rustio-admin 0.1.1

Django Admin, but for Rust. A small, focused admin framework.
Documentation 
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/* rustio-admin — single hand-written stylesheet.
 *
 * Six-variable theme; project overrides via Admin::theme(...) and
 * its `_theme.html` partial that injects `:root { --rio-* … }`.
 * Mobile-first, three breakpoints. Dark palette flips via the
 * combination of `prefers-color-scheme: dark` and an explicit
 * `data-rio-theme="dark"` attribute on `<html>`.
 *
 * Self-hosted fonts (SIL OFL-1.1, see /static/fonts/LICENSE.txt):
 *
 *   Latin / UI    — Geist Variable (wght 100..900)
 *   Code          — Geist Mono Variable (wght 100..900)
 *   Arabic UI     — Tajawal 400 / 500 / 700
 *                   (compact surfaces: buttons, sidebar, tables, badges)
 *   Arabic body   — Noto Naskh Arabic Variable (wght 400..700)
 *                   (paragraphs, descriptions, long-form copy)
 *
 * The font binaries are baked into the rustio-admin binary; no CDN
 * round-trip, no FOUT, no GDPR/tracking surface. Browsers select
 * which Arabic face to load via `unicode-range` + the per-element
 * `font-family` resolution rules in §1.b below.
 */

/* ============================================================
 * 0. @font-face — self-hosted, OFL-1.1
 * ============================================================ */

/* Geist (variable Latin) ------------------------------------- */
@font-face {
  font-family: "Geist";
  src: url("/static/fonts/Geist-Variable.woff2") format("woff2-variations"),
       url("/static/fonts/Geist-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Geist Mono";
  src: url("/static/fonts/GeistMono-Variable.woff2") format("woff2-variations"),
       url("/static/fonts/GeistMono-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* Tajawal (Arabic UI: compact surfaces) ---------------------- */
/* Three static weights — Tajawal has no public variable axis. The
 * unicode-range filters fetches to Arabic codepoints only. */
@font-face {
  font-family: "Tajawal";
  src: url("/static/fonts/Tajawal-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+08A0-08FF, U+FB50-FDFF, U+FE70-FEFF, U+200C-200E, U+2010-2011, U+204F, U+2E41;
}
@font-face {
  font-family: "Tajawal";
  src: url("/static/fonts/Tajawal-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+08A0-08FF, U+FB50-FDFF, U+FE70-FEFF, U+200C-200E, U+2010-2011, U+204F, U+2E41;
}
@font-face {
  font-family: "Tajawal";
  src: url("/static/fonts/Tajawal-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+08A0-08FF, U+FB50-FDFF, U+FE70-FEFF, U+200C-200E, U+2010-2011, U+204F, U+2E41;
}

/* Noto Naskh Arabic (Arabic paragraph body) ------------------ */
@font-face {
  font-family: "Noto Naskh Arabic";
  src: url("/static/fonts/NotoNaskhArabic-Variable.woff2") format("woff2-variations"),
       url("/static/fonts/NotoNaskhArabic-Variable.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+08A0-08FF, U+FB50-FDFF, U+FE70-FEFF, U+200C-200E, U+2010-2011, U+204F, U+2E41;
}

/* ============================================================
 * 1.a. Color / spacing tokens
 * ============================================================ */

:root {
  /* The six theme tokens (also injected by _theme.html so a project
   * override survives the cascade). Defaults match AdminTheme::default().
   *
   * Brand accent — `#A0341A` (deep crimson, "Andalusian red"). Reserved
   * for affordances: primary buttons, focus rings, active state, links,
   * brand emblem. Never flood-filled across page chrome — surfaces stay
   * neutral so the accent retains its weight as a call-to-action. */
  --rio-accent: #A0341A;
  --rio-accent-rgb: 160 52 26;
  --rio-bg: #ebeef4;            /* deeper page bg — surfaces now visibly pop */
  --rio-surface: #ffffff;
  --rio-surface-2: #f5f7fb;     /* secondary surface (table head, hovered row) */
  --rio-text: #0a0e1a;          /* near-black body text */
  --rio-text-muted: #3d4452;    /* darker — strong reading contrast on surface */
  --rio-text-subtle: #5e6577;   /* metadata + breadcrumbs */
  --rio-border: #cdd3df;        /* darker for visible separation against bg */
  --rio-border-strong: #b8c0cf; /* card outlines, table dividers */

