/* Final presentation rhythm. The existing artwork and palette remain the source. */
:root {
  --type-display: clamp(36px, 5vw, 68px);
  --type-h1: clamp(62px, 6.45vw, 91px);
  --type-h2: clamp(42px, 5.25vw, 72px);
  --type-h3: clamp(24px, 2.5vw, 34px);
  --type-body-large: 16px;
  --type-body: 14px;
  --type-caption: 12px;
  --type-label: 12px;
  --type-microcopy: 11px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --section-space: clamp(72px, 8vw, 112px);
  --motion-micro: 180ms;
  --motion-component: 320ms;
  --motion-entrance: 500ms;
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ink-secondary: #a4acb5;
  --ink-caption: #91a1ae;
}

/* A native font stack has no network-dependent font swap. */
.hero-opening-pending .hero-field-stage { opacity: 0; }
/* Reserve Replay before enhancement arrives, including failed-load entries. */
.hero-replay[hidden] { display: block; visibility: hidden; pointer-events: none; }
.hero h1 { font-size: var(--type-h1); }
.nav-brand-name::after { display: none; }
h2, .faq-section h2 { font-size: var(--type-h2); }
.closing h2 { font-size: var(--type-display); }
.day-execute-column h3, .day-download h3 { font-size: var(--type-h3); }
.day-adjustment h3 {
  font-size: 24px;
  letter-spacing: -.035em;
  line-height: 1.2;
  margin: 0 0 var(--space-2);
}
.hero-description { font-size: var(--type-body-large); }
.day-intro-note, .training-intro > p:not(.section-kicker),
.day-execute-column [role="tabpanel"] > p:not(.day-time,.day-action-note),
.review-output p, .faq-list details p, .day-adjustment > p:not(.day-time,.day-action-note) {
  font-size: var(--type-body);
  line-height: 1.8;
}
.section-kicker, .intro-line, .day-system-steps, .region-buttons button,
.navigation nav, .nav-download {
  font-size: var(--type-label);
}
.day-plan-note, .day-receipt, .day-action-note, .day-time,
.day-workout-sets li, .evidence-disclosure, .evidence-record p,
.map-note, .day-download p, .day-region-delta, .platform-note,
.hero-replay, .motion-toggle, .anatomy-replay, .day-plan-list small {
  font-size: var(--type-caption);
}
.day-product figcaption, .day-example-label, .evidence-example,
.evidence-metrics dt, .evidence-trend-label, .evidence-trend-end,
.region-evidence .evidence-source, .day-stat-facts dt,
.evidence-detail-note, .day-source-note, .example-tag,
.review-label .example-tag, .evidence-list small, .anatomy-caption, .footer nav, .footer > p {
  font-size: var(--type-microcopy);
  color: var(--ink-caption);
}
.day-duration strong, .day-plan-list time, .day-workout-sets,
.day-stat-facts dd { font-variant-numeric: tabular-nums; }

/* Compress the connective passages; let the two visual anchors breathe. */
.section { padding-block: var(--section-space); }
.day-intro { margin-bottom: var(--space-6); }
.day-system-copy { padding-block: var(--space-3); }
.day-intro-note { max-width: 400px; }
/* Fit the entire device, caption and entrance travel below the fixed nav.
   Reserve room to read alongside it before the next section takes over. */
.connected-day {
  --day-preview-top: 114px;
  --day-preview-reserve: 230px;
  scroll-margin-top: calc(12px - var(--section-space));
}
.day-product { gap: 18px; }
.day-product figcaption { margin: 0; text-align: center; }
.day-phone {
  max-width: min(100%, calc((100svh - var(--day-preview-reserve)) * 430 / 932 + 16px));
  border-radius: 14% / 6.5%;
}
.day-phone-display { border-radius: 13.5% / 6.2%; }
@media (min-width: 761px) {
  .day-intro { min-height: calc(100svh - var(--day-preview-top) + 160px); }
  .day-product { position: sticky; top: var(--day-preview-top); align-self: start; }
}
.day-workspace { gap: 7%; }
#example-actions { scroll-margin-top: 20px; }
.review-section .section-heading { margin-bottom: var(--space-6); }
.review-principle { margin-top: var(--space-5); }
.day-download { margin-top: var(--space-5); padding-top: var(--space-4); }
.faq-section { padding-block: clamp(64px, 6.5vw, 96px); }
.closing { padding-block: var(--space-6) var(--section-space); }

