@import url('./tokens.css');

/* ====================================================================
   Base
   ==================================================================== */

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--tt-bg);
  color: var(--tt-fg);
  font-family: var(--tt-font-body);
  font-size: var(--tt-fs-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

img, video, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--tt-gold); text-decoration: none; }
a:hover { color: var(--tt-gold-bright); }

::selection { background: var(--tt-gold); color: var(--tt-navy); }

h1, h2, h3, h4 {
  font-family: var(--tt-font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.08;
  margin: 0 0 var(--tt-sp-4);
  color: var(--tt-bone);
}

h1 { font-size: var(--tt-fs-4xl); }
h2 { font-size: var(--tt-fs-3xl); letter-spacing: 0.04em; }
h3 { font-size: var(--tt-fs-xl); letter-spacing: 0.03em; }
h4 { font-size: var(--tt-fs-md); font-family: var(--tt-font-body); font-weight: 600; letter-spacing: 0; }

p { margin: 0 0 var(--tt-sp-4); color: var(--tt-fg-dim); }

.container {
  width: 100%;
  max-width: var(--tt-max);
  margin: 0 auto;
  padding-left: var(--tt-gutter);
  padding-right: var(--tt-gutter);
}

.section {
  padding: var(--tt-sp-9) 0;
}

.section-head {
  text-align: center;
  margin-bottom: var(--tt-sp-8);
}

.eyebrow {
  display: inline-block;
  font-family: var(--tt-font-body);
  font-size: var(--tt-fs-xs);
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--tt-gold);
  margin-bottom: var(--tt-sp-3);
}

.lead {
  max-width: 56ch;
  margin: 0 auto;
  font-size: var(--tt-fs-md);
  color: var(--tt-fg-dim);
}

/* ====================================================================
   Top Nav
   ==================================================================== */

.nav {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(14,23,48,0.65);
  border-bottom: 1px solid var(--tt-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--tt-sp-3) var(--tt-gutter);
  max-width: var(--tt-max);
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--tt-sp-3);
  font-family: var(--tt-font-display);
  font-size: var(--tt-fs-md);
  letter-spacing: 0.18em;
  color: var(--tt-bone);
}

.nav-brand img { height: 36px; width: auto; }
.nav-brand .word { display: none; }
@media (min-width: 480px) { .nav-brand .word { display: inline; } }

.nav-links {
  display: none;
  gap: var(--tt-sp-6);
  list-style: none;
  padding: 0; margin: 0;
}
.nav-links a {
  color: var(--tt-fg-dim);
  font-size: var(--tt-fs-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--tt-bone); }
@media (min-width: 900px) { .nav-links { display: flex; } }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--tt-sp-2);
  padding: 10px 18px;
  border-radius: var(--tt-r-pill);
  background: var(--tt-gold);
  color: var(--tt-navy);
  font-weight: 700;
  font-size: var(--tt-fs-sm);
  letter-spacing: 0.04em;
  border: 1px solid var(--tt-gold-deep);
  transition: transform var(--tt-dur) var(--tt-ease), box-shadow var(--tt-dur) var(--tt-ease);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: var(--tt-shadow-cta); color: var(--tt-navy); }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--tt-sp-2);
  padding: 16px 28px;
  border-radius: var(--tt-r-pill);
  font-family: var(--tt-font-body);
  font-weight: 700;
  font-size: var(--tt-fs-md);
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--tt-dur) var(--tt-ease), box-shadow var(--tt-dur) var(--tt-ease), background var(--tt-dur) var(--tt-ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--tt-gold);
  color: var(--tt-navy);
  border-color: var(--tt-gold-deep);
  box-shadow: var(--tt-shadow-cta);
}
.btn-primary:hover { transform: translateY(-2px); background: var(--tt-gold-bright); color: var(--tt-navy); }

.btn-ghost {
  background: transparent;
  color: var(--tt-bone);
  border-color: var(--tt-border-strong);
}
.btn-ghost:hover { background: rgba(255,217,124,0.08); color: var(--tt-bone); }

