/*
 * Tesserae admin design system.
 *
 * Tokens first, colours, spacing, radius, shadow, typography. Swap
 * --t-accent to retint the whole admin (nav, buttons, focus ring,
 * brand mark, slider thumb, switch on-state, link hover).
 *
 * Neutrals follow a zinc-ish 50→900 scale, lightly warm-tinted so the
 * surface layers read as paper-warm rather than clinical grey. The
 * Phosphor icon font is loaded by _base.html, every <i class="ph
 * ph-xxx"> tag inside the admin shell picks up the styles below.
 *
 * Inter (UI) + JetBrains Mono (monospace) are loaded from fonts_core
 * via @font-face below. UI-only family names keep canvas/widget font
 * declarations from overriding this loading policy. With an early preload
 * and optional display, late fonts never replace text already on screen.
 */

@font-face {
  font-family: "Tesserae UI Inter";
  font-style: normal;
  font-weight: 400;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/inter/400.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI Inter";
  font-style: normal;
  font-weight: 500;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/inter/400.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI Inter";
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/inter/700.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI Inter";
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/inter/700.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI Inter";
  font-style: normal;
  font-weight: 800;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/inter/800.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI JetBrains Mono";
  font-style: normal;
  font-weight: 400;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/jetbrains-mono/400.woff2") format("woff2");
}
@font-face {
  font-family: "Tesserae UI JetBrains Mono";
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url("../../plugins/fonts_core/static/jetbrains-mono/700.woff2") format("woff2");
}

:root {
  /* Accent, deep teal that reads as both serious and warm. */
  --t-accent: #0d8c7e;
  --t-accent-hover: #0a6f63;
  --t-accent-soft: #e6f3f1;
  --t-accent-fg: #ffffff;
  --t-accent-ink: #064a42; /* darker variant for type on accent-soft */

  /* Neutral scale, warm-zinc; values are ~2% warmer than pure zinc
     so surfaces read as paper rather than clinical. */
  --t-50: #fafaf9;
  --t-100: #f4f4f2;
  --t-200: #e6e5e1;
  --t-300: #d4d3cd;
  --t-400: #a1a09a;
  --t-500: #71706c;
  --t-600: #52524f;
  --t-700: #3f3f3d;
  --t-800: #27272a;
  --t-900: #18181b;

  /* Surface layers, three depths so cards lift above the page bg
     without harsh borders. Background is the deepest tint, surfaces
     step up toward pure white. */
  --t-bg: #f1f0ec;
  --t-surface: #ffffff;
  --t-surface-soft: var(--t-50);
  --t-surface-sunk: var(--t-100);
  --t-surface-raised: #ffffff;
  --t-fg: var(--t-900);
  --t-fg-soft: var(--t-600);
  --t-muted: var(--t-500);
  --t-border: var(--t-200);
  --t-border-strong: var(--t-300);

  /* Categorical chart series (v0.307). Three hues plus a neutral for
     "other", validated for colour-blind separation against the light and
     dark chart surfaces, and kept clear of the status colours below so a
     series can never read as "this one is failing". */
  --t-chart-1: #2a78d6;
  --t-chart-2: #eb6834;
  --t-chart-3: #0d8c7e;
  --t-chart-other: #8d8c86;

  --t-danger: #dc2626;
  --t-danger-bg: #fef2f2;
  --t-warn: #d97706;
  --t-warn-bg: #fffbeb;
  --t-ok: #16a34a;
  --t-ok-bg: #f0fdf4;

  /* v0.56 admin-uplift tokens. Spec values from the
     ``design_handoff_ui_uplift`` README; used by the .dx-* admin
     surface (section cards, inset rows, status pills, code blocks).
     Dark-mode equivalents live in the override block below. */
  --t-inset: #faf9f6;
  --t-inset-border: #ebeae4;
  --t-accent-tint: #dcefe8;
  --t-pill-ok-bg: #e7f3ee;
  --t-pill-ok-fg: #15846a;
  --t-pill-ok-border: #bfe3d4;
  --t-pill-warn-bg: #fcf6ea;
  --t-pill-warn-fg: #a06a1e;
  --t-pill-warn-border: #ecdcbc;
  --t-pill-danger-bg: #fbeeec;
  --t-pill-danger-fg: #c0392b;
  --t-pill-danger-border: #e7c6c1;
  --t-pill-neutral-bg: #eceae4;
  --t-pill-neutral-fg: #6a6a63;
  --t-code-bg: #eae7df;
  --t-code-border: #dcd8cd;
  --t-code-fg: #4a463e;
  --t-code-key: #0f7a62;
  --t-code-str: #a35a2c;
  --t-code-num: #2f6f9e;
  --t-code-kw: #7d5bc6;
  --t-code-punct: #9a9a93;

