/*!
 * HyperDC UI — core design system
 * Tokens, base elements, primitives. No framework dependency.
 * Layout concept: engineered clarity — white/cool-gray canvas, navy ink, brand blue for action,
 * a green "LED" signal for live/online states, monospace spec labels for hardware facts.
 */

/* ==========================================================================
   1. Tokens
   ========================================================================== */
:root {
  /* Brand blue (logo #0071bc = 600) */
  --hdc-blue-50: #eef6fc;
  --hdc-blue-100: #d6eaf8;
  --hdc-blue-200: #acd4f1;
  --hdc-blue-300: #74b6e6;
  --hdc-blue-400: #3b95d6;
  --hdc-blue-500: #0f80c8;
  --hdc-blue-600: #0071bc;
  --hdc-blue-700: #005c9a;
  --hdc-blue-800: #054a7c;
  --hdc-blue-900: #0a3b62;
  --hdc-blue-950: #062541;

  /* Cool neutrals, biased toward the brand blue (logo ink #1d2533 = 800) */
  --hdc-gray-0: #ffffff;
  --hdc-gray-25: #fbfcfe;
  --hdc-gray-50: #f5f8fb;
  --hdc-gray-100: #edf1f6;
  --hdc-gray-150: #e4eaf1;
  --hdc-gray-200: #d9e1ea;
  --hdc-gray-300: #c3cedb;
  --hdc-gray-400: #93a2b5;
  --hdc-gray-500: #66768b;
  --hdc-gray-600: #4b5a6e;
  --hdc-gray-700: #344255;
  --hdc-gray-800: #1d2533;
  --hdc-gray-900: #111827;
  --hdc-gray-950: #0a0f1a;

  /* Night navy — always-dark sections and dark mode */
  --hdc-night-950: #040a14;
  --hdc-night-900: #07101e;
  --hdc-night-850: #0a1628;
  --hdc-night-800: #0e1d33;
  --hdc-night-700: #152842;
  --hdc-night-600: #1f3555;
  --hdc-night-500: #2c4870;

  /* Signals */
  --hdc-green-50: #ecfdf3;
  --hdc-green-500: #12b76a;
  --hdc-green-600: #079455;
  --hdc-green-700: #067647;
  --hdc-amber-50: #fffaeb;
  --hdc-amber-500: #f5a524;
  --hdc-amber-600: #dc8a04;
  --hdc-amber-700: #b54708;
  --hdc-red-50: #fef3f2;
  --hdc-red-500: #e5484d;
  --hdc-red-600: #d92d20;
  --hdc-red-700: #b42318;
  --hdc-violet-50: #f4f1ff;
  --hdc-violet-500: #7c5cff;
  --hdc-violet-600: #6941f0;
  --hdc-cyan-400: #22c3ee;
  --hdc-cyan-500: #06a5d6;

  /* ---- Semantic tokens (light) ---- */
  --hdc-bg: var(--hdc-gray-0);
  --hdc-bg-soft: var(--hdc-gray-50);
  --hdc-bg-muted: var(--hdc-gray-100);
  --hdc-surface: var(--hdc-gray-0);
  --hdc-surface-raised: var(--hdc-gray-0);
  --hdc-surface-sunken: var(--hdc-gray-50);
  --hdc-surface-hover: var(--hdc-gray-50);
  --hdc-overlay: rgba(7, 16, 30, .56);

  --hdc-border: var(--hdc-gray-150);
  --hdc-border-strong: var(--hdc-gray-200);
  --hdc-border-input: var(--hdc-gray-300);

  --hdc-heading: var(--hdc-gray-900);
  --hdc-text: var(--hdc-gray-800);
  --hdc-text-2: var(--hdc-gray-600);
  /* A touch darker than gray-500: muted text keeps ≥4.5:1 on sunken/muted surfaces (gray-50 4.88, gray-100 4.58). */
  --hdc-text-3: #5f6e82;
  --hdc-text-disabled: var(--hdc-gray-400);

  --hdc-primary: var(--hdc-blue-600);
  --hdc-primary-hover: var(--hdc-blue-700);
  --hdc-primary-active: var(--hdc-blue-800);
  --hdc-primary-soft: var(--hdc-blue-50);
  --hdc-primary-soft-2: var(--hdc-blue-100);
  --hdc-primary-text: var(--hdc-blue-700);
  --hdc-on-primary: #ffffff;
  /* Solid fills that carry --hdc-on-primary text (buttons, solid badges, active pager/steps): ≥4.5:1 with white. */
  --hdc-primary-fill: var(--hdc-primary);
  --hdc-primary-fill-hover: var(--hdc-primary-hover);
  --hdc-link: var(--hdc-blue-600);
  --hdc-link-hover: var(--hdc-blue-800);
  --hdc-focus-ring: 0 0 0 3px rgba(0, 113, 188, .28);

  --hdc-success: var(--hdc-green-600);
  --hdc-success-soft: var(--hdc-green-50);
  --hdc-success-text: var(--hdc-green-700);
  --hdc-warning: var(--hdc-amber-500);
  --hdc-warning-soft: var(--hdc-amber-50);
  --hdc-warning-text: var(--hdc-amber-700);
  --hdc-danger: var(--hdc-red-600);
  --hdc-danger-soft: var(--hdc-red-50);
  --hdc-danger-text: var(--hdc-red-700);
  --hdc-info: var(--hdc-blue-600);
  --hdc-info-soft: var(--hdc-blue-50);
  --hdc-info-text: var(--hdc-blue-700);
  --hdc-ai: var(--hdc-violet-600);
  --hdc-ai-soft: var(--hdc-violet-50);
  --hdc-led: var(--hdc-green-500);
  --hdc-accent: var(--hdc-cyan-500);

  /* Brand surfaces */
  --hdc-brand-gradient: linear-gradient(135deg, #0071bc 0%, #0a5d9e 45%, #0b3f70 100%);
  --hdc-brand-glow: radial-gradient(60% 80% at 80% 0%, rgba(34, 195, 238, .22) 0%, transparent 60%);
  --hdc-grid-line: rgba(0, 113, 188, .07);

