@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Atkinson+Hyperlegible+Mono&family=STIX+Two+Text&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Roboto+Serif:ital,opsz,wght@0,8..144,100..900;1,8..144,100..900&display=swap');

/* =========================================
   ROOT VARIABLES + ICONS + COLORS + COMPLETE SYSTEM
   (Merged from Obsidian + Calc2 + Glossary + Hover)
   ========================================= */

html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

:root {
  --paper-bg: #dde2ee;
  --callout-information: 204, 121, 167;
  --callout-action: 230, 159, 0;
  --callout-resolution: 0, 158, 115;

  --callout-alert: 215, 38, 61;
  --callout-meta: 51, 34, 136;

  --callout-info-action: 217, 140, 84;
  --callout-info-resolution: 102, 140, 141;
  --callout-action-resolution: 115, 158, 58;
  --callout-all: 145, 146, 94;

  --callout-coffee: 150, 110, 80;

  --font-sans: 'Atkinson Hyperlegible', Arial, sans-serif;
  --font-serif: 'Roboto Serif', serif;

  --color-info-text: 45, 68, 180;
  --c-info-text: rgb(var(--color-info-text));
  --ink: #2c3040;         /* primary text */
  --ink-soft:   #3a4156;  /* slightly darker than before */
  --ink-subtle: #4a5166;  /* ✅ now passes AA */

  --code-background: var(--ink-soft);
  --code-normal: var(--paper-bg);
  --code-comment: #a0a0a0;
  --code-keyword: #ff79c6;
  --code-string: #50fa7b;
}



/* =========================================
   DARK MODE (SYSTEM)
   ========================================= */

/* System dark mode (standalone) */
@media (prefers-color-scheme: dark) {
  :root {
    --paper-bg: #1a1d2b;
    --callout-information: 86, 180, 233;
    --callout-action: 230, 210, 120;
    --callout-resolution: 80, 196, 45;
    --callout-alert: 240, 170, 210;
    --callout-meta: 108, 117, 125;

    --callout-info-action: 158, 195, 177;
    --callout-info-resolution: 83, 188, 139;
    --callout-action-resolution: 155, 203, 83;
    --callout-all: 132, 195, 133;

    --callout-coffee: 150, 110, 80;

    --background-primary: #1A1D2B;
    --background-secondary: #161925;
    --background-tertiary: #202336;

    --ink: #e6eaf2;
    --ink-soft: #b8c0d4;
    --ink-subtle: #9aa3bd;

    --callout-title-text: #dddddd;
    --color-info-text: 120, 205, 245;
    --c-info-text: rgb(var(--color-info-text));
  }
}


/* =========================================
   ICON VARIABLES (Lucide-based, already defined)
   ========================================= */

:root {
  --icon-coffee: url("../icons/coffee.svg");
  --icon-bike: url("../icons/bike.svg");
  --icon-info: url("../icons/info.svg");
  --icon-navigation: url("../icons/navigation.svg");
  --icon-octagon-x: url("../icons/octagon-x.svg");
  --icon-blocks: url("../icons/blocks.svg");
  --icon-landmark: url("../icons/landmark.svg");

  --icon-book: url("../icons/book.svg");
  --icon-book-marked: url("../icons/book-marked.svg");
  --icon-book-open-text: url("../icons/book-open-text.svg");
  --icon-book-search: url("../icons/book-search.svg");
  --icon-scan-eye: url("../icons/scan-eye.svg");

  --icon-hat-glasses: url("../icons/hat-glasses.svg");
  --icon-dumbbell: url("../icons/dumbbell.svg");
  --icon-flame-kindling: url("../icons/flame-kindling.svg");
  --icon-list-todo: url("../icons/list-todo.svg");

  --icon-compass: url("../icons/compass.svg");
  --icon-map: url("../icons/map.svg");
  --icon-map-pinned: url("../icons/map-pinned.svg");
  --icon-map-pin: url("../icons/map-pin.svg");
  --icon-puzzle: url("../icons/puzzle.svg");
  --icon-combine: url("../icons/combine.svg");
  --icon-waypoints: url("../icons/waypoints.svg");

  --icon-bookmark: url("../icons/bookmark.svg");
  --icon-library-big: url("../icons/library-big.svg");
  --icon-telescope: url("../icons/telescope.svg");

  --icon-spotlight: url("../icons/spotlight.svg");
  --icon-paperclip: url("../icons/paperclip.svg");
  --icon-luggage: url("../icons/luggage.svg");