  /* Typography, Inter for UI, JetBrains Mono for code / IDs /
     dimensions. Both prefer the bundled fonts_core woff2s and fall
     back to native system stacks if unavailable at initial layout. */
  --t-font:
    "Tesserae UI Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --t-font-mono:
    "Tesserae UI JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  /* Inter polish: single-storey a (cv11), tabular numbers (cv01),
     stylistic set 1. Browsers that don't support these just ignore. */
  --t-font-features: "cv11", "ss01", "cv01";

  --t-size-xs: 11px;
  --t-size-sm: 12px;
  --t-size-md: 13px;
  --t-size-base: 14px;
  --t-size-lg: 16px;
  --t-size-xl: 18px;
  --t-size-2xl: 22px;
  --t-size-3xl: 28px;
  --t-size-4xl: 36px;

  /* Spacing, 4px base, 8px stride */
  --t-space-1: 4px;
  --t-space-2: 8px;
  --t-space-3: 12px;
  --t-space-4: 16px;
  --t-space-5: 20px;
  --t-space-6: 24px;
  --t-space-7: 32px;
  --t-space-8: 48px;
  --t-space-9: 64px;

  /* Radius */
  --t-radius-sm: 6px;
  --t-radius: 10px;
  --t-radius-md: 10px;
  --t-radius-lg: 16px;
  --t-radius-xl: 20px;
  --t-radius-pill: 999px;

  /* Shadow scale, softer / layered so cards feel like paper on paper.
     Each step adds depth + a slightly longer cast. */
  --t-shadow-xs: 0 1px 0 rgba(16, 12, 8, 0.04);
  --t-shadow-sm: 0 1px 2px rgba(16, 12, 8, 0.05), 0 1px 1px rgba(16, 12, 8, 0.03);
  --t-shadow: 0 1px 2px rgba(16, 12, 8, 0.04), 0 2px 6px rgba(16, 12, 8, 0.05);
  --t-shadow-md: 0 1px 2px rgba(16, 12, 8, 0.04), 0 8px 20px rgba(16, 12, 8, 0.07);
  --t-shadow-lg: 0 4px 12px rgba(16, 12, 8, 0.06), 0 16px 40px rgba(16, 12, 8, 0.1);
  --t-shadow-xl: 0 8px 24px rgba(16, 12, 8, 0.1), 0 32px 80px rgba(16, 12, 8, 0.14);
  /* Inset highlight used on raised buttons + preview frames so they
     read as "lit" rather than flat fills. */
  --t-shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.6), inset 0 0 0 1px rgba(16, 12, 8, 0.03);
  --t-ring: 0 0 0 3px color-mix(in oklab, var(--t-accent) 25%, transparent);
  --t-ring-soft: 0 0 0 4px color-mix(in oklab, var(--t-accent) 14%, transparent);

  /* Motion, two ease curves: snappy for press/click, spring for
     hover/lift/state changes that should feel buoyant. */
  --t-ease-snappy: cubic-bezier(0.16, 1, 0.3, 1);
  --t-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-trans: 150ms var(--t-ease-snappy);
  --t-trans-fast: 80ms ease;
  --t-trans-slow: 280ms var(--t-ease-snappy);
  color-scheme: light;
}

/* Dark theme, toggled via <html data-theme="dark">. Slate-leaning
   neutrals (cool, not pure black) so the teal accent reads as warm
   contrast rather than competing with a charcoal bg. */
:root[data-theme="dark"] {
  color-scheme: dark;

  --t-bg: #0e1015;
  --t-surface: #181b22;
  --t-surface-soft: #1f232b;
  --t-surface-sunk: #13161c;
  --t-surface-raised: #1d2129;
  --t-fg: #e7e9ee;
  --t-fg-soft: #b6bcc7;
  --t-muted: #8b93a1;
  --t-border: #2a2f38;
  --t-border-strong: #3a4150;