/* The body's controls and evidence follow the same reading and focus order. */
.training-layout {
  grid-template-areas: "intro body" "evidence body";
  grid-template-columns: 1fr 1fr;
  column-gap: 10%;
  row-gap: 0;
  align-items: start;
}
.training-intro { grid-area: intro; }
.training-intro > p:not(.section-kicker) {
  max-width: 380px;
  margin-top: var(--space-3);
}
.training-copy { grid-area: evidence; }
.anatomy-stage { grid-area: body; align-self: center; }
/* A closing signature: reserve its space, even for selections without a line. */
.anatomy-caption.anatomy-caption--signature {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 44px;
  margin-top: 24px;
  font-size: clamp(16px, 1.35vw, 19px);
  font-weight: 450;
  line-height: 1.4;
  letter-spacing: -.015em;
  color: #b6d6e6;
  text-shadow: 0 0 18px #78cfff18;
  text-align: center;
}
.anatomy-signature-content { display: inline-flex; align-items: center; gap: 8px; }
.anatomy-signature-text { white-space: nowrap; }
.anatomy-signature-particles {
  position: absolute;
  pointer-events: none;
  width: 100%; height: 96px;
  left: 0; top: 50%; transform: translateY(-50%);
}
.anatomy-caption[data-signature="empty"] { visibility: hidden; }
.anatomy-caption:not([data-signature="wings"]) .anatomy-wing-button { display: none; }
.anatomy-wing-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.anatomy-wing-button:disabled { cursor: default; }
.anatomy-wing-button:focus-visible { outline: 1px solid #a5e6ff99; outline-offset: 3px; }
.anatomy-wing-button:not(:disabled):is(:hover, :active, :focus-visible) .anatomy-caption-wing {
  stroke: #d6f5ff;
  filter: drop-shadow(0 0 7px #78cfff70);
}
.anatomy-caption-wing {
  flex: 0 0 auto;
  width: clamp(32px, 2.8vw, 40px);
  height: auto;
  stroke: #99cce8;
  stroke-width: 1;
  stroke-linecap: round;
  opacity: .45;
}
.anatomy-caption-wing {
  overflow: visible;
  transform: translate(var(--wing-shift, 0px), var(--wing-lift, 0px)) scale(var(--wing-scale, 1));
  filter: drop-shadow(0 0 var(--wing-glow, 5px) #78cfff40);
}
.anatomy-caption-wing path { transform-origin: 40px 22px; }
.anatomy-caption-wing--right {
  transform: translate(calc(-1 * var(--wing-shift, 0px)), var(--wing-lift, 0px)) scaleX(-1) scale(var(--wing-scale, 1));
}
.anatomy-toolbar[hidden] { display: flex; visibility: hidden; }
.anatomy-static-links { position: absolute; top: 100%; inset-inline: 0; margin-top: 12px; }
.training-copy .region-buttons { margin-top: var(--space-3); }
.region-evidence { margin-top: var(--space-2); padding-top: var(--space-3); }
.anatomy-theater { min-height: 680px; }

/* Both panels contribute their intrinsic height. Hidden panels remain inert
   through visibility, so switching tabs never moves the next section. */
.day-execute-column { display: grid; grid-template-rows: auto 1fr; min-width: 0; }
.day-execute-tabs { grid-area: 1 / 1; margin-bottom: var(--space-3); }
.day-execute-column [role="tabpanel"] { grid-area: 2 / 1; align-self: start; min-width: 0; }
.connected-day .day-execute-column [role="tabpanel"][hidden] {
  display: block !important;
  visibility: hidden;
  pointer-events: none;
}
.day-execute-column #day-continue-workout,
.day-execute-column #day-see-training { min-height: 44px; }
.connected-day #day-continue-workout[hidden],
.connected-day #day-see-training[hidden] {
  display: inline-flex !important;
  visibility: hidden;
  pointer-events: none;
}
.day-receipt { min-height: 94px; }
.day-workout-sets li { min-height: 36px; }
.day-workout-sets li span:last-child { white-space: nowrap; }
.day-understand .day-complete { margin-top: var(--space-3); }

/* Quiet, consistent feedback with a full touch target even on text actions. */
.navigation { transition-duration: var(--motion-component); }
.navigation.scrolled { backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.navigation nav a, .nav-download, .footer nav a, .text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.nav-download { padding-block: 10px; }
.navigation nav a, .footer nav a { min-width: 44px; }
.hero-bottom > a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; }
.motion-toggle, .footer .wordmark { min-height: 44px; }
.region-buttons button, .anatomy-view-control button,
.evidence-number-button, .day-execute-tabs button { min-height: 44px; min-width: 44px; }
.evidence-metrics dd { min-height: 44px; display: flex; align-items: baseline; }
.evidence-number-button { align-items: baseline; }
.day-execute-tabs button { font-size: var(--type-body); transition: color var(--motion-micro), border-color var(--motion-micro); }
.store-button, .connected-day .button, .day-understand .button,
.region-buttons button, .nav-download {
  transition: background var(--motion-micro), color var(--motion-micro),
    border-color var(--motion-micro), scale var(--motion-micro) var(--ease-out);
}
.store-button { will-change: auto; box-shadow: none; }
.store-button:hover { box-shadow: none; background: #fff; }
.store-button:active, .button:active:not(:disabled), .region-buttons button:active,
.nav-download:active { scale: .98; }
.text-link:hover, .quiet-button:hover, .motion-toggle:hover { color: var(--text); }
.text-link:hover span { transform: none; }
.anatomy-view-indicator, .evidence-bars span { transition-duration: var(--motion-component); }
.evidence-change { animation-duration: var(--motion-entrance); }
#region-history-list { scrollbar-gutter: stable; }
.faq-list summary > span { transition: transform var(--motion-micro) var(--ease-out); }

