/* ─── View Transitions ─────────────────────────────── */
@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}

/* ─── Reset & Base ──────────────────────────────────── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ─── Design Tokens ─────────────────────────────────── */
:root {
  --bg: #f5f5f7;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --separator: rgba(0, 0, 0, 0.08);
  --glass-border: rgba(255, 255, 255, 0.65);
  --accent: #d4b95e;
  --accent-muted: rgba(212, 185, 94, 0.15);
  --max-width: 600px;
  --nav-top: 16px;
  --radius-pill: 999px;
  --radius-card: 12px;
  --transition-base: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: hsl(219, 30%, 12%);
  --text: #f5f5f7;
  --text-secondary: #98989d;
  --separator: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.15);
}

/* ─── Typography ────────────────────────────────────── */
html {
  font-family:
    "LXGW WenKai Lite",
    -apple-system,
    BlinkMacSystemFont,
    "SF Pro Text",
    "Helvetica Neue",
    sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg);
  color: var(--text);
  transition:
    background-color 0.6s ease,
    color 0.6s ease;
}

body {
  min-height: 100vh;
  padding-top: 72px;
}

/* ─── Navbar ────────────────────────────────────────── */
.navbar-wrapper {
  position: fixed;
  top: var(--nav-top);
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.navbar {
  width: min(var(--max-width), calc(100% - 32px));
  display: flex;
  align-items: center;
  pointer-events: none;
  position: relative;
  border-radius: var(--radius-pill);
  box-shadow:
    0 6px 6px rgba(0, 0, 0, 0.15),
    0 0 20px rgba(0, 0, 0, 0.08);
}

/* ── Liquid glass layers ─────────────────────────────── */
.liquidGlass-effect {
  position: absolute;
  z-index: 0;
  inset: 0;
  backdrop-filter: blur(8px) saturate(180%);
  -webkit-backdrop-filter: blur(8px) saturate(180%);
  filter: url(#glass-distortion);
  overflow: hidden;
  isolation: isolate;
  border-radius: var(--radius-pill);
}

.liquidGlass-tint {
  position: absolute;
  z-index: 1;
  inset: 0;
  border-radius: var(--radius-pill);
  background: rgba(252, 252, 254, 0.08);
}

[data-theme="dark"] .liquidGlass-tint {
  background: rgba(14, 16, 22, 0.28);
}

.liquidGlass-shine {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: var(--radius-pill);
  box-shadow:
    inset 2px 2px 1px 0 rgba(255, 255, 255, 0.6),
    inset -1px -1px 1px 1px rgba(255, 255, 255, 0.35);
}

.navbar-logo {
  position: relative;
  z-index: 5;
  pointer-events: all;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding: 8px 12px;
}

.navbar-logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.navbar-logo img {
  height: 22px;
  width: auto;
  display: block;
  transition: filter 0.3s ease;
}

[data-theme="dark"] .navbar-logo img {
  filter: invert(1);
}

.navbar-toggle {
  position: relative;
  z-index: 5;
  pointer-events: all;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding: 0 10px;
  margin-left: auto;
}

/* ─── Bio Card ──────────────────────────────────────── */
.bio-card {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  width: 230px;
  border-radius: var(--radius-card);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.14),
    0 2px 8px rgba(0, 0, 0, 0.08);
  z-index: 200;
}

@media (hover: hover) {
  .navbar-logo:hover .bio-card {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
  }
}

/* Glass layers inside bio-card use card radius, not pill */
.bio-card .liquidGlass-effect,
.bio-card .liquidGlass-tint,
.bio-card .liquidGlass-shine {
  border-radius: var(--radius-card);
}

.bio-card .liquidGlass-tint {
  background: rgba(248, 248, 252, 0.68);
}

[data-theme="dark"] .bio-card .liquidGlass-tint {
  background: rgba(10, 12, 20, 0.74);
}