  --icon-messages-square: url("../icons/messages-square.svg");

  --icon-triangle-alert: url("../icons/triangle-alert.svg");
  --icon-octagon-alert: url("../icons/octagon-alert.svg");

  --icon-megaphone: url("../icons/megaphone.svg");

  --icon-message-circle-question-mark: url("../icons/message-circle-question-mark.svg");
  --icon-flag: url("../icons/flag.svg");
  --icon-quote: url("../icons/quote.svg");
}


/* =========================================
   BASE PAGE
   ========================================= */

html {
  font-family: var(--font-sans);
  line-height: 1.65;
  color: var(--ink);
}

body {
  margin: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;

  background: radial-gradient(
    circle at center,
    var(--paper-bg) 0%,
    color-mix(in srgb, var(--paper-bg) 90%, var(--ink)) 50%,
    color-mix(in srgb, var(--paper-bg) 60%, var(--ink)) 100%
  );

  background-repeat: no-repeat;
  background-size: cover;
}


header, footer {
  max-width: 750px;
  margin: 0 auto;
  padding: 1rem 2rem;
}

.content-area {
  max-width: 750px;
  margin:  0 auto;
  padding: .25rem 2.75rem;

  background: var(--paper-bg);
  border-radius: 12px;

  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.06),     /* contact shadow */
    0 8px 24px rgba(0, 0, 0, 0.10);    /* ambient depth */
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Roboto Serif', Georgia, serif;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Basic Links */
a {
  color: var(--c-info-text);
  text-decoration: underline dotted;
  text-underline-offset: 3px;
  text-decoration-color: rgba(var(--color-info), 0.55);
  text-decoration-thickness: 1px;

  &:hover {
    text-decoration-style: solid;
    text-decoration-color: rgba(var(--color-info), 1);
  }
}

/* =========================================
   CALLOUT COLOR ASSIGNMENT
   ========================================= */

.callout[data-callout="note"] {
  --callout-color: var(--callout-coffee);
}

.callout[data-callout="strategy"],
.callout[data-callout="tip"],
.callout[data-callout="caution"],
.callout[data-callout="remark"] {
  --callout-color: var(--callout-meta);
}

.callout[data-callout="discuss"],
.callout[data-callout="announcement"],
.callout[data-callout="warning"] {
  --callout-color: var(--callout-alert);
}

.callout[data-callout="done"] {
  --callout-color: var(--callout-resolution);
}

.callout[data-callout="todo"],
.callout[data-callout="exercise"],
.callout[data-callout="warmup"] {
  --callout-color: var(--callout-action);
}

.callout[data-callout="info"],
.callout[data-callout="notation"],
.callout[data-callout="definition"],
.callout[data-callout="fact"],
.callout[data-callout="quote"] {
  --callout-color: var(--callout-information);
}

.callout[data-callout="hint"],
.callout[data-callout="preview"],
.callout[data-callout="goals"] {
  --callout-color: var(--callout-info-resolution);
}

.callout[data-callout="corollary"],
.callout[data-callout="proposition"],
.callout[data-callout="example"],
.callout[data-callout="recall"] {
  --callout-color: var(--callout-info-action);
}

.callout[data-callout="steps"],
.callout[data-callout="experiment"],
.callout[data-callout="investigate"],
.callout[data-callout="assemble"],
.callout[data-callout="waypoint"],
.callout[data-callout="waypoints"],
.callout[data-callout="prompt"] {
  --callout-color: var(--callout-action-resolution);
}

.callout[data-callout="solution"],
.callout[data-callout="theorem"],
.callout[data-callout="answer"],
.callout[data-callout="visual"],
.callout[data-callout="proof"] {
  --callout-color: var(--callout-all);
}

/* =========================================
   BASE CALLOUT
   ========================================= */

.callout {
  --callout-intensity: 0.12;
  --callout-border-width: 4px;

  border-left: var(--callout-border-width) solid rgb(var(--callout-color));
  border-radius: 8px;
  overflow: hidden;
  /* ✅ prevents bleed */
  background: rgba(var(--callout-color), var(--callout-intensity));
  margin: 1em 0;
}

fieldset.task-list-group {
  border: none;
  margin: 0;
  padding: 0;
}

.callout-content {
  padding: 0.6em 0.9em 0.8em;
}

.callout .callout {
  margin: 0.75em 0;
}

/* Fix callout titles as headings for ARIA structure. */
.callout summary>* {
  display: inline;
  margin: 0;
  padding: 0;
  font-size: 1.2rem;
}

