:root,
html[data-theme="light"] {
  color-scheme: light;
  --sidebar: #f6f7f8; /* Things --color-base-10 */
  --bg-base: #ffffff; /* --color-base-00 */
  --sky-top: #ffffff;
  --sky-bottom: #ffffff;
  --sky-mix-light: 0%;
  --sky-mix-dark: 0%;
  --sky-mix: var(--sky-mix-light);
  --sky-glow-mask-start: 50%;
  --sky-glow-opacity: 0.85;
  --stars-opacity: 0;
  --text: #222222; /* --color-base-100 */
  --text-muted: hsl(212, 10%, 37%); /* Things light --text-muted */
  --frame-border: #ebedf0; /* sidebar ↔ main seam */
  --table-hover: #ebedf0;
  --pad-y: 1.5rem;
  --pad-x: 1rem;
  --pad-scale: 3;
  --gutter: 13.44rem; /* 8rem × 1.4 × 1.2 */
}

/* Things dark — sampled from app: sidebar / main */
html[data-theme="dark"] {
  color-scheme: dark;
  --sidebar: rgb(41, 42, 45);
  --bg-base: rgb(45, 46, 49);
  --sky-mix: var(--sky-mix-dark);
  --text: #dadada; /* --color-base-100 */
  --text-muted: hsl(212, 15%, 78%); /* Things dark muted */
  --frame-border: rgb(30, 31, 33);
  --table-hover: rgb(55, 56, 58);
}

/* No-JS fallback — theme follows OS until inline bootstrap sets data-theme */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --sidebar: rgb(41, 42, 45);
    --bg-base: rgb(45, 46, 49);
    --sky-mix: var(--sky-mix-dark);
    --text: #dadada;
    --text-muted: hsl(212, 15%, 78%);
    --frame-border: rgb(30, 31, 33);
    --table-hover: rgb(55, 56, 58);
  }
}

h1, h2, h3, h4, h5, h6,
small, big {
  font-size: 1em;
  font-weight: normal;
}

h1.post-title {
  font-weight: bold;
}

html {
  scrollbar-gutter: stable;
  min-height: 100%;
  box-sizing: border-box;
  /* Sidebar borders use --sidebar; content flanks use --bg-base (sky is .sky-glow) */
  background: var(--bg-base);
}

/*
  mobile:  {content}
  tablet:  {gray}|{bg}{content}{bg}
  desktop: {gray}|{bg}{content}{bg}|{gray}
  wider:   gray stays at viewport edges; bg grows; content stays 640 centered
*/
body {
  box-sizing: border-box;
  max-width: 640px;
  min-height: 100vh;
  margin: 0 auto;
  padding: calc(var(--pad-y) * var(--pad-scale)) var(--pad-x);
  /* SF / Segoe UI / system UI sans */
  font-family: system-ui, sans-serif;
  font-size: 1em;
  line-height: 1.4;
  color: var(--text);
  background: transparent;
}

/* Forced Light/Dark — opaque content column; sky stays decorative */
html[data-theme-locked="true"] {
  --sky-mix: 0%;
}

html[data-theme-locked="true"] body {
  background: var(--bg-base);
}

/* Mobile — keep body transparent so fixed sky stays visible with dilated opacity */
@media (max-width: 47.99rem) {
  html[data-theme-locked="true"] body {
    background: transparent;
  }
}

html[data-theme-locked="true"] .sky-glow {
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, #000 70%, #000 100%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, #000 70%, #000 100%);
}

/* tablet — gray on left edge only; restore wider content padding */
@media (min-width: 48rem) {
  html {
    border-left: var(--gutter) solid var(--sidebar);
    box-shadow: inset 1px 0 0 var(--frame-border);
  }

  body {
    padding-left: calc(var(--pad-x) * var(--pad-scale));
    padding-right: calc(var(--pad-x) * var(--pad-scale));
  }
}

/* desktop+ — gray on both viewport edges; bg fills toward centered content */
@media (min-width: 56rem) {
  html {
    border-right: var(--gutter) solid var(--sidebar);
    box-shadow:
      inset 1px 0 0 var(--frame-border),
      inset -1px 0 0 var(--frame-border);
  }
}

a {
  color: var(--text-muted);
}

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

/* ISO dates in archive */
.archive-grid time {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
}

.post-date {
  margin-bottom: 1.5rem;
  color: var(--text-muted);
}

aside.referenced,
aside.related {
  margin-top: 1.5rem;
}

.archive-grid {
  width: 100%;
  max-width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  border: 1px solid var(--frame-border);
}

