/* ==========================================================================
   ids.css — IDS lean classless CSS (ADR-0076)
   --------------------------------------------------------------------------
   A small, standalone, reusable stylesheet for server-rendered HTML pages,
   built on the ImZero2 Design System (IDS) tokens. Drop one <link> (or inline
   it) and semantic HTML "just works" in the IDS dark look — no classes needed.

   Layers:
     1. Colour tokens          — @import ids-palette.css (generated; DO NOT EDIT)
     2. Scalar tokens          — spacing / radius / stroke / type / motion
     3. Classless element base — bare HTML styled directly
     4. Obsidian-markdown      — every class the obsidian renderer emits
                                 (public/semistructured/markdown/obsidian), so
                                 this file is a drop-in replacement for that
                                 package's static/obsidian.css.

   Hand-authored (unlike ids-palette.css). The scalar tokens mirror the Go/Rust
   constants in styletokens (spacing.go, rounding.go, stroke.go, typography.go,
   motion.go) at Standard density. Fidelity note: this shares IDS *tokens and
   feel*, it does not pixel-replicate egui's immediate-mode widgets.
   ========================================================================== */

@import "ids-palette.css";

/* --------------------------------------------------------------------------
   2. Scalar tokens (Standard density). Mirror of styletokens; see header.
   -------------------------------------------------------------------------- */
:root {
  /* Spacing ladder — styletokens.PxTable Standard column, the 2 px grid */
  --ids-space-0: 2px;
  --ids-space-1: 4px;
  --ids-space-2: 6px;
  --ids-space-3: 8px;
  --ids-space-4: 12px;
  --ids-space-5: 16px;
  --ids-space-6: 24px;
  --ids-space-7: 32px;

  /* Corner radius — RoundingNone/Sm/Md/Lg */
  --ids-radius-none: 0;
  --ids-radius-sm: 2px;
  --ids-radius-md: 4px;
  --ids-radius-lg: 6px;

  /* Border / stroke widths — StrokeHair/Regular/Strong */
  --ids-border-hair: 1px;
  --ids-border-regular: 1.5px;
  --ids-border-strong: 2px;

  /* Type scale — DisplayPt..MicroPt as rem (logical points ≈ px at a 16px root) */
  --ids-text-display: 1.375rem; /* 22 */
  --ids-text-heading: 1rem;     /* 16 */
  --ids-text-body: 0.8125rem;   /* 13 */
  --ids-text-caption: 0.6875rem;/* 11 */
  --ids-text-micro: 0.5625rem;  /*  9 */
  --ids-line: 1.6;
  --ids-line-tight: 1.3;

  /* Motion — MotionQuick/Standard/Slow */
  --ids-motion-quick: 80ms;
  --ids-motion-standard: 160ms;
  --ids-motion-slow: 320ms;

  /* Font stacks — system by default so the sheet is asset-free and standalone.
     IDS web-fonts (Iosevka Aile / IDS Mono / Phosphor) are an opt-in add-on. */
  --ids-font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ids-font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", "Fira Code", Consolas, "Liberation Mono", monospace;
}

/* --------------------------------------------------------------------------
   3. Classless element base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  color-scheme: dark; /* native scrollbars, form controls, spinners render dark */
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin-block: 2em;
  margin-inline: auto;
  max-width: 50em;
  padding-inline: var(--ids-space-5);
  background: var(--ids-bg-panel);
  color: var(--ids-text-primary);
  font-family: var(--ids-font-sans);
  font-size: var(--ids-text-body);
  line-height: var(--ids-line);
  -webkit-font-smoothing: antialiased;
}

/* Headings — markdown's six levels extend the IDS UI type scale (display is
   its top step); h3 lands on heading, the rest interpolate around it. */
h1, h2, h3, h4, h5, h6 {
  margin: 1.4em 0 0.6em;
  line-height: var(--ids-line-tight);
  font-weight: 600;
  color: var(--ids-text-extreme);
}
h1 { font-size: var(--ids-text-display); }
h2 { font-size: 1.2rem; }
h3 { font-size: var(--ids-text-heading); }
h4 { font-size: 0.9rem; }
h5 { font-size: var(--ids-text-body); }
h6 {
  font-size: var(--ids-text-caption);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ids-text-secondary);
}

p { margin: 0.75em 0; }

a {
  color: var(--ids-accent);
  text-decoration: none;
  transition: color var(--ids-motion-quick) ease;
}
a:hover { text-decoration: underline; }

strong, b { color: var(--ids-text-extreme); font-weight: 600; }
em, i { font-style: italic; }
small { font-size: var(--ids-text-caption); color: var(--ids-text-secondary); }

