/* ============================================================================
   Prism · app layout — chrome, pages, scenes, transitions
   ========================================================================== */

/* ------------------------------- app chrome --------------------------------- */

.appbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 120;
  height: var(--appbar-h);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 var(--gutter);
  transition: background-color var(--dur-medium) var(--ease-standard),
              box-shadow var(--dur-medium) var(--ease-standard);
}
.appbar--scrolled {
  background: color-mix(in oklch, var(--md-surface-container) 82%, transparent);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: 0 1px 0 var(--md-outline-variant);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--md-on-surface);
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 1.7rem; height: 1.7rem;
  border-radius: var(--shape-squircle);
  background: conic-gradient(from 210deg, var(--glow-a), var(--glow-b), var(--glow-c), var(--glow-a));
  box-shadow: 0 0 14px color-mix(in oklch, var(--glow-a) 55%, transparent);
  animation: brand-spin 14s linear infinite;
}
@keyframes brand-spin {
  0%   { border-radius: var(--shape-squircle); rotate: 0deg; }
  50%  { border-radius: 50% 42% 55% 45% / 42% 58% 45% 55%; }
  100% { border-radius: var(--shape-squircle); rotate: 360deg; }
}

.appbar__nav {
  display: flex;
  gap: 0.25rem;
  margin-inline: auto;
}
.navlink {
  position: relative;
  padding: 0.5rem 1.05rem;
  border-radius: var(--shape-full);
  color: var(--md-on-surface-variant);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--type-label-lg);
  transition: color var(--dur-short) var(--ease-standard), background-color var(--dur-short) var(--ease-standard);
}
.navlink:hover { text-decoration: none; background: color-mix(in oklch, var(--md-on-surface) 6%, transparent); }
.navlink[aria-current="page"] {
  color: var(--md-on-secondary-container);
  background: var(--md-secondary-container);
}

.appbar__actions { display: flex; gap: 0.15rem; align-items: center; }

/* command-palette hint chip */
.kbd-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-right: 0.35rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--shape-full);
  background: color-mix(in oklch, var(--md-surface-container-low) 70%, transparent);
  color: var(--md-on-surface-variant);
  font-size: var(--type-label-md);
  cursor: pointer;
  transition: border-color var(--dur-short), background-color var(--dur-short);
}
.kbd-hint:hover { border-color: var(--md-outline); background: var(--md-surface-container); }
.kbd-hint kbd {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.1rem 0.35rem;
  border-radius: 0.3rem;
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-bottom-width: 2px;
}

/* reading progress */
.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 130;
  background: linear-gradient(90deg, var(--glow-a), var(--glow-b));
  transform-origin: 0 0;
  transform: scaleX(0);
  opacity: 0;
  transition: opacity var(--dur-medium) var(--ease-standard);
}
.progress--on { opacity: 1; }

/* mobile bottom navigation */
.bottomnav {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 120;
  display: none;
  padding-bottom: env(safe-area-inset-bottom);
  background: color-mix(in oklch, var(--md-surface-container) 92%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid var(--md-outline-variant);
}
.bottomnav a {
  flex: 1;
  display: grid;
  justify-items: center;
  gap: 0.2rem;
  padding: 0.65rem 0 0.6rem;
  color: var(--md-on-surface-variant);
  font-size: var(--type-label-md);
  font-weight: 600;
  font-family: var(--font-display);
}
.bottomnav a:hover { text-decoration: none; }
.bottomnav .icon { width: 1.45rem; height: 1.45rem; }
.bottomnav a span:last-child { line-height: 1; }
.bottomnav a .pill {
  display: grid;
  place-items: center;
  width: 3.4rem; height: 1.85rem;
  border-radius: var(--shape-full);
  transition: background-color var(--dur-medium) var(--ease-emphasized);
}
.bottomnav a[aria-current="page"] { color: var(--md-on-surface); }
.bottomnav a[aria-current="page"] .pill { background: var(--md-secondary-container); }
.bottomnav a[aria-current="page"] .icon { color: var(--md-on-secondary-container); }

main {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  padding-top: var(--appbar-h);
}