  /* Derived tokens — colors carry meaning across the UI. Info-bg now
   * reads as a soft warm wash instead of cobalt so it harmonises with
   * the crimson accent rather than fighting it. */
  --rio-success: #15803d;
  --rio-warning: #b45309;
  --rio-danger: #b91c1c;
  --rio-success-bg: #ecfdf5;
  --rio-warning-bg: #fffbeb;
  --rio-danger-bg: #fef2f2;
  --rio-info-bg: #fdf3ef;

  /* Spacing scale: 4 / 8 / 12 / 16 / 24 / 32 / 48 px. */
  --rio-s1: 0.25rem;
  --rio-s2: 0.5rem;
  --rio-s3: 0.75rem;
  --rio-s4: 1rem;
  --rio-s5: 1.5rem;
  --rio-s6: 2rem;
  --rio-s7: 3rem;

  --rio-radius: 10px;
  --rio-radius-sm: 6px;
  --rio-radius-lg: 14px;
  --rio-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --rio-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10);

  --rio-sidebar-w: 240px;
  --rio-topbar-h: 56px;

  /* ----------------------------------------------------------
   * 1.b. Typography tokens — three families, consistent scale.
   * ---------------------------------------------------------- */

  /* Latin UI — Geist leads, then Inter / Plex Sans, then platform UI. */
  --rio-font-sans:
    "Geist",
    "Inter",
    "IBM Plex Sans",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    sans-serif;

  /* Arabic UI — compact admin surfaces (buttons, navbars, sidebar
   * labels, table cells, badges, form labels). Tajawal first; Noto
   * Naskh as a graceful fallback so Arabic text never lands on a
   * Latin face. */
  --rio-font-arabic:
    "Tajawal",
    "Noto Naskh Arabic",
    system-ui,
    sans-serif;

  /* Arabic body — long-form copy, descriptions, settings/help pages.
   * Noto Naskh has higher x-height + softer terminals → reads better
   * in long paragraphs than Tajawal. */
  --rio-font-arabic-body:
    "Noto Naskh Arabic",
    "Tajawal",
    serif;

  /* Code — Geist Mono, then JetBrains/Plex Mono, then platform mono. */
  --rio-font-mono:
    "Geist Mono",
    "JetBrains Mono",
    "IBM Plex Mono",
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Consolas,
    "Liberation Mono",
    monospace;

  /* Size scale — rem-based, 16px html root.
   * Floor on small text is 13px (--rio-fs-xs); body lands at 16px. */
  --rio-font-size-base: 1rem;        /* 16px — the body baseline */
  --rio-fs-xs:    0.8125rem;          /* 13px — smallest helper text */
  --rio-fs-sm:    0.875rem;           /* 14px — dense table/form helpers */
  --rio-fs-md:    0.9375rem;          /* 15px — sidebar / nav / table cells */
  --rio-fs-base:  1rem;               /* 16px — body, button label */
  --rio-fs-lg:    1.0625rem;          /* 17px — main prose body */
  --rio-fs-xl:    1.25rem;            /* 20px — section h3 */
  --rio-fs-h3:    1.375rem;           /* 22px */
  --rio-fs-h2:    1.625rem;           /* 26px */
  --rio-fs-h1:    2.125rem;           /* 34px */
  --rio-fs-display: 2.5rem;           /* 40px — hero / login title */

  /* Line heights — tuned per script. Arabic needs more leading because
   * Naskh letterforms hang above and below the baseline. */
  --rio-lh-tight:  1.25;              /* h1/h2/h3, big display */
  --rio-lh-ui:     1.45;              /* dense UI: buttons, tags, table */
  --rio-lh-body:   1.6;               /* English paragraph body */
  --rio-lh-arabic: 1.9;               /* Arabic paragraph body */

  /* Weights — opt-in via tokens so the design system can tune
   * regular/medium/semibold/bold without touching every site. */
  --rio-fw-regular:  400;
  --rio-fw-medium:   500;
  --rio-fw-semibold: 600;
  --rio-fw-bold:     700;