.btn-lg { padding: 20px 36px; font-size: var(--tt-fs-lg); }

/* ====================================================================
   Hero (LP-02)
   ==================================================================== */

.hero {
  position: relative;
  min-height: clamp(640px, 92vh, 1000px);
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  border-bottom: 1px solid var(--tt-border);
}

.hero-bg, .hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

/* CSS gradient fallback if video fails / not present */
.hero-bg {
  background:
    radial-gradient(ellipse at 30% 30%, #233265 0%, transparent 55%),
    radial-gradient(ellipse at 80% 70%, #2a1d3f 0%, transparent 60%),
    linear-gradient(180deg, #050a1c 0%, #0E1730 60%, #050a1c 100%);
  animation: heroDrift 24s var(--tt-ease) infinite alternate;
}

@keyframes heroDrift {
  from { background-position: 0% 0%, 100% 100%, 0% 0%; }
  to   { background-position: 100% 100%, 0% 0%, 100% 100%; }
}

.hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(14,23,48,0.55) 0%, rgba(14,23,48,0.78) 60%, rgba(14,23,48,0.96) 100%),
    radial-gradient(ellipse at 50% 110%, rgba(255,217,124,0.16), transparent 60%);
  z-index: -1;
}

.hero-inner {
  width: 100%;
  text-align: center;
  padding: var(--tt-sp-10) 0 var(--tt-sp-9);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--tt-sp-2);
  padding: 8px 14px;
  border-radius: var(--tt-r-pill);
  background: rgba(255,217,124,0.10);
  border: 1px solid var(--tt-border-strong);
  color: var(--tt-gold);
  font-size: var(--tt-fs-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: var(--tt-sp-6);
}

.hero h1 {
  font-size: clamp(48px, 9vw, var(--tt-fs-5xl));
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: linear-gradient(180deg, #FFE7A8 0%, #FFD97C 55%, #C49A3D 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 40px rgba(255,217,124,0.18);
  margin-bottom: var(--tt-sp-5);
}

.hero-sub {
  font-size: clamp(var(--tt-fs-md), 2.4vw, var(--tt-fs-lg));
  color: var(--tt-fg-dim);
  max-width: 36ch;
  margin: 0 auto var(--tt-sp-7);
}

.hero-actions {
  display: flex;
  gap: var(--tt-sp-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: var(--tt-sp-6);
  display: flex;
  justify-content: center;
  gap: var(--tt-sp-6);
  flex-wrap: wrap;
  color: var(--tt-fg-muted);
  font-size: var(--tt-fs-sm);
}
.hero-meta span::before { content: "✦  "; color: var(--tt-gold); }

/* Scroll cue */
.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  width: 22px; height: 36px;
  border: 1px solid var(--tt-border-strong);
  border-radius: 12px;
  display: flex; justify-content: center; align-items: flex-start;
}
.scroll-cue::after {
  content: "";
  width: 3px; height: 8px;
  background: var(--tt-gold);
  margin-top: 6px;
  border-radius: 2px;
  animation: cueDrop 1.6s var(--tt-ease) infinite;
}
@keyframes cueDrop {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ====================================================================
   Features (LP-03)
   ==================================================================== */

.features-grid {
  display: grid;
  gap: var(--tt-sp-5);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }

.feature {
  background: linear-gradient(180deg, rgba(255,217,124,0.04), rgba(255,217,124,0.00) 70%), var(--tt-bg-elev);
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg);
  padding: var(--tt-sp-6);
  transition: transform var(--tt-dur) var(--tt-ease), border-color var(--tt-dur) var(--tt-ease);
}
.feature:hover { transform: translateY(-4px); border-color: var(--tt-border-strong); }

