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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-text);
  font-size: 1.125rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* A faint lamp-glow in one corner, a cool wash in the other. Atmosphere without noise. */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(110% 70% at 10% -12%, rgba(255, 210, 140, 0.06), transparent 55%),
    radial-gradient(90% 60% at 100% 112%, rgba(110, 130, 165, 0.045), transparent 60%),
    var(--bg);
}

/* Static film grain over everything. No animation: it should be felt, not seen. */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  background-image: url('../../assets/img/grain.png');
  opacity: 0.3;
}

h1,
h2,
h3,
p,
dl,
dd,
dt,
figure,
blockquote,
ol,
ul {
  margin: 0;
  padding: 0;
}
ol,
ul {
  list-style: none;
}
button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}
img {
  display: block;
  max-width: 100%;
}

/* Author `display` rules must never un-hide something marked [hidden]. */
[hidden] {
  display: none !important;
}

/* ------------------------------------------------------------ type */
.display {
  font-family: var(--font-title);
  
  font-size: clamp(3.29rem, 7.4vw, 6.59rem);
  line-height: 0.95;
  
  text-wrap: balance;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.display em {
  font-style: normal;
  color: var(--text-dim);
}
.display--m {
  font-size: clamp(2rem, 4.8vw, 3.3rem);
  line-height: 1.04;
}

.eyebrow {
  font-family: var(--font-label);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.112em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.lede {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  line-height: 1.42;
  color: var(--text);
  text-wrap: pretty;
}
.prose {
  color: var(--text-dim);
  text-wrap: pretty;
}

.link {
  background: none;
  border: 0;
  padding: 0.35rem 0;
  font-family: var(--font-label);
  font-size: 0.936rem;
  letter-spacing: 0.074em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: underline;
  text-underline-offset: 0.3em;
  text-decoration-color: var(--line-strong);
  cursor: pointer;
  font-weight: 600;
}
.link:hover {
  color: var(--text);
  text-decoration-color: var(--text);
}

/* ------------------------------------------------------------ a11y */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.skip {
  position: fixed;
  left: 12px;
  top: -60px;
  z-index: 10000;
  padding: 0.7rem 1rem;
  background: var(--text);
  color: var(--bg);
  font-family: var(--font-label);
  font-size: 0.96rem;
  letter-spacing: 0.062em;
  text-transform: uppercase;
  font-weight: 600;
}
.skip:focus {
  top: 12px;
}

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}
[tabindex='-1']:focus {
  outline: none;
}

::selection {
  background: rgba(236, 232, 223, 0.9);
  color: var(--bg);
}

/* ------------------------------------------------------------ shell */
#stage {
  min-height: 100dvh;
  padding: calc(var(--header-h) + 36px) 0 calc(var(--nav-h) + var(--safe-b) + 72px);
}
body[data-screen='opening'] #stage,
body[data-screen='disturbance'] #stage {
  padding: 0;
}
body[data-screen='opening'] .site-header,
body[data-screen='opening'] .steps,
body[data-screen='disturbance'] .site-header,
body[data-screen='disturbance'] .steps {
  display: none;
}
body[data-screen='briefing'] .steps {
  display: none;
}

.screen {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.screen-enter {
  animation: enter var(--t-med) var(--ease) both;
}
@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ------------------------------------------------------------ header + step navigation */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 30;
  height: var(--header-h);
  background: rgba(10, 10, 11, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  height: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  white-space: nowrap;
}
.brand__name {
  font-family: var(--font-title);
  font-size: 1.77rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.brand__case {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--text-dim);
}
.site-header__tools {
  display: flex;
  gap: 0.25rem;
}
.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  padding: 0 0.7rem;
  background: none;
  border: 0;
  color: var(--text-dim);
  font-family: var(--font-label);
  font-size: 0.9rem;
  letter-spacing: 0.074em;
  text-transform: uppercase;
  cursor: pointer;
  font-weight: 600;
}
.tool-btn:hover {
  color: var(--text);
}
.tool-btn__count {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.steps {
  position: fixed;
  z-index: 31;
  top: 0;
  left: 50%;
  height: var(--header-h);
  transform: translateX(-50%);
  display: flex;
  align-items: center;
}
.steps__list {
  display: flex;
  gap: 0.25rem;
}
.steps__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
  padding: 0 0.9rem;
  background: none;
  border: 0;
  color: var(--text-dim);
  font-family: var(--font-label);
  font-size: 0.9rem;
  letter-spacing: 0.087em;
  text-transform: uppercase;
  cursor: pointer;
  font-weight: 600;
}
.steps__no {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: 0.7rem;
  letter-spacing: 0;
}
.steps__btn:hover:not(:disabled) {
  color: var(--text);
}
.steps__btn.is-current {
  color: var(--text);
}
.steps__btn.is-current .steps__no {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}
.steps__btn.is-locked {
  color: var(--text-faint);
  cursor: not-allowed;
}

@media (max-width: 759px) {
  .brand__case {
    display: none;
  }
  .tool-btn__label {
    display: none;
  }
  .tool-btn {
    padding: 0 0.6rem;
  }
  .tool-btn[aria-label^='Open evidence'] .tool-btn__label {
    display: none;
  }
  /* Thumb-reach step bar. */
  .steps {
    inset: auto 0 0 0;
    transform: none;
    height: calc(var(--nav-h) + var(--safe-b));
    padding-bottom: var(--safe-b);
    background: rgba(10, 10, 11, 0.96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--line);
  }
  .steps__list {
    width: 100%;
    justify-content: space-around;
  }
  .steps__btn {
    flex-direction: column;
    gap: 0.25rem;
    padding: 0 0.6rem;
    font-size: 0.68rem;
    min-width: 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.brand__name {
  font-weight: 500;
  letter-spacing: 0.34em;
}