  /* Tracking (Latin only — Arabic resets to 0 in §1.c). Geist is
   * drawn for slight negative tracking on display sizes. */
  --rio-tracking-display: -0.022em;
  --rio-tracking-heading: -0.012em;
  --rio-tracking-body:    -0.003em;
  --rio-tracking-tabular: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --rio-bg: #0b1120;
    --rio-surface: #161e2e;
    --rio-text: #f1f5f9;          /* crisper than the old #e5e7eb */
    --rio-text-muted: #c0c8d6;    /* AAA contrast vs surface */
    --rio-text-subtle: #8d97ab;
    --rio-border: #2d384c;
    --rio-success-bg: #064e3b;
    --rio-warning-bg: #422006;
    --rio-danger-bg: #450a0a;
    --rio-info-bg: #3a1308;
    --rio-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --rio-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  }
}

html[data-rio-theme="dark"] {
  --rio-bg: #0b1120;
  --rio-surface: #161e2e;
  --rio-text: #f1f5f9;
  --rio-text-muted: #c0c8d6;
  --rio-text-subtle: #8d97ab;
  --rio-border: #2d384c;
  --rio-success-bg: #064e3b;
  --rio-warning-bg: #422006;
  --rio-danger-bg: #450a0a;
  --rio-info-bg: #3a1308;
  --rio-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  --rio-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
}
html[data-rio-theme="light"] {
  --rio-bg: #ebeef4;
  --rio-surface: #ffffff;
  --rio-surface-2: #f5f7fb;
  --rio-text: #0a0e1a;
  --rio-text-muted: #3d4452;
  --rio-text-subtle: #5e6577;
  --rio-border: #cdd3df;
  --rio-border-strong: #b8c0cf;
}

/* ============================================================
 * 1.c. Reset + base typography
 * ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* Set the html root font-size explicitly — a few browsers / user
 * preferences ship a non-16px default, and our scale assumes 16px. */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  /* Tab character width in code blocks. */
  tab-size: 2;
}

body {
  font-family: var(--rio-font-sans);
  font-size: var(--rio-font-size-base);   /* 16px */
  line-height: var(--rio-lh-body);        /* 1.6 */
  font-weight: var(--rio-fw-regular);
  color: var(--rio-text);
  background: var(--rio-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Safe global features — kerning + contextual alternates apply
   * cleanly to every script. Stylistic alternates (Geist's ss01/ss03/
   * cv11) are opted-in via .rio-latin so they never interfere with
   * Tajawal / Noto Naskh / CJK shaping. */
  font-feature-settings: "kern", "calt";
  font-variant-ligatures: common-ligatures;
  letter-spacing: var(--rio-tracking-body);
}

/* Latin-only display polish — auto-applies to Latin headings.
 * Geist's "ss01" + "ss03" + "cv11" tighten figure widths and swap
 * single-storey alternates so headings feel like a designed face. */
.rio-latin,
h1, h2, h3, h4,
.rio-list-title, .rio-form-title, .rio-dash-greeting, .rio-auth-title {
  font-feature-settings: "kern", "calt", "ss01", "ss03", "cv11";
}

/* ============================================================
 * 1.d. Arabic-aware typography
 * ------------------------------------------------------------
 * Two contexts:
 *   - UI surfaces  → Tajawal      (compact, geometric, dense UI)
 *   - Body / prose → Noto Naskh   (humanist, paragraph-y)
 * Both unicode-range trigger only on Arabic codepoints, so no
 * Latin-only page pays the download cost.
 * ============================================================ */

/* Arabic UI context — anything tagged lang="ar" or dir="rtl" defaults
 * to Tajawal. Strip Latin-tuned tracking + stylistic alternates so
 * Arabic shaping isn't disrupted. */
:lang(ar),
[dir="rtl"],
[dir="rtl"] *,
.rio-arabic,
.rio-arabic * {
  font-family: var(--rio-font-arabic);
  letter-spacing: 0 !important;
  font-feature-settings: "kern" !important;
  line-height: var(--rio-lh-ui);
}

/* Arabic body context — paragraphs, descriptions, help text.
 * Switch to Noto Naskh + extra leading. Opt-in via lang="ar" on a
 * <p> / blockquote / .rio-prose container, or via .rio-arabic-body. */
p:lang(ar),
li:lang(ar),
blockquote:lang(ar),
.rio-prose:lang(ar),
.rio-prose:lang(ar) p,
.rio-prose:lang(ar) li,
.rio-arabic-body,
.rio-arabic-body * {
  font-family: var(--rio-font-arabic-body);
  line-height: var(--rio-lh-arabic);
  font-size: var(--rio-fs-lg);
  font-weight: var(--rio-fw-regular);
}

