/* ============================================================
   History of the World — an interactive timeline of history
   Editorial / archival visual identity: warm parchment ground,
   serif display type, thin lines, restrained ochre/brass accent.
   ============================================================ */

/* Self-hosted Spectral + Inter (latin & latin-ext subsets only) — downloaded from
   Google Fonts once and served locally, so no visitor request ever reaches Google's
   servers. See src/fonts/ for the .woff2 files themselves. */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/inter-500-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-600-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/inter-700-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/spectral-400-italic-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: italic;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/spectral-500-italic-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/spectral-400-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/spectral-500-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/spectral-600-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/spectral-700-normal-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/inter-400-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/inter-500-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/inter-600-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/inter-700-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/spectral-400-italic-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: italic;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/spectral-500-italic-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/spectral-400-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/spectral-500-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/spectral-600-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Spectral';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/spectral-700-normal-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --color-bg: #f5efe1;
  --color-bg-alt: #ece3cf;
  --color-surface: #fffcf5;
  --color-ink: #241f19;
  --color-ink-soft: #5c5344;
  --color-ink-faint: #8a8070;
  --color-line: #d9cdae;
  --color-line-strong: #c2b48d;
  --color-accent: #a3702f;
  --color-accent-soft: #c9a86a;
  --shadow-panel: 0 18px 50px rgba(40, 30, 10, 0.22);
  --shadow-soft: 0 2px 10px rgba(40, 30, 10, 0.08);

  --font-serif: 'Spectral', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --header-height: 108px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #14161c;
    --color-bg-alt: #1b1e26;
    --color-surface: #1e222b;
    --color-ink: #ece6d6;
    --color-ink-soft: #b3ac9a;
    --color-ink-faint: #7c7666;
    --color-line: #363a44;
    --color-line-strong: #454a56;
    --color-accent: #d4ac6a;
    --color-accent-soft: #d4ac6a;
    --shadow-panel: 0 18px 50px rgba(0, 0, 0, 0.55);
    --shadow-soft: 0 2px 10px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto; /* JS drives smooth scrolling explicitly, respecting reduced-motion */
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.6rem 1rem;
  z-index: 200;
  border-radius: 0 0 4px 0;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.icon {
  display: block;
  flex-shrink: 0;
}

/* ---------------- Header ---------------- */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}

.site-header__row--brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.65rem 1rem;
}

.icon-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.45rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  min-width: 2.25rem;
  min-height: 2.25rem;
}
.icon-btn:hover {
  background: var(--color-bg-alt);
}

.menu-toggle {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--color-accent-soft);
}
.brand__mark .icon {
  width: 22px;
  height: 22px;
}
.brand__name {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  line-height: 1.1;
}
.brand__tagline {
  display: block;
  font-size: 0.68rem;
  color: var(--color-ink-soft);
  letter-spacing: 0.01em;
}

.now-indicator {
  margin-left: auto;
  text-align: right;
  padding-right: 0.4rem;
  min-width: 0;
}
.now-indicator__era {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.now-indicator__date {
  display: block;
  font-size: 0.7rem;
  color: var(--color-ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-link {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.header-link:hover,
.header-link:focus-visible {
  color: var(--color-ink);
  text-decoration: underline;
}

.search {
  position: relative;
}
.search__form {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  width: min(400px, 88vw);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  box-shadow: var(--shadow-panel);
  padding: 0.7rem;
  z-index: 55;
}
#searchInput {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: 5px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  background: var(--color-bg);
  color: var(--color-ink);
}
#searchInput:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.search__results {
  margin-top: 0.5rem;
  max-height: min(50vh, 380px);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.search__results[hidden] {
  display: none;
}
.search-result {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.45rem 0.5rem;
  border: none;
  background: none;
  text-align: left;
  border-radius: 5px;
  cursor: pointer;
  width: 100%;
}
.search-result:hover,
.search-result:focus-visible {
  background: var(--color-bg-alt);
}
.search-result__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.search-result__title {
  display: block;
  font-size: 0.85rem;
}
.search-result__subtitle {
  display: block;
  font-size: 0.72rem;
  color: var(--color-ink-soft);
}

