/* NYX // DEAD AIR — standalone campaign stylesheet.
   Intentionally isolated from styles.css so the main site is never touched by this page. */

:root {
  color-scheme: dark;
  --da-bg: #05080a;
  --da-bg-elevated: #0a1113;
  --da-panel: rgba(255, 255, 255, 0.04);
  --da-panel-strong: rgba(10, 16, 18, 0.86);
  --da-line: rgba(232, 238, 238, 0.14);
  --da-line-strong: rgba(232, 238, 238, 0.28);
  --da-text: #e8ecec;
  --da-muted: rgba(232, 236, 236, 0.66);
  --da-faint: rgba(232, 236, 236, 0.4);
  --da-amber: #d99a3d;
  --da-amber-strong: #f0b25c;
  --da-teal: #4fb3ab;
  --da-teal-strong: #6fd6cd;
  --da-green: #6f9a72;
  --da-warn: #c05a4a;
  --da-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  --da-font-display: Arial, "Helvetica Neue", ui-sans-serif, system-ui, sans-serif;
  --da-font-body: Arial, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --da-font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --da-section-pad: clamp(20px, 4vw, 64px);
  --da-transition: 620ms cubic-bezier(0.65, 0, 0.24, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body.dead-air {
  margin: 0;
  background: var(--da-bg);
  color: var(--da-text);
  font-family: var(--da-font-body);
  line-height: 1.55;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

body.dead-air.is-mobile-mode {
  overflow: auto;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --da-transition: 1ms linear;
  }

  .dead-air * {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}

.dead-air a {
  color: inherit;
}

.dead-air img {
  max-width: 100%;
  display: block;
}

.dead-air .skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--da-amber);
  color: #101010;
  padding: 10px 16px;
  z-index: 999;
  font-family: var(--da-font-mono);
  font-size: 0.85rem;
}

.dead-air .skip-link:focus {
  left: 12px;
  top: 12px;
}

/* Ambience overlays: grain, scanlines, vignette */
.da-ambience {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

.da-ambience__grain {
  position: absolute;
  inset: -10%;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-size: 220px 220px;
}

.da-ambience__scanlines {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.028) 0px,
    rgba(255, 255, 255, 0.028) 1px,
    transparent 1px,
    transparent 3px
  );
}

.da-ambience__vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 42%, rgba(0, 0, 0, 0.62) 100%);
}

/* Home escape link — just the logo, like the main site header */
.da-home {
  position: fixed;
  top: clamp(28px, 4.4vw, 64px);
  left: clamp(28px, 5vw, 72px);
  z-index: 40;
  display: inline-flex;
  opacity: 0.92;
  transition: opacity 200ms ease, transform 200ms ease;
}

.da-home:hover,
.da-home:focus-visible {
  opacity: 1;
  transform: translateY(-1px);
}

.da-home img {
  width: clamp(140px, 15vw, 210px);
  height: auto;
  display: block;
}

@media (max-width: 880px) {
  .da-home {
    top: clamp(18px, 5vw, 28px);
    left: clamp(18px, 5vw, 28px);
  }

  .da-home img {
    width: clamp(70px, 24vw, 105px);
  }
}

/* Viewport / track */
.da-viewport {
  position: relative;
  height: 100vh;
  height: 100svh;
  width: 100vw;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.da-viewport::-webkit-scrollbar {
  display: none;
}

.da-track {
  display: flex;
  flex-direction: row;
  height: 100%;
  width: max-content;
}

.da-section {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100svh;
  flex: 0 0 100vw;
  scroll-snap-align: start;
  border-right: 1px solid var(--da-line);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(79, 179, 171, 0.06), transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(217, 154, 61, 0.05), transparent 55%),
    var(--da-bg-elevated);
}

.da-section__inner {
  position: relative;
  height: 100%;
  width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding: clamp(88px, 9vh, 130px) var(--da-section-pad) clamp(90px, 10vh, 130px);
  scrollbar-width: thin;
  scrollbar-color: var(--da-line-strong) transparent;
}

.da-section__inner::-webkit-scrollbar {
  width: 6px;
}

.da-section__inner::-webkit-scrollbar-thumb {
  background: var(--da-line-strong);
  border-radius: 4px;
}

.da-section__stage {
  max-width: 1080px;
  margin: 0 auto;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(18px, 2.4vw, 28px);
}

/* Case file chrome shared across sections */
.da-eyebrow {
  font-family: var(--da-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--da-teal-strong);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.da-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--da-teal-strong);
  display: inline-block;
}