.bio-card__body {
  position: relative;
  z-index: 3;
  padding: 16px 18px;
}

.bio-card__name {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.bio-card__divider {
  height: 1px;
  background: linear-gradient(to right, var(--accent) 40%, transparent);
  margin-bottom: 10px;
}

.bio-card__tagline {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 2px;
}

.bio-card__role {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.bio-card__awards {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--separator);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bio-card__awards li {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.5;
  padding-left: 12px;
  position: relative;
}

.bio-card__awards li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ─── Day/Night Toggle Button (jh3y / codepen LYgjpYZ) ─ */

/* All toggle-specific variables scoped to .toggle to avoid
   collisions with the blog's own CSS custom properties    */
.toggle {
  --slide-ease: cubic-bezier(0.4, -0.3, 0.6, 1.3);
  --easing: var(--slide-ease);
  --speed: 0.5s;
  --width: 60px; /* scaled down from original ~300 px */
  --ar: 8 / 3;
  --ray: hsl(0 0% 100% / 0.5);
  --sun: hsl(47, 91%, 58%);
  --moon: hsl(212, 13%, 82%);
  --crater: hsl(221, 16%, 68%);
  --bear-speed: 10s;

  -webkit-tap-highlight-color: transparent;
  width: var(--width);
  z-index: 10;
  will-change: transform;
  isolation: isolate;
  transform: translate3d(0, 0, 0);
  aspect-ratio: var(--ar);
  border-radius: 100vh;
  border: 0;
  position: relative;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  transition: background var(--speed) var(--easing);
  outline-color: transparent;
  background: hsl(
    calc(204 + (var(--dark, 0) * 25)) calc((53 - (var(--dark, 0) * 28)) * 1%)
      calc((47 - (var(--dark, 0) * 31)) * 1%)
  );
  box-shadow:
    calc(var(--width) * 0) calc(var(--width) * 0.02) calc(var(--width) * 0.01)
      calc(var(--width) * -0.0025) hsl(210 10% 100% / 0.95),
    calc(var(--width) * 0) calc(var(--width) * -0.02) calc(var(--width) * 0.01)
      calc(var(--width) * -0.0025) hsl(210 10% 10% / 0.2),
    calc(var(--width) * 0) calc(var(--width) * 0.02) calc(var(--width) * 0.5) 0
      hsl(210 10% 100% / 0.15);
}

.toggle:after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow:
    calc(var(--width) * 0) calc(var(--width) * -0.025)
      calc(var(--width) * 0.025) 0 hsl(210 10% 10% / 0.15) inset,
    calc(var(--width) * 0) calc(var(--width) * 0.025) calc(var(--width) * 0.025)
      0 hsl(210 10% 10% / 0.65) inset;
  border-radius: 100vh;
}

.toggle__content {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: 100vh;
  display: block;
  clip-path: inset(0 0 0 0 round 100vh);
  container-type: inline-size;
}

.toggle__backdrop {
  overflow: visible !important;
  position: absolute;
  bottom: 0;
  width: 100%;
  left: 0;
  transition: translate var(--speed) var(--easing);
  translate: 0 calc(var(--dark, 0) * (100% - (3 / 8 * var(--width))));
}

.toggle__backdrop:first-of-type .clouds path:first-of-type {
  fill: var(--ray);
}

[aria-pressed="false"] .toggle__backdrop:last-of-type {
  transition-timing-function: cubic-bezier(0.2, -0.6, 0.7, 1.6);
}
[aria-pressed="false"] .stars path {
  transition-delay: 0s;
}

.stars path {
  transform-box: fill-box;
  transform-origin: 25% 50%;
  scale: calc(0.25 + (var(--dark, 0) * 0.75));
  transition: scale var(--speed) calc(var(--speed) * 0.5) var(--easing);
}