ul, ol { margin: 0.75em 0; padding-left: 1.5em; }
li { margin: 0.2em 0; }

blockquote {
  margin: 1em 0;
  padding: 0.2em 0 0.2em 1em;
  border-left: var(--ids-border-strong) solid var(--ids-border-default);
  color: var(--ids-text-secondary);
}

hr {
  margin: 1.5em 0;
  border: none;
  border-top: var(--ids-border-hair) solid var(--ids-border-faint);
}

mark {
  background: var(--ids-warning-subtle);
  color: var(--ids-text-primary);
  padding: 0.05em 0.2em;
  border-radius: var(--ids-radius-sm);
}

del { color: var(--ids-text-disabled); text-decoration: line-through; }

::selection { background: var(--ids-accent-subtle); color: var(--ids-text-extreme); }

:focus-visible {
  outline: var(--ids-border-strong) solid var(--ids-accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   4. Code
   -------------------------------------------------------------------------- */
code, kbd, samp {
  font-family: var(--ids-font-mono);
  font-size: 0.9em;
}
:not(pre) > code, kbd {
  background: var(--ids-bg-surface);
  padding: 0.12em 0.35em;
  border-radius: var(--ids-radius-sm);
}
kbd { border: var(--ids-border-hair) solid var(--ids-border-faint); }

pre {
  margin: 1em 0;
  padding: var(--ids-space-4);
  background: var(--ids-bg-surface);
  border: var(--ids-border-hair) solid var(--ids-border-faint);
  border-radius: var(--ids-radius-md);
  overflow-x: auto;
  line-height: 1.45;
}
pre code { background: none; padding: 0; font-size: 0.85rem; }

/* --------------------------------------------------------------------------
   5. Media
   -------------------------------------------------------------------------- */
img, svg, video { max-width: 100%; height: auto; }

/* --------------------------------------------------------------------------
   6. Tables (GFM)
   -------------------------------------------------------------------------- */
table {
  border-collapse: collapse;
  margin: 1em 0;
  width: auto;
  min-width: 40%;
}
th, td {
  border: var(--ids-border-hair) solid var(--ids-border-faint);
  padding: var(--ids-space-1) var(--ids-space-3);
  text-align: left;
}
th {
  background: var(--ids-bg-surface);
  font-weight: 600;
  color: var(--ids-text-extreme);
}
tbody tr:nth-child(even) td { background: var(--ids-bg-faint); }
tbody tr:hover td { background: var(--ids-bg-surface); }

/* --------------------------------------------------------------------------
   7. Forms & controls
   -------------------------------------------------------------------------- */
button, input, select, textarea {
  font: inherit;
  color: var(--ids-text-primary);
  background: var(--ids-bg-surface);
  border: var(--ids-border-regular) solid var(--ids-border-default);
  border-radius: var(--ids-radius-sm);
  padding: var(--ids-space-1) var(--ids-space-3);
  transition: border-color var(--ids-motion-quick) ease,
              background var(--ids-motion-quick) ease;
}
button { cursor: pointer; }
button:hover, input:hover, select:hover, textarea:hover { border-color: var(--ids-border-default); }
button:hover { border-color: var(--ids-accent); }
button:active { background: var(--ids-bg-faint); }
:disabled { color: var(--ids-text-disabled); cursor: not-allowed; opacity: 0.7; }
::placeholder { color: var(--ids-text-disabled); }

/* ==========================================================================
   8. Obsidian-markdown coverage
   Mirrors every selector in the obsidian renderer's static/obsidian.css, so an
   obsidian-rendered page styled by ids.css needs nothing else. Class set:
   wikilink(-broken) · embed-image · embed-note(.embed-broken) · tag · callout
   + callout-<type> · callout-title · callout-content · frontmatter · dl/dt/dd ·
   contains-task-list · task-list-item.
   ========================================================================== */

/* Wikilinks */
.wikilink {
  color: var(--ids-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ids-motion-quick);
}
.wikilink:hover { border-bottom-color: var(--ids-accent); }
.wikilink.wikilink-broken {
  color: var(--ids-error);
  border-bottom: 1px dashed var(--ids-error);
  opacity: 0.85;
}
.wikilink.wikilink-broken:hover { opacity: 1; }