  --t-accent: #2dd4bf;
  --t-accent-hover: #14b8a6;
  --t-accent-soft: color-mix(in oklab, #2dd4bf 18%, #181b21);
  --t-accent-fg: #04241f;
  --t-accent-ink: #99f6e4;

  /* Same three hues, stepped for the dark surface rather than flipped. */
  --t-chart-1: #3987e5;
  --t-chart-2: #d95926;
  --t-chart-3: #16a394;
  --t-chart-other: #7b8290;

  --t-danger: #f87171;
  --t-danger-bg: color-mix(in oklab, #f87171 18%, #181b21);
  --t-warn: #fbbf24;
  --t-warn-bg: color-mix(in oklab, #fbbf24 18%, #181b21);
  --t-ok: #4ade80;
  --t-ok-bg: color-mix(in oklab, #4ade80 18%, #181b21);

  /* v0.56 admin-uplift dark-mode overrides. */
  --t-inset: #1f232b;
  --t-inset-border: #2a2f38;
  --t-accent-tint: #143029;
  --t-pill-ok-bg: color-mix(in oklab, #2dd4bf 18%, #181b21);
  --t-pill-ok-fg: #5eead4;
  --t-pill-ok-border: color-mix(in oklab, #2dd4bf 30%, #181b21);
  --t-pill-warn-bg: color-mix(in oklab, #fbbf24 16%, #181b21);
  --t-pill-warn-fg: #f3c97e;
  --t-pill-warn-border: color-mix(in oklab, #fbbf24 30%, #181b21);
  --t-pill-danger-bg: color-mix(in oklab, #f87171 18%, #181b21);
  --t-pill-danger-fg: #f87171;
  --t-pill-danger-border: color-mix(in oklab, #f87171 30%, #181b21);
  --t-pill-neutral-bg: #1f232b;
  --t-pill-neutral-fg: #b6bcc7;
  --t-code-bg: #11141a;
  --t-code-border: #2a2f38;
  --t-code-fg: #c8cdd6;
  --t-code-key: #5eead4;
  --t-code-str: #e0a45c;
  --t-code-num: #7fb4e8;
  --t-code-kw: #c3a6f0;
  --t-code-punct: #8b93a1;

  --t-shadow-xs: 0 1px 0 rgba(0, 0, 0, 0.4);
  --t-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 1px rgba(0, 0, 0, 0.2);
  --t-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 6px rgba(0, 0, 0, 0.35);
  --t-shadow-md: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.45);
  --t-shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4), 0 16px 40px rgba(0, 0, 0, 0.55);
  --t-shadow-xl: 0 8px 28px rgba(0, 0, 0, 0.55), 0 32px 80px rgba(0, 0, 0, 0.65);
  --t-shadow-inset:
    inset 0 1px 0 rgba(255, 255, 255, 0.04), inset 0 0 0 1px rgba(255, 255, 255, 0.02);
  --t-ring: 0 0 0 3px color-mix(in oklab, var(--t-accent) 35%, transparent);
  --t-ring-soft: 0 0 0 4px color-mix(in oklab, var(--t-accent) 22%, transparent);
}

/* Dev-mode tell: a `tesserae --dev` server retints the admin accent
   reddish-orange so it's obvious you're not on your production instance.
   Set on <body> (added by _base.html when config.DEV_MODE) so it wins
   over the :root + dark-theme accent for everything inside. */
body.dev-mode {
  --t-accent: #e0542a;
  --t-accent-hover: #c0431d;
  --t-accent-soft: #fbe7df;
  --t-accent-fg: #ffffff;
  --t-accent-ink: #7c2b12;
}
:root[data-theme="dark"] body.dev-mode {
  --t-accent: #ff7a4d;
  --t-accent-hover: #ff9166;
  --t-accent-soft: color-mix(in oklab, #ff7a4d 18%, #181b21);
  --t-accent-fg: #2a0f06;
  --t-accent-ink: #ffd9c9;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
/* Belt-and-braces guard against any inner element forcing a
   horizontal scrollbar on the page itself (e.g. a wide condition
   picker row, a code block with no wrap, an embedded preview).
   Individual scrollable surfaces (.dx-code, .preview-frame, the
   composer canvas) handle their own overflow inside their box.
   ``overflow-x: clip`` is used instead of ``hidden`` because
   ``hidden`` on html/body establishes a new scroll container and
   silently breaks ``position: sticky`` everywhere on the page
   (e.g. the editor's live preview, the sticky editor header).
   ``clip`` gives the same no-scrollbar guarantee without that
   side-effect. ``hidden`` is kept as a cascade fallback for
   browsers that don't understand ``clip`` (pre-Safari 16, pre-
   Chrome 90, pre-Firefox 81); they get the old behaviour. */
html,
body {
  overflow-x: hidden;
  overflow-x: clip;
  max-width: 100%;
}