  /* Typography */
  --hdc-font-sans: 'HDC Sans', 'HDC Arabic', 'HDC Hebrew', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --hdc-font-mono: 'HDC Mono', ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Menlo, Consolas, monospace;
  --hdc-fs-2xs: .6875rem;
  --hdc-fs-xs: .75rem;
  --hdc-fs-sm: .875rem;
  --hdc-fs-base: 1rem;
  --hdc-fs-md: 1.0625rem;
  --hdc-fs-lg: 1.125rem;
  --hdc-fs-xl: 1.25rem;
  --hdc-fs-h4: 1.1875rem;
  --hdc-fs-h3: clamp(1.25rem, 1.12rem + .55vw, 1.5rem);
  --hdc-fs-h2: clamp(1.75rem, 1.32rem + 1.75vw, 2.625rem);
  --hdc-fs-h1: clamp(2.125rem, 1.45rem + 2.8vw, 3.5rem);
  --hdc-fs-display: clamp(2.5rem, 1.55rem + 4.1vw, 4.375rem);
  --hdc-lh-tight: 1.08;
  --hdc-lh-heading: 1.18;
  --hdc-lh-body: 1.62;
  --hdc-tracking-display: -.035em;
  --hdc-tracking-heading: -.022em;
  --hdc-tracking-label: .08em;

  /* Shape */
  --hdc-r-xs: 6px;
  --hdc-r-sm: 8px;
  --hdc-r-md: 12px;
  --hdc-r-lg: 16px;
  --hdc-r-xl: 22px;
  --hdc-r-2xl: 28px;
  --hdc-r-pill: 999px;

  /* Elevation */
  --hdc-shadow-xs: 0 1px 2px rgba(16, 24, 40, .05);
  --hdc-shadow-sm: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .04);
  --hdc-shadow-md: 0 10px 28px -8px rgba(15, 33, 58, .14), 0 2px 6px rgba(15, 33, 58, .05);
  --hdc-shadow-lg: 0 28px 56px -16px rgba(15, 33, 58, .22), 0 4px 12px rgba(15, 33, 58, .06);
  --hdc-shadow-glow: 0 0 0 1px rgba(0, 113, 188, .22), 0 18px 48px -12px rgba(0, 113, 188, .42);

  /* Space & layout */
  --hdc-container: 1240px;
  --hdc-container-wide: 1440px;
  --hdc-container-narrow: 820px;
  --hdc-gutter: clamp(16px, 4vw, 32px);
  --hdc-section-y: clamp(3.5rem, 2rem + 5.5vw, 7rem);
  --hdc-header-h: 72px;
  --hdc-topbar-h: 0px;

  /* Motion */
  --hdc-ease: cubic-bezier(.2, .7, .2, 1);
  --hdc-ease-spring: cubic-bezier(.34, 1.4, .64, 1);
  --hdc-dur-1: 120ms;
  --hdc-dur-2: 200ms;
  --hdc-dur-3: 320ms;

  color-scheme: light;
}

/* ---- Dark mode: semantic tokens only ---- */
:root[data-theme="dark"] {
  --hdc-bg: var(--hdc-night-900);
  --hdc-bg-soft: var(--hdc-night-850);
  --hdc-bg-muted: var(--hdc-night-800);
  --hdc-surface: var(--hdc-night-850);
  --hdc-surface-raised: var(--hdc-night-800);
  --hdc-surface-sunken: var(--hdc-night-950);
  --hdc-surface-hover: var(--hdc-night-800);
  --hdc-overlay: rgba(2, 6, 14, .72);

  --hdc-border: rgba(148, 170, 200, .13);
  --hdc-border-strong: rgba(148, 170, 200, .2);
  --hdc-border-input: rgba(148, 170, 200, .28);

  --hdc-heading: #f2f6fb;
  --hdc-text: #d4dce7;
  --hdc-text-2: #a5b3c6;
  --hdc-text-3: #7f8ea3;
  --hdc-text-disabled: #55647a;

  --hdc-primary: #2b95e0;
  --hdc-primary-hover: #4aa8ec;
  --hdc-primary-active: #6bb9f0;
  --hdc-primary-soft: rgba(43, 149, 224, .13);
  --hdc-primary-soft-2: rgba(43, 149, 224, .22);
  --hdc-primary-text: #7cc2f3;
  --hdc-on-primary: #ffffff;
  /* #2b95e0 stays the accent (5.6:1 on dark surfaces); white text needs a deeper fill (4.79:1, 3.98:1 vs page). */
  --hdc-primary-fill: #1b77b9;
  --hdc-primary-fill-hover: #186aa4;
  --hdc-link: #5db4f0;
  --hdc-link-hover: #8fcbf5;
  --hdc-focus-ring: 0 0 0 3px rgba(74, 168, 236, .38);

  --hdc-success: #32d583;
  --hdc-success-soft: rgba(18, 183, 106, .13);
  --hdc-success-text: #6ce9a6;
  --hdc-warning: #fdb022;
  --hdc-warning-soft: rgba(245, 165, 36, .13);
  --hdc-warning-text: #fec84b;
  --hdc-danger: #f97066;
  --hdc-danger-soft: rgba(229, 72, 77, .14);
  --hdc-danger-text: #fda29b;
  --hdc-info: #4aa8ec;
  --hdc-info-soft: rgba(43, 149, 224, .13);
  --hdc-info-text: #7cc2f3;
  --hdc-ai: #a48bff;
  --hdc-ai-soft: rgba(124, 92, 255, .16);
  --hdc-led: #32d583;
  --hdc-accent: var(--hdc-cyan-400);

  --hdc-grid-line: rgba(120, 170, 230, .07);

  --hdc-shadow-xs: 0 1px 2px rgba(0, 0, 0, .3);
  --hdc-shadow-sm: 0 1px 3px rgba(0, 0, 0, .35), 0 1px 2px rgba(0, 0, 0, .2);
  --hdc-shadow-md: 0 12px 28px -8px rgba(0, 0, 0, .55), 0 2px 6px rgba(0, 0, 0, .25);
  --hdc-shadow-lg: 0 28px 60px -16px rgba(0, 0, 0, .7);
  --hdc-shadow-glow: 0 0 0 1px rgba(74, 168, 236, .35), 0 18px 48px -12px rgba(43, 149, 224, .45);

  color-scheme: dark;
}

/* Always-dark scope (footer, "night" sections) — reuses the dark semantic set */
.hdc-night {
  --hdc-bg: var(--hdc-night-900);
  --hdc-bg-soft: var(--hdc-night-850);
  --hdc-bg-muted: var(--hdc-night-800);
  --hdc-surface: rgba(255, 255, 255, .035);
  --hdc-surface-raised: rgba(255, 255, 255, .06);
  --hdc-surface-sunken: rgba(0, 0, 0, .25);
  --hdc-surface-hover: rgba(255, 255, 255, .07);
  --hdc-border: rgba(148, 170, 200, .14);
  --hdc-border-strong: rgba(148, 170, 200, .22);
  --hdc-border-input: rgba(148, 170, 200, .3);
  --hdc-heading: #f4f7fb;
  --hdc-text: #c9d3e0;
  --hdc-text-2: #9fb0c5;
  --hdc-text-3: #7a8aa1;
  --hdc-primary: #2b95e0;
  --hdc-primary-hover: #4aa8ec;
  --hdc-primary-soft: rgba(43, 149, 224, .14);
  --hdc-primary-soft-2: rgba(43, 149, 224, .24);
  --hdc-primary-text: #7cc2f3;
  --hdc-primary-fill: #1b77b9;
  --hdc-primary-fill-hover: #186aa4;
  --hdc-link: #7cc2f3;
  --hdc-link-hover: #b3dcf8;
  --hdc-led: #32d583;
  --hdc-grid-line: rgba(120, 170, 230, .08);
  color: var(--hdc-text);
  background-color: var(--hdc-bg);
  color-scheme: dark;
}

