/* Update history page: lower (dark) + upper (light) side by side. */

:root {
  --lbg: #100e0c;
  --lpanel: #1a1612;
  --lline: #3a3128;
  --link: #ece4d3;
  --lsoft: #c8beac;
  --lmuted: #8e8272;
  --lgold: #c9a35c;
  --lserif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;

  --ubg1: #fbfdff;
  --ubg2: #edf5fc;
  --ucard: rgba(255, 255, 255, 0.82);
  --uink: #24323f;
  --usoft: #41576b;
  --umuted: #6b8094;
  --uline: rgba(78, 112, 146, 0.18);
  --ugold: #b8893f;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--lserif);
  line-height: 1.8;
}

html[data-from="lower"] body {
  color: var(--link);
  background: radial-gradient(1200px 600px at 50% -10%, #191612 0%, var(--lbg) 55%);
}

html[data-from="upper"] body {
  color: var(--uink);
  background: linear-gradient(180deg, var(--ubg1), var(--ubg2));
}

html[data-from="lower"] .upper-bar { display: none; }
html[data-from="upper"] .lower-bar { display: none; }

/* ---------- lower top bar ---------- */
.lower-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(58, 49, 40, 0.75);
  background: rgba(16, 14, 12, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.lower-bar .inner {
  max-width: 1180px;
  height: 64px;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.lower-bar .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--lserif);
  letter-spacing: 0.16em;
  white-space: nowrap;
  text-decoration: none;
  color: var(--link);
}
.lower-bar .mark {
  position: relative;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid #8f7440;
  color: var(--lgold);
  font-size: 17px;
  line-height: 1;
}
.lower-bar .mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(201, 163, 92, 0.28);
}
.lower-bar .brand-text { font-size: 15px; color: var(--link); }
.lower-bar .nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.lower-bar .nav a {
  padding: 8px 13px;
  font-size: 13px;
  letter-spacing: 0.09em;
  color: var(--lmuted);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.lower-bar .nav a:hover { color: var(--link); }
.lower-bar .nav a.active {
  color: var(--lgold);
  background: rgba(201, 163, 92, 0.07);
  border-color: rgba(201, 163, 92, 0.22);
}

/* ---------- upper top bar ---------- */
.upper-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 28px 8px;
  font-size: 14px;
  color: var(--uink);
}
.upper-bar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: inherit;
}
.upper-bar .mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 2px solid var(--ugold);
  border-radius: 50%;
  color: var(--ugold);
  font-size: 15px;
}
.upper-bar .mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(184, 137, 63, 0.55);
  border-radius: 50%;
}
.upper-bar .nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; color: var(--usoft); }
.upper-bar .nav a { text-decoration: none; color: inherit; }
.upper-bar .nav a:hover { color: var(--ugold); }
.upper-bar .nav a.active { color: var(--ugold); }
.upper-bar .nav .lang {
  padding: 4px 10px;
  border: 1px solid rgba(78, 112, 146, 0.32);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--umuted);
}

/* ---------- content ---------- */
.hist-wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 54px 28px 90px;
}
.hist-kicker {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.72;
}
.hist-title {
  margin: 8px 0 6px;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.3;
}
.hist-sub {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.62;
}
html[data-from="lower"] .hist-title { color: var(--link); }
html[data-from="lower"] .hist-sub { color: var(--lmuted); }
html[data-from="upper"] .hist-title { color: var(--uink); }
html[data-from="upper"] .hist-sub { color: var(--umuted); }

.hist-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 34px;
}
.hist-col {
  padding: 28px 28px 30px;
  min-height: 230px;
}
.hist-lower {
  background: var(--lpanel);
  border: 1px solid var(--lline);
  color: var(--link);
}
.hist-upper {
  background: var(--ucard);
  border: 1px solid var(--uline);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(64, 106, 148, 0.13);
  color: var(--uink);
}
.hist-lower .hist-kicker { color: var(--lgold); }
.hist-upper .hist-kicker { color: var(--ugold); }
.hist-date {
  margin-top: 14px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
}
.hist-lower .hist-date { color: var(--lgold); }
.hist-upper .hist-date { color: var(--ugold); }
.hist-col p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.95;
}
.hist-lower p { color: var(--lsoft); }
.hist-upper p { color: var(--usoft); }

@media (max-width: 860px) {
  .hist-grid { grid-template-columns: 1fr; }
  .lower-bar .inner { height: auto; padding: 12px 18px; flex-wrap: wrap; }
  .lower-bar .nav { gap: 2px; }
  .upper-bar { flex-wrap: wrap; }
  .hist-wrap { padding: 38px 18px 70px; }
  .hist-title { font-size: 28px; }
}

/* newest entry: full-width card spanning both columns */
.hist-wide {
  grid-column: 1 / -1;
  min-height: 0;
  padding: 26px 30px 30px;
}
html[data-from="lower"] .hist-wide {
  background: linear-gradient(180deg, #221d18, var(--lpanel));
  border: 1px solid rgba(201, 163, 92, 0.42);
  color: var(--link);
}
html[data-from="upper"] .hist-wide {
  background: var(--ucard);
  border: 1px solid rgba(184, 137, 63, 0.35);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(64, 106, 148, 0.13);
  color: var(--uink);
}
html[data-from="lower"] .hist-wide .hist-kicker,
html[data-from="lower"] .hist-wide .hist-date { color: var(--lgold); }
html[data-from="upper"] .hist-wide .hist-kicker,
html[data-from="upper"] .hist-wide .hist-date { color: var(--ugold); }
html[data-from="lower"] .hist-wide p { color: var(--lsoft); }
html[data-from="upper"] .hist-wide p { color: var(--usoft); }

/* language pill on the dark (lower) bar */
.lower-bar .nav .lang {
  padding: 5px 13px;
  border: 1px solid rgba(201, 163, 92, 0.45);
  border-radius: 999px;
  font-size: 12px;
  color: var(--lsoft);
}
.lower-bar .nav .lang:hover { color: var(--lgold); border-color: rgba(201, 163, 92, 0.75); }