.toggle__indicator-wrapper {
  position: absolute;
  inset: 0;
}

.toggle__indicator {
  height: 100%;
  aspect-ratio: 1;
  border-radius: 0%;
  display: grid;
  place-items: center;
  padding: 3%;
  transition: translate var(--speed) var(--slide-ease);
  translate: calc(var(--dark, 0) * (100cqi - 100%)) 0;
}

.toggle__star {
  height: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  transition: translate var(--speed) var(--easing);
  translate: calc((var(--dark, 0) * -10%) + 5%) 0;
}

.sun {
  background: var(--sun);
  position: absolute;
  inset: 0;
  border-radius: 50%;
  overflow: hidden;
  box-shadow:
    calc(var(--width) * 0.01) calc(var(--width) * 0.01)
      calc(var(--width) * 0.02) 0 hsl(210 10% 100% / 0.95) inset,
    calc(var(--width) * -0.01) calc(var(--width) * -0.01)
      calc(var(--width) * 0.02) 0 hsl(210 10% 20% / 0.5) inset;
}

.moon {
  position: absolute;
  inset: -1%;
  border-radius: 50%;
  background: var(--moon);
  transition: translate var(--speed) ease-in-out;
  translate: calc((100 - (var(--dark, 0) * 100)) * 1%) 0%;
  box-shadow:
    calc(var(--width) * 0.01) calc(var(--width) * 0.01)
      calc(var(--width) * 0.02) 0 hsl(210 10% 100% / 0.95) inset,
    calc(var(--width) * -0.01) calc(var(--width) * -0.01)
      calc(var(--width) * 0.02) 0 hsl(210 10% 10% / 0.95) inset;
}

.moon__crater {
  position: absolute;
  background: var(--crater);
  border-radius: 50%;
  width: calc(var(--size, 10) * 1%);
  aspect-ratio: 1;
  left: calc(var(--x) * 1%);
  top: calc(var(--y) * 1%);
  box-shadow:
    calc(var(--width) * 0.01) calc(var(--width) * 0.01)
      calc(var(--width) * 0.01) 0 hsl(210 10% 6% / 0.25) inset,
    0 calc(var(--width) * 0.005) calc(var(--width) * 0.01) 0
      hsl(210 10% 100% / 0.25);
}

.moon__crater:nth-of-type(1) {
  --size: 18;
  --x: 40;
  --y: 15;
}
.moon__crater:nth-of-type(2) {
  --size: 20;
  --x: 65;
  --y: 58;
}
.moon__crater:nth-of-type(3) {
  --size: 34;
  --x: 18;
  --y: 40;
}

.toggle__star:before {
  content: "";
  z-index: -1;
  width: 356%;
  background:
    radial-gradient(hsl(0 0% 100% / 0.25) 40%, transparent 40.5%),
    radial-gradient(hsl(0 0% 100% / 0.25) 56%, transparent 56.5%)
      hsl(0 0% 100% / 0.25);
  border-radius: 50%;
  aspect-ratio: 1;
  position: absolute;
  top: 50%;
  left: 50%;
  transition: translate var(--speed) var(--easing);
  translate: calc((50 - (var(--dark, 0) * 4)) * -1%) -50%;
}

.toggle__star:after {
  content: "";
  position: absolute;
  inset: 0;
  display: block;
  background: hsl(0 0% 0% / 0.5);
  filter: blur(4px);
  translate: 2% 4%;
  border-radius: 50%;
  z-index: -1;
}

[aria-pressed="true"] {
  --dark: 1;
}

/* Bear characters */
.pilot-bear {
  width: 18%;
  position: absolute;
  top: 70%;
  left: 100%;
  transition: translate
    calc(
      var(--speed) +
        ((1 - var(--dark, 0)) * ((var(--bear-speed) * 0.5) - var(--speed)))
    )
    calc((var(--bear-speed) * 0.5) * ((1 - var(--dark, 0)) * 0.4)) linear;
  translate: calc((0 - (1 - var(--dark, 0))) * (var(--width) + 100%))
    calc((0 - (1 - var(--dark, 0))) * 200%);
}

