/* ============================================================================
   apple-hig.css — Galactic Empire Apple-compliant design system
   ----------------------------------------------------------------------------
   A single, drop-in stylesheet that encodes Apple's Human Interface Guidelines
   (iOS / iPadOS / macOS 26 "Tahoe", Liquid Glass era, 2025–2026) as web tokens
   and components. Link this file, set `data-theme="light|dark"` (or rely on the
   system), and build with the .x-* classes / var(--*) tokens below.

   This is the "design language" the apple-ui-designer agent reuses across every
   mockup. Values are sourced from Apple HIG; web can only approximate native
   materials, so Liquid Glass is rendered with layered translucency + blur.

   Sections:
     1. Design tokens — color (system + semantic), light & dark
     2. Typography tokens (Dynamic Type scale)
     3. Spacing / radius / elevation tokens (8pt grid)
     4. Reset + base
     5. Materials — Liquid Glass utilities
     6. Components — buttons, cards, lists, nav, tab bar, sidebar, fields…
     7. Accessibility — reduced motion / transparency / contrast / focus
   ============================================================================ */

/* ============================ 1. COLOR TOKENS ============================== */
:root,
[data-theme="light"] {
  color-scheme: light;

  /* — System colors (iOS, light) — */
  --sys-red:    #FF3B30;  --sys-orange: #FF9500;  --sys-yellow: #FFCC00;
  --sys-green:  #34C759;  --sys-mint:   #00C7BE;  --sys-teal:   #30B0C7;
  --sys-cyan:   #32ADE6;  --sys-blue:   #007AFF;  --sys-indigo: #5856D6;
  --sys-purple: #AF52DE;  --sys-pink:   #FF2D55;  --sys-brown:  #A2845E;

  --sys-gray:   #8E8E93;  --sys-gray2:  #AEAEB2;  --sys-gray3:  #C7C7CC;
  --sys-gray4:  #D1D1D6;  --sys-gray5:  #E5E5EA;  --sys-gray6:  #F2F2F7;

  /* — Semantic: labels (text) — */
  --label:            rgba(0, 0, 0, 1);
  --label-secondary:  rgba(60, 60, 67, 0.60);
  --label-tertiary:   rgba(60, 60, 67, 0.30);
  --label-quaternary: rgba(60, 60, 67, 0.18);
  --placeholder-text: rgba(60, 60, 67, 0.30);

  /* — Semantic: separators — */
  --separator:        rgba(60, 60, 67, 0.29);
  --separator-opaque: #C6C6C8;

  /* — Semantic: fills (controls / chips) — */
  --fill:            rgba(120, 120, 128, 0.20);
  --fill-secondary:  rgba(120, 120, 128, 0.16);
  --fill-tertiary:   rgba(118, 118, 128, 0.12);
  --fill-quaternary: rgba(116, 116, 128, 0.08);

  /* — Semantic: backgrounds (base, app chrome) — */
  --bg:            #FFFFFF;
  --bg-secondary:  #F2F2F7;
  --bg-tertiary:   #FFFFFF;

  /* — Semantic: grouped backgrounds (settings-style lists) — */
  --bg-grouped:           #F2F2F7;
  --bg-grouped-secondary: #FFFFFF;
  --bg-grouped-tertiary:  #F2F2F7;

  /* — Tint / accent — */
  --tint: var(--sys-blue);
  --on-tint: #FFFFFF;

  /* — Material surface base (Liquid Glass renders over this) — */
  --glass-bg:        rgba(255, 255, 255, 0.62);
  --glass-bg-thin:   rgba(255, 255, 255, 0.45);
  --glass-bg-thick:  rgba(255, 255, 255, 0.80);
  --glass-border:    rgba(255, 255, 255, 0.50);
  --glass-shadow:    rgba(0, 0, 0, 0.12);

  /* — Ambient backdrop used by full-screen mockups (subtle, Apple-like) — */
  --ambient: radial-gradient(120% 120% at 0% 0%, #eaf3ff 0%, #f3f0ff 38%, #f7f7fb 70%, #f2f2f7 100%);
}