/* ============================================================
 * 1.e. Headings, links, paragraphs, code
 * ============================================================ */

h1, h2, h3, h4 {
  margin: 0 0 var(--rio-s3);
  line-height: var(--rio-lh-tight);
  letter-spacing: var(--rio-tracking-heading);
  color: var(--rio-text);
}
h1 {
  font-size: var(--rio-fs-h1);            /* 34px */
  font-weight: var(--rio-fw-bold);
  letter-spacing: var(--rio-tracking-display);
}
h2 {
  font-size: var(--rio-fs-h2);            /* 26px */
  font-weight: var(--rio-fw-semibold);
}
h3 {
  font-size: var(--rio-fs-h3);            /* 22px */
  font-weight: var(--rio-fw-semibold);
}
h4 {
  font-size: var(--rio-fs-md);            /* 15px — section subtitle */
  font-weight: var(--rio-fw-semibold);
  letter-spacing: 0;
}

/* Arabic-tagged headings — keep the size scale, drop the negative
 * tracking. Tajawal carries enough weight for display sizes. */
:lang(ar) h1, :lang(ar) h2, :lang(ar) h3, :lang(ar) h4,
[dir="rtl"] h1, [dir="rtl"] h2, [dir="rtl"] h3, [dir="rtl"] h4,
h1:lang(ar), h2:lang(ar), h3:lang(ar), h4:lang(ar) {
  letter-spacing: 0;
  font-family: var(--rio-font-arabic);
  font-weight: var(--rio-fw-bold);
}

p { margin: 0 0 var(--rio-s4); }

a { color: var(--rio-accent); text-decoration: none; font-weight: var(--rio-fw-medium); }
a:hover { text-decoration: underline; }

code, kbd, samp {
  font-family: var(--rio-font-mono);
  font-size: 0.875em;                     /* relative to context */
  font-variant-ligatures: none;           /* "==" stays as 2 glyphs */
  font-feature-settings: "kern";
  background: rgba(var(--rio-accent-rgb) / 0.07);
  padding: 0.05em 0.35em;
  border-radius: var(--rio-radius-sm);
  letter-spacing: 0;
}
pre {
  font-family: var(--rio-font-mono);
  font-size: var(--rio-fs-sm);            /* 14px */
  line-height: 1.6;
  font-variant-ligatures: none;
  font-feature-settings: "kern";
  background: var(--rio-surface);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius);
  padding: var(--rio-s3) var(--rio-s4);
  overflow-x: auto;
  margin: 0 0 var(--rio-s4);
}
pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  border-radius: 0;
}

/* ============================================================
 * 1.f. Utility classes for typography
 * ============================================================ */

/* Tabular numerals on data — IDs, counts, timestamps. */
.rio-num, [data-tabular] { font-variant-numeric: tabular-nums; }

/* Strong, content-grade prose container (settings/help pages). */
.rio-prose {
  font-size: var(--rio-fs-lg);            /* 17px */
  line-height: var(--rio-lh-body);        /* 1.6 */
  max-width: 68ch;
}
.rio-prose p { margin: 0 0 var(--rio-s4); }
.rio-prose:lang(ar) p { line-height: var(--rio-lh-arabic); }

/* Force a specific size on muted / hint text — never below 13px. */
.rio-text-xs { font-size: var(--rio-fs-xs); }
.rio-text-sm { font-size: var(--rio-fs-sm); }
.rio-text-md { font-size: var(--rio-fs-md); }

/* Force-dense line-height for chip / badge / tag-like surfaces. */
.rio-tight { line-height: var(--rio-lh-ui); }

/* Mobile readability bump — push body up to 17px below 600px so
 * thumb-typing forms and reading copy stays comfortable. */
@media (max-width: 600px) {
  html { font-size: 16.5px; }
  .rio-prose { font-size: var(--rio-fs-lg); }
}

/* ============================================================
 * 2. Shell — topbar / sidebar / main / footer
 * ============================================================ */

.rio-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.rio-banner {
  padding: var(--rio-s2) var(--rio-s4);
  text-align: center;
  font-weight: 600;
  font-size: var(--rio-fs-sm);
}
.rio-banner--demo {
  background: var(--rio-warning-bg);
  color: var(--rio-warning);
  border-bottom: 1px solid var(--rio-border);
}

