/* Executable Traces — media-era scroll
   Signature: borderless text rides a journey through film, radio,
   broadcast telecom, then phone-net. No card, no rules, no frames. */

:root {
  --bg: #16110e;
  --ink: #ebe0d0;
  --ink-soft: #c9b8a0;
  --ink-mute: #9a8770;
  --accent: #c9a66b;
  --focus: #d4b07a;
  --glow: rgba(201, 166, 107, 0.18);
  --measure: 36rem;
  --baseline: 1.64;
  --font-body: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-meta: "IBM Plex Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --era-label: "film";
  --glossary-toggle-fg: var(--ink-mute);
  --glossary-tip-bg: rgba(12, 10, 8, 0.94);
  --glossary-tip-fg: #f2e8d8;
  --glossary-tip-border: transparent;
  --glossary-tip-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-body);
  font-size: clamp(1.06rem, 0.98rem + 0.38vw, 1.22rem);
  line-height: var(--baseline);
  -webkit-font-smoothing: antialiased;
  transition:
    background-color 0.55s ease,
    color 0.55s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--veil-opacity, 0.55);
  background: var(--veil, none);
  transition: opacity 0.55s ease, background 0.55s ease;
}

#era-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

.site-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: transparent;
}

.home-link,
.language-link {
  font-family: var(--font-meta);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-mute);
  transition: color 0.35s ease;
}

.home-link:hover,
.language-link:hover {
  color: var(--ink);
}

.language-nav {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
}

.language-link[aria-current="page"] {
  color: var(--accent);
}

.home-link:focus-visible,
.language-link:focus-visible,
.prose a:focus-visible,
.refs a:focus-visible,
.glossary-hints-toggle:focus-within {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.edition {
  position: relative;
  z-index: 1;
  width: min(100% - 2.4rem, var(--measure));
  margin: 5.5rem auto 5rem;
  padding: 0;
  background: transparent;
  color: var(--ink);
  box-shadow: none;
  text-shadow: 0 1px 20px color-mix(in srgb, var(--bg) 75%, transparent);
}

.edition::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -1.5rem -2.5rem;
  background: radial-gradient(
    ellipse 70% 55% at 40% 20%,
    color-mix(in srgb, var(--bg) 82%, transparent),
    transparent 72%
  );
  pointer-events: none;
}

.article-head {
  margin-bottom: 2.4rem;
  padding: 0;
}

.article-head h1 {
  margin: 0 0 0.65rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: clamp(2.05rem, 1.45rem + 2.4vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
  color: var(--ink);
  transition: letter-spacing 0.55s ease, color 0.55s ease;
}

.article-subtitle {
  margin: 0 0 1rem;
  font-family: var(--font-meta);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--ink-soft);
  max-width: 32rem;
}

.article-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.article-meta a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent);
  text-underline-offset: 0.2em;
}

.hint-bar {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 1.5rem;
}

.hint-bar .glossary-hints-toggle {
  --glossary-toggle-size: 1.05rem;
}

.glossary-term {
  border-bottom: none !important;
  text-decoration: underline dotted;
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-underline-offset: 0.2em;
}

.glossary-tip {
  border: none !important;
  border-radius: 0 !important;
}

.glossary-tip::after,
.glossary-tip::before {
  display: none !important;
}

.prose {
  text-align: justify;
  hyphens: auto;
  text-wrap: pretty;
  orphans: 3;
  widows: 3;
}

.era-block {
  margin: 0 0 0.2rem;
}

.era-block + .era-block {
  margin-top: 2.4rem;
  padding-top: 0.2rem;
}

.prose p {
  margin: 0 0 1.2em;
  transition: color 0.45s ease;
}

.prose a {
  color: var(--ink);
  text-decoration-color: color-mix(in srgb, var(--accent) 55%, transparent);
  text-underline-offset: 0.18em;
}

.prose a:hover {
  color: var(--accent);
}

.prose em {
  font-style: italic;
}

.quote {
  margin: 1.6rem 0 1.7rem;
  padding: 0;
  color: var(--ink-soft);
  font-style: italic;
  font-size: 1.05em;
}

.quote cite {
  display: block;
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-style: normal;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.refs {
  margin-top: 3rem;
  padding-top: 0.4rem;
}

.refs h2 {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.refs ol {
  margin: 0;
  padding-left: 1.15rem;
  font-family: var(--font-meta);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

.refs li {
  margin-bottom: 0.55rem;
}

.refs a {
  color: var(--ink-soft);
  word-break: break-word;
}

/* Era-tuned type texture (scroll JS sets body[data-era]) */
body[data-era="film"] .article-head h1 {
  letter-spacing: 0.01em;
}

body[data-era="radio"] .article-head h1,
body[data-era="radio"] .prose {
  letter-spacing: 0.005em;
}

body[data-era="telecom"] .prose {
  font-feature-settings: "ss01" 0;
}

body[data-era="net"] .article-head h1 {
  letter-spacing: -0.04em;
  font-family: var(--font-meta);
}

body[data-era="net"] .prose {
  letter-spacing: -0.01em;
}

@media (max-width: 720px) {
  .edition {
    width: min(100% - 1.4rem, var(--measure));
    margin-top: 4.5rem;
  }

  .prose {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  #era-canvas {
    display: none;
  }

  body,
  body::before,
  .prose p,
  .article-head h1,
  .home-link,
  .language-link {
    transition: none;
  }
}

@media (prefers-contrast: high) {
  :root {
    --bg: #000000;
    --ink: #ffffff;
    --ink-soft: #eeeeee;
    --ink-mute: #cccccc;
    --accent: #ffffff;
  }

  body::before {
    display: none;
  }
}