.footer {
  position: relative;
  z-index: 1;
  margin-top: 5rem;
  padding: 3rem var(--gutter) 3.5rem;
  border-top: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container-low);
}
.footer__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: space-between;
  color: var(--md-on-surface-variant);
  font-size: var(--type-body-sm);
}
.footer a { color: inherit; font-weight: 600; }
.footer a:hover { color: var(--md-primary); }

/* ------------------------------- gl canvases --------------------------------- */

.gl-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.gl-stage canvas { width: 100%; height: 100%; }

/* CSS fallback sky (shown until/unless WebGL paints) */
.gl-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 44% at 22% 12%, color-mix(in oklch, var(--glow-a) 26%, transparent), transparent 70%),
    radial-gradient(50% 40% at 82% 6%, color-mix(in oklch, var(--glow-b) 20%, transparent), transparent 72%),
    radial-gradient(40% 34% at 55% 28%, color-mix(in oklch, var(--glow-c) 13%, transparent), transparent 75%);
  transition: opacity var(--dur-xlong) var(--ease-standard);
}
.gl-stage--live::before { opacity: 0; }

/* --------------------------------- sections --------------------------------- */

.section {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2.5rem var(--gutter);
}
.section__title {
  font-size: var(--type-headline-md);
  margin-bottom: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.section__title::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, var(--md-outline-variant), transparent);
}
.section__more { margin-top: 2rem; text-align: center; }
.page-title {
  font-size: var(--type-display-md);
  font-weight: 700;
  margin-bottom: 1.8rem;
}

/* ----------------------------------- hero ------------------------------------ */

.hero {
  position: relative;
  min-height: calc(88dvh - var(--appbar-h));
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem var(--gutter) 4rem;
}
.hero__inner { max-width: 60rem; }

/* ---- the veil: surface-colored overlay with the wordmark knocked out ---- */

.hero--veil { --word-size: clamp(4.5rem, 18vw, 15rem); }

.hero__veil {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(-1 * var(--appbar-h));
  width: 100%;
  height: calc(100% + var(--appbar-h));
  pointer-events: none;
  z-index: 0;
  /* entrance: the veil condenses over open sky, letters emerge from light */
  animation: veil-in 1200ms var(--ease-standard) backwards;
}
@keyframes veil-in { from { opacity: 0; } }
.hero__veil-rect {
  fill: var(--md-surface);
  transition: fill var(--dur-medium) var(--ease-standard);
}
.hero__word {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--word-size);
  letter-spacing: -0.045em;
}
.hero__drift {
  transition: transform 700ms var(--ease-emphasized-decel);
  will-change: transform;
}

.hero--veil .hero__inner { position: relative; z-index: 1; }

/* slot in the content column where the mask letters land */
.hero__wordspace {
  height: calc(var(--word-size) * 1.06);
  margin: 0.4rem 0 1rem;
}

.hero__greet {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 1.1rem 0.4rem 0.45rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--shape-full);
  background: color-mix(in oklch, var(--md-surface-container-low) 75%, transparent);
  color: var(--md-on-surface-variant);
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--type-label-lg);
  animation: hero-rise var(--dur-xlong) var(--ease-emphasized-decel) backwards;
}
.hero__greet-ava {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: var(--shape-squircle);
  overflow: clip;
  box-shadow: 0 0 0 2px color-mix(in oklch, var(--glow-a) 55%, transparent);
}
.hero__greet-ava__img { width: 100%; height: 100%; object-fit: cover; }
.hero__greet-ava__mono {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 800;
  color: oklch(0.99 0.01 var(--seed-hue, 265));
  background: linear-gradient(135deg, var(--glow-a), var(--glow-b));
}
.hero__intro {
  max-width: 37rem;
  margin: 0 auto;
  font-size: var(--type-headline-sm);
  font-weight: 400;
  line-height: 1.55;
  color: var(--md-on-surface-variant);
  text-wrap: pretty;
  animation: hero-rise var(--dur-xlong) var(--ease-emphasized-decel) 160ms backwards;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  justify-content: center;
  margin-top: 2.2rem;
  animation: hero-rise var(--dur-xlong) var(--ease-emphasized-decel) 240ms backwards;
}