/* =========================================
   TITLE
   ========================================= */

.callout-icon {
  width: 0 !important;
  min-width: 0 !important;
  overflow: hidden !important;
}

.task-list {
  list-style: none;
  padding-left: 20px;
}

li:has(input[type="checkbox"]) {
  list-style: none;
  margin-left: -20px;
}

.callout-title {
  font-family: var(--font-serif);
  display: flex !important;
  align-items: center !important;
  gap: 0.1em !important;
  padding: 0.5em 0.5em 0.5em 0.35em !important;
  background: rgba(var(--callout-color), 0.22) !important;
  font-weight: 600 !important;

  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  text-shadow: 0 0.4px 0 rgba(0, 0, 0, 0.25);
  font-size: 1.2rem;
}
/* headings inherit the container styling */
.callout-title h1,
.callout-title h2,
.callout-title h3,
.callout-title h4,
.callout-title h5,
.callout-title h6 {
  margin: 0;
  padding: 0;

  font: inherit;
  color: inherit;
  text-shadow: inherit;

  display: inline;
}

/*
.callout-title::before {
  content: "";
  display: inline-block;

  width: 1.2rem;
  height: 1.2rem;
  flex-shrink: 0;
  margin-right: 0.15em;

  background-image: var(--icon, var(--icon-coffee));
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;

  transform: translateY(-1px);
  font-size: 1.2rem;
}*/

/* Trying webkit scheme for stroke colors */
.callout-title::before {
  content: "";

  width: 1.2rem;
  height: 1.2rem;

  background-color: currentColor;

  -webkit-mask-image: var(--icon);
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  -webkit-mask-size: contain;

  mask-image: var(--icon);
  mask-repeat: no-repeat;
  mask-position: center;
  mask-size: contain;
}

/* =========================================
   INTENSITY TIERS (FULL)
   ========================================= */

.callout[data-callout="strategy"],
.callout[data-callout="tip"],
.callout[data-callout="hint"],
.callout[data-callout="remark"] {
  --callout-intensity: 0.08;
  --callout-border-width: 2px;
}

.callout[data-callout="notation"],
.callout[data-callout="fact"],
.callout[data-callout="proposition"],
.callout[data-callout="note"],
.callout[data-callout="answer"],
.callout[data-callout="info"],
.callout[data-callout="definition"],
.callout[data-callout="todo"],
.callout[data-callout="corollary"],
.callout[data-callout="quote"],
.callout[data-callout="example"],
.callout[data-callout="steps"],
.callout[data-callout="visual"],
.callout[data-callout="exercise"],
.callout[data-callout="goals"],
.callout[data-callout="recall"],
.callout[data-callout="preview"] {
  --callout-intensity: 0.14;
  --callout-border-width: 3px;
}

.callout[data-callout="waypoint"],
.callout[data-callout="waypoints"],
.callout[data-callout="experiment"],
.callout[data-callout="prompt"],
.callout[data-callout="investigate"],
.callout[data-callout="announcement"],
.callout[data-callout="discuss"],
.callout[data-callout="theorem"],
.callout[data-callout="caution"],
.callout[data-callout="solution"],
.callout[data-callout="proof"] {
  --callout-intensity: 0.22;
  --callout-border-width: 4px;
}

.callout[data-callout="warning"],
.callout[data-callout="assemble"],
.callout[data-callout="done"] {
  --callout-intensity: 0.26;
  --callout-border-width: 4.5px;
}

/* =========================================
   GLOSSARY INLINE
   ========================================= */

mark {
  background: rgba(var(--callout-information), 0.25) !important;
  border-bottom: 1px solid rgba(var(--callout-information), 0.85);
  color: var(--ink-soft);
  padding: 0 0.1em;
  border-radius: 5px;
}

/* Remove base mark styling when it contains a glossary */
mark:has(> .glossary) {
  background: none !important;
  border-bottom: none !important;
}

/* Target glossary span instead of internal link like in Obsidian CSS */
mark>.glossary {
  cursor: help;
  text-decoration: none !important;
  background: rgba(var(--callout-information), 0.25) !important;
  border-left: 3px solid rgba(var(--callout-information), 1);
  padding-right: 2px;
}