[data-theme="dark"] {
  color-scheme: dark;

  --sys-red:    #FF453A;  --sys-orange: #FF9F0A;  --sys-yellow: #FFD60A;
  --sys-green:  #30D158;  --sys-mint:   #63E6E2;  --sys-teal:   #40C8E0;
  --sys-cyan:   #64D2FF;  --sys-blue:   #0A84FF;  --sys-indigo: #5E5CE6;
  --sys-purple: #BF5AF2;  --sys-pink:   #FF375F;  --sys-brown:  #AC8E68;

  --sys-gray:   #8E8E93;  --sys-gray2:  #636366;  --sys-gray3:  #48484A;
  --sys-gray4:  #3A3A3C;  --sys-gray5:  #2C2C2E;  --sys-gray6:  #1C1C1E;

  --label:            rgba(255, 255, 255, 1);
  --label-secondary:  rgba(235, 235, 245, 0.60);
  --label-tertiary:   rgba(235, 235, 245, 0.30);
  --label-quaternary: rgba(235, 235, 245, 0.16);
  --placeholder-text: rgba(235, 235, 245, 0.30);

  --separator:        rgba(84, 84, 88, 0.60);
  --separator-opaque: #38383A;

  --fill:            rgba(120, 120, 128, 0.36);
  --fill-secondary:  rgba(120, 120, 128, 0.32);
  --fill-tertiary:   rgba(118, 118, 128, 0.24);
  --fill-quaternary: rgba(118, 118, 128, 0.18);

  --bg:            #000000;
  --bg-secondary:  #1C1C1E;
  --bg-tertiary:   #2C2C2E;

  --bg-grouped:           #000000;
  --bg-grouped-secondary: #1C1C1E;
  --bg-grouped-tertiary:  #2C2C2E;

  --tint: var(--sys-blue);
  --on-tint: #FFFFFF;

  --glass-bg:        rgba(40, 40, 45, 0.55);
  --glass-bg-thin:   rgba(40, 40, 45, 0.38);
  --glass-bg-thick:  rgba(28, 28, 32, 0.78);
  --glass-border:    rgba(255, 255, 255, 0.12);
  --glass-shadow:    rgba(0, 0, 0, 0.45);

  --ambient: radial-gradient(120% 120% at 0% 0%, #0a1830 0%, #16102a 40%, #0c0c10 72%, #000000 100%);
}

/* Honour the OS preference when no explicit data-theme is set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --sys-red:#FF453A;--sys-orange:#FF9F0A;--sys-yellow:#FFD60A;--sys-green:#30D158;
    --sys-mint:#63E6E2;--sys-teal:#40C8E0;--sys-cyan:#64D2FF;--sys-blue:#0A84FF;
    --sys-indigo:#5E5CE6;--sys-purple:#BF5AF2;--sys-pink:#FF375F;--sys-brown:#AC8E68;
    --sys-gray:#8E8E93;--sys-gray2:#636366;--sys-gray3:#48484A;--sys-gray4:#3A3A3C;
    --sys-gray5:#2C2C2E;--sys-gray6:#1C1C1E;
    --label:rgba(255,255,255,1);--label-secondary:rgba(235,235,245,.6);
    --label-tertiary:rgba(235,235,245,.3);--label-quaternary:rgba(235,235,245,.16);
    --placeholder-text:rgba(235,235,245,.3);--separator:rgba(84,84,88,.6);
    --separator-opaque:#38383A;--fill:rgba(120,120,128,.36);--fill-secondary:rgba(120,120,128,.32);
    --fill-tertiary:rgba(118,118,128,.24);--fill-quaternary:rgba(118,118,128,.18);
    --bg:#000;--bg-secondary:#1C1C1E;--bg-tertiary:#2C2C2E;--bg-grouped:#000;
    --bg-grouped-secondary:#1C1C1E;--bg-grouped-tertiary:#2C2C2E;--on-tint:#fff;
    --glass-bg:rgba(40,40,45,.55);--glass-bg-thin:rgba(40,40,45,.38);
    --glass-bg-thick:rgba(28,28,32,.78);--glass-border:rgba(255,255,255,.12);
    --glass-shadow:rgba(0,0,0,.45);
    --ambient:radial-gradient(120% 120% at 0% 0%,#0a1830 0%,#16102a 40%,#0c0c10 72%,#000 100%);
  }
}