.feature-ico {
  width: 44px; height: 44px;
  border-radius: var(--tt-r-md);
  background: rgba(255,217,124,0.10);
  border: 1px solid var(--tt-border-strong);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--tt-sp-4);
  color: var(--tt-gold);
}
.feature h3 {
  font-family: var(--tt-font-body);
  font-size: var(--tt-fs-md);
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: var(--tt-sp-2);
}
.feature p { font-size: var(--tt-fs-sm); margin: 0; }

/* ====================================================================
   Eras gallery (LP-04)
   ==================================================================== */

.epoch-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--tt-sp-2);
  justify-content: center;
  margin-bottom: var(--tt-sp-7);
}
.epoch-tab {
  padding: 8px 16px;
  border-radius: var(--tt-r-pill);
  border: 1px solid var(--tt-border);
  background: transparent;
  color: var(--tt-fg-dim);
  font-family: var(--tt-font-body);
  font-size: var(--tt-fs-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--tt-dur) var(--tt-ease);
}
.epoch-tab:hover { color: var(--tt-bone); border-color: var(--tt-border-strong); }
.epoch-tab[aria-pressed="true"] {
  background: var(--tt-gold);
  color: var(--tt-navy);
  border-color: var(--tt-gold-deep);
}

.eras-grid {
  display: grid;
  gap: var(--tt-sp-4);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 640px) { .eras-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 980px) { .eras-grid { grid-template-columns: repeat(4, 1fr); } }

.era-card {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--tt-r-md);
  overflow: hidden;
  background: var(--tt-bg-elev) center/cover;
  border: 1px solid var(--tt-border);
  cursor: pointer;
  transition: transform var(--tt-dur) var(--tt-ease), border-color var(--tt-dur) var(--tt-ease);
}
.era-card:hover { transform: translateY(-3px) scale(1.01); border-color: var(--tt-border-strong); }
.era-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(14,23,48,0.92) 100%);
}
.era-card .meta {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--tt-sp-4);
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.era-card .year {
  font-size: var(--tt-fs-xs);
  letter-spacing: 0.18em;
  color: var(--tt-gold);
  text-transform: uppercase;
  font-weight: 600;
}
.era-card .name {
  font-family: var(--tt-font-display);
  font-size: var(--tt-fs-md);
  letter-spacing: 0.04em;
  color: var(--tt-bone);
}

.era-card .lock {
  position: absolute;
  top: 12px; right: 12px;
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(14,23,48,0.7);
  border: 1px solid var(--tt-border-strong);
  font-size: 13px;
  z-index: 2;
}

/* Pure-CSS fallback artwork when JPG missing */
.era-card.placeholder {
  background:
    radial-gradient(circle at 30% 25%, var(--era-c1, #2A3464) 0%, transparent 55%),
    radial-gradient(circle at 80% 80%, var(--era-c2, #4A2C5E) 0%, transparent 60%),
    linear-gradient(160deg, var(--era-c3, #0E1730) 0%, #050a1c 100%);
}

/* ====================================================================
   Pricing (LP-05)
   ==================================================================== */

.pricing-grid {
  display: grid;
  gap: var(--tt-sp-5);
  grid-template-columns: 1fr;
}
@media (min-width: 820px) { .pricing-grid { grid-template-columns: repeat(3, 1fr); } }

.tier {
  background: var(--tt-bg-elev);
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-lg);
  padding: var(--tt-sp-7) var(--tt-sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--tt-sp-4);
  position: relative;
  transition: transform var(--tt-dur) var(--tt-ease);
}
.tier:hover { transform: translateY(-4px); }

.tier.featured {
  border-color: var(--tt-gold);
  background: linear-gradient(180deg, rgba(255,217,124,0.06), rgba(255,217,124,0)) , var(--tt-bg-elev);
  box-shadow: 0 8px 32px rgba(255,217,124,0.12);
}
.tier-badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--tt-gold);
  color: var(--tt-navy);
  font-size: var(--tt-fs-xs);
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--tt-r-pill);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.tier h3 {
  font-family: var(--tt-font-display);
  font-size: var(--tt-fs-lg);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tt-gold);
  margin: 0;
}
.tier-price {
  font-family: var(--tt-font-display);
  font-size: var(--tt-fs-3xl);
  color: var(--tt-bone);
  letter-spacing: 0.02em;
}
.tier-price small {
  font-family: var(--tt-font-body);
  font-size: var(--tt-fs-sm);
  color: var(--tt-fg-muted);
  font-weight: 500;
  margin-left: 4px;
}
.tier-desc { color: var(--tt-fg-dim); font-size: var(--tt-fs-sm); margin: 0; }