/* Hover effect */
mark>.glossary:hover {
  border-bottom: 2px solid rgba(var(--callout-information), 1);
}

.glossary {
  position: relative;
}

.glossary::before {
  content: "";
  position: absolute;

  width: 45px;
  height: 45px;

  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}


/* =========================================
   GLOSSARY EMBEDS
   ========================================= */

.internal-embed.inline-embed[src*="Glossary"] {
  display: block !important;
  width: 100%;
}

.internal-embed[src*="Glossary"] {
  margin: 0.9em 0 !important;
}

/* =========================================
   HOVER
   ========================================= */

.popover .callout-content {
  display: block !important;
}

.popover .callout-fold {
  display: none !important;
}

/* =========================================
   DARK MODE CALLOUT SYSTEM
   ========================================= */
@media (prefers-color-scheme: dark) {
  :root {
    --background-primary: #1A1D2B;
    --background-secondary: #161925;
    --background-tertiary: #202336;

    --callout-title-text: #dddddd;

    background: var(--background-primary);
  }

  .callout {
    background-color: rgba(255, 255, 255, 0.03);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);

    background-image: linear-gradient(rgba(var(--callout-color), 0.18),
        rgba(var(--callout-color), 0.18));
  }

  .callout-title {
    color: var(--callout-title-text) !important;
  }

  .callout-title::before {
    filter: brightness(1.8) contrast(1.1);
  }

  .callout-content {
    color: var(--ink);
    text-shadow: 0 0.2px 0 rgba(0, 0, 0, 0.25);
  }


  body::before {
    background: radial-gradient(
      circle at 50% 35%,
      color-mix(in srgb, var(--paper-bg) 55%, var(--ink)) 0%,   /* lighter center */
      color-mix(in srgb, var(--paper-bg) 70%, var(--ink)) 45%,
      color-mix(in srgb, var(--paper-bg) 80%, var(--ink)) 75%,
      color-mix(in srgb, var(--paper-bg) 90%, var(--ink)) 100%  /* darker edges */
    );
  }

}

/* =========================================
   DARK MODE GLOSSARY POPUP FIX
   ========================================= */

/* Standalone system dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --background-primary: #1A1D2B;
    --background-secondary: #161925;
    --background-tertiary: #202336;

    --callout-title-text: #dddddd;
  }
  
  .glossary-popup {
    background-color: var(--background-primary);

    background-image: linear-gradient(rgba(var(--popup-color), 0.16),
        rgba(var(--popup-color), 0.16));

    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 3px solid rgb(var(--popup-color));
  }
}

@media (prefers-color-scheme: dark) {
  .glossary-popup-title {
    background: rgba(var(--popup-color), 0.22);
    color: var(--callout-title-text);
  }
}

@media (prefers-color-scheme: dark) {
  .glossary-popup {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

/* =========================================
   ICON ASSIGNMENT (SAFE LAST LAYER)
   ========================================= */

/* Knowledge */

.callout[data-callout="proof"] {
  --icon: var(--icon-combine);
}

.callout[data-callout="info"] {
  --icon: var(--icon-info);
}

.callout[data-callout="notation"] {
  --icon: var(--icon-book-type);
}

.glossary-popup[data-type="fact"] {
  --icon: var(--icon-book);
}

.callout[data-callout="fact"] {
  --icon: var(--icon-book);
}

.glossary-popup[data-type="definition"] {
  --icon: var(--icon-book-marked);
}

.callout[data-callout="definition"] {
  --icon: var(--icon-book-marked);
}

.callout[data-callout="answer"],
.callout[data-callout="proposition"],
.callout[data-callout="corollary"] {
  --icon: var(--icon-library-big);
}

.glossary-popup[data-type="theorem"] {
  --icon: var(--icon-book-search);
}

.callout[data-callout="theorem"] {
  --icon: var(--icon-book-search);
}

/* Representation */

.callout[data-callout="visual"] {
  --icon: var(--icon-scan-eye);
}

.callout[data-callout="example"] {
  --icon: var(--icon-landmark);
}

/* Navigation */

.callout[data-callout="hint"] {
  --icon: var(--icon-compass);
}

.callout[data-callout="steps"] {
  --icon: var(--icon-map);
}

.callout[data-callout="assemble"] {
  --icon: var(--icon-puzzle);
}

.callout[data-callout="solution"] {
  --icon: var(--icon-map);
}

.callout[data-callout="done"] {
  --icon: var(--icon-map-pinned);
}

/* Action */

.callout[data-callout="experiment"] {
  --icon: var(--icon-hat-glasses);
}

.callout[data-callout="waypoint"],
.callout[data-callout="waypoints"] {
  --icon: var(--icon-waypoints);
}