.rio-topbar {
  display: flex;
  align-items: center;
  gap: var(--rio-s4);
  padding: 0 var(--rio-s4);
  height: var(--rio-topbar-h);
  background: var(--rio-surface);
  border-bottom: 1px solid var(--rio-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.rio-topbar-brand {
  font-weight: var(--rio-fw-bold);
  font-size: var(--rio-fs-lg);                 /* 17px */
  color: var(--rio-text);
  letter-spacing: var(--rio-tracking-heading);
}
.rio-topbar-brand:hover { text-decoration: none; }
.rio-topbar-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--rio-s4);
  flex-wrap: wrap;
}
.rio-topbar-identity {
  color: var(--rio-text-muted);
  font-size: var(--rio-fs-md);                 /* 15px */
  font-weight: var(--rio-fw-regular);
}
.rio-topbar-link {
  color: var(--rio-text-muted);
  font-size: var(--rio-fs-md);
  font-weight: var(--rio-fw-medium);
}
.rio-topbar-link:hover { color: var(--rio-text); }
.rio-topbar-logout { display: inline; }
.rio-sidebar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  padding: var(--rio-s1) var(--rio-s2);
  color: var(--rio-text);
  cursor: pointer;
}
.rio-theme-toggle {
  background: none;
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  padding: 0.45rem 0.8rem;
  font-size: var(--rio-fs-xs);                 /* 13px floor */
  font-weight: var(--rio-fw-medium);
  color: var(--rio-text-muted);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
}
.rio-theme-toggle:hover {
  border-color: rgb(var(--rio-accent-rgb));
  color: var(--rio-text);
}

.rio-layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  min-height: 0;
}

.rio-sidebar {
  background: var(--rio-surface);
  border-right: 1px solid var(--rio-border);
  padding: var(--rio-s5) var(--rio-s4);
}
.rio-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.rio-sidebar-section {
  font-size: var(--rio-fs-xs);                 /* 13px floor */
  font-weight: var(--rio-fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--rio-text-subtle);
  margin: var(--rio-s5) 0 var(--rio-s2);
  padding: 0 0.6rem;
}
.rio-sidebar-section:first-child { margin-top: 0; }
.rio-sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--rio-radius-sm);
  color: var(--rio-text);
  font-size: var(--rio-fs-md);                 /* 15px */
  font-weight: var(--rio-fw-medium);
  line-height: var(--rio-lh-ui);
  transition: background 0.12s, color 0.12s;
}
.rio-sidebar-link:hover {
  background: rgba(var(--rio-accent-rgb) / 0.08);
  color: rgb(var(--rio-accent-rgb));
  text-decoration: none;
}
.rio-sidebar-link .rio-icon {
  width: 17px;
  height: 17px;
  color: var(--rio-text-subtle);
  transition: color 0.12s;
}
.rio-sidebar-link:hover .rio-icon { color: rgb(var(--rio-accent-rgb)); }

.rio-main {
  padding: var(--rio-s5);
  min-width: 0;
}

.rio-footer {
  padding: var(--rio-s3) var(--rio-s4);
  text-align: center;
  font-size: var(--rio-fs-sm);
  color: var(--rio-text-muted);
  border-top: 1px solid var(--rio-border);
}

/* ============================================================
 * 3. Page chrome — headers, breadcrumbs, cards
 * ============================================================ */

.rio-page-header {
  margin-bottom: var(--rio-s5);
}
.rio-breadcrumbs {
  font-size: var(--rio-fs-sm);
  color: var(--rio-text-muted);
  margin-bottom: var(--rio-s2);
}
.rio-breadcrumbs a { color: var(--rio-text-muted); }
.rio-breadcrumbs a:hover { color: var(--rio-accent); }
.rio-page-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--rio-s4);
  flex-wrap: wrap;
}

.rio-card {
  background: var(--rio-surface);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius);
  padding: var(--rio-s5);
  margin-bottom: var(--rio-s5);
  box-shadow: var(--rio-shadow);
}
.rio-card-section {
  margin-top: var(--rio-s5);
  padding-top: var(--rio-s4);
  border-top: 1px solid var(--rio-border);
}
.rio-empty {
  padding: var(--rio-s5);
  text-align: center;
  color: var(--rio-text-muted);
}
.rio-meta {
  color: var(--rio-text-muted);
  font-size: var(--rio-fs-sm);
}