/* ========================== 2. TYPOGRAPHY TOKENS ========================== */
:root {
  /* Apple's system font stack. -apple-system pulls SF Pro on Apple OSes. */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
               "Helvetica Neue", "Inter", system-ui, sans-serif;
  --font-rounded: ui-rounded, "SF Pro Rounded", var(--font-sans);
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Menlo", monospace;
  --font-serif: ui-serif, "New York", Georgia, serif;

  /* Dynamic Type scale @ default (Large) content size: size / line-height / weight */
  --t-large-title:   34px;  --lh-large-title:   41px;  --w-large-title:   700;
  --t-title1:        28px;  --lh-title1:        34px;  --w-title1:        700;
  --t-title2:        22px;  --lh-title2:        28px;  --w-title2:        700;
  --t-title3:        20px;  --lh-title3:        25px;  --w-title3:        600;
  --t-headline:      17px;  --lh-headline:      22px;  --w-headline:      600;
  --t-body:          17px;  --lh-body:          22px;  --w-body:          400;
  --t-callout:       16px;  --lh-callout:       21px;  --w-callout:       400;
  --t-subheadline:   15px;  --lh-subheadline:   20px;  --w-subheadline:   400;
  --t-footnote:      13px;  --lh-footnote:      18px;  --w-footnote:      400;
  --t-caption1:      12px;  --lh-caption1:      16px;  --w-caption1:      400;
  --t-caption2:      11px;  --lh-caption2:      13px;  --w-caption2:      400;
}

.x-large-title { font: var(--w-large-title) var(--t-large-title)/var(--lh-large-title) var(--font-sans); letter-spacing: .37px; }
.x-title1      { font: var(--w-title1) var(--t-title1)/var(--lh-title1) var(--font-sans); letter-spacing: .36px; }
.x-title2      { font: var(--w-title2) var(--t-title2)/var(--lh-title2) var(--font-sans); letter-spacing: .35px; }
.x-title3      { font: var(--w-title3) var(--t-title3)/var(--lh-title3) var(--font-sans); }
.x-headline    { font: var(--w-headline) var(--t-headline)/var(--lh-headline) var(--font-sans); letter-spacing: -.43px; }
.x-body        { font: var(--w-body) var(--t-body)/var(--lh-body) var(--font-sans); letter-spacing: -.43px; }
.x-callout     { font: var(--w-callout) var(--t-callout)/var(--lh-callout) var(--font-sans); letter-spacing: -.32px; }
.x-subheadline { font: var(--w-subheadline) var(--t-subheadline)/var(--lh-subheadline) var(--font-sans); letter-spacing: -.24px; }
.x-footnote    { font: var(--w-footnote) var(--t-footnote)/var(--lh-footnote) var(--font-sans); letter-spacing: -.08px; }
.x-caption1    { font: var(--w-caption1) var(--t-caption1)/var(--lh-caption1) var(--font-sans); }
.x-caption2    { font: var(--w-caption2) var(--t-caption2)/var(--lh-caption2) var(--font-sans); letter-spacing: .07px; }

.x-mono { font-family: var(--font-mono); }
.x-rounded { font-family: var(--font-rounded); }

/* ===================== 3. SPACING / RADIUS / ELEVATION ==================== */
:root {
  /* 8pt grid with 4pt sub-steps */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px; --sp-5: 20px;
  --sp-6: 24px; --sp-8: 32px; --sp-10: 40px; --sp-12: 48px; --sp-16: 64px;

  /* Corner radii — Apple concentric scale */
  --r-xs: 6px;   --r-sm: 10px;  --r-md: 14px;  --r-lg: 20px;
  --r-xl: 28px;  --r-2xl: 38px; --r-pill: 999px;

