/* ==========================================================================
   Reset + primitives
   ========================================================================== */

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

* { margin: 0; padding: 0; }

/* 62.5% gives a 10px rem base, so 1.6rem == 16px throughout. */
html {
  font-size: 62.5%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.4;
  letter-spacing: var(--ls-body);
  color: var(--fg);
  background: var(--black);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overscroll-behavior: none;
}

/* The stack engine owns the viewport; the document itself never scrolls. */
body.is-locked {
  height: 100vh;
  overflow: hidden;
}

img, video, canvas, svg { display: block; max-width: 100%; }
img, video { object-fit: cover; }

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  letter-spacing: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

ul, ol { list-style: none; }

::selection {
  background: var(--purple);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 3px;
  border-radius: 2px;
}

.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-link {
  position: fixed;
  top: var(--gutter);
  left: 50%;
  transform: translate(-50%, -200%);
  z-index: 200;
  padding: 1rem 1.8rem;
  border-radius: var(--border-radius-pill);
  background: #fff;
  color: #000;
  transition: transform var(--dur) var(--ease-out);
}
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* ==========================================================================
   Type primitives
   ========================================================================== */

.display {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
  color: var(--text-bold);
}

.display--xl { font-size: var(--fs-display-xl); }
.display--lg { font-size: var(--fs-display-lg); }
.display--md { font-size: var(--fs-display-md); }
.display--sm { font-size: var(--fs-display-sm); }

.display em {
  font-style: italic;
  /* The italic cut is noticeably narrower — nudge tracking to keep colour even. */
  letter-spacing: -0.005em;
}

.body-lg {
  font-size: var(--fs-body-lg);
  line-height: 1.35;
  letter-spacing: var(--ls-body);
}

.body {
  font-size: var(--fs-body);
  line-height: 1.4;
  color: var(--text-regular);
}

.label {
  font-size: var(--fs-label);
  line-height: 1.2;
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-subtle);
}

.text-subtle { color: var(--text-subtle); }
.text-regular { color: var(--text-regular); }

/* Digits sit better tabular in stat blocks and the clock. */
.tnum { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

/* ==========================================================================
   Buttons / pills
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  height: var(--button-height-md);
  padding: 0 var(--button-padding);
  border: 1px solid transparent;
  border-radius: var(--border-radius-pill);
  background: var(--button-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  font-size: var(--fs-body);
  line-height: 1;
  white-space: nowrap;
  color: var(--fg);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.btn:hover {
  background: hsla(0, 0%, 100%, 0.28);
  border-color: hsla(0, 0%, 100%, 0.18);
}

.btn:active { transform: scale(0.97); }

.btn--sm { height: var(--button-height); font-size: var(--fs-small); padding: 0 1.2rem; }
.btn--lg { height: var(--button-height-lg); }

.btn--solid {
  background: var(--bg-invert);
  color: var(--fg-invert);
}
.btn--solid:hover { background: #fff; border-color: transparent; }

.btn--highlight {
  background: var(--bg-highlight);
  color: #fff;
}
.btn--highlight:hover { background: #6f66ff; border-color: transparent; }

.btn--icon {
  width: var(--button-height-md);
  padding: 0;
  border-radius: 50%;
}

.btn--icon svg { width: 1.6rem; height: 1.6rem; }

/* ==========================================================================
   Link with an animated underline (used across editorial rows)
   ========================================================================== */

.link-underline {
  position: relative;
  display: inline-block;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2em;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--dur) var(--ease-out);
}

.link-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* ==========================================================================
   Reveal primitives — driven by IntersectionObserver + the scroll engine
   ========================================================================== */

.reveal-line {
  display: block;
  overflow: hidden;
}

.reveal-line > span {
  display: block;
  transform: translateY(105%);
  transition:
    transform 1.1s var(--ease-out),
    opacity 1.1s var(--ease-out);
  opacity: 0;
}

.is-revealed .reveal-line > span,
.reveal-line.is-revealed > span {
  transform: translateY(0);
  opacity: 1;
}

/* Stagger successive lines of the same block. */
.reveal-line:nth-child(2) > span { transition-delay: 0.08s; }
.reveal-line:nth-child(3) > span { transition-delay: 0.16s; }
.reveal-line:nth-child(4) > span { transition-delay: 0.24s; }
.reveal-line:nth-child(5) > span { transition-delay: 0.32s; }

.fade-up {
  opacity: 0;
  transform: translateY(2.4rem);
  transition:
    opacity 0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
}

.is-revealed .fade-up,
.fade-up.is-revealed {
  opacity: 1;
  transform: none;
}

.is-revealed .fade-up:nth-child(2) { transition-delay: 0.06s; }
.is-revealed .fade-up:nth-child(3) { transition-delay: 0.12s; }
.is-revealed .fade-up:nth-child(4) { transition-delay: 0.18s; }
.is-revealed .fade-up:nth-child(5) { transition-delay: 0.24s; }
.is-revealed .fade-up:nth-child(6) { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal-line > span,
  .fade-up {
    opacity: 1;
    transform: none;
  }
}