/* ---------------- Control panel (categories + jump nav) ---------------- */

.control-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  padding: 0.6rem 1rem 0.85rem;
  border-top: 1px solid var(--color-line);
}
.control-panel__section {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.control-panel__label {
  margin: 0;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  color: var(--color-ink-faint);
}

.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.categories[hidden] {
  display: none;
}
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  border-radius: 5px;
  padding: 0.38rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.cat-chip .icon {
  color: var(--cat-color);
}
.cat-chip:hover {
  border-color: var(--cat-color);
}
.cat-chip--on {
  background: color-mix(in srgb, var(--cat-color) 16%, var(--color-surface));
  border-color: var(--cat-color);
  color: var(--color-ink);
}
.cat-chip--more {
  --cat-color: var(--color-ink-faint);
  border-style: dashed;
  color: var(--color-ink-faint);
}
.cat-chip--more:hover {
  border-color: var(--color-ink-soft);
  color: var(--color-ink);
}
.categories--more {
  margin-top: 0.4rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--color-line);
}

.your-choice-search {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-width: 320px;
}
#yourChoiceInput {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-line);
  border-radius: 5px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  background: var(--color-bg);
  color: var(--color-ink);
}
#yourChoiceInput:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.your-choice-search__hint {
  margin: 0;
  font-size: 0.72rem;
  color: var(--color-ink-faint);
  line-height: 1.35;
}

.jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.jump-btn {
  border: 1px solid var(--color-line);
  background: transparent;
  border-radius: 5px;
  padding: 0.32rem 0.65rem;
  font-size: 0.75rem;
  color: var(--color-ink-soft);
  cursor: pointer;
}
.jump-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-ink);
}

@media (max-width: 560px) {
  .brand__tagline {
    display: none;
  }
  .now-indicator {
    max-width: 34vw;
  }
  .now-indicator__era {
    font-size: 0.82rem;
  }
  .now-indicator__date {
    font-size: 0.64rem;
  }
  .site-header__row--brand {
    gap: 0.5rem;
    padding: 0.5rem 0.6rem;
  }
}

@media (max-width: 899px) {
  .menu-toggle {
    display: inline-flex;
  }
  .control-panel {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    box-shadow: var(--shadow-panel);
    z-index: 39;
  }
  .control-panel--open {
    display: flex;
  }
}

/* ---------------- Intro ---------------- */

.intro {
  max-width: 620px;
  margin: 2.75rem auto 2rem;
  padding: 0 1.25rem;
}
.intro h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  line-height: 1.18;
  margin: 0 0 0.85rem;
}
.intro p {
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--color-ink-soft);
  margin: 0 0 1.35rem;
}
/* The category toggles live in the sticky header, so they're genuinely "above" the
   page content on desktop — but on narrow screens they're tucked behind the menu
   button instead, so the copy needs to say something different there. */
.intro__hint--mobile {
  display: none;
}
@media (max-width: 899px) {
  .intro__hint--desktop {
    display: none;
  }
  .intro__hint--mobile {
    display: inline;
  }
}
.btn {
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.65rem 1.15rem;
  border-radius: 5px;
  border: 1px solid var(--color-ink);
  background: var(--color-ink);
  color: var(--color-bg);
  cursor: pointer;
}
.btn:hover {
  opacity: 0.86;
}

/* ---------------- Timeline stage ---------------- */

.stage {
  position: relative;
  padding-bottom: 6rem;
}

.canvas {
  position: relative;
}

/* Era rail: a minimal always-on ruler of tick marks + boundary years */
.era-rail {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}
.rail-tick {
  position: absolute;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
}
.rail-tick__line {
  width: 8px;
  height: 1px;
  background: var(--color-line-strong);
  flex-shrink: 0;
}
.rail-tick__label {
  margin-left: 5px;
  font-size: 0.6rem;
  color: var(--color-ink-faint);
  white-space: nowrap;
}
.rail-tick--major .rail-tick__line {
  width: 14px;
  height: 1.5px;
  background: var(--color-accent);
}
.rail-tick--major .rail-tick__label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--color-ink);
}