/* "Latest" pill — a quiet, concrete alternative to a second big button */
.hero__latest {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  max-width: min(88vw, 26rem);
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--shape-full);
  background: color-mix(in oklch, var(--md-surface-container-low) 65%, transparent);
  color: var(--md-on-surface-variant);
  font-size: var(--type-body-sm);
  transition: border-color var(--dur-short) var(--ease-standard),
              color var(--dur-short) var(--ease-standard),
              transform var(--dur-medium) var(--ease-emphasized);
}
.hero__latest:hover {
  text-decoration: none;
  border-color: color-mix(in oklch, var(--glow-a) 55%, var(--md-outline-variant));
  color: var(--md-on-surface);
  transform: translateY(-2px);
}
.hero__latest-dot {
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--glow-a);
  box-shadow: 0 0 8px var(--glow-a);
  animation: latest-pulse 2.4s var(--ease-standard) infinite;
}
@keyframes latest-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hero__latest-label {
  font-weight: 700;
  font-family: var(--font-display);
  font-size: var(--type-label-md);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-primary);
}
.hero__latest-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 550;
}
@keyframes hero-rise {
  from { opacity: 0; transform: translateY(1.6rem); }
}
.hero__scroll {
  position: absolute;
  bottom: 1.8rem;
  left: 50%;
  translate: -50%;
  color: var(--md-on-surface-variant);
  opacity: 0.7;
  animation: bob 2.6s var(--ease-standard) infinite;
}
.hero__scroll .icon { rotate: 90deg; }
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* stats strip */
.statstrip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: clamp(1.5rem, 5vw, 4.5rem);
  padding: 0 var(--gutter) 1rem;
}
.stat { text-align: center; }
.stat__num {
  font-family: var(--font-display);
  font-size: var(--type-headline-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--md-primary);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-size: var(--type-label-md);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
}

/* -------------------------------- post cards --------------------------------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr));
  gap: 1.4rem;
}

.post-card {
  border-radius: var(--shape-xl);
  background: var(--md-surface-container-low);
  box-shadow: var(--elev-1);
  overflow: clip;
  transition: box-shadow var(--dur-medium) var(--ease-standard),
              transform var(--dur-medium) var(--ease-emphasized),
              background-color var(--dur-medium);
}
.post-card:hover {
  box-shadow: var(--elev-4);
  transform: translateY(-5px);
  background: var(--md-surface-container);
}
/* the link fills the card, and the card clips, so the link's own focus ring
   would be invisible — draw it on the card instead */
.post-card:focus-within {
  outline: 2.5px solid var(--md-primary);
  outline-offset: 2px;
}
.post-card__link:focus-visible { outline: none; }
.post-card:active { transform: translateY(-2px) scale(0.99); }
.post-card__link { display: block; color: inherit; height: 100%; }
.post-card__link:hover { text-decoration: none; }

.post-card__cover {
  height: 9.5rem;
  background:
    var(--grain),
    radial-gradient(120% 160% at 15% 0%, oklch(0.80 0.11 var(--card-hue)) 0%, transparent 55%),
    radial-gradient(110% 130% at 90% 15%, oklch(0.70 0.13 calc(var(--card-hue) + 70)) 0%, transparent 55%),
    radial-gradient(150% 130% at 60% 110%, oklch(0.55 0.14 calc(var(--card-hue) - 40)) 0%, transparent 60%),
    linear-gradient(160deg, oklch(0.65 0.12 var(--card-hue)), oklch(0.45 0.13 calc(var(--card-hue) + 40)));
  background-blend-mode: overlay, normal, normal, normal, normal;
  transition: scale var(--dur-xlong) var(--ease-emphasized);
}
.post-card:hover .post-card__cover { scale: 1.05; }
:root[data-theme="dark"] .post-card__cover { filter: saturate(0.9) brightness(0.85); }

.post-card--featured { grid-column: 1 / -1; }
.post-card--featured .post-card__link {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  min-height: 17rem;
}
.post-card--featured .post-card__cover { height: 100%; }
.post-card--featured .post-card__title { font-size: var(--type-headline-lg); }

