin-bottom: 8px;
}
.sub__diagram-img {
  display: block;
  width: 52%;
  flex-shrink: 0;
  border-radius: 4px;
}
.sub__diagram-labels {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 12px;
  line-height: 2;
  color: var(--fg-body);
}
.sub__diagram-labels li strong {
  font-weight: 700;
  margin-right: 6px;
  color: var(--fg);
}

/* Image with extra bottom margin (e.g. before a section heading) */
.sub__img--spaced {
  margin-bottom: 20px;
}

/* Gather Your Tools two-row layout */
.sub__toolbox {
  margin: 10px 0 14px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.sub__tool-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}
.sub__tool-row:last-child { border-bottom: none; }
.sub__tool-label {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  padding-top: 2px;
}
.sub__tool-items {
  font-size: 12px;
  line-height: 1.7;
  color: var(--fg-body);
}

.sub__guide-link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg);
  cursor: pointer;
}

.info-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--rule-mid);
}
.info-field__lbl {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-sub);
  margin-bottom: 4px;
}
.info-field__val {
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}

/* ══════════════════════════════════════════
   SECTION VIEW
══════════════════════════════════════════ */
.sect-view {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.48s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}
.sect-view.open { transform: translateX(0); }

/* Section main content */
.sect-main {
  flex: 1;
  overflow-y: auto;
  background: var(--bg);
  transition: background 0.45s ease;
}

.sect-back {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 48px;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-sub);
  transition: color 0.2s, background 0.45s ease;
  user-select: none;
}
.sect-back:hover { color: var(--fg); }

.sect-content {
  padding: 32px 40px 80px;
  max-width: 680px;
}

.sect-eyebrow {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fg-sub);
  margin-bottom: 8px;
}

.sect-title {
  font-family: var(--f-display);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 10px;
}

.sect-intro {
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  margin-bottom: 32px;
}
.sect-intro p {
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--fg);
  max-width: 520px;
  margin-bottom: 14px;
}
.sect-intro p:last-child { margin-bottom: 0; }

/* Video callout — light theme card */
.sect-video-block {
  margin-top: 36px;
  padding: 24px;
  background: var(--rule);
  border-radius: 6px;
}
.sect-video-label {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-sub);
  margin-bottom: 10px;
}
.sect-video-desc {
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.75;
  color: var(--fg-body);
  max-width: 480px;
  margin-bottom: 14px;
}
.sect-video-link {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: opacity 0.15s;
}
.sect-video-link:hover { opacity: 0.65; text-decoration: none; }

/* Steps section label */
.sect-steps-label {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fg-sub);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
}

/* Section jump nav */
.sect-nav {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 8px 0 10px;
  margin-bottom: 4px;
  z-index: 10;
}
.sect-nav + .sect-section-label { margin-top: 16px; }
.sect-nav__btn {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg);
  background: none;
  border: 1px solid var(--rule-mid);
  border-radius: 3px;
  padding: 6px 14px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.sect-nav__btn:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* Multi-section label (Heat the Hot Tub / Soaking & Closing Up) */
.sect-section-label {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fg-sub);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 0;
  margin-top: 40px;
}
.sect-section-label:first-child { margin-top: 0; }

/* Captioned image (e.g. intake states in hot tub) */
.step__captioned-img {
  margin-top: 16px;
}
.step__captioned-img .step__img {
  margin-top: 0;
}
.step__caption {
  font-family: var(--f-body);
  font-size: 11px;
  color: var(--fg-body);
  margin-top: 6px;
  font-style: italic;
}

/* Direct-expand strip panel (no sub-accordion, e.g. Hot Tub) */
.strip__inline-panel {
  padding: 0 180px 24px 96px;
  border-top: 1px solid var(--rule);
}

/* Static title at top of strip direct-expand panel */
.strip__panel-title {
  font-family: var(--f-display);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--fg);
  padding: 10px 0 10px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 14px;
}