/* Brand-blue scope (CTA bands) */
.hdc-brand {
  --hdc-heading: #ffffff;
  --hdc-text: rgba(255, 255, 255, .9);
  --hdc-text-2: rgba(255, 255, 255, .78);
  --hdc-text-3: rgba(255, 255, 255, .62);
  --hdc-border: rgba(255, 255, 255, .18);
  --hdc-border-strong: rgba(255, 255, 255, .28);
  --hdc-surface: rgba(255, 255, 255, .08);
  --hdc-surface-raised: rgba(255, 255, 255, .12);
  --hdc-primary-soft: rgba(255, 255, 255, .14);
  --hdc-primary-text: #ffffff;
  --hdc-link: #ffffff;
  color: var(--hdc-text);
  background: var(--hdc-brand-glow), var(--hdc-brand-gradient);
}

/* ==========================================================================
   2. Base
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

/* Components set display:flex/grid; the hidden attribute must still win. */
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--hdc-header-h) + var(--hdc-topbar-h) + 16px);
}

body.hdc {
  margin: 0;
  min-height: 100vh;
  font-family: var(--hdc-font-sans);
  font-size: var(--hdc-fs-base);
  line-height: var(--hdc-lh-body);
  font-weight: 400;
  color: var(--hdc-text);
  background: var(--hdc-bg);
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

:where(.hdc) h1, :where(.hdc) h2, :where(.hdc) h3, :where(.hdc) h4, :where(.hdc) h5, :where(.hdc) h6,
:where(.hdc) .h1, :where(.hdc) .h2, :where(.hdc) .h3, :where(.hdc) .h4 {
  margin: 0 0 .5em;
  color: var(--hdc-heading);
  font-weight: 700;
  line-height: var(--hdc-lh-heading);
  letter-spacing: var(--hdc-tracking-heading);
  text-wrap: balance;
}
:where(.hdc) h1, :where(.hdc) .h1 { font-size: var(--hdc-fs-h1); line-height: var(--hdc-lh-tight); letter-spacing: var(--hdc-tracking-display); font-weight: 750; }
:where(.hdc) h2, :where(.hdc) .h2 { font-size: var(--hdc-fs-h2); line-height: 1.12; letter-spacing: -.028em; }
:where(.hdc) h3, :where(.hdc) .h3 { font-size: var(--hdc-fs-h3); }
:where(.hdc) h4, :where(.hdc) .h4 { font-size: var(--hdc-fs-h4); }
:where(.hdc) h5 { font-size: var(--hdc-fs-lg); }
:where(.hdc) h6 { font-size: var(--hdc-fs-base); }

:where(.hdc) p { margin: 0 0 1em; text-wrap: pretty; }
:where(.hdc) small, :where(.hdc) .hdc-small { font-size: var(--hdc-fs-sm); }
:where(.hdc) strong, :where(.hdc) b { font-weight: 650; }
:where(.hdc) img, :where(.hdc) video { max-width: 100%; height: auto; }
:where(.hdc) svg { max-width: 100%; } /* no height:auto here — it would override icon sizing */
:where(.hdc) img { border-style: none; }
:where(.hdc) hr { border: 0; border-top: 1px solid var(--hdc-border); margin: 2rem 0; }

:where(.hdc) a {
  color: var(--hdc-link);
  text-decoration: none;
  transition: color var(--hdc-dur-1) var(--hdc-ease);
}
:where(.hdc) a:hover { color: var(--hdc-link-hover); }
:where(.hdc) a:focus-visible,
:where(.hdc) button:focus-visible,
:where(.hdc) [tabindex]:focus-visible,
:where(.hdc) summary:focus-visible {
  outline: none;
  box-shadow: var(--hdc-focus-ring);
  border-radius: var(--hdc-r-xs);
}

:where(.hdc) code, :where(.hdc) kbd, :where(.hdc) pre, :where(.hdc) samp { font-family: var(--hdc-font-mono); font-size: .9em; }
:where(.hdc) code {
  padding: .12em .4em;
  border-radius: var(--hdc-r-xs);
  background: var(--hdc-bg-muted);
  color: var(--hdc-heading);
}
:where(.hdc) pre {
  overflow-x: auto;
  padding: 1rem 1.25rem;
  border-radius: var(--hdc-r-md);
  background: var(--hdc-night-900);
  color: #dbe5f1;
  line-height: 1.55;
}
:where(.hdc) pre code { padding: 0; background: none; color: inherit; }

:where(.hdc) ::selection { background: rgba(0, 113, 188, .2); }

:where(.hdc) .tabular { font-variant-numeric: tabular-nums; }

/* RTL */
[dir="rtl"] .hdc-flip-rtl { transform: scaleX(-1); }

/* ==========================================================================
   3. Layout primitives
   ========================================================================== */
.hdc-container {
  width: 100%;
  max-width: calc(var(--hdc-container) + var(--hdc-gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--hdc-gutter);
}
.hdc-container--wide { max-width: calc(var(--hdc-container-wide) + var(--hdc-gutter) * 2); }
.hdc-container--narrow { max-width: calc(var(--hdc-container-narrow) + var(--hdc-gutter) * 2); }

.hdc-stack { display: flex; flex-direction: column; gap: var(--hdc-stack-gap, 1rem); }
.hdc-cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--hdc-cluster-gap, .75rem); }
.hdc-split { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

.hdc-grid {
  display: grid;
  gap: var(--hdc-grid-gap, clamp(1rem, .6rem + 1.2vw, 1.5rem));
  grid-template-columns: repeat(var(--hdc-cols, 1), minmax(0, 1fr));
}
.hdc-grid--2 { --hdc-cols: 1; }
.hdc-grid--3 { --hdc-cols: 1; }
.hdc-grid--4 { --hdc-cols: 2; }
.hdc-grid--auto { grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--hdc-min, 260px)), 1fr)); }
@media (min-width: 640px) {
  .hdc-grid--2 { --hdc-cols: 2; }
  .hdc-grid--3 { --hdc-cols: 2; }
}
@media (min-width: 960px) {
  .hdc-grid--3 { --hdc-cols: 3; }
  .hdc-grid--4 { --hdc-cols: 4; }
}

