/* Static MD3 baseline tokens prevent a flash before the local M3E runtime upgrades. */
html {
  color-scheme: light dark;
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;
  --md-sys-color-tertiary: #7D5260;
  --md-sys-color-on-tertiary: #FFFFFF;
  --md-sys-color-tertiary-container: #FFD8E4;
  --md-sys-color-on-tertiary-container: #31111D;
  --md-sys-color-error: #B3261E;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #F9DEDC;
  --md-sys-color-on-error-container: #410E0B;
  --md-sys-color-surface: #FEF7FF;
  --md-sys-color-background: #FEF7FF;
  --md-sys-color-on-background: #1D1B20;
  --md-sys-color-on-surface: #1D1B20;
  --md-sys-color-on-surface-variant: #49454F;
  --md-sys-color-surface-container-low: #F7F2FA;
  --md-sys-color-surface-container: #F3EDF7;
  --md-sys-color-surface-container-high: #ECE6F0;
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  --md-sys-color-inverse-surface: #322F35;
  --md-sys-color-inverse-on-surface: #F5EFF7;
  --md-sys-color-inverse-primary: #D0BCFF;
}

@media (prefers-color-scheme: dark) {
  html {
    --md-sys-color-primary: #D0BCFF;
    --md-sys-color-on-primary: #381E72;
    --md-sys-color-primary-container: #4F378B;
    --md-sys-color-on-primary-container: #EADDFF;
    --md-sys-color-secondary: #CCC2DC;
    --md-sys-color-on-secondary: #332D41;
    --md-sys-color-secondary-container: #4A4458;
    --md-sys-color-on-secondary-container: #E8DEF8;
    --md-sys-color-tertiary: #EFB8C8;
    --md-sys-color-on-tertiary: #492532;
    --md-sys-color-tertiary-container: #633B48;
    --md-sys-color-on-tertiary-container: #FFD8E4;
    --md-sys-color-error: #F2B8B5;
    --md-sys-color-on-error: #601410;
    --md-sys-color-error-container: #8C1D18;
    --md-sys-color-on-error-container: #F9DEDC;
    --md-sys-color-surface: #141218;
    --md-sys-color-background: #141218;
    --md-sys-color-on-background: #E6E0E9;
    --md-sys-color-on-surface: #E6E0E9;
    --md-sys-color-on-surface-variant: #CAC4D0;
    --md-sys-color-surface-container-low: #1D1B20;
    --md-sys-color-surface-container: #211F26;
    --md-sys-color-surface-container-high: #2B2930;
    --md-sys-color-outline: #938F99;
    --md-sys-color-outline-variant: #49454F;
    --md-sys-color-inverse-surface: #E6E0E9;
    --md-sys-color-inverse-on-surface: #313033;
    --md-sys-color-inverse-primary: #6750A4;
  }
}

html {
  background: var(--md-sys-color-surface);
  scrollbar-color: var(--md-sys-color-on-surface-variant) var(--md-sys-color-surface);
}

m3e-theme {
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
}

/* The runtime writes MD3 body typography onto <body>; Cosmos keeps its own reading rhythm. */
body {
  font-size: 16px !important;
  font-weight: 400 !important;
  line-height: 1.65 !important;
  letter-spacing: normal !important;
}

::selection {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

@media (forced-colors: active) {
  m3e-theme { forced-color-adjust: none; }
}

/* Header color picker */
.color-toggle .icon { width: 21px; height: 21px; }

/* The dialog keeps its own header element, so the title and close button live in that slot. */
.color-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; margin-block: -10px; }
.color-heading { font-weight: 600; }
.color-close { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; color: var(--md-sys-color-on-surface-variant); }
.color-close:hover { background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface); }
.color-close svg { width: 16px; height: 16px; }