/* Era bands: full-width background wash */
.era-band {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 0;
  border-top: 1px solid transparent;
}
.era-band--visible {
  background: color-mix(in srgb, var(--era-color) 13%, var(--color-bg));
  border-top: 1px solid color-mix(in srgb, var(--era-color) 55%, transparent);
  cursor: pointer;
}
.era-band--visible:hover,
.era-band--visible:focus-visible {
  background: color-mix(in srgb, var(--era-color) 20%, var(--color-bg));
}
.era-band__label {
  position: absolute;
  top: 0.7rem;
  left: 0.85rem;
  /* Stay confined to the rail column so a duration bar starting right at an era's
     top edge can never sit behind — let alone obscure — the era's own name. */
  max-width: calc(var(--rail-w, 150px) - 1.5rem);
  pointer-events: none;
}
.era-band__name {
  display: block;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-ink);
}
.era-band__dates {
  display: block;
  font-size: 0.68rem;
  color: var(--color-ink-soft);
  margin-top: 0.1rem;
}

/* Duration-bar lanes: Empires, U.S. Presidents, British Monarchs, … */
.range-lane {
  position: absolute;
  top: 0;
  height: 100%;
  z-index: 2;
}
.range-bar {
  position: absolute;
  box-sizing: border-box;
  border-radius: 3px;
  border: 1px solid color-mix(in srgb, var(--cat-color) 70%, transparent);
  border-left: 4px solid var(--cat-color);
  background: color-mix(in srgb, var(--cat-color) 30%, var(--color-surface));
  padding: 4px 6px;
  /* Deliberately NOT clipped: the label below is a floating, sticky chip that's
     allowed to spill past a narrow bar's own edges so its (always-horizontal) text
     stays fully readable even during the most crowded, many-lane stretches. */
  overflow: visible;
  cursor: pointer;
  text-align: left;
  box-shadow: var(--shadow-soft);
}
.range-bar:hover,
.range-bar:focus-visible {
  background: color-mix(in srgb, var(--cat-color) 48%, var(--color-surface));
  z-index: 5;
}
/* Sticky within the bar's own box (its nearest positioned ancestor): as the page
   scrolls, the label pins at `top` for as long as the bar itself still spans that
   point on screen, then scrolls away normally once the bar's bottom edge passes it —
   so a bar taller than the viewport (a long empire, a long reign) never loses its
   name partway through. render.js gives concurrent lanes distinct sticky offsets so
   overlapping bars' labels don't collide. */
.range-bar__label {
  position: sticky;
  z-index: 4;
  display: inline-block;
  max-width: none;
  white-space: nowrap;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-ink);
  background: color-mix(in srgb, var(--cat-color) 55%, var(--color-surface));
  border: 1px solid color-mix(in srgb, var(--cat-color) 85%, transparent);
  border-radius: 3px;
  padding: 1px 6px;
  box-shadow: var(--shadow-soft);
}