/* Embeds */
.embed-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--ids-radius-md);
  margin: 0.5em 0;
}
.embed-image.embed-broken { outline: 1px dashed var(--ids-error); opacity: 0.7; }
.embed-note {
  margin: 0.75em 0;
  padding: var(--ids-space-2) var(--ids-space-4);
  background: var(--ids-bg-surface);
  border: var(--ids-border-hair) solid var(--ids-border-faint);
  border-left: 3px solid var(--ids-accent);
  border-radius: var(--ids-radius-md);
  color: var(--ids-text-secondary);
  font-size: 0.9em;
}
.embed-note.embed-broken { border-left-color: var(--ids-error); opacity: 0.7; }

/* Tags */
.tag {
  display: inline-block;
  background: var(--ids-bg-surface);
  color: var(--ids-text-secondary);
  font-size: 0.85em;
  padding: 0.1em 0.5em;
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--ids-motion-quick);
}
.tag:hover { background: var(--ids-bg-faint); }
a.tag { cursor: pointer; }

/* Callouts */
.callout {
  margin: 1em 0;
  background: var(--ids-bg-surface);
  border-radius: var(--ids-radius-md);
  border-left: 4px solid var(--ids-border-default);
  overflow: hidden;
}
.callout-title {
  padding: var(--ids-space-2) var(--ids-space-4);
  font-weight: 600;
  font-size: 0.95em;
  user-select: none;
}
.callout-content { padding: 0 var(--ids-space-4) var(--ids-space-2); }
.callout-content > :first-child { margin-top: 0; }
.callout-content > :last-child { margin-bottom: 0; }

/* Foldable callouts (<details><summary class="callout-title">) */
.callout details > summary.callout-title { cursor: pointer; list-style: none; }
.callout details > summary.callout-title::before {
  content: "\25B8"; /* ▸ */
  display: inline-block;
  margin-right: 0.4em;
  transition: transform var(--ids-motion-quick);
}
.callout details[open] > summary.callout-title::before { transform: rotate(90deg); }
.callout details > summary.callout-title::-webkit-details-marker { display: none; }

/* Callout type accents — obsidian's callout vocabulary mapped to IDS tones */
.callout-note, .callout-info, .callout-todo,
.callout-abstract, .callout-summary, .callout-tldr { --ids-callout-accent: var(--ids-info); }
.callout-tip, .callout-hint,
.callout-success, .callout-check, .callout-done { --ids-callout-accent: var(--ids-success); }
.callout-question, .callout-help, .callout-faq,
.callout-warning, .callout-caution, .callout-attention { --ids-callout-accent: var(--ids-warning); }
.callout-failure, .callout-fail, .callout-missing,
.callout-danger, .callout-error, .callout-bug { --ids-callout-accent: var(--ids-error); }
.callout-example { --ids-callout-accent: var(--ids-accent); }
.callout-quote, .callout-cite { --ids-callout-accent: var(--ids-neutral); }

.callout[class*="callout-"] { border-left-color: var(--ids-callout-accent, var(--ids-border-default)); }
.callout[class*="callout-"] .callout-title { color: var(--ids-callout-accent, var(--ids-text-extreme)); }

/* Frontmatter properties panel (<details class="frontmatter">) */
.frontmatter {
  margin-bottom: 1.5em;
  background: var(--ids-bg-surface);
  border: var(--ids-border-hair) solid var(--ids-border-faint);
  border-radius: var(--ids-radius-md);
  font-size: 0.9em;
}
.frontmatter > summary {
  padding: var(--ids-space-2) var(--ids-space-4);
  font-weight: 600;
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ids-text-secondary);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.frontmatter > summary::before {
  content: "\25B8"; /* ▸ */
  display: inline-block;
  margin-right: 0.4em;
  transition: transform var(--ids-motion-quick);
}
.frontmatter[open] > summary::before { transform: rotate(90deg); }
.frontmatter > summary::-webkit-details-marker { display: none; }
.frontmatter dl {
  margin: 0;
  padding: 0 var(--ids-space-4) var(--ids-space-2);
  display: grid;
  grid-template-columns: minmax(8em, auto) 1fr;
  gap: 0.25em 1em;
  align-items: baseline;
}
.frontmatter dt { color: var(--ids-text-secondary); font-weight: 500; }
.frontmatter dd { margin: 0; }
.frontmatter dd dl { padding: 0; margin: 0.2em 0; }
.frontmatter dd ul { margin: 0; padding-left: 1.2em; list-style: disc; }
.frontmatter dd li { margin: 0.1em 0; }

/* Task lists (GFM) */
.contains-task-list { list-style: none; padding-left: 0.4em; }
.task-list-item { position: relative; padding-left: 1.6em; }
.task-list-item input[type="checkbox"] {
  position: absolute;
  left: 0;
  top: 0.3em;
  accent-color: var(--ids-accent);
}

/* --------------------------------------------------------------------------
   9. Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
  }
}