  /* Continuous "squircle" corner smoothing where supported */
  --corner-smooth: 60%;

  /* Minimum hit target (44x44pt) */
  --hit: 44px;

  /* Layout margins */
  --margin-compact: 16px;   /* iPhone */
  --margin-regular: 20px;   /* iPad / wide */

  /* Elevation (use sparingly — Apple favors materials over heavy shadows) */
  --shadow-1: 0 1px 2px rgba(0,0,0,.06), 0 1px 1px rgba(0,0,0,.04);
  --shadow-2: 0 4px 12px rgba(0,0,0,.10), 0 1px 3px rgba(0,0,0,.06);
  --shadow-3: 0 12px 32px rgba(0,0,0,.16), 0 4px 10px rgba(0,0,0,.08);

  /* Motion — Apple-feel curves & durations */
  --ease-standard: cubic-bezier(.4, 0, .2, 1);
  --ease-out:      cubic-bezier(0, 0, .2, 1);
  --ease-in:       cubic-bezier(.4, 0, 1, 1);
  --ease-spring:   cubic-bezier(.2, .7, .2, 1); /* snappy ease-out, no overshoot */
  --dur-fast: .2s; --dur-base: .3s; --dur-slow: .45s;
}

/* ============================== 4. RESET + BASE =========================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  font: var(--w-body) var(--t-body)/var(--lh-body) var(--font-sans);
  letter-spacing: -.43px;
  color: var(--label);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
h1,h2,h3,h4,p,figure { margin: 0; }
a { color: var(--tint); text-decoration: none; }
img { max-width: 100%; display: block; }
::placeholder { color: var(--placeholder-text); }
:where(button, input, textarea, select) { font: inherit; letter-spacing: inherit; }

/* Momentum scroll + no rubber-band bleed, like native scroll views */
.x-scroll { overflow: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }

/* ===================== 5. MATERIALS — LIQUID GLASS ======================== */
/*
   Liquid Glass = translucent, blurred, specular-edged surface that adapts to
   content behind it. On the web we layer: backdrop blur + saturate + a soft
   inner highlight + thin border. Falls back to opaque on reduced-transparency.
*/
.x-glass,
.x-glass-thin,
.x-glass-thick {
  position: relative; isolation: isolate;
  -webkit-backdrop-filter: saturate(190%) brightness(1.06) blur(30px);
  backdrop-filter: saturate(190%) brightness(1.06) blur(30px);
  background: var(--glass-bg);
  border: .5px solid var(--glass-border);
  /* big soft float shadow + top specular highlight + bottom inner shade = depth */
  box-shadow:
    0 18px 50px -12px var(--glass-shadow),
    0 2px 8px rgba(0,0,0,.18),
    inset 0 1px 0 rgba(255,255,255,.45),
    inset 0 -1px 1px rgba(0,0,0,.10);
}
.x-glass-thin  { -webkit-backdrop-filter: saturate(170%) blur(16px); backdrop-filter: saturate(170%) blur(16px); background: var(--glass-bg-thin); }
.x-glass-thick { -webkit-backdrop-filter: saturate(200%) brightness(1.08) blur(44px); backdrop-filter: saturate(200%) brightness(1.08) blur(44px); background: var(--glass-bg-thick); }

/* Specular sheen across the top — the wet "liquid" look of Liquid Glass */
.x-glass::after,
.x-glass-thin::after,
.x-glass-thick::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: -1;
  background:
    radial-gradient(120% 80% at 30% -10%, rgba(255,255,255,.30), rgba(255,255,255,0) 55%),
    linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,0) 32%);
}
/* Bright hairline that catches light on the top edge */
.x-glass::before,
.x-glass-thick::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: -1;
  padding: .5px;
  background: linear-gradient(180deg, rgba(255,255,255,.7), rgba(255,255,255,.05) 28%, rgba(255,255,255,0));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}