.tier ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--tt-sp-4);
  display: flex; flex-direction: column;
  gap: var(--tt-sp-2);
}
.tier li {
  font-size: var(--tt-fs-sm);
  color: var(--tt-fg-dim);
  display: flex; align-items: flex-start; gap: 10px;
}
.tier li::before {
  content: "";
  flex: 0 0 18px;
  height: 18px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFD97C' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/contain no-repeat;
  margin-top: 1px;
}

/* ====================================================================
   FAQ (LP-06)
   ==================================================================== */

.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--tt-sp-3); }
.faq {
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-md);
  background: var(--tt-bg-elev);
  overflow: hidden;
  transition: border-color var(--tt-dur) var(--tt-ease);
}
.faq[open] { border-color: var(--tt-border-strong); }
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: var(--tt-sp-4) var(--tt-sp-5);
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600;
  font-size: var(--tt-fs-md);
  color: var(--tt-bone);
  font-family: var(--tt-font-body);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--tt-gold);
  font-size: 24px;
  font-weight: 300;
  transition: transform var(--tt-dur) var(--tt-ease);
}
.faq[open] summary::after { transform: rotate(45deg); }
.faq-body {
  padding: 0 var(--tt-sp-5) var(--tt-sp-5);
  color: var(--tt-fg-dim);
  font-size: var(--tt-fs-sm);
  line-height: 1.65;
}

/* ====================================================================
   Footer (LP-07)
   ==================================================================== */

.footer {
  border-top: 1px solid var(--tt-border);
  padding: var(--tt-sp-8) 0 var(--tt-sp-6);
  margin-top: var(--tt-sp-9);
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.25) 100%);
}
.footer-grid {
  display: grid;
  gap: var(--tt-sp-6);
  grid-template-columns: 1fr;
}
@media (min-width: 820px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.footer-brand p { color: var(--tt-fg-muted); font-size: var(--tt-fs-sm); max-width: 36ch; margin-top: var(--tt-sp-3); }
.footer h4 {
  font-size: var(--tt-fs-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--tt-gold);
  margin-bottom: var(--tt-sp-3);
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.footer ul a { color: var(--tt-fg-dim); font-size: var(--tt-fs-sm); }
.footer ul a:hover { color: var(--tt-bone); }

.footer-bottom {
  margin-top: var(--tt-sp-7);
  padding-top: var(--tt-sp-4);
  border-top: 1px solid var(--tt-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--tt-sp-3);
  color: var(--tt-fg-muted);
  font-size: var(--tt-fs-xs);
}

/* ====================================================================
   Cookie banner / Age gate banner
   ==================================================================== */

.banner {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  width: min(620px, calc(100% - 32px));
  z-index: 100;
  background: rgba(14,23,48,0.96);
  backdrop-filter: blur(12px);
  border: 1px solid var(--tt-border-strong);
  border-radius: var(--tt-r-lg);
  padding: var(--tt-sp-4) var(--tt-sp-5);
  box-shadow: 0 16px 48px rgba(0,0,0,0.55);
  display: flex; align-items: center; gap: var(--tt-sp-4);
  flex-wrap: wrap;
  font-size: var(--tt-fs-sm);
  color: var(--tt-fg);
  animation: bannerIn .4s var(--tt-ease) both;
}
.banner.bottom { bottom: 16px; }
.banner.top    { top: 16px; }
.banner p { flex: 1 1 240px; margin: 0; color: var(--tt-fg-dim); }
.banner-actions { display: flex; gap: var(--tt-sp-2); }
.banner-actions button {
  border: 1px solid var(--tt-border-strong);
  background: transparent;
  color: var(--tt-bone);
  padding: 8px 14px;
  border-radius: var(--tt-r-pill);
  font-weight: 600;
  cursor: pointer;
  font-size: var(--tt-fs-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all var(--tt-dur) var(--tt-ease);
}
.banner-actions button.primary { background: var(--tt-gold); color: var(--tt-navy); border-color: var(--tt-gold-deep); }
.banner-actions button:hover { transform: translateY(-1px); }

