@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Playfair+Display:wght@500;600;700&display=swap');

/* EpochLex visual system
   Selected brand direction: editorial reference + AI-era digital signal.
   This layer intentionally overrides the earlier AILex-era visual tokens
   without changing the site's information architecture or interaction model. */

:root {
  --bg: #F5F2EC;
  --surface: #FBFAF7;
  --surface-2: #EAE6E0;
  --ink: #0F1D2D;
  --charcoal: #2B333B;
  --muted: #59636D;
  --line: #D8D3CB;
  --line-strong: #BFC3C4;
  --accent: #7A9276;
  --accent-strong: #60785E;
  --accent-soft: #E3E9E0;
  --accent-secondary: #5C8F95;
  --accent-secondary-soft: #E1EBEC;
  --paper: #F5F2EC;
  --warm-gray: #E4E0DB;
  --slate: #A7AEB3;
  --culture: #8B6FBD;
  --work: #4E9A8A;
  --systems: #507EA6;
  --risks: #B56F61;
  --shadow: 0 10px 28px rgba(15, 29, 45, .065);
  --shadow-raised: 0 16px 38px rgba(15, 29, 45, .09);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  --bg: #0B1723;
  --surface: #122231;
  --surface-2: #1A2A38;
  --ink: #F5F2EC;
  --charcoal: #D6DBDE;
  --muted: #B5BDC2;
  --line: #2B3B48;
  --line-strong: #42515D;
  --accent: #A2B59D;
  --accent-strong: #BDD0B8;
  --accent-soft: #24362C;
  --accent-secondary: #78AAB0;
  --accent-secondary-soft: #1C3439;
  --paper: #F5F2EC;
  --warm-gray: #35424C;
  --slate: #82909A;
  --culture: #A387CC;
  --work: #61B4A2;
  --systems: #6694BD;
  --risks: #CA7C6C;
  --shadow: 0 14px 34px rgba(0, 0, 0, .22);
  --shadow-raised: 0 22px 48px rgba(0, 0, 0, .28);
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
}

h1,
h2,
h3,
.term-name,
.brand,
.hero-quote,
.example,
.content-page h3 {
  font-family: var(--font-serif);
}

h1,
h2,
h3,
.term-name {
  color: var(--ink);
}

/* Header + brand */
.site-header {
  background: color-mix(in srgb, var(--bg) 94%, transparent);
  border-bottom-color: color-mix(in srgb, var(--line) 88%, transparent);
  box-shadow: 0 1px 0 rgba(15, 29, 45, .02);
}

.brand {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -.015em;
}

.brand-mark {
  color: var(--accent-secondary);
}

.primary-nav {
  font-weight: 600;
}

.primary-nav a {
  position: relative;
  color: var(--muted);
  transition: color .18s ease;
}

.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -9px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .18s ease;
}

.primary-nav a:hover,
.primary-nav a.active {
  color: var(--ink);
}

.primary-nav a.active::after {
  transform: scaleX(1);
}

.theme-toggle {
  border-radius: 999px;
}

.theme-toggle:hover {
  background: color-mix(in srgb, var(--surface-2) 70%, transparent);
}

.toggle-track {
  background: var(--surface-2);
  border-color: var(--line-strong);
}

.toggle-knob {
  background: var(--accent);
  box-shadow: 0 1px 3px rgba(15, 29, 45, .18);
}

/* Hero */
.hero,
.page-hero {
  background:
    radial-gradient(circle at 50% 18%, color-mix(in srgb, var(--accent) 6%, transparent), transparent 37%),
    var(--bg);
}

.technical-grid,
.page-hero::before {
  opacity: .18;
  background-image:
    linear-gradient(color-mix(in srgb, var(--slate) 28%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--slate) 28%, transparent) 1px, transparent 1px);
}

.hero-network {
  color: var(--accent-secondary);
  fill: var(--accent-secondary);
  stroke: var(--accent-secondary);
  opacity: .22;
}

.hero-wave {
  color: var(--accent-secondary);
  fill: none;
  stroke: var(--accent-secondary);
  stroke-width: 1;
  opacity: .22;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: .71rem;
  letter-spacing: .19em;
}