.x-ambient { background: var(--ambient); background-attachment: fixed; }

/* Liquid Glass LENS — prawdziwa refrakcja krawędzi (efekt "podwójnej ściany" + chromatic aberration).
   Chromium-only. Wymaga w DOM: filtra #x-lens + mapy assets/lens-normal.png (patrz 04-materials-liquid-glass.md).
   Użycie: <button class="x-lens"> … </button> na okrągłym/zaokrąglonym elemencie nad treścią. */
.x-lens {
  position: relative; border: none; appearance: none; -webkit-appearance: none;
  background: rgba(255,255,255,.02);
  -webkit-backdrop-filter: saturate(112%);
  backdrop-filter: saturate(112%);
  /* ⚠️ PRAWDZIWA refrakcja: backdrop-filter:url(#svg) = NO-OP w Chromium (zdiagnozowane).
     Wymagane dziecko .refract (replika tła, JS-align) z filter:url(#x-lens) —
     wzorzec referencyjny: mockups/ge-player.html + recepta w 04-materials. */
  /* anatomia wg oficjalnego hero Apple (study/apple-reference/liquid-glass-hero.jpg):
     wnętrze CZYSTE 1:1; miękki cień; ciemna hairline na zewnątrz; jasna wewnątrz */
  box-shadow:
    0 22px 44px -20px rgba(0,0,0,.26),
    0 0 0 .5px rgba(0,0,0,.12),
    inset 0 0 0 .5px rgba(255,255,255,.35);
}
.x-lens::before { /* polerowany rant: ostre łuki światła (góra-lewo główny, dół-prawo wtórny) */
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: conic-gradient(from 0deg,
    rgba(255,255,255,0) 0deg 96deg, rgba(255,255,255,.75) 132deg, rgba(255,255,255,0) 168deg 252deg,
    rgba(255,255,255,.95) 300deg, rgba(255,255,255,.85) 330deg, rgba(255,255,255,0) 360deg);
  -webkit-mask: radial-gradient(closest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
  mask: radial-gradient(closest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
  filter: blur(.3px);
}
.x-lens::after { /* druga ścianka: cienki koncentryczny pierścień tuż przy rimie */
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; mix-blend-mode: screen;
  background: rgba(255,255,255,.45);
  -webkit-mask: radial-gradient(closest-side, transparent 83%, #000 85.5%, #000 87.5%, transparent 90%);
  mask: radial-gradient(closest-side, transparent 83%, #000 85.5%, #000 87.5%, transparent 90%);
}
/* WWDC219: „material illuminates from within… starting right under your fingertips" */
.x-lens:active {
  box-shadow:
    0 22px 44px -20px rgba(0,0,0,.26),
    0 0 0 .5px rgba(0,0,0,.12),
    inset 0 0 0 .5px rgba(255,255,255,.45),
    inset 0 0 26px rgba(255,255,255,.28);
}
/* WWDC219: większy element = „thicker material: deeper shadows, more pronounced lensing, softer scattering"
   Paruj z filtrem #x-lens-thick (wyższe scale + lekki feGaussianBlur). */
.x-lens--thick {
  -webkit-backdrop-filter: saturate(120%) blur(1.5px);
  backdrop-filter: saturate(120%) blur(1.5px); /* refrakcja → patrz wzorzec .refract */
  box-shadow:
    0 30px 60px -22px rgba(0,0,0,.34),
    0 0 0 .5px rgba(0,0,0,.13),
    inset 0 0 0 .5px rgba(255,255,255,.35);
}
/* WWDC219: tint = „range of tones mapped to content brightness underneath" — NIE płaski fill.
   soft-light mapuje ton na jasność tła; cienka alpha-warstwa daje hue. */
.x-glass-tinted { position: relative; }
.x-glass-tinted::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: -1;
  background: var(--x-tint, var(--tint)); mix-blend-mode: soft-light; opacity: .85;
}
.x-glass-tinted { background: color-mix(in srgb, var(--x-tint, var(--tint)) 22%, var(--glass-bg)); }
@media (prefers-reduced-transparency: reduce) {
  .x-lens, .x-lens--thick { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--bg-secondary); }
}