/*
  Pinned to the containing block's start corner: left at its static position inside a horizontally scrolling
  table, a hidden label can sit hundreds of pixels to the right and widen the page on phones.
*/
.hdc-sr-only {
  position: absolute !important;
  inset-block-start: 0; inset-inline-start: 0;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); clip-path: inset(50%);
  white-space: nowrap; border: 0;
}
.hdc-skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  top: -100px;
  z-index: 1000;
  padding: .6rem 1rem;
  border-radius: var(--hdc-r-sm);
  background: var(--hdc-primary-fill);
  color: var(--hdc-on-primary) !important;
  font-weight: 600;
}
.hdc-skip-link:focus { top: 1rem; }

/* ==========================================================================
   4. Icons
   ========================================================================== */
.hdc-i {
  width: var(--hdc-i, 1.25em);
  height: var(--hdc-i, 1.25em);
  flex: 0 0 auto;
  vertical-align: -.25em;
  fill: none;
  stroke: currentColor;
}
.hdc-i--sm { --hdc-i: 1em; }
.hdc-i--lg { --hdc-i: 1.5em; }
.hdc-i--xl { --hdc-i: 2em; }

.hdc-icon-tile {
  --hdc-tile: 48px;
  display: inline-grid;
  place-items: center;
  width: var(--hdc-tile);
  height: var(--hdc-tile);
  flex: 0 0 auto;
  border-radius: var(--hdc-r-md);
  background: var(--hdc-primary-soft);
  color: var(--hdc-primary);
  box-shadow: inset 0 0 0 1px var(--hdc-primary-soft-2);
}
.hdc-icon-tile .hdc-i { --hdc-i: calc(var(--hdc-tile) * .5); }
.hdc-icon-tile--sm { --hdc-tile: 36px; border-radius: var(--hdc-r-sm); }
.hdc-icon-tile--lg { --hdc-tile: 60px; border-radius: var(--hdc-r-lg); }
.hdc-icon-tile--ink { background: var(--hdc-heading); color: var(--hdc-bg); box-shadow: none; }
.hdc-icon-tile--success { background: var(--hdc-success-soft); color: var(--hdc-success); box-shadow: none; }
.hdc-icon-tile--ai { background: var(--hdc-ai-soft); color: var(--hdc-ai); box-shadow: none; }

/* ==========================================================================
   5. Buttons
   ========================================================================== */
.hdc-btn {
  --hdc-btn-h: 44px;
  --hdc-btn-px: 1.15rem;
  --hdc-btn-bg: var(--hdc-primary-fill);
  --hdc-btn-fg: var(--hdc-on-primary);
  --hdc-btn-bd: transparent;
  --hdc-btn-bg-hover: var(--hdc-primary-fill-hover);
  --hdc-btn-fg-hover: var(--hdc-btn-fg);
  --hdc-btn-shadow: 0 1px 2px rgba(10, 30, 60, .12), inset 0 1px 0 rgba(255, 255, 255, .12);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: var(--hdc-btn-h);
  padding: 0 var(--hdc-btn-px);
  border: 1px solid var(--hdc-btn-bd);
  border-radius: var(--hdc-r-sm);
  background: var(--hdc-btn-bg);
  color: var(--hdc-btn-fg) !important;
  font: 600 var(--hdc-fs-sm)/1 var(--hdc-font-sans);
  font-size: .9375rem;
  letter-spacing: -.005em;
  white-space: nowrap;
  text-decoration: none !important;
  cursor: pointer;
  user-select: none;
  box-shadow: var(--hdc-btn-shadow);
  transition: background-color var(--hdc-dur-2) var(--hdc-ease), color var(--hdc-dur-2) var(--hdc-ease),
              border-color var(--hdc-dur-2) var(--hdc-ease), box-shadow var(--hdc-dur-2) var(--hdc-ease),
              transform var(--hdc-dur-1) var(--hdc-ease);
}
.hdc-btn:hover { background: var(--hdc-btn-bg-hover); color: var(--hdc-btn-fg-hover) !important; }
.hdc-btn:active { transform: translateY(1px); }
/* --hdc-btn-shadow must stay a real shadow (use "0 0 #0000" for none): "ring, none" is an invalid list and drops the focus ring */
.hdc-btn:focus-visible { outline: none; box-shadow: var(--hdc-focus-ring), var(--hdc-btn-shadow); }
.hdc-btn[disabled], .hdc-btn.is-disabled { opacity: .5; pointer-events: none; }
.hdc-btn .hdc-i { --hdc-i: 1.15em; }
.hdc-btn .hdc-btn__arrow { transition: transform var(--hdc-dur-2) var(--hdc-ease); }
.hdc-btn:hover .hdc-btn__arrow { transform: translateX(3px); }
[dir="rtl"] .hdc-btn .hdc-btn__arrow { transform: scaleX(-1); }
[dir="rtl"] .hdc-btn:hover .hdc-btn__arrow { transform: scaleX(-1) translateX(3px); }

.hdc-btn--secondary {
  --hdc-btn-bg: var(--hdc-surface);
  --hdc-btn-fg: var(--hdc-heading);
  --hdc-btn-bd: var(--hdc-border-strong);
  --hdc-btn-bg-hover: var(--hdc-surface-hover);
  --hdc-btn-shadow: var(--hdc-shadow-xs);
}
.hdc-btn--soft {
  --hdc-btn-bg: var(--hdc-primary-soft);
  --hdc-btn-fg: var(--hdc-primary-text);
  --hdc-btn-bg-hover: var(--hdc-primary-soft-2);
  --hdc-btn-shadow: 0 0 #0000;
}
.hdc-btn--ghost {
  --hdc-btn-bg: transparent;
  --hdc-btn-fg: var(--hdc-text);
  --hdc-btn-bg-hover: var(--hdc-bg-muted);
  --hdc-btn-fg-hover: var(--hdc-heading);
  --hdc-btn-shadow: 0 0 #0000;
}
.hdc-btn--ink {
  --hdc-btn-bg: var(--hdc-heading);
  --hdc-btn-fg: var(--hdc-bg);
  --hdc-btn-bg-hover: var(--hdc-text);
}
.hdc-btn--white {
  --hdc-btn-bg: #ffffff;
  --hdc-btn-fg: var(--hdc-blue-800);
  --hdc-btn-bg-hover: var(--hdc-blue-50);
  --hdc-btn-fg-hover: var(--hdc-blue-900);
}
.hdc-btn--outline-white {
  --hdc-btn-bg: transparent;
  --hdc-btn-fg: #ffffff;
  --hdc-btn-bd: rgba(255, 255, 255, .45);
  --hdc-btn-bg-hover: rgba(255, 255, 255, .1);
  --hdc-btn-shadow: 0 0 #0000;
}
.hdc-btn--success { --hdc-btn-bg: var(--hdc-green-600); --hdc-btn-bg-hover: var(--hdc-green-700); }
.hdc-btn--danger { --hdc-btn-bg: var(--hdc-red-600); --hdc-btn-bg-hover: var(--hdc-red-700); }
.hdc-btn--link {
  --hdc-btn-bg: transparent;
  --hdc-btn-bg-hover: transparent;
  --hdc-btn-fg: var(--hdc-link);
  --hdc-btn-fg-hover: var(--hdc-link-hover);
  --hdc-btn-px: 0;
  --hdc-btn-shadow: 0 0 #0000;
  min-height: auto;
}