.pilot {
  rotate: 12deg;
  animation: fly 4s infinite ease-in-out;
}

@keyframes fly {
  50% {
    translate: 0 -25%;
  }
}

.pilot__container {
  position: absolute;
  overflow: hidden;
  inset: 0;
  clip-path: inset(0 0 0 0);
  opacity: calc(1 - var(--dark, 0));
  translate: 0 calc(var(--dark, 0) * 200%);
  transition:
    opacity var(--speed) var(--easing),
    translate var(--speed) var(--easing);
}

.astrobear__container {
  position: absolute;
  overflow: hidden;
  inset: 0;
  clip-path: inset(0 0 0 0);
  opacity: var(--dark, 0);
  translate: 0 calc(-200% + (var(--dark, 0) * 200%));
  transition:
    opacity var(--speed) var(--easing),
    translate var(--speed) var(--easing);
}

.astrobear {
  width: 12%;
  position: absolute;
  top: 100%;
  left: 0%;
  transition: translate
    calc(var(--speed) + (var(--dark, 0) * (var(--bear-speed) - var(--speed))))
    calc(var(--bear-speed) * (0.4 * var(--dark, 0))) linear;
  translate: calc(var(--dark, 0) * 400%) calc(var(--dark, 0) * -350%);
}

.astrobear svg {
  transform-origin: 50% 75%;
  scale: var(--dark, 0);
  rotate: calc(var(--dark, 0) * 360deg);
  transition:
    rotate
      calc(var(--speed) + (var(--dark, 0) * (var(--bear-speed) - var(--speed))))
      calc(var(--bear-speed) * 0.4) linear,
    scale var(--speed) ease-in-out;
}

/* Star twinkle animations */
.stars g {
  transform-box: fill-box;
  transform-origin: 50% 50%;
}
.stars g:nth-of-type(3) {
  animation: twinkle 4s -2s infinite;
}
.stars g:nth-of-type(11) {
  animation: twinkle 6s -2s infinite;
}
.stars g:nth-of-type(9) {
  animation: twinkle 4s -1s infinite;
}

@keyframes twinkle {
  0%,
  40%,
  60%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(0);
  }
}

/* ─── Main Content ──────────────────────────────────── */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0px 16px 36px;
}

/* ─── Post List (Index Page) ────────────────────────── */
.post-list {
  display: flex;
  flex-direction: column;
}

.post-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--separator);
  transition: opacity 0.18s ease;
  cursor: pointer;
}

.post-item:last-child {
  border-bottom: none;
}

@media (hover: hover) {
  .post-item:hover {
    opacity: 0.62;
  }
}

.post-item:active {
  opacity: 0.45;
}

.post-item-content {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.3px;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-meta {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.post-thumbnail {
  width: 56px;
  height: 56px;
  border: 0.5px solid var(--glass-border);
  border-radius: 10px;
  flex-shrink: 0;
  overflow: hidden;
}

.post-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.empty-state {
  padding: 48px 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 17px;
}

/* ─── Post Page ─────────────────────────────────────── */
.post-page main {
  padding-top: 12px;
}

.post-header {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--separator);
  margin-bottom: 28px;
}

.post-header h1 {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.3px;
  line-height: 1.25;
  margin-bottom: 8px;
  color: var(--text);
}

.post-date {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ─── Post Content Typography ───────────────────────── */
.post-content {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
}

.post-content > * + * {
  margin-top: 1.25em;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  font-weight: 600;
  letter-spacing: -0.2px;
  line-height: 1.3;
  color: var(--text);
  margin-top: 2em;
  margin-bottom: 0.5em;
}

.post-content h1 {
  font-size: 21px;
}
.post-content h2 {
  font-size: 19px;
}
.post-content h3 {
  font-size: 17px;
}
.post-content h4 {
  font-size: 15px;
  letter-spacing: 0;
}