.callout[data-callout="exercise"] {
  --icon: var(--icon-bike);
}

.callout[data-callout="warmup"] {
  --icon: var(--icon-flame-kindling);
}

.callout[data-callout="todo"] {
  --icon: var(--icon-list-todo);
}

.callout[data-callout="prompt"] {
  --icon: var(--icon-message-circle-question-mark);
}

/* Meta */

.callout[data-callout="strategy"] {
  --icon: var(--icon-luggage);
}

.callout[data-callout="tip"] {
  --icon: var(--icon-navigation);
}

.callout[data-callout="remark"] {
  --icon: var(--icon-paperclip);
}

.callout[data-callout="quote"] {
  --icon: var(--icon-quote);
}

/* Temporal */

.callout[data-callout="recall"] {
  --icon: var(--icon-bookmark);
}

.callout[data-callout="preview"] {
  --icon: var(--icon-telescope);
}

/* Warnings */

.callout[data-callout="caution"] {
  --icon: var(--icon-triangle-alert);
}

.callout[data-callout="warning"] {
  --icon: var(--icon-octagon-x);
}

/* Announcement */

.callout[data-callout="announcement"] {
  --icon: var(--icon-megaphone);
}

/* Structure */

.callout[data-callout="goals"] {
  --icon: var(--icon-map-pin);
}

.callout[data-callout="discuss"] {
  --icon: var(--icon-messages-square);
}

/* Note */

.callout[data-callout="note"] {
  --icon: var(--icon-coffee);
}

/* fallback */
[data-type] {
  --icon: var(--icon-coffee);
}

/* =========================
   Anchor (positioning context)
========================= */

.glossary-anchor {
  position: relative;
  display: inline-block;
}

/* =========================
   Glossary term
========================= */

.glossary {
  color: color-mix(in srgb, var(--c-info-text) 95%,var(--ink));
  cursor: help;
  border-bottom: 1px dotted currentColor;
  padding: 0 0 0 .2em;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-left: 3px solid rgb(var(--popup-color));
  border-radius: 8px;
  text-shadow: 0 0.4px 0 rgba(0, 0, 0, 0.25);
}


/* =========================
   Popup
========================= */


.glossary-popup {
  --popup-color: var(--callout-information);
}

.glossary-popup[data-type="definition"] {
  --popup-color: var(--callout-information);
}

.glossary-popup[data-type="theorem"] {
  --popup-color: var(--callout-all);
}

.glossary-popup[data-type="fact"] {
  --popup-color: var(--callout-information);
}

.glossary-popup {
  display: none;
  position: absolute;

  top: 1.6em;
  left: 0;

  z-index: 1000;

  color: var(--ink-soft);
  /* ✅ FIX: use rgb() since variable is "R,G,B" */
  /* background-color: color-mix(in srgb, rgb(var(--popup-color)) 25%, white); */
  background-color: color-mix(in srgb,
      rgb(var(--popup-color)) 25%,
      var(--paper-bg));


  /* card styling */
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-left: 3px solid rgb(var(--popup-color));
  border-radius: 8px;

  /*  padding: 0.6em 0.8em; */


  padding: 0;
  /* ✅ changed */
  overflow: hidden;
  /* ✅ ensures rounded corners clip title */


  /* sizing */
  width: max-content;
  max-width: 320px;

  /* text */
  font-size: 0.9em;
  line-height: 1.4;

  /* depth */
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);

  /* animation */
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;

  transition: opacity 0.18s ease, transform 0.18s ease;
}


/* =========================
   Show on hover
========================= */

.glossary-anchor:hover .glossary-popup {
  display: block;
  opacity: 1;
  transform: translateY(5px);
  pointer-events: auto;
}

/* =========================
   Arrow
========================= */

/*
.glossary-popup::before {
  content: "";
  position: absolute;

  top: -6px;
  left: 12px;

  width: 10px;
  height: 10px;

  background-color: rgb(var(--callout-information));

  transform: rotate(45deg);

  border-left: 1px solid rgba(0, 0, 0, 0.15);
  border-top: 1px solid rgba(0, 0, 0, 0.15);
} */