.hdc-btn--sm { --hdc-btn-h: 36px; --hdc-btn-px: .85rem; font-size: var(--hdc-fs-sm); border-radius: var(--hdc-r-xs); }
.hdc-btn--lg { --hdc-btn-h: 52px; --hdc-btn-px: 1.5rem; font-size: 1rem; border-radius: var(--hdc-r-md); }
.hdc-btn--xl { --hdc-btn-h: 58px; --hdc-btn-px: 1.85rem; font-size: 1.0625rem; border-radius: var(--hdc-r-md); }
.hdc-btn--block { display: flex; width: 100%; }
.hdc-btn--icon { --hdc-btn-px: 0; width: var(--hdc-btn-h); }
.hdc-btn.is-loading { color: transparent !important; pointer-events: none; }
.hdc-btn.is-loading::after {
  content: "";
  position: absolute;
  width: 1.1em; height: 1.1em;
  border: 2px solid currentColor;
  border-color: var(--hdc-btn-fg) transparent var(--hdc-btn-fg) transparent;
  border-radius: 50%;
  animation: hdc-spin .7s linear infinite;
}

/* ==========================================================================
   6. Badges, chips, LED, spec labels
   ========================================================================== */
.hdc-badge {
  --hdc-badge-bg: var(--hdc-bg-muted);
  --hdc-badge-fg: var(--hdc-text-2);
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  height: 24px;
  padding: 0 .6rem;
  border-radius: var(--hdc-r-pill);
  background: var(--hdc-badge-bg);
  color: var(--hdc-badge-fg);
  font-size: var(--hdc-fs-xs);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}
.hdc-badge .hdc-i { --hdc-i: 1em; }
.hdc-badge--primary { --hdc-badge-bg: var(--hdc-primary-soft); --hdc-badge-fg: var(--hdc-primary-text); }
.hdc-badge--success { --hdc-badge-bg: var(--hdc-success-soft); --hdc-badge-fg: var(--hdc-success-text); }
.hdc-badge--warning { --hdc-badge-bg: var(--hdc-warning-soft); --hdc-badge-fg: var(--hdc-warning-text); }
.hdc-badge--danger { --hdc-badge-bg: var(--hdc-danger-soft); --hdc-badge-fg: var(--hdc-danger-text); }
.hdc-badge--ai { --hdc-badge-bg: var(--hdc-ai-soft); --hdc-badge-fg: var(--hdc-ai); }
.hdc-badge--solid { --hdc-badge-bg: var(--hdc-primary-fill); --hdc-badge-fg: var(--hdc-on-primary); }
.hdc-badge--ink { --hdc-badge-bg: var(--hdc-heading); --hdc-badge-fg: var(--hdc-bg); }
.hdc-badge--outline { --hdc-badge-bg: transparent; box-shadow: inset 0 0 0 1px var(--hdc-border-strong); }
.hdc-badge--lg { height: 30px; padding: 0 .85rem; font-size: var(--hdc-fs-sm); }

.hdc-led {
  position: relative;
  display: inline-block;
  width: 8px; height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--hdc-led);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--hdc-led) 22%, transparent);
}
.hdc-led--pulse::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: inherit;
  animation: hdc-ping 2s var(--hdc-ease) infinite;
}
.hdc-led--warning { --hdc-led: var(--hdc-warning); }
.hdc-led--danger { --hdc-led: var(--hdc-danger); }
.hdc-led--idle { --hdc-led: var(--hdc-text-3); }

.hdc-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
  color: var(--hdc-primary-text);
  font-family: var(--hdc-font-mono);
  font-size: var(--hdc-fs-xs);
  font-weight: 600;
  letter-spacing: var(--hdc-tracking-label);
  text-transform: uppercase;
}
.hdc-eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  opacity: .7;
}
.hdc-eyebrow--plain::before { display: none; }

/* Hardware/spec value in monospace, e.g. "4 vCPU" */
.hdc-spec {
  font-family: var(--hdc-font-mono);
  font-size: .9em;
  font-weight: 500;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
}
.hdc-spec b, .hdc-spec strong { color: var(--hdc-heading); font-weight: 700; }

.hdc-kbd {
  display: inline-block;
  min-width: 1.5em;
  padding: .1em .4em;
  border: 1px solid var(--hdc-border-strong);
  border-bottom-width: 2px;
  border-radius: var(--hdc-r-xs);
  background: var(--hdc-surface);
  font: 500 var(--hdc-fs-xs)/1.4 var(--hdc-font-mono);
  text-align: center;
}

/* ==========================================================================
   7. Cards & surfaces
   ========================================================================== */
.hdc-card {
  position: relative;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-lg);
  background: var(--hdc-surface);
  box-shadow: var(--hdc-shadow-xs);
}
.hdc-card__body { padding: clamp(1.15rem, .9rem + 1vw, 1.75rem); }
.hdc-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1.15rem, .9rem + 1vw, 1.75rem);
  border-bottom: 1px solid var(--hdc-border);
}
.hdc-card__header h2, .hdc-card__header h3 { margin: 0; font-size: var(--hdc-fs-lg); letter-spacing: -.01em; }
.hdc-card__footer {
  padding: 1rem clamp(1.15rem, .9rem + 1vw, 1.75rem);
  border-top: 1px solid var(--hdc-border);
  background: var(--hdc-surface-sunken);
  border-radius: 0 0 var(--hdc-r-lg) var(--hdc-r-lg);
}
.hdc-card--interactive {
  transition: transform var(--hdc-dur-2) var(--hdc-ease), box-shadow var(--hdc-dur-2) var(--hdc-ease), border-color var(--hdc-dur-2) var(--hdc-ease);
}
.hdc-card--interactive:hover {
  transform: translateY(-3px);
  border-color: var(--hdc-border-strong);
  box-shadow: var(--hdc-shadow-md);
}
.hdc-card--flat { box-shadow: none; }
.hdc-card--sunken { background: var(--hdc-surface-sunken); box-shadow: none; }
.hdc-card a.hdc-card__cover-link::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }

/* ==========================================================================
   8. Forms
   ========================================================================== */
.hdc-field { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1rem; }
.hdc-label { color: var(--hdc-heading); font-size: var(--hdc-fs-sm); font-weight: 600; }
.hdc-label .hdc-req { color: var(--hdc-danger); margin-inline-start: .15rem; }
.hdc-help { color: var(--hdc-text-3); font-size: var(--hdc-fs-xs); }
.hdc-error { color: var(--hdc-danger-text); font-size: var(--hdc-fs-xs); font-weight: 500; }

.hdc-input, .hdc-select, .hdc-textarea {
  width: 100%;
  min-height: 44px;
  padding: .6rem .85rem;
  border: 1px solid var(--hdc-border-input);
  border-radius: var(--hdc-r-sm);
  background: var(--hdc-surface);
  color: var(--hdc-heading);
  font: 400 var(--hdc-fs-base)/1.4 var(--hdc-font-sans);
  box-shadow: var(--hdc-shadow-xs);
  transition: border-color var(--hdc-dur-1) var(--hdc-ease), box-shadow var(--hdc-dur-1) var(--hdc-ease);
  appearance: none;
}
.hdc-input::placeholder, .hdc-textarea::placeholder { color: var(--hdc-text-3); }
.hdc-input:hover, .hdc-select:hover, .hdc-textarea:hover { border-color: var(--hdc-gray-400); }
.hdc-input:focus, .hdc-select:focus, .hdc-textarea:focus {
  outline: none;
  border-color: var(--hdc-primary);
  box-shadow: var(--hdc-focus-ring);
}
.hdc-input[aria-invalid="true"], .hdc-input.is-invalid { border-color: var(--hdc-danger); }
.hdc-input:disabled, .hdc-select:disabled { background: var(--hdc-bg-muted); color: var(--hdc-text-3); cursor: not-allowed; }
.hdc-textarea { min-height: 120px; resize: vertical; }
.hdc-select {
  padding-inline-end: 2.4rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2366768b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  background-size: 16px;
}
[dir="rtl"] .hdc-select { background-position: left .75rem center; }
.hdc-input--lg { min-height: 54px; font-size: var(--hdc-fs-md); padding-inline: 1.1rem; border-radius: var(--hdc-r-md); }

.hdc-input-group { display: flex; align-items: stretch; }
.hdc-input-group > .hdc-input { flex: 1 1 auto; min-width: 0; }
.hdc-input-group > :not(:first-child) { margin-inline-start: -1px; border-start-start-radius: 0; border-end-start-radius: 0; }
.hdc-input-group > :not(:last-child) { border-start-end-radius: 0; border-end-end-radius: 0; }
.hdc-input-addon {
  display: inline-flex;
  align-items: center;
  padding: 0 .85rem;
  border: 1px solid var(--hdc-border-input);
  background: var(--hdc-bg-soft);
  color: var(--hdc-text-2);
  font-size: var(--hdc-fs-sm);
  border-radius: var(--hdc-r-sm);
}

.hdc-check {
  display: inline-flex;
  align-items: flex-start;
  gap: .6rem;
  cursor: pointer;
  font-size: var(--hdc-fs-sm);
  color: var(--hdc-text);
}
.hdc-check input[type="checkbox"], .hdc-check input[type="radio"],
input.hdc-checkbox, input.hdc-radio {
  appearance: none;
  flex: 0 0 auto;
  width: 18px; height: 18px;
  margin: .12rem 0 0;
  border: 1.5px solid var(--hdc-border-input);
  border-radius: 5px;
  background: var(--hdc-surface) center/12px no-repeat;
  cursor: pointer;
  transition: background-color var(--hdc-dur-1), border-color var(--hdc-dur-1), box-shadow var(--hdc-dur-1);
}
.hdc-check input[type="radio"], input.hdc-radio { border-radius: 50%; }
.hdc-check input:checked, input.hdc-checkbox:checked, input.hdc-radio:checked {
  border-color: var(--hdc-primary);
  background-color: var(--hdc-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12.5 4.5 4.5L19 7.5'/%3E%3C/svg%3E");
}
.hdc-check input[type="radio"]:checked, input.hdc-radio:checked {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='5' fill='white'/%3E%3C/svg%3E");
}
.hdc-check input:focus-visible { outline: none; box-shadow: var(--hdc-focus-ring); }

.hdc-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  cursor: pointer;
  font-size: var(--hdc-fs-sm);
}
.hdc-switch input {
  appearance: none;
  width: 40px; height: 22px;
  margin: 0;
  border-radius: var(--hdc-r-pill);
  background: var(--hdc-gray-300);
  cursor: pointer;
  transition: background-color var(--hdc-dur-2) var(--hdc-ease);
  position: relative;
}
.hdc-switch input::after {
  content: "";
  position: absolute;
  top: 3px; inset-inline-start: 3px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
  transition: transform var(--hdc-dur-2) var(--hdc-ease-spring);
}
.hdc-switch input:checked { background: var(--hdc-primary); }
.hdc-switch input:checked::after { transform: translateX(18px); }
[dir="rtl"] .hdc-switch input:checked::after { transform: translateX(-18px); }
.hdc-switch input:focus-visible { outline: none; box-shadow: var(--hdc-focus-ring); }

/* Segmented control — billing cycle switcher, tabs-lite */
.hdc-segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-pill);
  background: var(--hdc-bg-soft);
}
.hdc-segmented__btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  min-height: 38px;
  padding: 0 1rem;
  border: 0;
  border-radius: var(--hdc-r-pill);
  background: transparent;
  color: var(--hdc-text-2);
  font: 600 var(--hdc-fs-sm)/1 var(--hdc-font-sans);
  cursor: pointer;
  transition: color var(--hdc-dur-1), background-color var(--hdc-dur-2) var(--hdc-ease), box-shadow var(--hdc-dur-2);
}
.hdc-segmented__btn:hover { color: var(--hdc-heading); }
.hdc-segmented__btn[aria-pressed="true"], .hdc-segmented__btn.is-active {
  background: var(--hdc-surface);
  color: var(--hdc-heading);
  box-shadow: var(--hdc-shadow-sm);
}
.hdc-segmented__save {
  padding: .2rem .45rem;
  border-radius: var(--hdc-r-pill);
  background: var(--hdc-success-soft);
  color: var(--hdc-success-text);
  font-size: var(--hdc-fs-2xs);
  font-weight: 700;
}