/* Native disclosure semantics stay intact; capable engines animate intrinsic
   height. Others retain an immediate, fully usable disclosure. */
@supports (interpolate-size: allow-keywords) {
  .faq-list details { interpolate-size: allow-keywords; }
  .faq-list details::details-content {
    block-size: 0;
    overflow: clip;
    transition: block-size var(--motion-component) var(--ease-out),
      content-visibility var(--motion-component) allow-discrete;
  }
  .faq-list details[open]::details-content { block-size: auto; }
}

@media (min-width: 761px) and (max-width: 1100px) {
  :root { --type-h1: clamp(46px, 6vw, 66px); }
  .wrap {
    width: calc(100% - max(36px, env(safe-area-inset-left)) - max(36px, env(safe-area-inset-right)));
    margin-left: max(36px, env(safe-area-inset-left));
    margin-right: max(36px, env(safe-area-inset-right));
  }
  .hero { grid-template-columns: 1.25fr 1fr; }
  .hero-description { font-size: var(--type-body); }
  .training-layout { column-gap: 5%; }
  .anatomy-toolbar { flex-wrap: wrap; }
}
@media (max-width: 760px) {
  :root {
    --type-h1: clamp(36px, 11.3vw, 68px);
    --type-h2: clamp(36px, 10.75vw, 56px);
    --type-display: clamp(32px, 9.5vw, 57px);
    --type-h3: 30px;
    --type-body-large: 14px;
    --section-space: 72px;
  }
  .wrap {
    width: auto;
    margin-left: max(20px, env(safe-area-inset-left));
    margin-right: max(20px, env(safe-area-inset-right));
  }
  .navigation { height: calc(72px + env(safe-area-inset-top)); padding-top: env(safe-area-inset-top); }
  html { scroll-padding-top: calc(84px + env(safe-area-inset-top)); }
  .hero { padding-top: calc(132px + env(safe-area-inset-top)); }
  .hero-actions { gap: 22px; }
  .hero-bottom { flex-wrap: wrap; row-gap: 0; }
  .hero-bottom > span { font-size: var(--type-microcopy); }
  .hero-motion-controls { gap: 16px; }
  .hero-replay { font-size: var(--type-microcopy); }
  .motion-toggle { font-size: var(--type-microcopy); }
  .day-system-copy { padding-block: 0; }
  .connected-day {
    --day-preview-top: calc(96px + env(safe-area-inset-top));
    --day-preview-reserve: calc(212px + env(safe-area-inset-top) + env(safe-area-inset-bottom));
  }
  .day-intro { gap: var(--space-4); margin-bottom: var(--space-5); }
  .day-system-steps { --loop-gap: 8px; --loop-connector: 8px; font-size: var(--type-microcopy); }
  .day-phone { width: min(320px, 82vw); }
  .day-workspace { gap: var(--space-4); }
  .day-plan-list li { padding-block: var(--space-2); }
  .day-receipt { min-height: 94px; }
  .training-layout { display: flex; flex-direction: column; gap: 0; }
  .training-intro, .training-copy { width: 100%; }
  .anatomy-stage { margin-top: var(--space-4); margin-bottom: var(--space-4); }
  .anatomy-theater { min-height: 540px; }
  .anatomy-map { width: 200px; }
  .training-copy .region-buttons { margin-top: 0; }
  .region-evidence { max-width: none; }
  .review-section .section-heading { margin-bottom: var(--space-4); }
  .review-output { min-height: 350px; }
  .day-stat-facts { gap: 12px; }
  .footer { padding-bottom: max(24px, env(safe-area-inset-bottom)); }
  .footer nav { flex-wrap: wrap; gap: 8px 16px; }
}
@media (max-width: 360px) {
  .hero-actions { gap: 16px; }
  .hero-actions .text-link { font-size: var(--type-microcopy); }
  .hero-bottom > span { max-width: 85px; }
  .hero-motion-controls { gap: 10px; }
  .anatomy-theater { min-height: 490px; }
  .anatomy-map { width: 182px; }
  .anatomy-view-control { min-width: 140px; }
  .anatomy-view-control button { padding-inline: 14px; }
  .anatomy-replay { font-size: var(--type-microcopy); }
  .day-stat-facts { grid-template-columns: 1fr 1fr; }
  .region-buttons { gap: 4px; }
  .region-buttons button { padding-inline: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .faq-list details::details-content { transition: none; }
  .store-button:active, .button:active:not(:disabled), .region-buttons button:active,
  .nav-download:active { scale: 1; }
}
.motion-paused .faq-list details::details-content { transition: none; }