.hero h1,
.page-hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -.04em;
}

.lede {
  color: var(--muted);
  font-weight: 400;
}

.hero-stats {
  color: var(--accent-strong);
}

.hero-stats strong {
  color: var(--charcoal);
}

.hero-quote {
  border-color: var(--line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: var(--shadow);
}

.quote-mark,
.hero-quote small {
  color: var(--accent-strong);
}

/* Inputs + controls */
.search-wrap {
  border-color: var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.search-wrap:hover {
  border-color: color-mix(in srgb, var(--accent-secondary) 55%, var(--line-strong));
}

.search-wrap:focus-within {
  border-color: var(--accent-secondary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-secondary) 18%, transparent), var(--shadow);
}

.search-icon {
  border-color: var(--accent-secondary);
}

.search-icon::after {
  background: var(--accent-secondary);
}

#search {
  color: var(--ink);
  font-family: var(--font-sans);
}

#search::placeholder {
  color: color-mix(in srgb, var(--muted) 82%, transparent);
}

kbd {
  background: var(--surface-2);
  border-color: var(--line);
  color: var(--muted);
}

.filter,
.mobile-filter-toggle,
.mobile-filter-option,
.view-button,
.alpha-nav button,
.pronunciation-button,
.browse-pronunciation-button {
  font-family: var(--font-sans);
}

.filter {
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--muted);
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: none;
  transition: background .18s ease, border-color .18s ease, color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.filter:hover {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.filter.active {
  color: var(--ink);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line-strong));
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 16%, transparent);
}

.filter.all .category-icon {
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.filter.culture .category-icon {
  color: var(--culture);
  background: color-mix(in srgb, var(--culture) 13%, transparent);
}

.filter.work .category-icon {
  color: var(--work);
  background: color-mix(in srgb, var(--work) 13%, transparent);
}

.filter.systems .category-icon {
  color: var(--systems);
  background: color-mix(in srgb, var(--systems) 13%, transparent);
}

.filter.risks .category-icon {
  color: var(--risks);
  background: color-mix(in srgb, var(--risks) 13%, transparent);
}

.view-toggle {
  border-radius: 10px;
  border-color: var(--line);
  background: var(--surface);
}

.view-button {
  color: var(--muted);
}

.view-button:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.view-button.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.alpha-nav button {
  color: var(--muted);
  transition: background .18s ease, color .18s ease;
}

.alpha-nav button:hover,
.alpha-nav button:focus-visible {
  color: var(--ink);
  background: var(--accent-soft);
}

/* Dictionary cards */
.dictionary-meta {
  border-bottom-color: var(--line);
}

.browse-label,
.letter-heading {
  color: var(--charcoal);
  letter-spacing: .15em;
}

.letter-heading {
  font-family: var(--font-sans);
}

.letter-heading::before {
  color: var(--muted);
}

.entry,
.category-card {
  border-color: var(--line);
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: 0 3px 14px rgba(15, 29, 45, .035);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.entry:hover,
.category-card:hover {
  border-color: color-mix(in srgb, var(--accent-secondary) 34%, var(--line));
  box-shadow: var(--shadow);
}

.term-name {
  font-weight: 600;
  letter-spacing: -.022em;
}

.term-name a {
  text-decoration-thickness: 1px;
  text-underline-offset: .15em;
  text-decoration-color: transparent;
  transition: color .18s ease, text-decoration-color .18s ease;
}

.term-name a:hover {
  color: var(--accent-strong);
  text-decoration-color: color-mix(in srgb, var(--accent) 60%, transparent);
}

.pronunciation,
.part-of-speech,
.example,
.aliases,
#result-count {
  color: var(--muted);
}

.entry-label {
  color: var(--term-accent);
}

.pill {
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface-2) 74%, transparent);
  color: var(--charcoal);
}

.status-pill {
  background: transparent;
}

/* Content pages */
.content-page {
  font-family: var(--font-sans);
}

.content-page h2,
.content-page h3,
.category-card h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -.018em;
}

.content-page p,
.content-page li,
.category-card p {
  color: var(--muted);
}

.content-page a {
  color: var(--accent-strong);
  text-decoration-color: color-mix(in srgb, var(--accent) 48%, transparent);
  text-underline-offset: .18em;
}

.content-page a:hover {
  color: var(--ink);
}

/* Footer */
.site-footer {
  border-top-color: var(--line);
  background: color-mix(in srgb, var(--surface-2) 36%, transparent);
}

