:root {
  color-scheme: light;
  /* Soft Structuralism — light, calm, premium: silver-grey canvas, white cards
     floating on ultra-soft diffused shadows, massive Sora display, Inter body,
     Geist Mono labels, a single muted-emerald accent. */
  --paper: #eef0f1;
  --card: #ffffff;
  --ink: #1a1d21;
  --muted: #5b626a;
  --faint: #8b929a;
  --line: #e3e6e8;
  --accent: #2e7d6b;
  --accent-soft: #dbeee8;
  --accent-ink: #ffffff;
  --focus: #2e7d6b;
  --card-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --shadow-soft: 0 28px 60px -34px rgba(34, 52, 46, 0.45), 0 8px 22px -16px rgba(34, 52, 46, 0.22);
  --shadow-lift: 0 44px 90px -52px rgba(34, 52, 46, 0.5), 0 14px 32px -20px rgba(34, 52, 46, 0.26);
  --scrim: rgba(247, 248, 249, 0.82);
  --font-display: "Sora", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --maxw: 46rem;
}

* {
  box-sizing: border-box;
}

html {
  background-color: var(--paper);
  scroll-behavior: smooth;
}

/* Reading progress bar */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 100;
  pointer-events: none;
  transition: transform 0.1s linear;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(60rem 40rem at 50% -12%, rgba(255, 255, 255, 0.7), transparent 60%);
  background-attachment: fixed;
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.serif {
  font-family: var(--font-display);
}

a {
  color: var(--ink);
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-color: var(--accent);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3.5rem;
  z-index: 50;
  padding: 0.6rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: top 120ms ease;
}

.skip-link:focus {
  top: 1rem;
}

.wrap {
  width: min(var(--maxw), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Masthead */
.masthead {
  padding-top: 3.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.25rem;
}

.masthead__brand {
  display: inline-block;
  text-decoration: none;
}

.masthead__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
  text-wrap: balance;
}

.masthead__tagline {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 34rem;
  text-wrap: pretty;
}

.nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

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

.nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* Digest content */
main {
  padding-bottom: 4rem;
}

.digest__header {
  margin-bottom: 2rem;
}

.digest__date {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-weight: 600;
}

.digest__reading-time {
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
  color: var(--faint);
}

.digest__relative {
  text-transform: none;
  letter-spacing: normal;
  font-weight: 500;
  color: var(--ink);
}

.digest__new-badge {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.6em;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.15em 0.5em;
  border-radius: 4px;
  background: var(--accent);
  color: var(--accent-ink);
  vertical-align: middle;
  text-transform: uppercase;
}

.digest__summary {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.5vw, 1.6rem);
  line-height: 1.45;
  color: var(--ink);
  margin: 0.7rem 0 0;
  text-wrap: pretty;
}

/* Audio edition player (shown only when an MP3 exists for the day) */
.digest__audio {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 1rem 0 0;
  flex-wrap: wrap;
}

.digest__audio-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}

.digest__audio audio {
  height: 2.2rem;
  max-width: 100%;
}

.digest__audio-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.digest__audio-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3rem;
  padding: 0.3rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}

.digest__audio-btn:hover,
.digest__audio-btn:focus-visible {
  background: var(--accent);
  color: var(--accent-ink);
}

.digest__audio-speed {
  font-variant-numeric: tabular-nums;
}

/* Tag filter chips */
.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag-chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
  line-height: 1.2;
  transition: border-color 0.12s ease, color 0.12s ease, background 0.12s ease;
}

.tag-chip:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.tag-chip--active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

/* Section navigation pills (latest page): sticky to the top on mobile so the
   sections stay reachable while reading. */
@media (max-width: 40rem) {
  .tag-filters--nav {
    position: sticky;
    top: 0;
    z-index: 20;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.4rem;
    margin: 0 -1.25rem 1.25rem;
    padding: 0.6rem 1.25rem;
    background: var(--scrim);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .tag-filters--nav::-webkit-scrollbar {
    display: none;
  }
  .tag-filters--nav .tag-chip {
    flex: 0 0 auto;
    white-space: nowrap;
  }
  /* Keep section headings clear of the sticky pill bar when jumped to. */
  .digest:has(.tag-filters--nav) .item {
    scroll-margin-top: 4.25rem;
  }
}