/* ============================= 6. COMPONENTS ============================== */

/* — Buttons — */
.x-btn {
  --_bg: var(--fill); --_fg: var(--tint);
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  min-height: var(--hit); padding: 0 var(--sp-4);
  border: none; border-radius: var(--r-pill);
  background: var(--_bg); color: var(--_fg);
  font: 600 var(--t-body)/1 var(--font-sans); letter-spacing: -.4px;
  cursor: pointer; user-select: none;
  transition: transform var(--dur-fast) var(--ease-spring),
              filter var(--dur-fast) var(--ease-standard),
              background var(--dur-fast) var(--ease-standard);
}
.x-btn:hover   { filter: brightness(1.05); }
.x-btn:active  { transform: scale(.96); filter: brightness(.94); }
.x-btn:disabled, .x-btn[aria-disabled="true"] { opacity: .4; pointer-events: none; }

.x-btn-filled   { --_bg: var(--tint); --_fg: var(--on-tint); }
.x-btn-tinted   { --_bg: color-mix(in srgb, var(--tint) 15%, transparent); --_fg: var(--tint); }
.x-btn-gray     { --_bg: var(--fill); --_fg: var(--label); }
.x-btn-plain    { --_bg: transparent; --_fg: var(--tint); min-height: auto; padding: var(--sp-1) var(--sp-2); }
.x-btn-glass    { background: var(--glass-bg); -webkit-backdrop-filter: blur(20px) saturate(180%); backdrop-filter: blur(20px) saturate(180%); color: var(--label); border: .5px solid var(--glass-border); }
.x-btn-sm { min-height: 34px; font-size: var(--t-subheadline); }

/* — Cards / grouped surfaces — */
.x-card {
  background: var(--bg-grouped-secondary);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  box-shadow: var(--shadow-1);
}

/* — Inset grouped list (Settings style) — */
.x-list {
  background: var(--bg-grouped-secondary);
  border-radius: var(--r-md);
  overflow: hidden;
}
.x-row {
  display: flex; align-items: center; gap: var(--sp-3);
  min-height: var(--hit); padding: var(--sp-3) var(--sp-4);
  position: relative;
}
.x-row + .x-row::before {
  content: ""; position: absolute; top: 0; left: var(--sp-4); right: 0;
  border-top: .5px solid var(--separator);
}
.x-row:hover { background: var(--fill-quaternary); }
.x-row__title { flex: 1; }
.x-row__value { color: var(--label-secondary); }
.x-row__chevron { color: var(--label-tertiary); }

/* — Navigation bar (top) — */
.x-navbar {
  display: flex; align-items: center; gap: var(--sp-3);
  min-height: 52px; padding: var(--sp-2) var(--sp-4);
  padding-top: max(var(--sp-2), env(safe-area-inset-top));
  position: sticky; top: 0; z-index: 20;
  border-bottom: .5px solid var(--separator);
}
.x-navbar__title { flex: 1; text-align: center; font: 600 var(--t-headline)/1 var(--font-sans); }

/* — Tab bar (bottom) — */
.x-tabbar {
  display: flex; justify-content: space-around; align-items: center;
  padding: var(--sp-2) var(--sp-2);
  padding-bottom: max(var(--sp-2), env(safe-area-inset-bottom));
  border-top: .5px solid var(--separator);
  position: sticky; bottom: 0; z-index: 20;
}
.x-tab {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  min-width: var(--hit); padding: var(--sp-1);
  color: var(--label-tertiary); cursor: pointer;
  font: 500 var(--t-caption2)/1.1 var(--font-sans);
}
.x-tab[aria-selected="true"] { color: var(--tint); }
.x-tab__icon { width: 26px; height: 26px; display: grid; place-items: center; font-size: 22px; }