.post-content p {
  margin-bottom: 0;
}

.post-content a {
  color: #0071e3;
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 113, 227, 0.3);
  transition: border-color 0.15s ease;
}

.post-content a:hover {
  border-bottom-color: #0071e3;
}

[data-theme="dark"] .post-content a {
  color: #3b9eff;
  border-bottom-color: rgba(59, 158, 255, 0.3);
}

[data-theme="dark"] .post-content a:hover {
  border-bottom-color: #3b9eff;
}

.post-content strong {
  font-weight: 600;
  color: var(--text);
}

.post-content em {
  font-style: italic;
}

.post-content code {
  font-family:
    "SF Mono", ui-monospace, "Cascadia Code", "Fira Code", Menlo, Monaco,
    monospace;
  font-size: 0.85em;
  background: rgba(0, 0, 0, 0.06);
  color: var(--text);
  padding: 2px 6px;
  border-radius: 5px;
}

.post-content pre,
.post-content .shiki {
  /* Shiki provides background via inline style; we supply the rest */
  border: 1px solid var(--separator);
  padding: 16px 20px;
  border-radius: var(--radius-card);
  overflow-x: auto;
  margin-top: 1.25em;
  margin-bottom: 0;
  font-size: 0.8125em; /* 13px at 16px base */
  line-height: 1.65;
}

/* ── Shiki dark-mode token override ── */
[data-theme="dark"] .shiki,
[data-theme="dark"] .shiki span {
  color: var(--shiki-dark) !important;
  background-color: var(--shiki-dark-bg) !important;
  font-style: var(--shiki-dark-font-style) !important;
  font-weight: var(--shiki-dark-font-weight) !important;
}

.post-content pre code,
.post-content .shiki code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  border-radius: 0;
}

.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  color: var(--text-secondary);
  margin-left: 0;
}

.post-content ul,
.post-content ol {
  padding-left: 22px;
}

.post-content li + li {
  margin-top: 0.3em;
}

.post-content img {
  max-width: 100%;
  border-radius: var(--radius-card);
  display: block;
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--separator);
  margin: 2em 0;
}

.post-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9em;
}

.post-content thead th:first-child {
  border-top-left-radius: var(--radius-card);
}

.post-content thead th:last-child {
  border-top-right-radius: var(--radius-card);
}

.post-content thead tr {
  background: rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .post-content thead tr {
  background: rgba(255, 255, 255, 0.06);
}

.post-content th,
.post-content td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--separator);
}

.post-content th {
  font-weight: 400;
  color: var(--text-secondary);
}

/* ─── Post Navigation ───────────────────────────────── */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--separator);
}

.post-nav__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: calc(50% - 6px);
  text-decoration: none;
  color: inherit;
  transition: opacity 0.18s ease;
}

.post-nav__item--empty {
  pointer-events: none;
}

.post-nav__item--next {
  text-align: right;
  margin-left: auto;
}

@media (hover: hover) {
  .post-nav__item:hover {
    opacity: 0.62;
  }
}

.post-nav__item:active {
  opacity: 0.45;
}

.post-nav__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
}

.post-nav__title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Site Footer (Index Page) ──────────────────────── */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--separator);
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer__rss {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.18s ease;
}

@media (hover: hover) {
  .site-footer__rss:hover {
    color: var(--text);
  }
}

/* ─── Back to Home ──────────────────────────────────── */
.post-back {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.post-back__link {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.18s ease;
}

@media (hover: hover) {
  .post-back__link:hover {
    color: var(--text);
  }
}

.post-back__link:active {
  color: var(--text);
}

.post-back__rss {
  font-size: 13px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.18s ease;
}

@media (hover: hover) {
  .post-back__rss:hover {
    color: var(--text);
  }
}

/* ─── Responsive ────────────────────────────────────── */
@media (max-width: 640px) {
  .post-title {
    font-size: 21px;
  }
  .post-header h1 {
    font-size: 21px;
  }
  .post-content {
    font-size: 17px;
  }
}