.da-title {
  font-family: var(--da-font-display);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.02;
  margin: 0;
  font-size: clamp(2.4rem, 6.4vw, 5.6rem);
}

.da-title--hero {
  font-size: clamp(2.8rem, 9vw, 7.4rem);
}

.da-title small {
  display: block;
  font-family: var(--da-font-mono);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 0.28em;
  color: var(--da-muted);
  margin-top: 10px;
}

.da-tagline {
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  color: var(--da-amber-strong);
  font-style: italic;
  max-width: 46ch;
}

.da-lede {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--da-text);
  max-width: 62ch;
}

.da-lede p {
  margin: 0 0 0.85em;
}

.da-lede p:last-child {
  margin-bottom: 0;
}

/* Full-width narrative text (episode story body) */
.da-story {
  max-width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.7em;
}

.da-story p {
  margin: 0;
  color: var(--da-text);
  font-size: clamp(1rem, 1.3vw, 1.14rem);
}

.da-story__highlight {
  font-family: var(--da-font-mono);
  color: var(--da-teal-strong) !important;
  letter-spacing: 0.04em;
  font-size: clamp(1.05rem, 1.4vw, 1.2rem) !important;
  margin: 0.3em 0 !important;
}

.da-story__time-jump {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--da-font-mono);
  font-size: 0.72rem !important;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--da-amber-strong) !important;
  margin: 0.5em 0 !important;
}

.da-story__time-jump::before,
.da-story__time-jump::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--da-line);
}

.da-muted {
  color: var(--da-muted);
}

.da-claim {
  font-family: var(--da-font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--da-teal-strong);
  border-left: 2px solid var(--da-teal);
  padding-left: 14px;
}

.da-disclaimer {
  font-size: 0.78rem;
  color: var(--da-faint);
  max-width: 60ch;
  border-top: 1px solid var(--da-line);
  padding-top: 14px;
  margin-top: 6px;
}

/* Buttons */
.da-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 6px;
}

.da-btn {
  font-family: var(--da-font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 3px;
  border: 1px solid var(--da-line-strong);
  color: var(--da-text);
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: border-color 200ms ease, color 200ms ease, background 200ms ease, transform 200ms ease;
}

.da-btn:hover,
.da-btn:focus-visible {
  border-color: var(--da-amber);
  color: var(--da-amber-strong);
  transform: translateY(-1px);
}

.da-btn--primary {
  background: var(--da-amber);
  border-color: var(--da-amber);
  color: #171008;
  font-weight: 700;
}

.da-btn--primary:hover,
.da-btn--primary:focus-visible {
  background: var(--da-amber-strong);
  border-color: var(--da-amber-strong);
  color: #171008;
}

.da-btn--teal {
  border-color: rgba(79, 179, 171, 0.5);
  color: var(--da-teal-strong);
}

.da-btn--teal:hover,
.da-btn--teal:focus-visible {
  border-color: var(--da-teal-strong);
  color: var(--da-teal-strong);
  background: rgba(79, 179, 171, 0.08);
}

.da-btn--ghost {
  border-color: var(--da-line);
  color: var(--da-muted);
  background: transparent;
}

.da-btn[disabled],
.da-btn--locked {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* Dossier / evidence cards */
.da-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.da-card {
  position: relative;
  background: var(--da-panel);
  border: 1px solid var(--da-line);
  border-radius: 4px;
  padding: 18px;
  overflow: hidden;
}

.da-card__label {
  font-family: var(--da-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--da-teal-strong);
  display: block;
  margin-bottom: 8px;
}

.da-card__title {
  font-family: var(--da-font-display);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.da-card__status {
  display: inline-block;
  font-family: var(--da-font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 10px;
}

.da-card__status--verified {
  color: var(--da-teal-strong);
  border: 1px solid rgba(79, 179, 171, 0.5);
}

.da-card__status--suspicious {
  color: var(--da-amber-strong);
  border: 1px solid rgba(217, 154, 61, 0.5);
}

.da-card__status--deceased {
  color: var(--da-warn);
  border: 1px solid rgba(192, 90, 74, 0.5);
}

.da-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--da-muted);
}

/* Faint evidence stamp — carries the hidden code fragment for the episode */
.da-stamp {
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-family: var(--da-font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--da-amber);
  opacity: 0.5;
  transform: rotate(-7deg);
  border: 1px solid currentColor;
  padding: 2px 6px;
  border-radius: 2px;
  user-select: text;
}

/* Archived note card (secondary hiding spot for texture, not the code itself) */
.da-archive-note {
  border-left: 2px dashed var(--da-line-strong);
  padding: 10px 14px;
  font-family: var(--da-font-mono);
  font-size: 0.78rem;
  color: var(--da-faint);
}