/* Compact view toggle */

/* Favorites controls */
.fav-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.fav-controls .tag-filters {
  margin-bottom: 0;
  flex: 1;
}

.fav-sort {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.fav-sort__select {
  font-family: inherit;
  font-size: 0.82rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}

.compact-toggle {
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  margin-bottom: 1rem;
  transition: border-color 0.12s ease, color 0.12s ease;
}

.compact-toggle:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.items {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.items--compact .item__body {
  display: none;
}

.items--compact .item {
  padding: 0.7rem 1.1rem;
}

.item--collapsed .item__body {
  display: none;
}

.item__chevron {
  font-size: 0.8em;
  color: var(--faint);
  padding: 0 0.3rem;
  transition: color 0.12s ease;
}

.item__title--collapsible {
  cursor: pointer;
  user-select: none;
}

.item__title--collapsible:hover .item__chevron {
  color: var(--accent);
}

.item {
  padding: 1.6rem 1.7rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  box-shadow: var(--shadow-soft), var(--card-highlight);
  scroll-margin-top: 2rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift), var(--card-highlight);
}

.item__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.7rem;
}

.item__tag--clickable {
  cursor: pointer;
  transition: background 0.12s ease;
}

.item__tag--clickable:hover {
  background: var(--accent);
  color: var(--accent-ink);
}

.item__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  line-height: 1.25;
  margin: 0 0 0.5rem;
  text-wrap: balance;
}

.item__anchor {
  text-decoration: none;
  color: var(--faint);
  font-size: 0.85em;
  opacity: 0;
  transition: opacity 0.12s ease;
}

.item:hover .item__anchor {
  opacity: 1;
}

.item__anchor:hover {
  color: var(--accent);
}

.item__copy {
  font-family: inherit;
  font-size: 0.75em;
  background: none;
  border: none;
  color: var(--faint);
  cursor: pointer;
  opacity: 0;
  padding: 0 0.2rem;
  transition: opacity 0.12s ease, color 0.12s ease;
}

.item:hover .item__copy {
  opacity: 1;
}

.item__copy:hover {
  color: var(--accent);
}

.item__fav {
  font-family: inherit;
  font-size: 0.9em;
  background: none;
  border: none;
  color: var(--faint);
  cursor: pointer;
  opacity: 0;
  padding: 0 0.2rem;
  transition: opacity 0.12s ease, color 0.12s ease;
}

.item:hover .item__fav {
  opacity: 1;
}

.item__fav--active {
  color: var(--accent);
  opacity: 1;
}

.item__fav:hover {
  color: var(--accent);
}

.item__body {
  margin: 0;
  color: var(--ink);
  overflow-wrap: break-word;
}

.item__body ul {
  margin: 0.45rem 0 0 1.1rem;
  padding: 0;
}

.item__body li + li {
  margin-top: 0.35rem;
}

.sources {
  display: inline;
  font-size: 0.92rem;
  color: var(--muted);
}

.sources a {
  color: var(--accent);
  text-decoration-color: var(--accent-soft);
}

.aside {
  display: inline;
  font-size: 0.88rem;
  font-style: italic;
  color: var(--muted);
}

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

/* Day navigation */
.daynav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
}

.daynav__link {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  background: var(--card);
  box-shadow: 0 14px 30px -22px rgba(34, 52, 46, 0.35), var(--card-highlight);
  min-width: 8rem;
  transition: border-color 120ms ease, transform 120ms ease;
}

.daynav__next {
  text-align: right;
  align-items: flex-end;
}

.daynav__link:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.daynav__dir {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 600;
  font-family: var(--font-mono);
}

.daynav__day {
  font-size: 0.95rem;
  color: var(--ink);
}

.daynav__disabled {
  color: var(--faint);
  border-style: dashed;
  background: transparent;
  display: flex;
  align-items: center;
  min-width: 8rem;
}

.daynav__disabled.daynav__next {
  justify-content: flex-end;
}

/* Archive */
.archive-search {
  display: block;
  width: 100%;
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink);
  margin-bottom: 1rem;
  transition: border-color 0.12s ease;
}