@keyframes bannerIn {
  from { opacity: 0; transform: translate(-50%, 12px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ====================================================================
   Reveal-on-scroll utility (used by scripts/reveal.js)
   ==================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--tt-dur-slow) var(--tt-ease), transform var(--tt-dur-slow) var(--tt-ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ====================================================================
   Visually hidden
   ==================================================================== */

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

/* ====================================================================
   My Vlogs page specific
   ==================================================================== */

.vlogs-grid {
  display: grid;
  gap: var(--tt-sp-4);
  grid-template-columns: 1fr;
}
@media (min-width: 560px) { .vlogs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .vlogs-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1200px){ .vlogs-grid { grid-template-columns: repeat(4, 1fr); } }

.vlog-card {
  position: relative;
  aspect-ratio: 9/16;
  border-radius: var(--tt-r-md);
  overflow: hidden;
  background: var(--tt-bg-elev);
  border: 1px solid var(--tt-border);
  cursor: pointer;
  transition: transform var(--tt-dur) var(--tt-ease);
}
.vlog-card:hover { transform: translateY(-3px); }
.vlog-card::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(14,23,48,0.92) 100%);
}
.vlog-card .meta {
  position: absolute;
  inset: auto 0 0 0;
  padding: var(--tt-sp-3);
  z-index: 2;
  display: flex; justify-content: space-between; align-items: flex-end;
  color: var(--tt-bone);
}
.vlog-card .meta .when { font-size: var(--tt-fs-xs); color: var(--tt-fg-dim); }
.vlog-card .meta .era  { font-family: var(--tt-font-display); font-size: var(--tt-fs-sm); letter-spacing: 0.06em; }
.vlog-card .duration {
  position: absolute;
  top: 10px; left: 10px;
  background: rgba(14,23,48,0.78);
  border: 1px solid var(--tt-border);
  padding: 4px 8px;
  border-radius: var(--tt-r-sm);
  font-size: var(--tt-fs-xs);
  color: var(--tt-bone);
  z-index: 2;
}

.vlogs-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--tt-sp-9) var(--tt-sp-5);
  color: var(--tt-fg-muted);
  border: 1px dashed var(--tt-border-strong);
  border-radius: var(--tt-r-lg);
}

/* ====================================================================
   Collapsible epoch sections (UI-09)
   These classes are exported for the actual app's era picker too.
   ==================================================================== */

.epoch-section { margin-bottom: var(--tt-sp-5); }
.epoch-section > summary {
  cursor: pointer;
  list-style: none;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--tt-sp-3) var(--tt-sp-4);
  background: var(--tt-bg-elev);
  border: 1px solid var(--tt-border);
  border-radius: var(--tt-r-md);
  font-family: var(--tt-font-body);
  font-weight: 600;
  font-size: var(--tt-fs-sm);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--tt-bone);
}
.epoch-section > summary::-webkit-details-marker { display: none; }
.epoch-section > summary::after {
  content: "▾";
  color: var(--tt-gold);
  transition: transform var(--tt-dur) var(--tt-ease);
}
.epoch-section[open] > summary::after { transform: rotate(180deg); }

.epoch-section .epoch-count {
  display: inline-block;
  margin-left: var(--tt-sp-2);
  color: var(--tt-fg-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.epoch-section .epoch-eras {
  margin-top: var(--tt-sp-3);
}