.post-card__body { padding: 1.3rem 1.4rem 1.5rem; display: grid; gap: 0.55rem; align-content: start; }
.post-card__meta {
  font-size: var(--type-label-md);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--md-primary);
}
.post-card__title {
  font-size: var(--type-title-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.post-card__desc {
  font-size: var(--type-body-md);
  color: var(--md-on-surface-variant);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.3rem; }

/* tag filter row */
.tagrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.8rem;
}

/* pagination */
.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2.6rem;
  font-variant-numeric: tabular-nums;
}
.pager__info { color: var(--md-on-surface-variant); font-size: var(--type-body-sm); }

/* --------------------------------- post page --------------------------------- */

.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 15rem;
  gap: 3.5rem;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 3rem;
}

.post { min-width: 0; max-width: var(--prose-width); margin: 0 auto; width: 100%; }

.post__hero {
  height: clamp(11rem, 26vw, 16rem);
  border-radius: var(--shape-xl);
  margin-bottom: 2rem;
  background:
    var(--grain),
    radial-gradient(120% 160% at 15% 0%, oklch(0.80 0.11 var(--card-hue)) 0%, transparent 55%),
    radial-gradient(110% 130% at 90% 15%, oklch(0.70 0.13 calc(var(--card-hue) + 70)) 0%, transparent 55%),
    radial-gradient(150% 130% at 60% 110%, oklch(0.55 0.14 calc(var(--card-hue) - 40)) 0%, transparent 60%),
    linear-gradient(160deg, oklch(0.65 0.12 var(--card-hue)), oklch(0.45 0.13 calc(var(--card-hue) + 40)));
  background-blend-mode: overlay, normal, normal, normal, normal;
  view-transition-name: post-cover;
}
:root[data-theme="dark"] .post__hero { filter: saturate(0.9) brightness(0.85); }

.post__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  font-size: var(--type-label-lg);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--md-primary);
}
.post__title {
  margin: 0.8rem 0 0.9rem;
  font-size: var(--type-display-md);
  font-weight: 800;
  letter-spacing: -0.025em;
}
.post__desc {
  font-size: var(--type-headline-sm);
  font-weight: 400;
  line-height: 1.45;
  color: var(--md-on-surface-variant);
}
.post__header { margin-bottom: 2.4rem; }
.post__header .post-card__tags { margin-top: 1.1rem; }

/* toc rail */
.toc {
  position: sticky;
  top: calc(var(--appbar-h) + 2rem);
  align-self: start;
  max-height: calc(100dvh - var(--appbar-h) - 4rem);
  overflow-y: auto;
  font-size: var(--type-body-sm);
  padding-left: 0.25rem;
}
.toc__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--type-label-md);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
  margin-bottom: 0.9rem;
}
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--md-outline-variant); }
.toc a {
  display: block;
  padding: 0.34rem 0 0.34rem 1rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--md-on-surface-variant);
  transition: color var(--dur-short), border-color var(--dur-short);
}
.toc a:hover { color: var(--md-on-surface); text-decoration: none; }
.toc li[data-level="3"] a { padding-left: 2rem; }
.toc a[aria-current="true"] {
  color: var(--md-primary);
  border-left-color: var(--md-primary);
  font-weight: 650;
}

/* reactions */
.reactions {
  display: flex;
  gap: 0.7rem;
  margin: 3rem 0 0;
  padding-top: 2rem;
  border-top: 1px solid var(--md-outline-variant);
}
.react {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--shape-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  font-size: var(--type-label-lg);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
  transition: all var(--dur-short) var(--ease-standard);
}
.react:hover { border-color: var(--md-primary); color: var(--md-primary); transform: translateY(-2px); }
.react .icon { width: 1.15rem; height: 1.15rem; }
.react--on {
  background: var(--md-primary-container);
  border-color: transparent;
  color: var(--md-on-primary-container);
}
.react--pop .icon { animation: react-pop 500ms var(--ease-spring); }
@keyframes react-pop {
  30% { transform: scale(1.45) rotate(-8deg); }
}