.archive-search::placeholder {
  color: var(--faint);
}

.archive-search:focus {
  outline: none;
  border-color: var(--accent);
}

.archive-stats {
  margin: 0 0 2rem;
  font-size: 0.88rem;
  color: var(--faint);
}

.archive-month {
  margin-bottom: 2.5rem;
}

.archive-month__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--ink);
}

.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-item {
  border-top: 1px solid var(--line);
}

.archive-item--unread {
  position: relative;
}

.archive-item--unread::before {
  content: "";
  position: absolute;
  left: -0.6rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.archive-item--unread .archive-link__date {
  color: var(--accent);
}

.archive-item:last-child {
  border-bottom: 1px solid var(--line);
}

.archive-link {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 1rem;
  padding: 1.1rem 0.25rem;
  text-decoration: none;
  transition: background-color 120ms ease;
}

.archive-link:hover {
  background-color: var(--card);
}

.archive-link__date {
  font-weight: 600;
  color: var(--ink);
}

.archive-link__meta {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-mono);
  color: var(--faint);
  font-size: 0.85rem;
  white-space: nowrap;
}

.archive-link__summary {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.96rem;
  text-wrap: pretty;
}

/* Buttons / notices */
.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 8px;
  text-decoration: none;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.button:hover {
  background: var(--ink);
  opacity: 0.9;
}

.notice {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-soft), var(--card-highlight);
}

.notice h2 {
  margin-top: 0;
  font-family: var(--font-display);
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 3rem;
  color: var(--faint);
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.footer a {
  color: var(--muted);
}

.footer__updated {
  margin: 0.3rem 0 0;
  font-size: 0.8rem;
  color: var(--faint);
}

.refresh-btn {
  margin-top: 0.75rem;
  font-family: inherit;
  font-size: 0.8rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  transition: border-color 0.12s ease, color 0.12s ease;
}

.refresh-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.refresh-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

/* Loading */
.loading {
  color: var(--faint);
  padding: 1rem 0;
}

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

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow-soft);
  color: var(--ink);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.12s ease;
  pointer-events: none;
  z-index: 40;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent);
}

/* Content fade-in */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.digest,
.archive-month,
.notice {
  animation: fadeInUp 0.3s ease-out both;
}

.archive-month:nth-child(2) { animation-delay: 0.05s; }
.archive-month:nth-child(3) { animation-delay: 0.1s; }
.archive-month:nth-child(4) { animation-delay: 0.15s; }
.archive-month:nth-child(5) { animation-delay: 0.2s; }

/* Keyboard shortcut help dialog */
.kbd-help {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  color: var(--ink);
  padding: 1.5rem 2rem;
  max-width: 22rem;
  box-shadow: var(--shadow-lift);
}

.kbd-help::backdrop {
  background: rgba(0, 0, 0, 0.3);
}

.kbd-help h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.kbd-help__list {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.kbd-help__list div {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.kbd-help__list dt {
  margin: 0;
}

.kbd-help__list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.kbd-help__list kbd {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.85rem;
  min-width: 1.8rem;
  text-align: center;
}

.kbd-help__close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--faint);
  cursor: pointer;
}

.kbd-help__close:hover {
  color: var(--ink);
}

@media (max-width: 32rem) {
  .daynav {
    flex-direction: column;
  }
  .daynav__next,
  .daynav__disabled.daynav__next {
    text-align: left;
    align-items: flex-start;
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  body {
    background: white;
    color: black;
    font-size: 11pt;
    line-height: 1.5;
  }

  .masthead,
  .footer,
  .daynav,
  .skip-link,
  .back-to-top,
  .reading-progress,
  .loading {
    display: none;
  }

  .wrap {
    width: 100%;
    max-width: none;
  }

  .item {
    break-inside: avoid;
    border-top-color: #ccc;
  }

  .item__tag {
    background: none;
    border: 1px solid #ccc;
    color: #333;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #555;
    word-break: break-all;
  }

  .masthead__brand a::after,
  .nav a::after {
    content: none;
  }
}