.archive-grid td {
  width: 50%;
  padding: 0.75rem;
  vertical-align: top;
  border: 1px solid var(--frame-border);
  overflow: hidden;
}

.archive-grid img,
.archive-grid video {
  max-width: 100%;
  height: auto;
  display: block;
}

.archive-grid td:hover {
  background: var(--table-hover);
}

/* View transitions — sky excluded from snapshots (Safari VT + persist) */
#sky-decor {
  view-transition-name: none;
  --stars-opacity: 0;
}

/* Root swap is instant — animating root caused flat-bg flash (body transparent, sky excluded). */
::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
}

html[data-vt-off="true"] ::view-transition-old(root),
html[data-vt-off="true"] ::view-transition-new(root),
html[data-vt-off="true"] ::view-transition-old(main),
html[data-vt-off="true"] ::view-transition-new(main) {
  animation-duration: 0s;
}

/* Client nav — crossfade main only so sky persist stays visible underneath. */
main {
  view-transition-name: main;
}

@keyframes main-vt-out {
  to {
    opacity: 0;
    transform: translateY(-4px);
  }
}

@keyframes main-vt-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

::view-transition-old(main) {
  animation: main-vt-out 0.22s ease-out both;
}

::view-transition-new(main) {
  animation: main-vt-in 0.28s ease-out both;
}

/* Info / resume: Pandoc definition list → year | details */
dl.year-entry {
  display: grid;
  grid-template-columns: 4em 1fr;
  column-gap: 1rem;
  align-items: baseline;
}

dl.year-entry > dt {
  grid-column: 1;
  color: var(--text-muted);
  font-weight: normal;
}

dl.year-entry > dd {
  grid-column: 2;
  margin: 0;
}

/* Main focus-in — first load only (no blur — costly on Safari) */
@keyframes focus-in {
  from {
    opacity: 0.82;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body > main > *:not(br) {
  animation: focus-in 0.4s ease-out both;
}

/* Client navigations — skip blur/fade so only view transitions (or instant swap) show */
html.nav-ready body > main > *:not(br) {
  animation: none;
}

@media (prefers-reduced-motion: reduce) {
  body > main > *:not(br) {
    animation: none;
  }

  ::view-transition-old(main),
  ::view-transition-new(main) {
    animation: none;
  }
}

/* Decorative sky — hidden in HTML until JS confirms CSS loaded (see BaseLayout) */
#sky-decor[hidden] {
  display: none;
}

/* Hybrid atmosphere sky — full viewport, fades toward top */
.sky-glow {
  position: fixed;
  inset: 0;
  height: 100vh;
  height: 100dvh;
  pointer-events: none;
  z-index: 0;
  opacity: var(--sky-glow-opacity, 0.85);
  transform: translateZ(0);
  transform-origin: bottom;
  /* Static fallback — JS sets inline mask/opacity for Safari iOS */
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, #000 50%, #000 100%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, #000 50%, #000 100%);
}

.sky-glow-inner,
.sky-glow-inner svg {
  height: 100%;
  width: 100%;
}

/* Twinkling stars — upper sky, night only via --stars-opacity */
.sky-stars {
  position: fixed;
  inset: 0;
  height: 100vh;
  height: 100dvh;
  pointer-events: none;
  z-index: 0;
  opacity: var(--stars-opacity, 0);
  transform: translateZ(0);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 55%, rgba(0, 0, 0, 0) 85%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 55%, rgba(0, 0, 0, 0) 85%);
}

.sky-stars-inner,
.sky-stars-inner svg {
  height: 100%;
  width: 100%;
}

.sky-stars svg {
  shape-rendering: crispEdges;
}

.sky-stars .star {
  fill: #fff;
  opacity: 0.35;
  animation: star-twinkle ease-in-out infinite alternate;
}

@keyframes star-twinkle {
  from {
    opacity: 0.55;
  }
  to {
    opacity: 1;
  }
}

html.sky-rise .sky-glow {
  animation: sky-rise 1100ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes sky-rise {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  html.sky-rise .sky-glow {
    animation: none;
    transform: scaleY(1);
  }

  .sky-stars .star {
    animation: none;
    opacity: 0.65;
  }
}

body > header,
body > main,
body > footer,
body > .sky-clock {
  position: relative;
  z-index: 1;
}

.sky-clock button {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  user-select: none;
  -webkit-user-select: none;
}