/* Section note callout (e.g. circulation note) */
.sect-note {
  margin-top: 24px;
  padding: 18px 20px;
  background: var(--rule);
  border-radius: 6px;
}
.sect-note p {
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.75;
  color: var(--fg-body);
}
.sect-note .step__img {
  margin-top: 14px;
}

/* Pink accordion callout (e.g. High Wind Conditions) */
.callout-acc {
  border-top: 1px solid var(--rule);
  margin-top: 0;
  cursor: pointer;
  user-select: none;
}
.callout-acc__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.callout-acc__label {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg);
}
.callout-acc__chevron {
  color: var(--fg-sub);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.callout-acc.open .callout-acc__chevron { transform: rotate(180deg); }
.callout-acc__wrap {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}
.callout-acc.open .callout-acc__wrap { grid-template-rows: 1fr; }
.callout-acc__inner {
  min-height: 0;
}
.callout-acc__content {
  padding: 16px 20px 20px;
  background: var(--rule);
  border-radius: 6px;
  margin-bottom: 8px;
}
.callout-acc__content p {
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.75;
  color: var(--fg-body);
  margin-bottom: 6px;
}
.callout-acc__content p:last-child { margin-bottom: 0; }

/* Video link inside a step (N.7 Further Assistance) */
.step__video-card {
  margin-top: 20px;
  padding: 18px 20px;
  background: #5A0A0A;
  border-radius: 6px;
}
.step__video-link {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(234, 225, 210, 0.90);
  text-decoration: none;
  transition: opacity 0.15s;
}
.step__video-link:hover { opacity: 0.65; }

/* Standalone red-bg callout card (e.g. wind warning) */
.step__callout {
  margin: 28px 0;
  padding: 20px 24px;
  background: #5A0A0A;
  border-radius: 6px;
  color: rgba(234, 225, 210, 0.90);
}
.step__callout-label {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(234, 225, 210, 0.55);
  margin-bottom: 10px;
}
.step__callout p {
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(234, 225, 210, 0.90);
  margin-bottom: 6px;
}
.step__callout p:last-child { margin-bottom: 0; }

/* Steps — accordion */
.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 0;
  border-top: 1px solid var(--rule);
  cursor: pointer;
}

.step__n {
  font-family: var(--f-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-sub);
  padding-top: 26px;
}

.step__main { padding: 22px 0; }

.step__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.step__title {
  font-family: var(--f-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.step__chevron {
  flex-shrink: 0;
  width: 16px;
  color: var(--fg-sub);
  transition: transform 0.3s ease;
}
.step__chevron svg { display: block; width: 100%; }
.step.open .step__chevron { transform: rotate(180deg); }

.step__body-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.32s ease;
}
.step.open .step__body-wrap { grid-template-rows: 1fr; }
.step__body-inner { overflow: hidden; }

.step__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg-body);
  padding-top: 12px;
}
.step__body p { margin-bottom: 8px; }
.step__body p:last-child { margin-bottom: 0; }

.step__sub {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.step__sub-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-sub);
  margin-bottom: 10px;
}

.note {
  margin-top: 12px;
  padding: 12px 16px;
  border-left: 2px solid var(--fg-sub);
  font-size: 13px;
  line-height: 1.68;
  color: var(--fg-body);
}

/* Deep dive */
.deep-dive {
  margin-top: 36px;
  border-top: 1px solid var(--rule-mid);
  padding-top: 24px;
}

.deep-dive__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  gap: 16px;
  padding-bottom: 4px;
}

.deep-dive__label {
  font-family: var(--f-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg);
}

.deep-dive__hint {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-sub);
}

.deep-dive__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.38s cubic-bezier(0.4, 0, 0.2, 1);
}
.deep-dive.open .deep-dive__body { grid-template-rows: 1fr; }
.deep-dive__body-inner { overflow: hidden; }
.deep-dive__intro {
  font-size: 14px;
  line-height: 1.75;
  color: var(--fg-body);
  padding: 16px 0 8px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4px;
}