.da-archive-note__tag {
  display: block;
  color: var(--da-muted);
  letter-spacing: 0.1em;
  font-size: 0.66rem;
  margin-bottom: 4px;
}

/* Photo placeholders */
.da-photo {
  position: relative;
  margin: 0;
  border: 1px solid var(--da-line);
  background: linear-gradient(160deg, rgba(79, 179, 171, 0.08), rgba(0, 0, 0, 0.4));
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.da-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.da-photo figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 6px 10px;
  font-family: var(--da-font-mono);
  font-size: 0.66rem;
  color: var(--da-faint);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.65), transparent);
}

.da-photo--missing img {
  display: none;
}

.da-photo--missing::after {
  content: attr(data-fallback-label);
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px;
  font-family: var(--da-font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--da-faint);
  background: repeating-linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.03) 0 10px,
    rgba(255, 255, 255, 0.01) 10px 20px
  );
}

.da-photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

/* Option / vote cards */
.da-option {
  border: 1px solid var(--da-line);
  border-radius: 4px;
  overflow: hidden;
  background: var(--da-panel);
  display: flex;
  flex-direction: column;
}

.da-option .da-photo {
  aspect-ratio: 4 / 3;
  border: none;
  border-bottom: 1px solid var(--da-line);
}

.da-option__body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.da-option__letter {
  font-family: var(--da-font-mono);
  color: var(--da-amber-strong);
  font-size: 0.78rem;
}

.da-option__title {
  font-family: var(--da-font-display);
  font-weight: 700;
  margin: 0;
  font-size: 1.02rem;
}

.da-option__body p {
  margin: 0;
  color: var(--da-muted);
  font-size: 0.88rem;
}

.da-option__consequence {
  font-size: 0.78rem;
  color: var(--da-faint);
  font-style: italic;
}

/* Status chips */
.da-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--da-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: 2px;
}

.da-status-chip--unlocked {
  color: var(--da-teal-strong);
  border: 1px solid rgba(79, 179, 171, 0.55);
}

.da-status-chip--unlocked::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--da-teal-strong);
  box-shadow: 0 0 8px var(--da-teal-strong);
}

.da-status-chip--locked {
  color: var(--da-warn);
  border: 1px solid rgba(192, 90, 74, 0.55);
}

.da-status-chip--locked::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--da-warn);
}

.da-case-number {
  font-family: var(--da-font-mono);
  font-size: 0.72rem;
  color: var(--da-faint);
  letter-spacing: 0.1em;
}

/* Locked section styling */
.da-section.is-locked .da-section__inner {
  pointer-events: none;
}

.da-locked-fill {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  max-width: 640px;
  margin: 0 auto;
  filter: blur(9px) saturate(0.55) brightness(0.5);
}

.da-locked-fill .redacted-line {
  height: 12px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.08);
}

.da-lock-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--da-section-pad);
  text-align: center;
  z-index: 2;
}

.da-lock-overlay__panel {
  max-width: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 34px clamp(20px, 4vw, 44px);
  border: 1px solid rgba(192, 90, 74, 0.4);
  background: var(--da-panel-strong);
  border-radius: 6px;
  box-shadow: var(--da-shadow);
}

.da-lock-icon {
  width: 34px;
  height: 34px;
  opacity: 0.85;
  color: var(--da-warn);
}

.da-lock-overlay h2 {
  font-family: var(--da-font-display);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  margin: 0;
}

.da-lock-teaser {
  color: var(--da-muted);
  font-size: 1rem;
  max-width: 42ch;
  font-style: italic;
}

.da-lock-branches {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  font-family: var(--da-font-mono);
  font-size: 0.72rem;
  color: var(--da-faint);
}

.da-lock-branches li {
  border: 1px solid var(--da-line);
  padding: 4px 9px;
  border-radius: 2px;
}

.da-lock-note {
  font-family: var(--da-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--da-faint);
  text-transform: uppercase;
}

/* Character dossier layout */
.da-dossier {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.da-dossier__photo {
  aspect-ratio: 2 / 3;
}

.da-dossier__quote {
  font-family: var(--da-font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--da-amber-strong);
  border-left: 2px solid var(--da-amber);
  padding-left: 16px;
  margin: 0;
}