/* Square dialog keeps the editorial grid; the shape token is M3E's own override. */
/* Bind M3E component tokens to the palette this site actually maintains. */
.color-dialog {
  --m3e-dialog-shape: 0;
  --m3e-dialog-min-width: min(364px, calc(100vw - 32px));
  --m3e-dialog-max-width: min(448px, calc(100vw - 32px));
  --m3e-dialog-container-color: var(--md-sys-color-surface-container-low);
  --m3e-dialog-header-container-color: var(--md-sys-color-surface-container-low);
  --m3e-dialog-color: var(--md-sys-color-on-surface);
  --m3e-dialog-header-color: var(--md-sys-color-on-surface);
  --m3e-dialog-content-color: var(--md-sys-color-on-surface-variant);
}
.color-toggle:hover { color: var(--md-sys-color-primary); }

/* Bottom padding gives the selection ring room; the dialog content clips its own edges. */
.color-picker { display: grid; gap: 14px; padding-block: 14px 12px; }

/* Before the runtime defines it, m3e-dialog is a plain unknown element; keep its light DOM out of the page. */
m3e-dialog:not(:defined):not(.is-fallback) { display: none; }

.color-dialog.is-fallback {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 60;
  display: block;
  width: min(380px, calc(100vw - 32px));
  padding: 22px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background: var(--md-sys-color-surface-container-low);
  box-shadow: 0 18px 48px color-mix(in srgb, var(--md-sys-color-on-surface) 24%, transparent);
}

.color-dialog.is-fallback .color-picker-title { display: none; }
.color-dialog.is-fallback .color-picker-row { display: none; }
.color-picker-error { margin: 0; font-size: 13px; line-height: 1.6; color: var(--md-sys-color-error); }

.color-picker-title { margin: 0; font-size: 12px; line-height: 1.5; color: var(--md-sys-color-on-surface-variant); }

.color-picker-row { display: flex; align-items: center; gap: 6px; width: 100%; justify-content: space-between; }

.color-swatch {
  width: 24px;
  height: 24px;
  padding: 0;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--swatch);
  border: 1px solid var(--md-sys-color-outline);
}
/* Hover must not resize the swatch: a ring keeps the row height fixed. */
.color-swatch:hover { outline: 2px solid color-mix(in srgb, var(--md-sys-color-on-surface) 40%, transparent); outline-offset: 2px; }
.color-swatch[aria-pressed="true"] { outline: 2px solid var(--md-sys-color-on-surface); outline-offset: 2px; }

/* Custom entry: icon by default, solid fill once the visitor picks a colour. */
.color-custom {
  position: relative;
  display: grid;
  place-items: center;
  padding: 0;
  cursor: pointer;
  background: none;
  color: var(--md-sys-color-on-surface-variant);
}
.color-custom input { position: absolute; inset: 0; width: 100%; height: 100%; padding: 0; border: 0; opacity: 0; cursor: pointer; }
.color-custom .color-custom-icon { width: 14px; height: 14px; }
.color-custom .color-custom-fill { display: none; position: absolute; inset: 0; border-radius: inherit; background: var(--swatch); }
.color-custom.has-color { border-color: transparent; }
.color-custom.has-color .color-custom-icon { visibility: hidden; }
.color-custom.has-color .color-custom-fill { display: block; }

/* Theme variant chips. */
.color-variants { display: flex; flex-wrap: wrap; gap: 8px; }
.color-variant {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  font-size: 12px;
  line-height: 1;
  color: var(--md-sys-color-on-surface-variant);
  transition: background 150ms, color 150ms, border-color 150ms;
}
.color-variant:hover { border-color: var(--md-sys-color-outline); color: var(--md-sys-color-on-surface); }
.color-variant[aria-checked="true"] {
  background: var(--md-sys-color-secondary-container);
  border-color: transparent;
  color: var(--md-sys-color-on-secondary-container);
}