/* ============================================================
 * 4. Buttons
 * ============================================================ */

.rio-button {
  display: inline-flex;
  align-items: center;
  gap: var(--rio-s1);
  padding: var(--rio-s2) var(--rio-s4);
  background: var(--rio-surface);
  color: var(--rio-text);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  font-size: var(--rio-fs-md);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 150ms ease;
}
.rio-button:hover { opacity: 0.85; text-decoration: none; }
.rio-button:disabled { opacity: 0.5; cursor: not-allowed; }
.rio-button--primary {
  background: var(--rio-accent);
  color: #fff;
  border-color: var(--rio-accent);
}
.rio-button--primary:hover { color: #fff; }
.rio-button--danger {
  background: var(--rio-danger);
  color: #fff;
  border-color: var(--rio-danger);
}
.rio-button--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--rio-text-muted);
}
.rio-button--ghost:hover { color: var(--rio-text); background: rgba(var(--rio-accent-rgb) / 0.05); }
.rio-button--danger-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--rio-danger);
}
.rio-button--danger-ghost:hover { background: var(--rio-danger-bg); }

/* ============================================================
 * 5. Forms — fieldsets, fields, inputs
 * ============================================================ */

.rio-form { margin: 0; }
.rio-fieldset {
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius);
  padding: var(--rio-s5);
  margin: 0 0 var(--rio-s5);
  background: var(--rio-surface);
}
.rio-fieldset > legend {
  font-weight: 600;
  padding: 0 var(--rio-s2);
  color: var(--rio-text);
}
.rio-fieldset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--rio-s4);
}

.rio-field {
  display: flex;
  flex-direction: column;
  gap: var(--rio-s1);
}
.rio-field--full { grid-column: 1 / -1; }
.rio-field-label {
  font-weight: 500;
  font-size: var(--rio-fs-md);
  color: var(--rio-text);
}
.rio-required {
  color: var(--rio-danger);
  margin-left: var(--rio-s1);
}
.rio-field-hint {
  margin: 0;
  font-size: var(--rio-fs-xs);
  color: var(--rio-text-muted);
}
.rio-field-errors {
  list-style: none;
  margin: var(--rio-s1) 0 0;
  padding: 0;
  color: var(--rio-danger);
  font-size: var(--rio-fs-sm);
}

.rio-input,
.rio-textarea,
.rio-select {
  width: 100%;
  padding: var(--rio-s2) var(--rio-s3);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  background: var(--rio-bg);
  color: var(--rio-text);
  font: inherit;
}
.rio-input:focus,
.rio-textarea:focus,
.rio-select:focus {
  outline: none;
  border-color: var(--rio-accent);
  box-shadow: 0 0 0 3px rgba(var(--rio-accent-rgb) / 0.18);
}
.rio-input:disabled,
.rio-textarea:disabled,
.rio-select:disabled {
  background: var(--rio-bg);
  color: var(--rio-text-muted);
  cursor: not-allowed;
}
.rio-textarea { font-family: var(--rio-font-sans); resize: vertical; }

.rio-checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--rio-s2);
  cursor: pointer;
}
.rio-checkbox input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--rio-accent);
}
.rio-checkbox-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--rio-s2);
}

.rio-form-actions {
  display: flex;
  gap: var(--rio-s2);
  flex-wrap: wrap;
  margin-top: var(--rio-s4);
}

/* ============================================================
 * 6. Tables
 * ============================================================ */

.rio-table {
  width: 100%;
  border-collapse: collapse;
}
.rio-table th, .rio-table td {
  padding: var(--rio-s2) var(--rio-s3);
  text-align: left;
  border-bottom: 1px solid var(--rio-border);
}
.rio-table th {
  font-weight: 600;
  font-size: var(--rio-fs-sm);
  color: var(--rio-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.rio-th--number, .rio-td--number { text-align: right; font-variant-numeric: tabular-nums; }
.rio-th--checkbox, .rio-td--checkbox { text-align: center; }
.rio-th--actions, .rio-td--actions { width: 1%; white-space: nowrap; }
.rio-table--striped tbody tr:nth-child(odd) { background: rgba(var(--rio-accent-rgb) / 0.03); }
.rio-table--striped tbody tr:hover { background: rgba(var(--rio-accent-rgb) / 0.08); }