/* Screen-reader-only utility. Visually hidden, still announced.
   Used for the play-step buttons inside the rotation step rows
   (the icon carries the visible meaning; the span carries the
   indexed label so a screen reader says "Play step 1 now"). */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body.admin {
  background: var(--t-bg);
  color: var(--t-fg);
  font: 400 var(--t-size-base)/1.5 var(--t-font);
  font-feature-settings: var(--t-font-features);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Faint ambient gradient + grid noise on the page bg so it doesn't
     read as a single flat fill. Two stacked radial gradients (one warm
     near the top, one cooler near the bottom) and a 24px square grid
     drawn with two thin lines of the border colour. The grid is at
     0.4% opacity, invisible up close, gives the page faint texture
     when you scan past it. */
  background-image:
    radial-gradient(
      ellipse 800px 400px at 50% -200px,
      color-mix(in oklab, var(--t-accent) 5%, transparent),
      transparent
    ),
    linear-gradient(to right, rgba(16, 12, 8, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(16, 12, 8, 0.015) 1px, transparent 1px);
  background-size:
    auto,
    24px 24px,
    24px 24px;
  background-attachment: fixed;
}
:root[data-theme="dark"] body.admin {
  background-image:
    radial-gradient(
      ellipse 800px 400px at 50% -200px,
      color-mix(in oklab, var(--t-accent) 10%, transparent),
      transparent
    ),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size:
    auto,
    24px 24px,
    24px 24px;
  background-attachment: fixed;
}

/* Sharper headings; numerals tabular so dimensions / counts don't
   jitter as values change. */
h1,
h2,
h3,
h4 {
  font-feature-settings: var(--t-font-features), "ss03";
}
code,
pre,
.mono,
.meta dd,
.field-id,
[data-mono] {
  font-family: var(--t-font-mono);
  font-feature-settings: "calt", "ss01";
  font-variant-numeric: tabular-nums;
}

a {
  color: var(--t-accent);
  text-decoration: none;
}
a:hover {
  color: var(--t-accent-hover);
}

/* ----- Server mark ----------------------------------------------------
   The self-hosted mark (templates/_brand_mark.html): ink tile, red top
   right, paper bottom left, in both designs and both themes. The tile
   never follows the theme; a dark theme only adds a 1 px light hairline
   inside the tile edge. A server colour (#350) replaces --p-logo-a. */

/* Sub-heading colour: the theme accent, drawn toward the text colour so it keeps
   4.5:1 contrast at small sizes in every design and theme. */
:root {
  --t-subhead: color-mix(in oklab, var(--t-accent) 78%, var(--t-fg));
}

:root {
  --p-logo-tile: #1c1b19;
  --p-logo-a: #d0493c;
  --p-logo-b: #fffdf8;
  --p-logo-edge: #ede9df;
}
.brand-edge {
  display: none;
}
:root[data-theme="dark"] .brand-edge {
  display: inline;
}

/* ----- Icons (Phosphor)----------------------------------------------
   Inline icons inherit colour + sit on the baseline. Standalone icons
   (in card-head, empty states) bump up via .ph-lg / .ph-2x classes. */