/* Animate palette swaps instead of hard-cutting. */
@property --md-sys-color-primary { syntax: '<color>'; inherits: true; initial-value: #6750A4; }
@property --md-sys-color-on-primary { syntax: '<color>'; inherits: true; initial-value: #FFFFFF; }
@property --md-sys-color-primary-container { syntax: '<color>'; inherits: true; initial-value: #EADDFF; }
@property --md-sys-color-on-primary-container { syntax: '<color>'; inherits: true; initial-value: #21005D; }
@property --md-sys-color-secondary-container { syntax: '<color>'; inherits: true; initial-value: #E8DEF8; }
@property --md-sys-color-on-secondary-container { syntax: '<color>'; inherits: true; initial-value: #1D192B; }
@property --md-sys-color-tertiary { syntax: '<color>'; inherits: true; initial-value: #7D5260; }
@property --md-sys-color-surface { syntax: '<color>'; inherits: true; initial-value: #FEF7FF; }
@property --md-sys-color-background { syntax: '<color>'; inherits: true; initial-value: #FEF7FF; }
@property --md-sys-color-on-background { syntax: '<color>'; inherits: true; initial-value: #1D1B20; }
@property --md-sys-color-on-surface { syntax: '<color>'; inherits: true; initial-value: #1D1B20; }
@property --md-sys-color-on-surface-variant { syntax: '<color>'; inherits: true; initial-value: #49454F; }
@property --md-sys-color-surface-container-low { syntax: '<color>'; inherits: true; initial-value: #F7F2FA; }
@property --md-sys-color-outline { syntax: '<color>'; inherits: true; initial-value: #79747E; }
@property --md-sys-color-outline-variant { syntax: '<color>'; inherits: true; initial-value: #CAC4D0; }

html { --m3e-morph-duration: 1000ms; }

html.m3e-morph {
  transition-property: --md-sys-color-primary, --md-sys-color-on-primary, --md-sys-color-primary-container,
    --md-sys-color-on-primary-container, --md-sys-color-secondary-container, --md-sys-color-on-secondary-container,
    --md-sys-color-tertiary, --md-sys-color-surface, --md-sys-color-background, --md-sys-color-on-background,
    --md-sys-color-on-surface, --md-sys-color-on-surface-variant,
    --md-sys-color-surface-container-low, --md-sys-color-outline, --md-sys-color-outline-variant;
  transition-duration: var(--m3e-morph-duration);
  transition-timing-function: cubic-bezier(.4, 0, .2, 1);
}

@media (prefers-reduced-motion: reduce) {
  html.m3e-morph { transition: none; }
}

/* Cosmos aliases must follow the animated tokens frame by frame. */
@property --paper { syntax: '<color>'; inherits: true; initial-value: #FEF7FF; }
@property --paper-low { syntax: '<color>'; inherits: true; initial-value: #F7F2FA; }
@property --ink { syntax: '<color>'; inherits: true; initial-value: #1D1B20; }
@property --muted { syntax: '<color>'; inherits: true; initial-value: #49454F; }
@property --accent { syntax: '<color>'; inherits: true; initial-value: #6750A4; }
@property --honey { syntax: '<color>'; inherits: true; initial-value: #E8DEF8; }
@property --rule { syntax: '<color>'; inherits: true; initial-value: #CAC4D0; }

/* GitHub alerts render through m3e-callout; only layout is ours. */
/* The theme nudges link arrows 3px right on hover; keep that inside the sticky sidebar. */
.profile-contact-row { padding-inline-end: 4px; }

.prose m3e-callout { display: block; margin: 28px 0; }
.prose m3e-callout svg[slot="icon"] { width: 18px; height: 18px; flex: none; }
.prose m3e-callout p { margin: 0; font: inherit; }
.prose m3e-callout p + p { margin-top: 10px; }

