:root {
  --bg: #000000;
  --fg: #f4f1ea;
  --fg-dim: #9a958c;
  --fg-mute: #6e6a63;
  --rule: #2a2a2a;
  --rule-strong: #4a4742;
  --note-bg: #0e0e0e;
  --font: "Source Serif 4", "Source Serif Pro", "Liberation Serif", Georgia, "Times New Roman", serif;
  --measure: 42rem;
  --nav-h: 3.25rem;
  --bar-h: 0px;
  --pad: 1.25rem;
}

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

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 18px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
}

body.is-book { --bar-h: 5.5rem; }
#now-playing.is-visible ~ * { /* bar is at the end, padding on body instead */ }
body:has(#now-playing.is-visible) { --bar-h: 5.5rem; }

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

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--fg); }

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  background: var(--fg);
  color: var(--bg);
  padding: 0.4rem 0.7rem;
  z-index: 100;
}
.skip-link:focus { top: 0.5rem; }

/* ───────── sticky nav ───────── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(0, 0, 0, 0.92);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(8px);
}

.topbar-inner {
  width: 100%;
  max-width: calc(var(--measure) + 8rem);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 var(--pad);
  min-height: var(--nav-h);
}

.topbar-inner nav {
  flex: 1;
  min-width: 0;
}

.brand {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--fg-dim);
  text-decoration: none;
}

#decade-nav-list {
  display: flex;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  flex: 1;
  min-width: 0; /* allow the row to shrink so Jump Back stays on screen */
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

#decade-nav-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  padding: 0.45rem 0.5rem;
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-dim);
  white-space: nowrap;
  border-bottom: 1px solid transparent;
}

#decade-nav-list a.is-current {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

#decade-nav-list a.is-empty {
  opacity: 0.35;
  pointer-events: none;
}

#decade-nav-list .count {
  font-size: 0.65rem;
  letter-spacing: 0;
  color: var(--fg-mute);
}

.top-actions { display: flex; align-items: center; gap: 0.35rem; flex-shrink: 0; }

.icon-btn,
.filter-chip,
.play-btn,
.text-btn,
.jump-item,
.np-btn {
  font-family: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--rule-strong);
  cursor: pointer;
  padding: 0.4rem 0.7rem;
}

.icon-btn:hover,
.filter-chip:hover,
.play-btn:hover,
.text-btn:hover,
.np-btn:hover,
.jump-item:hover {
  border-color: var(--fg);
}

.icon-btn { position: relative; }

/* ───────── jump menu ───────── */

.jump-wrap { position: relative; }

#jump-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  width: min(22rem, calc(100vw - 2rem));
  background: #000;
  border: 1px solid var(--rule-strong);
  padding: 0.75rem;
  z-index: 50;
}

#jump-menu ul { list-style: none; margin: 0; padding: 0; }
.jump-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
  text-align: left;
  gap: 0.15rem;
}
.jump-when { font-size: 0.75rem; color: var(--fg-dim); letter-spacing: 0.04em; text-transform: uppercase; }
.jump-empty { margin: 0; color: var(--fg-dim); font-size: 0.95rem; }

/* ───────── page ───────── */

.page {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.75rem var(--pad) calc(6rem + var(--bar-h));
}

.masthead { margin-bottom: 2.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--rule); }
.masthead h1 {
  font-weight: 400;
  font-size: clamp(1.85rem, 5vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
.masthead .lede {
  margin: 0;
  color: var(--fg-dim);
  font-style: italic;
}

#letter { margin-top: 1.75rem; }
#letter p { margin: 0 0 1rem; }
#letter p:last-child { margin-bottom: 0; font-style: italic; color: var(--fg-dim); }

#load-error {
  border: 1px solid var(--fg);
  padding: 1rem;
  margin: 1rem 0;
}

/* ───────── filters ───────── */

.filters-wrap {
  margin: 0 0 2.5rem;
}

.filters-wrap summary {
  cursor: pointer;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--fg-dim);
  list-style: none;
}
.filters-wrap summary::-webkit-details-marker { display: none; }
.filters-wrap summary::before { content: "Filter · "; }

#filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.filter-chip {
  text-transform: none;
  letter-spacing: 0.01em;
  font-size: 0.85rem;
  border-radius: 0;
  padding: 0.35rem 0.65rem;
}