.ph,
.ph-fill,
.ph-bold,
.ph-duotone,
.ph-light,
.ph-thin {
  /* Reserve a glyph's final square before the icon font arrives, so a
     late icon cannot push adjacent labels sideways. */
  display: inline-block;
  width: 1em;
  vertical-align: -0.125em;
  font-size: 1.05em;
  line-height: 1;
}
.ph.is-lg {
  font-size: 1.5em;
}
.ph.is-xl {
  font-size: 2em;
}
.ph.is-2x {
  font-size: 32px;
}
.ph.is-3x {
  font-size: 48px;
}
.ph.is-accent {
  color: var(--t-accent);
}
.ph.is-muted {
  color: var(--t-muted);
}
.ph.is-soft {
  color: var(--t-fg-soft);
}
.ph.is-ok {
  color: var(--t-ok);
}
.ph.is-warn {
  color: var(--t-warn);
}
.ph.is-danger {
  color: var(--t-danger);
}

.icon-box {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--t-radius-sm);
  background: var(--t-accent-soft);
  color: var(--t-accent);
  font-size: 18px;
  flex-shrink: 0;
}
.icon-box.is-sm {
  width: 24px;
  height: 24px;
  font-size: 14px;
}
.icon-box.is-lg {
  width: 40px;
  height: 40px;
  font-size: 22px;
}
.icon-box.is-muted {
  background: var(--t-surface-sunk);
  color: var(--t-fg-soft);
}

/* -- info-pop: click-to-open contextual help icon --------------------
 *
 * Replaces what used to be paragraphs of always-visible field-help and
 * card-blurb text. The icon sits inline next to a label or heading and
 * pops a small panel below the icon when clicked. Click-away or Escape
 * closes; only one popover open at a time. JS in static/info-pop.js. */
.info-pop-wrap {
  display: inline-block;
  position: relative;
  vertical-align: baseline;
  line-height: 0;
  margin-left: 4px;
}
.info-pop {
  appearance: none;
  background: transparent;
  border: 0;
  padding: 1px;
  margin: 0;
  font-size: 13px;
  line-height: 1;
  color: var(--t-fg-soft);
  cursor: pointer;
  border-radius: 999px;
  transition:
    color 80ms ease,
    background 80ms ease;
}
.info-pop:hover {
  color: var(--t-accent);
}
.info-pop:focus-visible {
  outline: 2px solid var(--t-accent);
  outline-offset: 2px;
}
.info-pop[aria-expanded="true"] {
  color: var(--t-accent);
  background: var(--t-accent-soft);
}
.info-pop .ph {
  font-size: inherit;
}
.info-pop-content {
  position: absolute;
  z-index: 50;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  max-width: min(360px, calc(100vw - 32px));
  padding: 10px 12px;
  background: var(--t-surface);
  color: var(--t-fg);
  border: 1px solid var(--t-border);
  border-radius: var(--t-radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  font-size: var(--t-size-sm);
  line-height: 1.45;
  white-space: normal;
  display: block;
}
.info-pop-content[hidden] {
  display: none;
}
/* JS adds .is-flipped when the popover would overflow the right edge so
 * it anchors to the right of the icon instead of the left. */
.info-pop-content.is-flipped {
  left: auto;
  right: 0;
}

/* App footer, version + GitHub link, subtle link-only style.
   Sits below every page's <main> so it's always reachable but never
   demands attention. Only the version text is the link; no surrounding
   chrome. */
.app-footer {
  padding: var(--t-space-6) var(--t-space-4) var(--t-space-7);
  text-align: center;
  font-size: var(--t-size-sm);
  color: var(--t-fg-soft, var(--t-fg));
  opacity: 0.6;
  transition: opacity 140ms ease-out;
}

/* Small caret used inside <summary>/<details> toggles for dropdown
   navs, plugin pickers, and disclosure panels. Replaces a handful of
   inline ``style="font-size:12px; opacity:.6"`` attrs that drifted
   between templates. Use as a modifier on a Phosphor caret-down icon:
   ``<i class="ph ph-caret-down caret-soft">``. */
.caret-soft {
  font-size: var(--t-size-sm);
  opacity: 0.6;
}
.app-footer:hover {
  opacity: 0.95;
}
.app-footer a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
  padding-bottom: 1px;
}
.app-footer a:hover {
  color: var(--t-fg);
  border-bottom-style: solid;
}
.app-footer a .ph {
  font-size: 0.95em;
  vertical-align: -0.08em;
  margin-right: 2px;
  border: 0;
}
.app-footer a:last-child .ph {
  margin-right: 0;
  margin-left: 2px;
}
.app-footer-sep {
  margin: 0 var(--t-space-2);
  opacity: 0.5;
  border: 0;
}