/* prev / next */
.adjacent {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.4rem;
}
.adjacent a {
  display: grid;
  gap: 0.3rem;
  padding: 1.1rem 1.3rem;
  border-radius: var(--shape-lg);
  border: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface);
  transition: border-color var(--dur-short), background-color var(--dur-short), transform var(--dur-medium) var(--ease-emphasized);
}
.adjacent a:hover {
  text-decoration: none;
  border-color: var(--md-primary);
  background: color-mix(in oklch, var(--md-primary) 5%, transparent);
  transform: translateY(-3px);
}
.adjacent a.next { text-align: right; }
.adjacent__dir { font-size: var(--type-label-md); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--md-primary); }
.adjacent__title { font-family: var(--font-display); font-weight: 650; font-size: var(--type-body-md); }

/* comments */
.comments { margin-top: 3.2rem; }
.comments__title { font-size: var(--type-headline-sm); margin-bottom: 1.4rem; }
.comment {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0.9rem;
  padding: 1rem 0;
}
.comment + .comment { border-top: 1px solid var(--md-outline-variant); }
.comment__avatar {
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--shape-squircle);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  color: oklch(0.99 0.01 var(--av-hue, 265));
  background: linear-gradient(135deg, oklch(0.62 0.13 var(--av-hue, 265)), oklch(0.5 0.14 calc(var(--av-hue, 265) + 50)));
}
.comment__head { display: flex; gap: 0.7rem; align-items: baseline; }
.comment__author { font-weight: 700; font-family: var(--font-display); font-size: var(--type-body-md); }
.comment__date { font-size: var(--type-label-md); color: var(--md-on-surface-variant); }
.comment__body { font-size: var(--type-body-md); margin-top: 0.2rem; white-space: pre-wrap; overflow-wrap: anywhere; }

.comment-form {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.6rem;
  padding: 1.4rem;
  border-radius: var(--shape-xl);
  background: var(--md-surface-container-low);
}
.comment-form__row { display: flex; gap: 0.9rem; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.comment-form__row .field { flex: 1; min-width: 12rem; }

/* --------------------------------- about page -------------------------------- */

.about-head {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.8rem;
}
.about-head .page-title { margin-bottom: 0; }
.about-ava {
  flex: none;
  width: 4rem;
  height: 4rem;
  border-radius: var(--shape-squircle);
  overflow: clip;
  box-shadow:
    0 0 0 2px var(--md-surface),
    0 0 0 4px color-mix(in oklch, var(--glow-a) 55%, transparent);
}
.about-ava__img { width: 100%; height: 100%; object-fit: cover; }
.about-ava__mono {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  color: oklch(0.99 0.01 var(--seed-hue, 265));
  background: linear-gradient(135deg, var(--glow-a), var(--glow-b));
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}
.about-card {
  padding: 1.8rem;
  border-radius: var(--shape-xl);
  background: var(--md-surface-container-low);
  display: grid;
  gap: 0.4rem;
}
.about-card h3 { font-size: var(--type-title-lg); margin-bottom: 0.5rem; }
.about-card ul { margin: 0; padding-left: 1.2rem; color: var(--md-on-surface-variant); font-size: var(--type-body-md); }
.about-card li + li { margin-top: 0.4rem; }
#constellation {
  width: 100%;
  aspect-ratio: 1;
  max-height: 26rem;
  border-radius: var(--shape-xl);
  overflow: clip;
}

/* --------------------------------- 404 --------------------------------------- */