/* Sortable headers — wrap the label in a link; arrow surfaces in the
 * active direction. Header looks identical to a non-sortable cell
 * until the user is hovering / has clicked. */
.rio-th-sort {
  color: inherit;
  text-decoration: none;
  display: inline-block;
  white-space: nowrap;
}
.rio-th-sort:hover { color: var(--rio-accent); text-decoration: none; }
.rio-th--sort-asc .rio-th-sort,
.rio-th--sort-desc .rio-th-sort { color: var(--rio-accent); }

.rio-list { padding: 0; }
.rio-list .rio-table { margin: 0; }
.rio-list .rio-table th:first-child,
.rio-list .rio-table td:first-child { padding-left: var(--rio-s5); }
.rio-list .rio-table th:last-child,
.rio-list .rio-table td:last-child { padding-right: var(--rio-s5); }

/* Definition lists for the user profile show-grid. */
.rio-dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--rio-s2) var(--rio-s5);
  margin: 0;
}
.rio-dl dt { font-weight: 600; color: var(--rio-text-muted); }
.rio-dl dd { margin: 0; }

/* ============================================================
 * 7. Filters / search / pagination
 * ============================================================ */

.rio-search-bar {
  display: flex;
  gap: var(--rio-s2);
  margin-bottom: var(--rio-s4);
}
.rio-search-input {
  flex: 1;
  padding: var(--rio-s2) var(--rio-s3);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  background: var(--rio-surface);
  color: var(--rio-text);
  font: inherit;
}
.rio-search-input:focus {
  outline: none;
  border-color: var(--rio-accent);
}

.rio-filters {
  background: var(--rio-surface);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius);
  padding: var(--rio-s4);
  margin-bottom: var(--rio-s4);
}
.rio-filters-title {
  font-size: var(--rio-fs-xs);
  text-transform: uppercase;
  color: var(--rio-text-muted);
  margin: 0 0 var(--rio-s2);
}
.rio-filter-group { margin-bottom: var(--rio-s2); }
.rio-filter-group summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--rio-s1) 0;
}
.rio-filter-options {
  list-style: none;
  margin: var(--rio-s2) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--rio-s1);
}
.rio-filter-chip {
  display: inline-block;
  padding: var(--rio-s1) var(--rio-s3);
  background: var(--rio-bg);
  color: var(--rio-text);
  border: 1px solid var(--rio-border);
  border-radius: 999px;
  font-size: var(--rio-fs-sm);
}
.rio-filter-chip:hover { text-decoration: none; border-color: var(--rio-accent); }
.rio-filter-chip--active {
  background: var(--rio-accent);
  color: #fff;
  border-color: var(--rio-accent);
}

.rio-pagination {
  display: flex;
  align-items: center;
  gap: var(--rio-s3);
  margin-top: var(--rio-s4);
  padding-top: var(--rio-s3);
}
.rio-pagination-link {
  padding: var(--rio-s1) var(--rio-s3);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius-sm);
  font-size: var(--rio-fs-md);
  color: var(--rio-text);
}
.rio-pagination-link:hover { text-decoration: none; border-color: var(--rio-accent); }

/* ============================================================
 * 8. Pills / flashes / timeline / tabs
 * ============================================================ */

.rio-pill {
  display: inline-block;
  padding: var(--rio-s1) var(--rio-s3);
  border-radius: 999px;
  font-size: var(--rio-fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.rio-pill--badge-success { background: var(--rio-success-bg); color: var(--rio-success); }
.rio-pill--badge-neutral { background: var(--rio-bg); color: var(--rio-text-muted); border: 1px solid var(--rio-border); }
.rio-pill--badge-danger  { background: var(--rio-danger-bg);  color: var(--rio-danger); }
.rio-pill--badge-warning { background: var(--rio-warning-bg); color: var(--rio-warning); }

.rio-flash {
  padding: var(--rio-s3) var(--rio-s4);
  border-radius: var(--rio-radius);
  margin-bottom: var(--rio-s4);
}
.rio-flash--success { background: var(--rio-success-bg); color: var(--rio-success); }
.rio-flash--error   { background: var(--rio-danger-bg);  color: var(--rio-danger); }
.rio-flash--warning { background: var(--rio-warning-bg); color: var(--rio-warning); }
.rio-flash--info    { background: var(--rio-info-bg);    color: var(--rio-accent); }
.rio-flash ul { margin: var(--rio-s2) 0 0; padding-left: var(--rio-s5); }