/* ==========================================================================
   9. Alerts
   ========================================================================== */
.hdc-alert {
  --hdc-alert-bg: var(--hdc-info-soft);
  --hdc-alert-fg: var(--hdc-info-text);
  --hdc-alert-bd: color-mix(in srgb, var(--hdc-info) 22%, transparent);
  display: flex;
  gap: .75rem;
  padding: .9rem 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--hdc-alert-bd);
  border-radius: var(--hdc-r-md);
  background: var(--hdc-alert-bg);
  color: var(--hdc-alert-fg);
  font-size: var(--hdc-fs-sm);
}
.hdc-alert > .hdc-i { margin-top: .1rem; }
.hdc-alert a { color: inherit; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.hdc-alert--success { --hdc-alert-bg: var(--hdc-success-soft); --hdc-alert-fg: var(--hdc-success-text); --hdc-alert-bd: color-mix(in srgb, var(--hdc-success) 24%, transparent); }
.hdc-alert--warning { --hdc-alert-bg: var(--hdc-warning-soft); --hdc-alert-fg: var(--hdc-warning-text); --hdc-alert-bd: color-mix(in srgb, var(--hdc-warning) 30%, transparent); }
.hdc-alert--danger { --hdc-alert-bg: var(--hdc-danger-soft); --hdc-alert-fg: var(--hdc-danger-text); --hdc-alert-bd: color-mix(in srgb, var(--hdc-danger) 24%, transparent); }

/* ==========================================================================
   10. Tables
   ========================================================================== */
.hdc-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-lg);
  background: var(--hdc-surface);
}
.hdc-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--hdc-fs-sm);
}
.hdc-table th, .hdc-table td {
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--hdc-border);
  text-align: start;
  vertical-align: middle;
}
.hdc-table thead th {
  position: sticky;
  top: 0;
  background: var(--hdc-surface-sunken);
  color: var(--hdc-text-3);
  font-size: var(--hdc-fs-xs);
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.hdc-table tbody tr { transition: background-color var(--hdc-dur-1); }
.hdc-table tbody tr:hover { background: var(--hdc-surface-hover); }
.hdc-table tbody tr:last-child td { border-bottom: 0; }
.hdc-table td.num, .hdc-table th.num { text-align: end; font-variant-numeric: tabular-nums; }
.hdc-table--clickable tbody tr { cursor: pointer; }

/* ==========================================================================
   11. Disclosure (FAQ/accordion), tabs
   ========================================================================== */
.hdc-accordion { display: flex; flex-direction: column; gap: .75rem; }
.hdc-accordion details {
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-md);
  background: var(--hdc-surface);
  transition: border-color var(--hdc-dur-2), box-shadow var(--hdc-dur-2);
}
.hdc-accordion details[open] { border-color: var(--hdc-border-strong); box-shadow: var(--hdc-shadow-sm); }
.hdc-accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  color: var(--hdc-heading);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.hdc-accordion summary::-webkit-details-marker { display: none; }
.hdc-accordion summary::after {
  content: "";
  flex: 0 0 auto;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--hdc-bg-muted) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2366768b' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M12 6v12M6 12h12'/%3E%3C/svg%3E") center/12px no-repeat;
  transition: transform var(--hdc-dur-2) var(--hdc-ease);
}
.hdc-accordion details[open] summary::after { transform: rotate(45deg); }
.hdc-accordion__body { padding: 0 1.25rem 1.2rem; color: var(--hdc-text-2); }
.hdc-accordion__body > :last-child { margin-bottom: 0; }

.hdc-tabs { display: flex; gap: .25rem; overflow-x: auto; border-bottom: 1px solid var(--hdc-border); scrollbar-width: none; }
.hdc-tabs::-webkit-scrollbar { display: none; }
.hdc-tab {
  position: relative;
  padding: .85rem 1rem;
  border: 0;
  background: none;
  color: var(--hdc-text-2);
  font: 600 var(--hdc-fs-sm)/1 var(--hdc-font-sans);
  white-space: nowrap;
  cursor: pointer;
}
.hdc-tab:hover { color: var(--hdc-heading); }
.hdc-tab[aria-selected="true"] { color: var(--hdc-primary-text); }
.hdc-tab[aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset-inline: .75rem;
  bottom: -1px;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: var(--hdc-primary);
}
.hdc-tabpanel[hidden] { display: none; }

/* ==========================================================================
   12. Overlays: dialog, popover, tooltip, toast
   ========================================================================== */
dialog.hdc-dialog {
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-xl);
  background: var(--hdc-surface-raised);
  color: var(--hdc-text);
  box-shadow: var(--hdc-shadow-lg);
  overflow: auto;
}
dialog.hdc-dialog::backdrop { background: var(--hdc-overlay); backdrop-filter: blur(3px); }
dialog.hdc-dialog[open] { animation: hdc-pop var(--hdc-dur-3) var(--hdc-ease); }
.hdc-dialog--lg { width: min(860px, calc(100vw - 32px)) !important; }
.hdc-dialog__header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--hdc-border); }
.hdc-dialog__header h2 { margin: 0; font-size: var(--hdc-fs-lg); }
.hdc-dialog__body { padding: 1.5rem; }
.hdc-dialog__footer { display: flex; justify-content: flex-end; gap: .5rem; padding: 1rem 1.5rem; border-top: 1px solid var(--hdc-border); background: var(--hdc-surface-sunken); }

.hdc-popover {
  position: absolute;
  z-index: 1060;
  max-width: 320px;
  padding: .85rem 1rem;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-md);
  background: var(--hdc-surface-raised);
  color: var(--hdc-text);
  font-size: var(--hdc-fs-sm);
  box-shadow: var(--hdc-shadow-md);
  animation: hdc-fade var(--hdc-dur-2) var(--hdc-ease);
}
.hdc-popover__title { margin-bottom: .35rem; color: var(--hdc-heading); font-weight: 650; }