/* =========================
   Math tuning
========================= */

.glossary-popup math {
  font-size: 0.95em;
}

math[display="block"] {
  display: block;
  margin: 0.7em 0;
  padding: 0.01px 0;
  /* tiny padding prevents collapse */
  font-size: 1.10em;
}

/* =========================
   Highlight inside popup
========================= */

.glossary-popup mark {
  background: rgba(255, 230, 120, 0.6);
  color: inherit;   /* ✅ THIS is the fix */
  padding: 0 0.1em;
  border-radius: 2px;
}

/* =========================
   Pinned (floating mode)
========================= */

.glossary-anchor.pinned .glossary-popup {
  display: block;
  opacity: 1;
  transform: none;
  pointer-events: auto;

  position: fixed;
  /* ✅ key for dragging */
  top: 100px;
  left: 100px;

  cursor: grab;
}

/* while dragging */
.glossary-popup.dragging {
  cursor: grabbing;
  transition: none;
}

img {
  max-width: 100%;
  height: auto;
  display: inline-block;
  vertical-align: middle;
}

.callout img {
  margin: 0.5em 0;
  border-radius: 6px;
}


/* =========================
   Popup Title Bar
========================= */

.glossary-popup-title {
  display: flex;
  align-items: center;
  gap: 0.1em;

  padding: 0.45em 0.55em 0.45em 0.4em;

  font-weight: 600;

  /* match callout look */
  background: rgba(var(--popup-color), 0.22);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  color: var(--ink-soft);
}

/* optional icon support (mirrors callout) */
.glossary-popup-title::before {
  content: "";

  width: 1em;
  height: 1em;
  flex-shrink: 0;

  background-image: var(--icon, var(--icon-coffee));
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.9;

  transform: translateY(-1px);
}

/* =========================
   Popup Body
========================= */

.glossary-popup-body {
  display: inline-block;
  padding: 0.5em 0.7em 0.65em 0em;
  margin-left: .4em;
  /* align with title text, not icon */
}

/* =========================
   Restore arrows on details
========================= */

/* Remove default browser marker */
details summary {
  list-style: none;
  cursor: pointer;
}

details summary::-webkit-details-marker {
  display: none;
}

/* Make title layout work with arrow */
details summary.callout-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* key */
}

/* Arrow */
details summary.callout-title::after {
  content: "";

  width: 0.4em;
  height: 0.4em;

  border-right: 2px solid rgb(var(--callout-color));
  border-bottom: 2px solid rgb(var(--callout-color));

  transform-origin: center;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  opacity: 0.7;


  margin-left: auto;
  /* ✅ this is the key fix */
  flex-shrink: 0;
}

/* Open state */
details[open] summary.callout-title::after {
  transform: rotate(135deg);
}

.callout details summary.callout-title::after {
  transform: rotate(45deg);
}

.callout details[open]>summary.callout-title::after {
  transform: rotate(135deg);
}

/* Code blocks + inline code */

pre {
  margin: 0 var(--content-pad);
  padding: 0.25em 1em;
  border-radius: 8px;
  background: var(--code-background);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  overflow-x: auto;
}

code,
pre {
  border-radius: 4px;
  background-color: var(--code-background);
  color: var(--code-normal);
}

code {
  padding: 0.2em 0.4em;
}

pre code {
  padding: 0;
  background: none;
  font-size:small;
}

/* =========================================
   SKIP TO MAIN CONTENT
   ========================================= */

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2000;

  transform: translateY(-120%);
  transition: transform 0.2s ease;

  padding: 0.55em 0.9em;
  border-radius: 0 0 8px 0;

  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;

  /* LIGHT MODE */
  background: #ffffff;
  color: #222;
  border: 2px solid rgba(0, 0, 0, 0.25);

  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* Reveal on keyboard focus */
.skip-link:focus {
  transform: translateY(0);
  outline: none;
}

/* Strong accessible focus ring */
.skip-link:focus-visible {
  outline: 3px solid rgb(var(--callout-information));
  outline-offset: 2px;
}

/* Hover (after focus) */
.skip-link:hover {
  background: #f2f4f8;
}

/* =========================================
   DARK MODE (SYSTEM ONLY)
   ========================================= */

@media (prefers-color-scheme: dark) {
  .skip-link {
    background: var(--background-secondary, #161925);
    color: #e6eaf2;
    border: 2px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
  }