@media (max-width: 760px) {
  .da-dossier {
    grid-template-columns: 1fr;
  }

  .da-dossier__photo {
    max-width: 280px;
    margin: 0 auto;
  }
}

/* Immersion protocol / affiliate cards */
.da-partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.da-partner {
  background: var(--da-panel);
  border: 1px solid var(--da-line);
  border-radius: 4px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.da-partner__role {
  font-family: var(--da-font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--da-teal-strong);
}

.da-partner__name {
  font-family: var(--da-font-display);
  font-weight: 800;
  font-size: 1.1rem;
  margin: 0;
}

.da-partner p {
  margin: 0;
  color: var(--da-muted);
  font-size: 0.9rem;
  flex: 1;
}

.da-affiliate-tag {
  align-self: flex-start;
  font-family: var(--da-font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--da-faint);
  border: 1px solid var(--da-line);
  padding: 2px 7px;
  border-radius: 2px;
}

/* Case file tab progress nav */
.da-progress {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  padding: 0 clamp(20px, 4vw, 48px) 0;
  overflow-x: auto;
  scrollbar-width: none;
  background: linear-gradient(to top, rgba(2, 3, 4, 0.9), rgba(2, 3, 4, 0));
  padding-top: 44px;
}

.da-progress::-webkit-scrollbar {
  display: none;
}

.da-progress__tab {
  flex: 0 0 auto;
  font-family: var(--da-font-mono);
  font-size: 1.24rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--da-faint);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--da-line);
  border-bottom: none;
  padding: 14px 20px 16px;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: color 200ms ease, background 200ms ease, transform 160ms ease;
  white-space: nowrap;
}

.da-progress__tab:hover,
.da-progress__tab:focus-visible {
  color: var(--da-text);
}

.da-progress__tab[data-locked="true"] {
  color: rgba(192, 90, 74, 0.65);
}

.da-progress__tab.is-active {
  color: var(--da-bg);
  background: var(--da-amber);
  border-color: var(--da-amber);
  transform: translateY(-6px);
}

.da-progress__tab.is-active[data-locked="true"] {
  background: var(--da-warn);
  border-color: var(--da-warn);
  color: #1a0d0a;
}

/* Prev / next controls */
.da-nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 45;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--da-line-strong);
  background: rgba(6, 10, 11, 0.55);
  backdrop-filter: blur(6px);
  color: var(--da-text);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 200ms ease, color 200ms ease;
}

.da-nav-btn:hover,
.da-nav-btn:focus-visible {
  border-color: var(--da-amber);
  color: var(--da-amber-strong);
}

.da-nav-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.da-nav-prev {
  left: 16px;
}

.da-nav-next {
  right: 16px;
}

/* Scroll hint on cover */
.da-scroll-hint {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--da-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--da-faint);
  animation: da-hint-shift 2.4s ease-in-out infinite;
}

@keyframes da-hint-shift {
  0%, 100% { transform: translateX(0); opacity: 0.6; }
  50% { transform: translateX(6px); opacity: 1; }
}

/* Toast */
.da-toast {
  position: fixed;
  left: 50%;
  bottom: 118px;
  transform: translate(-50%, 12px);
  z-index: 60;
  background: var(--da-panel-strong);
  border: 1px solid var(--da-line-strong);
  color: var(--da-text);
  font-family: var(--da-font-mono);
  font-size: 0.78rem;
  padding: 10px 18px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease, transform 220ms ease;
  max-width: 80vw;
  text-align: center;
}

.da-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* Footer content (lives inside the final section) */
.da-footer {
  border-top: 1px solid var(--da-line);
  padding-top: 18px;
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--da-faint);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Mobile: vertical stacked chapters */
@media (max-width: 880px) {
  .da-viewport {
    overflow-x: hidden;
    overflow-y: auto;
    scroll-snap-type: y mandatory;
    height: 100vh;
    height: 100svh;
  }

  .da-track {
    flex-direction: column;
    width: 100%;
    height: auto;
  }

  .da-section {
    width: 100%;
    flex-basis: auto;
    height: auto;
    min-height: 100vh;
    min-height: 100svh;
    border-right: none;
    border-bottom: 1px solid var(--da-line);
  }

  .da-section__inner {
    overflow-y: visible;
    padding: 96px 20px 110px;
  }

  .da-dossier {
    grid-template-columns: 1fr;
  }

  .da-nav-btn {
    display: none;
  }

  .da-progress {
    padding-top: 28px;
  }

  .da-progress__tab {
    padding: 12px 16px 14px;
    font-size: 1.16rem;
  }
}

@media (min-width: 881px) {
  .da-mobile-only {
    display: none;
  }
}

@media (max-width: 880px) {
  .da-desktop-only {
    display: none;
  }
}