/* Point-event tracks */
.track {
  position: absolute;
  top: 0;
  z-index: 3;
}
.track__empty-hint {
  position: absolute;
  top: 8px;
  left: 0;
  right: 8px;
  font-size: 0.76rem;
  font-style: italic;
  color: var(--color-ink-faint);
  line-height: 1.35;
}
.event-connector {
  position: absolute;
  left: 8px;
  width: 1px;
  background: var(--color-line-strong);
}
.event-row {
  position: absolute;
  left: 0;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  text-align: left;
  max-width: 100%;
}
.event-row__dot {
  width: 9px;
  height: 9px;
  min-width: 9px;
  border-radius: 50%;
  background: var(--cat-color);
  box-shadow: 0 0 0 3px var(--color-bg);
  margin-top: 4px;
}
.event-row__label {
  font-size: 0.78rem;
  line-height: 1.25;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  transition: background 0.15s;
  min-width: 0;
  flex: 1 1 auto;
  /* Wrap onto multiple lines by default — a label is only ever cut off with an
     ellipsis when render.js determines a neighboring event below would otherwise be
     crowded, via the --clamp-lines custom property (1 = old single-line behavior). */
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: var(--clamp-lines, 2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal;
  word-break: break-word;
}
/* On hover/focus, let a clamped label unfold to its full text over neighboring rows. */
.event-row:hover,
.event-row:focus-within {
  z-index: 4;
}
.event-row:hover .event-row__label,
.event-row:focus-visible .event-row__label {
  background: color-mix(in srgb, var(--cat-color) 22%, transparent);
  -webkit-line-clamp: unset;
  overflow: visible;
  box-shadow: var(--shadow-panel);
}
.event-row--legend .event-row__label {
  font-style: italic;
  color: var(--color-ink-soft);
}
.event-row__badge {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-style: normal;
  font-weight: 700;
  color: var(--cat-color);
}

/* Sticky column headers */
.track-headers {
  position: sticky;
  top: var(--header-height);
  height: 34px;
  z-index: 6;
  pointer-events: none;
}
.track-header {
  position: absolute;
  top: 0;
  left: 0;
  height: 34px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0 0.7rem;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cat-color);
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--color-line);
  pointer-events: auto;
  cursor: grab;
  user-select: none;
  touch-action: pan-y;
}
.track-header:active {
  cursor: grabbing;
}
.track-header--dragging {
  opacity: 0.35;
}

/* Column drag-to-reorder: a floating copy of the header follows the pointer, and a
   vertical guide shows where the column will land. Both are position:fixed so they
   stay put regardless of page scroll while a drag is in progress. */
.column-drag-ghost {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cat-color);
  background: var(--color-surface);
  border: 1px solid var(--cat-color);
  border-radius: 5px;
  box-shadow: var(--shadow-panel);
  pointer-events: none;
}
.column-drop-indicator {
  position: fixed;
  width: 3px;
  background: var(--color-accent);
  z-index: 79;
  pointer-events: none;
  border-radius: 2px;
}

/* ---------------- Minimap ---------------- */

.minimap {
  position: fixed;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: min(46vh, 360px);
  border: 1px solid var(--color-line-strong);
  border-radius: 6px;
  background: var(--color-surface);
  padding: 0;
  cursor: pointer;
  z-index: 30;
  overflow: hidden;
}
.minimap__track {
  position: relative;
  width: 100%;
  height: 100%;
}
.minimap__viewport {
  position: absolute;
  left: -2px;
  right: -2px;
  height: 6%;
  min-height: 10px;
  border: 2px solid var(--color-ink);
  border-radius: 4px;
  background: color-mix(in srgb, var(--color-ink) 15%, transparent);
  transform: translateY(-50%);
  pointer-events: none;
}
@media (max-width: 899px) {
  .minimap {
    display: none;
  }
}

/* ---------------- Return toast ---------------- */

.return-toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  z-index: 45;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: 0.6rem 0.6rem 0.6rem 1rem;
  border-radius: 6px;
  box-shadow: var(--shadow-panel);
  align-items: center;
  gap: 0.9rem;
  font-size: 0.82rem;
  max-width: 92vw;
}
.return-toast[hidden] {
  display: none;
}
.return-toast:not([hidden]) {
  display: flex;
}
.link-btn {
  background: none;
  border: 1px solid color-mix(in srgb, var(--color-bg) 40%, transparent);
  color: var(--color-bg);
  border-radius: 4px;
  padding: 0.35rem 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.link-btn:hover {
  background: color-mix(in srgb, var(--color-bg) 15%, transparent);
}

/* ---------------- Event panel ---------------- */

.panel-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, black 45%, transparent);
  z-index: 60;
}