/* ══════════════════════════════════════════
   HUB FOOTER — Emergency (left) + Checkout (right)
══════════════════════════════════════════ */
.hub-footer {
  display: flex;
  align-items: stretch;
  border-top: 1px solid var(--rule-mid);
  background: var(--bg-alt);
  transition: background 0.45s ease;
}

.hub-footer__emergency {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px 28px 18px 48px;
  background: none;
  border: none;
  border-right: 1px solid var(--rule);
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-sub);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.45s ease;
  flex-shrink: 0;
}
.hub-footer__emergency:hover { color: var(--fg); }
.hub-footer__emergency::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.7;
  flex-shrink: 0;
}

.checkout-mini {
  flex: 1;
  transition: background 0.45s ease;
}

.checkout-mini__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px 18px 28px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-sub);
  transition: color 0.2s;
  gap: 12px;
}
.checkout-mini__toggle:hover { color: var(--fg); }

.checkout-mini__chevron {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  opacity: 0.5;
}
.checkout-mini.open .checkout-mini__chevron { transform: rotate(180deg); }

.checkout-mini__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.checkout-mini.open .checkout-mini__body { grid-template-rows: 1fr; }
.checkout-mini__body-inner { overflow: hidden; }

.checkout-mini__inner {
  padding: 0 48px 22px 28px;
  border-top: 1px solid var(--rule);
}

.checkout-mini__time {
  font-family: var(--f-display);
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 18px 0 14px;
}

.checkout-mini__list { list-style: none; }
.checkout-mini__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--fg-body);
  line-height: 1.55;
}
.checkout-mini__list li::before {
  content: '—';
  font-size: 10px;
  color: var(--fg-muted);
  flex-shrink: 0;
}

.checkout-mini__footer {
  padding: 16px 48px 22px 28px;
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
  text-align: center;
  border-top: 1px solid var(--rule);
}

/* ══════════════════════════════════════════
   EMERGENCY VIEW — inverted colors, slides in from right
══════════════════════════════════════════ */
.emergency-view {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  z-index: 300;
  background: var(--fg);
  color: var(--bg);
  transform: translateX(100%);
  transition: transform 0.48s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  overflow-y: auto;
}
.emergency-view.open { transform: translateX(0); }

.emrg-back {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 48px;
  background: var(--fg);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  cursor: pointer;
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.55;
  transition: opacity 0.2s;
  user-select: none;
}
.emrg-back:hover { opacity: 1; }

.emrg-content {
  padding: 48px 48px 80px;
  max-width: 780px;
}

.emrg-eyebrow {
  font-family: var(--f-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.45;
  margin-bottom: 12px;
}

.emrg-title {
  font-family: var(--f-display);
  font-size: clamp(52px, 8vw, 104px);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 0.9;
  color: var(--bg);
  margin-bottom: 48px;
}

.emrg-rule { border: none; border-top: 1px solid rgba(255,255,255,0.14); margin: 0; }

.emrg-block {
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.14);
}

.emrg-block__label {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.45;
  margin-bottom: 10px;
}

.emrg-block__primary {
  font-family: var(--f-display);
  font-size: clamp(22px, 3.5vw, 36px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--bg);
  margin-bottom: 6px;
}

.emrg-block__primary a {
  color: inherit;
  text-decoration: none;
}
.emrg-block__primary a:hover { opacity: 0.7; }

.emrg-block__detail {
  font-size: 13px;
  line-height: 1.7;
  color: var(--bg);
  opacity: 0.6;
}
.emrg-block__detail a {
  color: inherit;
  opacity: 1;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.emrg-address {
  margin-top: 32px;
  padding: 18px 20px;
  border: 1px solid rgba(255,255,255,0.18);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.emrg-address__lbl {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.45;
}
.emrg-address__val {
  font-size: 15px;
  font-weight: 500;
  color: var(--bg);
  line-height: 1.4;
}