  .content-area {
    box-shadow:
      0 1px 2px rgba(0, 0, 0, 0.5),     /* grounding */
      0 12px 30px rgba(0, 0, 0, 0.6),   /* depth */
      0 0 0 1px rgba(255, 255, 255, 0.04); /* subtle edge highlight */
  }


  .skip-link:hover {
    background: var(--background-tertiary, #202336);
  }

  .skip-link:focus-visible {
    outline: 3px solid rgb(var(--callout-information));
  }

  img {
    filter: brightness(0.85) contrast(1.1);
  }
}


/* =========================================
   MOBILE
   ========================================= */

@media (max-width: 768px) {


html {
  -webkit-text-size-adjust: auto;
}

  header,
  footer {
    padding: 1rem;
  }

  
  .content-area {
    max-width: none;
    margin: 5rem;
    padding: 0.5rem;

    border-radius: 0;
    box-shadow: none;
  }


  .main-content {
    margin: 0;
    padding: 0;
  }

  .callout-title {
    font-size: 1rem;
  }

  .callout-title::before {
    width: 1rem;
    height: 1rem;
  }

  h1 {
    font-size: 2rem;
    line-height: 1.2;
  }

  h2 {
    font-size: 1.6rem;
  }

  h3 {
    font-size: 1.3rem;
  }

  .glossary-popup {
    max-width: min(90vw, 320px);
  }

  pre {
    font-size: 0.9rem;
  }


  .content-area {
    max-width: none !important;
    width: 100% !important;

    margin: 0 !important;
    padding: 0 !important;

    border-radius: 0 !important;
    box-shadow: none !important;
  }

  header,
  footer {
    padding: 0.5rem !important;
  }

}

@media (hover: none) {

  .glossary-popup {
    position: static;
    width: auto;
    max-width: 100%;
    margin-top: 0.5rem;
  }

  .glossary-anchor:hover .glossary-popup {
    transform: none;
  }
}


/* =========================================
   MOBILE MATH
   ========================================= */

@media (max-width: 768px) {

  math[display="block"] {
    display: block;
    overflow-x: auto;

    max-width: 100%;

    padding-bottom: 0.25rem;

    -webkit-overflow-scrolling: touch;
  }

  math[display="block"]::-webkit-scrollbar {
    height: 4px;
  }

  .callout-content {
    overflow-x: auto;
  }
  .callout {
    max-width: 100%;
  }

  math {
    font-size: 0.95em;
  }

  math[display="block"] {
    font-size: 1em;
  }


.callout-title {
  min-height: 44px;
}

math[display="block"] {
  max-width: 100%;
}

.callout-content {
  overflow-x: auto;
}

math {
  font-size: 1.05em;
}

math[display="block"] {
  font-size: 1.15em;
  overflow-x: auto;
}


}

/* The WCAG success criterion for reflow is basically
that users shouldn't have to scroll both horizontally
and vertically to consume content */


@media (max-width: 768px) and (orientation: portrait) {

  .content-area {
    font-size: 1.05rem;
  }

  math {
    font-size: 0.95em;
  }

  math[display="block"] {
    font-size: 0.95em;
    overflow-x: auto;
    max-width: 100%;
  }
}

.callout {
  overflow: visible;
}

.callout-title {
  overflow: hidden;
}

.glossary-popup {
  z-index: 10000;
}

table, th, td {
  border: 1px solid var(--ink-soft);
  border-collapse: collapse;
}

table {
  width: 100%;
  margin: 1em 0;
}

h4 img {
  display: inline;
  margin-right: 0.3em;
  vertical-align: middle;
}

.glossary-popup {
  position: absolute; /* or fixed if that's what you're using */
}

.popup-close {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;

  height: 28px;
  width: 28px;

  padding: 0.2rem 0.45rem;

  border: 1px solid var(--ink-soft);
  border-radius: 999px;

  background: var(--paper-bg);
  color: var(--ink-soft);

  font-weight: bold;
  font-size: 0.9rem;
}

.popup-close:hover {
  background: var(--accent-bg);
  transform: scale(1.08);
}

.popup-close:focus {
  outline: 2px solid var(--accent-bg);
  outline-offset: 2px;
}

.popup-close:active {
  transform: scale(0.95);
}

.popup-close::before {
  content: "";
  position: absolute;
  inset: 50%;
  width: 45px;
  height: 45px;
  transform: translate(-50%, -50%);
}

/* Hides any table header that contains entirely empty cells */
thead:has(> tr > th:empty) { 
  display: none; 
}