.footer-mark {
  color: var(--accent-secondary);
}

/* Mobile surfaces */
.mobile-filter-toggle {
  border-color: var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.mobile-filter-menu {
  border-color: var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
}

.mobile-filter-option {
  color: var(--muted);
}

.mobile-filter-option:hover,
.mobile-filter-option:focus-visible {
  background: var(--surface-2);
  color: var(--ink);
}

.mobile-filter-option[aria-current="true"] {
  background: var(--accent-soft);
  color: var(--ink);
}

.mobile-filter-dot {
  background: var(--accent);
}

.mobile-nav-toggle {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius-md);
}

.mobile-nav-panel {
  border-color: var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-raised);
}

.mobile-primary-nav a {
  color: var(--muted);
  border-radius: var(--radius-sm);
}

.mobile-primary-nav a:hover,
.mobile-primary-nav a.active {
  color: var(--ink);
  background: var(--accent-soft);
}

/* Focus treatment aligned to the brand's blue-green technical accent. */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline-color: var(--accent-secondary);
}

@media (max-width: 680px) {
  .hero-copy h1 {
    font-family: var(--font-serif);
    font-weight: 600;
  }

  .mobile-browse-controls .search-wrap {
    border-radius: var(--radius-md);
  }

  .entry,
  .category-card {
    border-radius: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .primary-nav a::after,
  .filter,
  .entry,
  .category-card,
  .term-name a {
    transition: none;
  }
}


/* Production EpochLex masthead lockup */
.brand { min-width: 0; }
.brand-lockup { display:block; width:clamp(160px,18vw,230px); line-height:0; }
.brand-lockup-image { display:block; width:100%; height:auto; }
.brand-lockup-dark { display:none; }
html[data-theme="dark"] .brand-lockup-light { display:none; }
html[data-theme="dark"] .brand-lockup-dark { display:block; }
@media (max-width:680px){ .brand-lockup { width:158px; } }


/* Semantic category filters: restore the four editorial colors. */
.filter.all { --filter-color: var(--accent-secondary); }
.filter.culture { --filter-color: var(--culture); }
.filter.work { --filter-color: var(--work); }
.filter.systems { --filter-color: var(--systems); }
.filter.risks { --filter-color: var(--risks); }

.filter .category-icon {
  color: var(--filter-color);
  background: color-mix(in srgb, var(--filter-color) 18%, transparent);
}

.filter:hover {
  border-color: color-mix(in srgb, var(--filter-color) 48%, var(--line-strong));
}

.filter.active {
  color: var(--ink);
  border-color: color-mix(in srgb, var(--filter-color) 72%, var(--line-strong));
  background: color-mix(in srgb, var(--filter-color) 15%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--filter-color) 24%, transparent);
}

.filter.active .category-icon {
  color: var(--filter-color);
  background: color-mix(in srgb, var(--filter-color) 24%, transparent);
}

.mobile-filter-option[data-key="all"],
.mobile-filter-toggle[data-key="all"] { --filter-color: var(--accent-secondary); }
.mobile-filter-option[data-key="culture"],
.mobile-filter-toggle[data-key="culture"] { --filter-color: var(--culture); }
.mobile-filter-option[data-key="work"],
.mobile-filter-toggle[data-key="work"] { --filter-color: var(--work); }
.mobile-filter-option[data-key="systems"],
.mobile-filter-toggle[data-key="systems"] { --filter-color: var(--systems); }
.mobile-filter-option[data-key="risks"],
.mobile-filter-toggle[data-key="risks"] { --filter-color: var(--risks); }

.mobile-filter-option .mobile-filter-dot {
  background: var(--filter-color, var(--accent-secondary));
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--filter-color, var(--accent-secondary)) 15%, transparent);
}

.mobile-filter-option[aria-current="true"] {
  background: color-mix(in srgb, var(--filter-color) 15%, var(--surface));
  color: var(--ink);
  box-shadow: inset 3px 0 0 var(--filter-color);
}

.mobile-filter-toggle[data-key] {
  border-color: color-mix(in srgb, var(--filter-color) 55%, var(--line-strong));
  box-shadow: inset 3px 0 0 var(--filter-color), var(--shadow);
}