.emrg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.12);
  margin-top: 8px;
}
.emrg-grid__cell {
  padding: 16px 18px;
  background: var(--fg);
}
.emrg-grid__lbl {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bg);
  opacity: 0.42;
  margin-bottom: 5px;
}
.emrg-grid__val {
  font-size: 13px;
  font-weight: 500;
  color: var(--bg);
  line-height: 1.5;
}

/* ══════════════════════════════════════════
   PIZZA SAFETY GATE
══════════════════════════════════════════ */
.pizza-safety-view {
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  z-index: 250;
  background: #B90103;
  color: #EAE1D2;
  transform: translateX(100%);
  transition: transform 0.48s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.pizza-safety-view.open { transform: translateX(0); }

.pizza-safety-back {
  display: flex;
  align-items: center;
  gap: 8px;
  position: sticky;
  top: 0;
  padding: 12px 48px;
  background: #B90103;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(234,225,210,0.7);
  cursor: pointer;
  border-bottom: 1px solid rgba(234,225,210,0.15);
  z-index: 1;
}
.pizza-safety-back svg { width: 8px; height: 14px; }
.pizza-safety-back:hover { color: #EAE1D2; }

.pizza-safety-inner {
  padding: 48px 48px 80px;
  max-width: 860px;
}

.pizza-safety-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(234,225,210,0.6);
  margin-bottom: 16px;
}

.pizza-safety-title {
  font-family: var(--f-display);
  font-size: clamp(52px, 8vw, 104px);
  font-weight: 400;
  line-height: 0.92;
  color: #EAE1D2;
  margin-bottom: 48px;
}

.pizza-safety-rules {
  border-top: 1px solid rgba(234,225,210,0.25);
  padding-top: 32px;
  margin-bottom: 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.pizza-safety-rules p {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(234,225,210,0.88);
}
.pizza-safety-rules strong { color: #EAE1D2; }

.pizza-safety-gate {
  border-top: 1px solid rgba(234,225,210,0.25);
  padding-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pizza-safety-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  font-size: 15px;
  color: #EAE1D2;
  line-height: 1.5;
}
.pizza-safety-check input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: #EAE1D2;
  cursor: pointer;
}

.pizza-safety-btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  background: #EAE1D2;
  color: #B90103;
  border: none;
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.2s;
  align-self: flex-start;
}
.pizza-safety-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.pizza-safety-btn:not(:disabled):hover { opacity: 0.88; }

@media (max-width: 768px) {
  .pizza-safety-back { padding: 12px 24px; }
  .pizza-safety-inner { padding: 36px 28px 60px; }
  .pizza-safety-title { font-size: clamp(44px, 11vw, 80px); }
}

/* ══════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════ */
@media (max-width: 768px) {
  .intro__panel { padding: 40px 28px 80px; border-radius: 16px 16px 0 0; }
  .site-header { padding: 0 20px; }
  .hub__label { padding: 16px 24px 10px; }
  .strip__head { padding-left: 24px; padding-right: 24px; }
  .sublist { padding-left: 52px; padding-right: 12px; }
  .strip__inline-panel { padding-left: 52px; padding-right: 12px; }
  .step { grid-template-columns: 36px 1fr; gap: 10px; }
  .step__n { padding-top: 22px; }
  .sect-content { padding: 24px 20px 60px; }
  .sect-back { padding: 12px 24px; }
  .hub-footer__emergency { padding-left: 24px; padding-right: 16px; }
  .checkout-mini__toggle { padding-left: 16px; padding-right: 24px; }
  .checkout-mini__inner { padding-left: 16px; padding-right: 24px; }
  .checkout-mini__footer { padding-left: 16px; padding-right: 24px; }
  .emrg-content { padding: 36px 28px 60px; }
  .emrg-back { padding: 12px 24px; }
  .emrg-grid { grid-template-columns: 1fr; }
}