.filter-chip[aria-pressed="true"] {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.filter-winterthur[aria-pressed="true"] {
  background: var(--fg);
  color: var(--bg);
}

/* ───────── chapters / entries ───────── */

.chapter { margin: 0 0 3.5rem; scroll-margin-top: calc(var(--nav-h) + 1rem); }

.chapter-head { margin: 0 0 1.75rem; }
.chapter-title {
  font-weight: 400;
  font-size: clamp(2rem, 7vw, 3.4rem);
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0 0 0.6rem;
}
.chapter-intro {
  margin: 0;
  font-style: italic;
  color: var(--fg-dim);
  max-width: 36rem;
}

.entry {
  display: grid;
  grid-template-columns: 4.2rem 1fr;
  gap: 0.9rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  scroll-margin-top: calc(var(--nav-h) + 1rem);
}
.entry:last-child { border-bottom: 1px solid var(--rule); }
.entry.is-playing { border-top-color: var(--fg); }

.play-btn {
  width: 4.2rem;
  padding: 0.45rem 0;
}
.play-btn.is-active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.entry-title {
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 1.3;
  margin: 0 0 0.35rem;
}
.entry-title cite { font-style: italic; }

.entry-meta {
  margin: 0 0 0.5rem;
  color: var(--fg-dim);
  font-size: 0.92rem;
}
.entry-meta .dot { margin: 0 0.4rem; color: var(--fg-mute); }
.origin-flag {
  display: inline-block;
  margin-left: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.68rem;
  border: 1px solid var(--rule-strong);
  padding: 0 0.3rem;
  color: var(--fg);
  vertical-align: 0.05em;
}

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0 0 0.85rem;
  padding: 0;
}
.tag {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.entry-context p { margin: 0 0 0.9rem; }

.personal-note {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem 0.85rem 1.1rem;
  border-left: 1px solid var(--fg);
  background: var(--note-bg);
  font-style: italic;
  color: #ddd9d0;
}
.personal-note .note-label {
  font-style: normal;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.68rem;
  color: var(--fg-dim);
  margin: 0 0 0.35rem;
}
.personal-note p:last-child { margin: 0; }

.entry-actions { margin: 0; }
.text-btn {
  border: 0;
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.15rem 0;
  margin-right: 1rem;
  letter-spacing: 0.06em;
}

.empty { color: var(--fg-dim); font-style: italic; }

.colophon {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  color: var(--fg-mute);
  font-size: 0.85rem;
}
.colophon p { margin: 0 0 0.5rem; }

/* ───────── now playing ───────── */

#now-playing {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  background: #000;
  border-top: 1px solid var(--rule-strong);
  padding: 0.7rem var(--pad) calc(0.7rem + env(safe-area-inset-bottom));
  display: none;
  gap: 0.6rem 1rem;
  align-items: center;
  flex-wrap: wrap;
}
#now-playing.is-visible { display: flex; }

#np-copy { flex: 1; min-width: 12rem; }
#np-title { margin: 0; font-size: 0.98rem; }
#np-source { margin: 0.15rem 0 0; font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--fg-dim); }
#np-source a { text-transform: none; letter-spacing: 0; }
#book-indicator { display: inline-block; margin-left: 0.5rem; letter-spacing: 0.1em; text-transform: uppercase; font-size: 0.68rem; }

#np-controls { display: flex; gap: 0.35rem; flex-wrap: wrap; }
#yt-slot { width: 100%; }
#yt-slot iframe {
  display: block;
  width: min(100%, 320px);
  height: 180px;
  background: #111;
  border: 1px solid var(--rule-strong);
}
#auth-btn { border-style: dashed; }

@media (max-width: 720px) {
  html { font-size: 17px; }
  .brand { display: none; }
  .entry { grid-template-columns: 1fr; gap: 0.6rem; }
  .play-btn { width: auto; }
  .chapter-title { font-size: 2.2rem; }
  .topbar-inner { padding-left: 0.6rem; padding-right: 0.6rem; }
  #decade-nav-list a { padding-left: 0.4rem; padding-right: 0.4rem; }
  .icon-btn { padding-left: 0.45rem; padding-right: 0.45rem; }
}