.rio-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--rio-s2);
}
.rio-timeline-item {
  padding: var(--rio-s2) var(--rio-s3);
  border-left: 3px solid var(--rio-border);
  background: var(--rio-bg);
  border-radius: 0 var(--rio-radius-sm) var(--rio-radius-sm) 0;
}
.rio-timeline-item--success { border-left-color: var(--rio-success); }
.rio-timeline-item--info    { border-left-color: var(--rio-accent); }
.rio-timeline-item--warning { border-left-color: var(--rio-warning); }
.rio-timeline-item--error   { border-left-color: var(--rio-danger); }
.rio-timeline-item--muted   { border-left-color: var(--rio-border); }

.rio-tabs {
  display: flex;
  gap: var(--rio-s1);
  border-bottom: 1px solid var(--rio-border);
  margin-bottom: var(--rio-s4);
  flex-wrap: wrap;
}
.rio-tab {
  padding: var(--rio-s2) var(--rio-s4);
  color: var(--rio-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.rio-tab:hover { color: var(--rio-text); text-decoration: none; }
.rio-tab--active {
  color: var(--rio-accent);
  border-bottom-color: var(--rio-accent);
  font-weight: 600;
}

/* ============================================================
 * 9. Confirm-delete + error pages + login
 * ============================================================ */

.rio-confirm h2 { font-size: 1rem; margin-top: var(--rio-s4); }
.rio-confirm-section { margin-top: var(--rio-s4); }
.rio-cascade-list {
  list-style: disc;
  padding-left: var(--rio-s5);
  color: var(--rio-text-muted);
}

.rio-error { text-align: center; }
.rio-error-status {
  font-size: 3rem;
  font-weight: 700;
  margin: 0;
  color: var(--rio-text-muted);
  font-variant-numeric: tabular-nums;
}

.rio-login {
  max-width: 360px;
  margin: var(--rio-s7) auto;
  background: var(--rio-surface);
  border: 1px solid var(--rio-border);
  border-radius: var(--rio-radius);
  padding: var(--rio-s6);
  box-shadow: var(--rio-shadow-lg);
}
.rio-login-title { text-align: center; margin-bottom: var(--rio-s5); }
.rio-form--login .rio-button { width: 100%; justify-content: center; }

/* ============================================================
 * 10. Icons
 * ============================================================ */

.rio-icon {
  display: inline-block;
  vertical-align: -2px;
  width: 1em;
  height: 1em;
}

/* ============================================================
 * 11. Responsive — mobile-first
 * ============================================================ */

/* Tables overflow horizontally on narrow screens. */
.rio-list, .rio-card { overflow-x: auto; }

/* Mobile: sidebar collapsed off-canvas behind a hamburger. */
.rio-sidebar {
  display: none;
  position: fixed;
  inset: var(--rio-topbar-h) 0 0 0;
  z-index: 20;
  width: 80vw;
  max-width: 320px;
  border-right: 1px solid var(--rio-border);
  box-shadow: var(--rio-shadow-lg);
  overflow-y: auto;
}
.rio-shell[data-sidebar="open"] .rio-sidebar { display: block; }
.rio-sidebar-toggle { display: inline-flex; }

/* Tablet: two-column layout, sidebar pinned. */
@media (min-width: 768px) {
  .rio-layout { grid-template-columns: var(--rio-sidebar-w) 1fr; }
  .rio-sidebar {
    display: block;
    position: static;
    width: auto;
    max-width: none;
    box-shadow: none;
  }
  .rio-sidebar-toggle { display: none; }
  .rio-fieldset-grid { grid-template-columns: 1fr 1fr; }
  .rio-checkbox-list { grid-template-columns: 1fr 1fr; }
}

/* Desktop: wider sidebar, more padding. */
@media (min-width: 1280px) {
  :root { --rio-sidebar-w: 280px; }
  .rio-main { padding: var(--rio-s6) var(--rio-s7); }
  .rio-checkbox-list { grid-template-columns: 1fr 1fr 1fr; }
}

/* Print: drop the chrome. */
@media print {
  .rio-topbar, .rio-sidebar, .rio-footer, .rio-form-actions, .rio-page-actions a { display: none !important; }
  .rio-card { box-shadow: none; border-color: #ccc; }
  body { background: #fff; }
}