.missing { text-align: center; padding-top: 16dvh; }
.missing .page-title { font-size: clamp(5rem, 18vw, 10rem); background: linear-gradient(120deg, var(--glow-text-a), var(--glow-text-b)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ----------------------------- command palette ------------------------------- */

dialog.palette {
  margin: 12dvh auto auto;
  width: min(92vw, 37rem);
  padding: 0;
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--shape-xl);
  background: color-mix(in oklch, var(--md-surface-container-high) 92%, transparent);
  backdrop-filter: blur(24px) saturate(1.3);
  -webkit-backdrop-filter: blur(24px) saturate(1.3);
  color: var(--md-on-surface);
  box-shadow: var(--elev-5);
}
dialog.palette::backdrop { background: color-mix(in oklch, var(--md-scrim) 32%, transparent); }
dialog.palette[open] { animation: palette-in var(--dur-medium) var(--ease-emphasized-decel); }
@keyframes palette-in {
  from { opacity: 0; transform: translateY(-1.2rem) scale(0.97); }
}
.palette__search {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.05rem 1.3rem;
  border-bottom: 1px solid var(--md-outline-variant);
}
.palette__search .icon { width: 1.3rem; height: 1.3rem; color: var(--md-on-surface-variant); flex: none; }
.palette__search input {
  flex: 1;
  border: none;
  background: none;
  font-size: var(--type-body-lg);
  color: var(--md-on-surface);
}
.palette__search input:focus { outline: none; }
.palette__list {
  max-height: min(52dvh, 24rem);
  overflow-y: auto;
  padding: 0.5rem;
  overscroll-behavior: contain;
}
.palette__group {
  padding: 0.7rem 0.9rem 0.3rem;
  font-size: var(--type-label-md);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--md-on-surface-variant);
}
.palette__item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.7rem 0.9rem;
  border: none;
  border-radius: var(--shape-md);
  background: none;
  color: var(--md-on-surface);
  font-size: var(--type-body-md);
  text-align: left;
  cursor: pointer;
}
.palette__item .icon { width: 1.2rem; height: 1.2rem; color: var(--md-on-surface-variant); flex: none; }
.palette__item[aria-selected="true"] {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}
.palette__item[aria-selected="true"] .icon { color: inherit; }
.palette__item small { color: var(--md-on-surface-variant); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette__empty { padding: 2rem; text-align: center; color: var(--md-on-surface-variant); }

/* ------------------------------- theme sheet --------------------------------- */

.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(2.6rem, 1fr)); gap: 0.6rem; }
.swatch {
  aspect-ratio: 1;
  border: 3px solid transparent;
  border-radius: var(--shape-squircle);
  background: oklch(0.62 0.16 var(--sw));
  cursor: pointer;
  transition: transform var(--dur-medium) var(--ease-spring), border-color var(--dur-short), border-radius var(--dur-medium) var(--ease-emphasized);
}
.swatch:hover { transform: scale(1.12) rotate(-4deg); border-radius: 50%; }
.swatch--on { border-color: var(--md-on-surface); }
.hue-row { display: flex; align-items: center; gap: 1rem; }
.hue-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 1rem;
  border-radius: var(--shape-full);
  background: linear-gradient(90deg,
    oklch(0.65 0.15 0), oklch(0.65 0.15 60), oklch(0.65 0.15 120), oklch(0.65 0.15 180),
    oklch(0.65 0.15 240), oklch(0.65 0.15 300), oklch(0.65 0.15 360));
  cursor: pointer;
}
.hue-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 1.7rem; height: 1.7rem;
  border-radius: 50%;
  border: 4px solid var(--md-surface);
  background: oklch(0.62 0.16 var(--seed-hue, 265));
  box-shadow: var(--elev-2);
}
.hue-slider::-moz-range-thumb {
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  border: 4px solid var(--md-surface);
  background: oklch(0.62 0.16 var(--seed-hue, 265));
  box-shadow: var(--elev-2);
}
.theme-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.theme-row__label { font-weight: 600; font-family: var(--font-display); font-size: var(--type-body-md); }

/* ------------------------------- admin studio -------------------------------- */

.studio { max-width: var(--content-width); margin: 0 auto; padding: 2rem var(--gutter); }
.studio__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.8rem;
}
.studio__bar .page-title { margin: 0; flex: 1; font-size: var(--type-headline-lg); }
.studio__tabs { display: flex; gap: 0.3rem; margin-bottom: 1.6rem; border-bottom: 1px solid var(--md-outline-variant); }
.studio__tab {
  position: relative;
  padding: 0.8rem 1.3rem;
  border: none;
  background: none;
  color: var(--md-on-surface-variant);
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--type-label-lg);
  cursor: pointer;
}
.studio__tab[aria-selected="true"] { color: var(--md-primary); }
.studio__tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0.9rem; right: 0.9rem; bottom: -1px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--md-primary);
}