/*
  Tooltip bubble. It is generated only while shown: a transparent-but-laid-out bubble near the viewport
  edge still counts as scrollable overflow and widens the page on phones.
  data-hdc-tip-align="start|end" pins it to that edge of the trigger (use for triggers near a container edge).
*/
[data-hdc-tip] { position: relative; --hdc-tip-x: -50%; }
[data-hdc-tip]:not([data-hdc-tip=""]):hover::after, [data-hdc-tip]:not([data-hdc-tip=""]):focus-visible::after {
  content: attr(data-hdc-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  z-index: 50;
  width: max-content;
  max-width: min(260px, calc(100vw - 2rem));
  padding: .45rem .65rem;
  border-radius: var(--hdc-r-sm);
  background: var(--hdc-gray-900);
  color: #fff;
  font-size: var(--hdc-fs-xs);
  font-weight: 500;
  line-height: 1.4;
  white-space: normal;
  text-align: center;
  transform: translate(var(--hdc-tip-x), 0);
  pointer-events: none;
  animation: hdc-tip-in var(--hdc-dur-2) var(--hdc-ease);
}
[data-hdc-tip-align="start"], [data-hdc-tip-align="end"] { --hdc-tip-x: 0; }
[data-hdc-tip-align="start"]:hover::after, [data-hdc-tip-align="start"]:focus-visible::after { left: auto; right: auto; inset-inline-start: 0; }
[data-hdc-tip-align="end"]:hover::after, [data-hdc-tip-align="end"]:focus-visible::after { left: auto; right: auto; inset-inline-end: 0; }
@media (prefers-reduced-motion: reduce) { [data-hdc-tip]:not([data-hdc-tip=""]):hover::after, [data-hdc-tip]:not([data-hdc-tip=""]):focus-visible::after { animation: none; } }

.hdc-toasts {
  position: fixed;
  inset-inline-end: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  z-index: 1080;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  width: min(380px, calc(100vw - 32px));
}
.hdc-toast {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  padding: .85rem 1rem;
  border: 1px solid var(--hdc-border);
  border-radius: var(--hdc-r-md);
  background: var(--hdc-surface-raised);
  color: var(--hdc-text);
  font-size: var(--hdc-fs-sm);
  box-shadow: var(--hdc-shadow-lg);
  animation: hdc-slide-up var(--hdc-dur-3) var(--hdc-ease);
}

/* ==========================================================================
   13. Feedback: skeleton, spinner, progress
   ========================================================================== */
.hdc-skeleton {
  border-radius: var(--hdc-r-sm);
  background: linear-gradient(90deg, var(--hdc-bg-muted) 0%, var(--hdc-bg-soft) 50%, var(--hdc-bg-muted) 100%);
  background-size: 200% 100%;
  animation: hdc-shimmer 1.4s linear infinite;
}
.hdc-spinner {
  display: inline-block;
  width: 1.25em; height: 1.25em;
  border: 2px solid var(--hdc-border-strong);
  border-top-color: var(--hdc-primary);
  border-radius: 50%;
  animation: hdc-spin .7s linear infinite;
}
.hdc-progress {
  height: 8px;
  overflow: hidden;
  border-radius: var(--hdc-r-pill);
  background: var(--hdc-bg-muted);
}
.hdc-progress > span {
  display: block;
  height: 100%;
  width: var(--hdc-value, 0%);
  border-radius: inherit;
  background: var(--hdc-primary);
  transition: width var(--hdc-dur-3) var(--hdc-ease);
}
.hdc-progress--success > span { background: var(--hdc-success); }
.hdc-progress--warning > span { background: var(--hdc-warning); }
.hdc-progress--danger > span { background: var(--hdc-danger); }

/* ==========================================================================
   14. Prose (rich text from the builder / KB / announcements)
   ========================================================================== */
.hdc-prose { color: var(--hdc-text); font-size: var(--hdc-fs-md); line-height: 1.72; max-width: 72ch; }
.hdc-prose > * + * { margin-top: 1.1em; }
.hdc-prose h2 { margin-top: 2em; font-size: 1.6rem; }
.hdc-prose h3 { margin-top: 1.6em; font-size: 1.25rem; }
.hdc-prose ul, .hdc-prose ol { padding-inline-start: 1.4em; }
.hdc-prose li + li { margin-top: .4em; }
.hdc-prose li::marker { color: var(--hdc-primary); }
.hdc-prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.hdc-prose blockquote {
  margin-inline: 0;
  padding: .25rem 0 .25rem 1.25rem;
  border-inline-start: 3px solid var(--hdc-primary);
  color: var(--hdc-text-2);
}
.hdc-prose table { width: 100%; border-collapse: collapse; font-size: var(--hdc-fs-sm); }
.hdc-prose th, .hdc-prose td { padding: .6rem .75rem; border: 1px solid var(--hdc-border); text-align: start; }
.hdc-prose th { background: var(--hdc-bg-soft); color: var(--hdc-heading); }
.hdc-prose img { border-radius: var(--hdc-r-md); }

/* ==========================================================================
   15. Utilities (kept intentionally small)
   ========================================================================== */
.hdc-text-center { text-align: center; }
.hdc-text-end { text-align: end; }
.hdc-muted { color: var(--hdc-text-3) !important; }
.hdc-text-2 { color: var(--hdc-text-2) !important; }
.hdc-heading-color { color: var(--hdc-heading) !important; }
.hdc-primary-color { color: var(--hdc-primary-text) !important; }
.hdc-success-color { color: var(--hdc-success-text) !important; }
.hdc-danger-color { color: var(--hdc-danger-text) !important; }
.hdc-nowrap { white-space: nowrap; }
.hdc-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.hdc-mt-0 { margin-top: 0 !important; }
.hdc-mb-0 { margin-bottom: 0 !important; }
.hdc-w-full { width: 100%; }
.hdc-hide-sm { display: none !important; }
@media (min-width: 768px) { .hdc-hide-sm { display: revert !important; } .hdc-show-sm { display: none !important; } }
@media (max-width: 1023.98px) { .hdc-hide-md-down { display: none !important; } }
@media (min-width: 1024px) { .hdc-show-md-down { display: none !important; } }

/* Reveal-on-scroll: visible by default; JS adds .hdc-anim only when motion is allowed */
.hdc-anim [data-hdc-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--hdc-ease), transform .6s var(--hdc-ease); }
.hdc-anim [data-hdc-reveal].is-in { opacity: 1; transform: none; }

/* ==========================================================================
   16. Keyframes & motion preferences
   ========================================================================== */
@keyframes hdc-spin { to { transform: rotate(360deg); } }
@keyframes hdc-ping { 0% { transform: scale(1); opacity: .65; } 80%, 100% { transform: scale(2.6); opacity: 0; } }
@keyframes hdc-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes hdc-tip-in { from { opacity: 0; transform: translate(var(--hdc-tip-x), 4px); } to { opacity: 1; transform: translate(var(--hdc-tip-x), 0); } }
@keyframes hdc-pop { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }
@keyframes hdc-slide-up { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes hdc-shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

@media print {
  .hdc-header, .hdc-footer, .hdc-announce, .hdc-toasts, .hdc-no-print { display: none !important; }
  body.hdc { background: #fff; color: #000; }
}