.event-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(440px, 100vw);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
  z-index: 61;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.24s ease;
  padding: 3rem 1.6rem 2.5rem;
}
.event-panel--open {
  transform: translateX(0);
}
.panel-close {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
}

.panel-eyebrow {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--cat-color);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.7rem;
}
.legend-badge {
  margin-left: 0.4rem;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: color-mix(in srgb, var(--cat-color) 20%, transparent);
  font-size: 0.62rem;
  letter-spacing: 0.04em;
}
.panel-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.25;
  margin: 0 0 0.4rem;
}
.panel-date {
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  margin: 0 0 1.4rem;
}
.panel-figure {
  margin: 0 0 1.4rem;
}
.panel-figure img {
  display: block;
  width: 100%;
  max-height: 260px;
  object-fit: cover;
  border-radius: 5px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-line);
}
.panel-figure figcaption {
  margin-top: 0.4rem;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--color-ink-soft);
  font-style: italic;
}
.panel-figure__credit {
  font-style: normal;
  color: var(--color-ink-faint);
}
.panel-field {
  margin-bottom: 1.2rem;
}
.panel-field h3 {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-ink-faint);
  margin: 0 0 0.35rem;
}
.panel-field p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.6;
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.chip-link {
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  border-radius: 4px;
  padding: 0.3rem 0.55rem;
  font-size: 0.78rem;
  cursor: pointer;
}
.chip-link:hover {
  border-color: var(--color-accent);
}
.panel-meta {
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-line);
}
.panel-meta__row {
  display: flex;
  gap: 0.6rem;
  font-size: 0.78rem;
  margin-bottom: 0.35rem;
  color: var(--color-ink-soft);
}
.panel-meta__k {
  flex-shrink: 0;
  font-weight: 600;
  color: var(--color-ink-faint);
  min-width: 5.5rem;
}

@media (max-width: 640px) {
  .event-panel {
    width: 100%;
    top: auto;
    bottom: 0;
    height: min(85vh, 640px);
    border-radius: 14px 14px 0 0;
    transform: translateY(100%);
  }
  .event-panel--open {
    transform: translateY(0);
  }
}

/* ---------------- Site footer (links to About / Privacy Policy) ---------------- */

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-line);
  padding: 1.1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.3rem;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  background: var(--color-bg);
}
.site-footer a {
  color: var(--color-ink-soft);
  text-decoration: none;
}
.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--color-ink);
  text-decoration: underline;
}

/* ---------------- Simple content pages (About, Privacy Policy) ---------------- */
/* Deliberately plain static HTML, no JS — see about.html / privacy.html. */

.content-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.content-header {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--color-line);
}
.content-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--color-ink);
}
.content-header__brand .icon {
  color: var(--color-accent);
}
.content-header__brand-text {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.05rem;
}
.content-main {
  flex: 1;
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  padding: 2.6rem 1.5rem 4rem;
}
.content-main h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  margin: 0 0 0.4rem;
  color: var(--color-ink);
}
.content-main .content-meta {
  color: var(--color-ink-faint);
  font-size: 0.82rem;
  margin: 0 0 2.2rem;
}
.content-main h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.25rem;
  margin: 2.1rem 0 0.7rem;
  color: var(--color-ink);
}
.content-main p {
  color: var(--color-ink-soft);
  line-height: 1.65;
  margin: 0 0 1rem;
}
.content-main ul,
.content-main ol {
  color: var(--color-ink-soft);
  line-height: 1.65;
  margin: 0 0 1rem;
  padding-left: 1.3rem;
}
.content-main li {
  margin-bottom: 0.4rem;
}
.content-main strong {
  color: var(--color-ink);
}
.content-main a {
  color: var(--color-accent);
}
.content-main a:hover,
.content-main a:focus-visible {
  color: var(--color-ink);
}
.content-callout {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: 6px;
  padding: 1rem 1.2rem;
  margin: 1.6rem 0;
  box-shadow: var(--shadow-soft);
}
.content-callout p:last-child {
  margin-bottom: 0;
}

/* ---------------- Reduced motion ---------------- */

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}