/* While the module is in flight the raw markup holds the box and a ring covers it. */
.prose m3e-callout:not(:defined) {
  --callout-bg: var(--md-sys-color-surface-container);
  position: relative;
  padding: 12px 16px;
  background: var(--callout-bg);
}
.prose m3e-callout:not(:defined).callout-tip { --callout-bg: var(--md-sys-color-secondary-container); }
.prose m3e-callout:not(:defined).callout-important { --callout-bg: var(--md-sys-color-primary-container); }
.prose m3e-callout:not(:defined).callout-warning { --callout-bg: var(--md-sys-color-tertiary-container); }
.prose m3e-callout:not(:defined).callout-caution { --callout-bg: var(--md-sys-color-error-container); }
.prose m3e-callout:not(:defined) { font-size: 16px; line-height: 24px; }
.prose m3e-callout:not(:defined) [slot="label"] { display: block; margin: 0 0 16px; }
.prose m3e-callout:not(:defined) svg[slot="icon"] { display: none; }
.prose m3e-callout:not(:defined) > * { visibility: hidden; }
.prose m3e-callout:not(:defined)::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  width: 20px;
  height: 20px;
  border: 2px solid var(--md-sys-color-outline-variant);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: callout-spin 700ms linear infinite;
}
@keyframes callout-spin { to { rotate: 360deg; } }
@media (prefers-reduced-motion: reduce) {
  .prose m3e-callout:not(:defined)::after { animation: none; }
}



/* Highlight sweeps in when it scrolls into view; without the script it stays solid. */
html.highlight-motion .prose mark {
  /* The theme paints mark with the background shorthand; clear it so only the sweep shows. */
  background-color: transparent;
  background-image: linear-gradient(var(--md-sys-color-secondary-container), var(--md-sys-color-secondary-container));
  background-repeat: no-repeat;
  background-position: left center;
  background-size: 0% 100%;
  color: var(--md-sys-color-on-surface);
  transition: background-size 620ms cubic-bezier(.4, 0, .2, 1);
}
html.highlight-motion .prose mark.is-shown { background-size: 100% 100%; }
@media (prefers-reduced-motion: reduce) {
  html.highlight-motion .prose mark { background-size: 100% 100%; transition: none; }
}

/* KaTeX display blocks and Mermaid diagrams. */
.prose .katex-display { margin: 26px 0; overflow-x: auto; overflow-y: hidden; padding-block: 2px; }
.prose .mermaid { display: flex; justify-content: center; margin: 28px 0; visibility: hidden; }
.prose .mermaid[data-processed] { visibility: visible; }
.prose .mermaid svg { max-width: 100%; height: auto; }




/* Tag chips animate their underline instead of popping it in. */
[data-archive-tags] a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1px;
  height: 2px;
  background: var(--md-sys-color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 260ms cubic-bezier(.16, 1, .3, 1);
}
[data-archive-tags] a[aria-current]::after { transform: scaleX(1); }

@media (prefers-reduced-motion: reduce) {
  [data-archive-tags] a::after { transition: none; }
}

/* Archive: year sections with tag filtering. */
.archive-years { display: grid; gap: 40px; padding-top: 26px; }
.archive-year-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font-size: 27px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.archive-year-count { font-size: 12px; font-weight: 400; color: var(--md-sys-color-on-surface-variant); font-variant-numeric: tabular-nums; }
.archive-entry[hidden], .archive-year[hidden] { display: none; }
/* Each entry is the only child of its wrapper, so the theme's :first-child reset would strip all top padding. */
.archive-entry .entry { padding-top: 29px; }
.archive-status { margin: 32px 0 0; font-size: 15px; color: var(--md-sys-color-on-surface-variant); }


/* Tags sit in the article meta row. */
.entry-meta .entry-tags { display: inline-flex; flex-wrap: wrap; gap: 10px; position: relative; z-index: 2; }
.entry-meta .entry-tags a { color: var(--md-sys-color-on-surface-variant); transition: color 160ms; }
.entry-meta .entry-tags a:hover { color: var(--md-sys-color-primary); }