.studio-list { display: grid; gap: 0.7rem; }
.studio-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  border-radius: var(--shape-lg);
  background: var(--md-surface-container-low);
  transition: background-color var(--dur-short);
}
.studio-row:hover { background: var(--md-surface-container); }
.studio-row__dot { width: 0.9rem; height: 0.9rem; border-radius: 50%; background: oklch(0.62 0.15 var(--card-hue, 265)); flex: none; }
.studio-row__main { flex: 1; min-width: 0; }
.studio-row__title { font-weight: 650; font-family: var(--font-display); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.studio-row__sub { font-size: var(--type-label-md); color: var(--md-on-surface-variant); }
.studio-row__badge {
  padding: 0.2rem 0.7rem;
  border-radius: var(--shape-full);
  font-size: var(--type-label-md);
  font-weight: 700;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}
.studio-row__badge--draft { background: var(--md-surface-container-highest); color: var(--md-on-surface-variant); }

/* editor */
.editor { display: grid; gap: 1.1rem; }
.editor__grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1.1rem; }
.editor__meta { display: grid; gap: 1.1rem; align-content: start; }
.editor__split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; align-items: stretch; }
.editor__split--solo { grid-template-columns: 1fr; }
.editor textarea.editor__md {
  min-height: 30rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  white-space: pre-wrap;
}
.editor__preview {
  min-height: 30rem;
  max-height: 44rem;
  overflow-y: auto;
  padding: 1.4rem 1.6rem;
  border-radius: var(--shape-lg);
  border: 1.5px solid var(--md-outline-variant);
  background: var(--md-surface);
}
.editor__actions { display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap; }
.editor__actions .spacer { flex: 1; }
.login-card {
  max-width: 24rem;
  margin: 10dvh auto 0;
  padding: 2.2rem;
  display: grid;
  gap: 1.2rem;
  border-radius: var(--shape-xl);
  background: var(--md-surface-container-low);
  box-shadow: var(--elev-2);
}

/* ------------------------------ reveal on scroll ------------------------------ */

.reveal { opacity: 0; transform: translateY(1.8rem); }
.reveal--in {
  opacity: 1;
  transform: none;
  transition: opacity var(--dur-xlong) var(--ease-standard) var(--reveal-delay, 0ms),
              transform var(--dur-xlong) var(--ease-emphasized) var(--reveal-delay, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ----------------------------- view transitions ------------------------------ */

@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root) {
    animation: vt-out 220ms var(--ease-emphasized-accel) forwards;
  }
  ::view-transition-new(root) {
    animation: vt-in 420ms var(--ease-emphasized-decel) 60ms backwards;
  }
  @keyframes vt-out {
    to { opacity: 0; transform: translateY(-0.8rem) scale(0.995); }
  }
  @keyframes vt-in {
    from { opacity: 0; transform: translateY(1.2rem) scale(0.995); }
  }
  ::view-transition-group(post-cover) {
    animation-duration: 450ms;
    animation-timing-function: var(--ease-emphasized);
  }
}

/* -------------------------------- responsive ---------------------------------- */

@media (max-width: 60rem) {
  .post-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
  .about-layout { grid-template-columns: 1fr; }
  .editor__grid { grid-template-columns: 1fr; }
  .editor__split { grid-template-columns: 1fr; }
  .post-card--featured .post-card__link { grid-template-columns: 1fr; }
  .post-card--featured .post-card__cover { height: 11rem; }
}

@media (max-width: 46rem) {
  .appbar__nav { display: none; }
  .kbd-hint span { display: none; }
  .bottomnav { display: flex; }
  main { padding-bottom: 5.5rem; }
  .footer { margin-bottom: 3.6rem; }
  .adjacent { grid-template-columns: 1fr; }
  .adjacent a.next { text-align: left; }
  .hero { min-height: calc(78dvh - var(--appbar-h)); }
}