/* — Sidebar (macOS / iPad) — */
.x-sidebar { padding: var(--sp-3); }
.x-sidebar-section { margin-bottom: var(--sp-5); }
.x-side-item {
  display: flex; align-items: center; gap: var(--sp-3);
  min-height: 36px; padding: 0 var(--sp-3); border-radius: var(--r-sm);
  color: var(--label); cursor: pointer; font: 500 var(--t-subheadline)/1 var(--font-sans);
}
.x-side-item:hover { background: var(--fill-quaternary); }
.x-side-item[aria-selected="true"] { background: color-mix(in srgb, var(--tint) 18%, transparent); color: var(--tint); }
.x-side-label { font: 600 var(--t-footnote)/1 var(--font-sans); color: var(--label-secondary); text-transform: uppercase; letter-spacing: .5px; margin: 0 var(--sp-3) var(--sp-2); }

/* — Segmented control — */
.x-segmented {
  display: inline-flex; padding: 2px; gap: 2px;
  background: var(--fill-tertiary); border-radius: var(--r-sm);
}
.x-seg {
  border: none; background: transparent; color: var(--label);
  min-height: 30px; padding: 0 var(--sp-3); border-radius: 8px; cursor: pointer;
  font: 500 var(--t-subheadline)/1 var(--font-sans);
  transition: background var(--dur-fast) var(--ease-standard);
}
.x-seg[aria-selected="true"] { background: var(--bg-tertiary); box-shadow: var(--shadow-1); }

/* — Switch / toggle — */
.x-switch {
  appearance: none; width: 51px; height: 31px; border-radius: var(--r-pill);
  background: var(--fill); position: relative; cursor: pointer; flex: none;
  transition: background var(--dur-base) var(--ease-standard);
}
.x-switch::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 27px; height: 27px;
  border-radius: 50%; background: #fff; box-shadow: var(--shadow-2);
  transition: transform var(--dur-base) var(--ease-spring);
}
.x-switch:checked { background: var(--sys-green); }
.x-switch:checked::after { transform: translateX(20px); }

/* — Text field — */
.x-field {
  width: 100%; min-height: var(--hit); padding: 0 var(--sp-4);
  background: var(--fill-tertiary); border: none; border-radius: var(--r-sm);
  color: var(--label);
}
.x-field:focus-visible { outline: 2px solid var(--tint); outline-offset: 1px; }
.x-search {
  display: flex; align-items: center; gap: var(--sp-2);
  min-height: 36px; padding: 0 var(--sp-3);
  background: var(--fill-tertiary); border-radius: var(--r-sm); color: var(--label-secondary);
}

/* — Badge / chip — */
.x-badge {
  display: inline-flex; align-items: center; gap: 4px;
  min-width: 20px; height: 20px; padding: 0 6px; border-radius: var(--r-pill);
  background: var(--sys-red); color: #fff;
  font: 600 var(--t-caption1)/1 var(--font-sans); justify-content: center;
}
.x-chip {
  display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 12px;
  background: var(--fill-tertiary); border-radius: var(--r-pill);
  font: 500 var(--t-footnote)/1 var(--font-sans);
}

/* — Progress (indeterminate) — */
.x-progress { height: 4px; border-radius: 2px; background: var(--fill-tertiary); overflow: hidden; }
.x-progress > i { display: block; height: 100%; width: 40%; background: var(--tint); border-radius: 2px; animation: x-prog 1.2s var(--ease-standard) infinite; }
@keyframes x-prog { 0%{transform:translateX(-100%)} 100%{transform:translateX(320%)} }

/* — Toolbar (macOS) — */
.x-toolbar { display: flex; align-items: center; gap: var(--sp-2); min-height: 52px; padding: 0 var(--sp-4); border-bottom: .5px solid var(--separator); }
.x-traffic { display: flex; gap: 8px; }
.x-traffic i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.x-traffic i:nth-child(1){background:#FF5F57} .x-traffic i:nth-child(2){background:#FEBC2E} .x-traffic i:nth-child(3){background:#28C840}

/* — Slider (track 4pt, thumb 28pt; min 44pt touch) — */
.x-slider {
  appearance: none; -webkit-appearance: none; width: 100%; height: 44px;
  background: transparent; cursor: pointer;
}
.x-slider::-webkit-slider-runnable-track {
  height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--tint) var(--x-fill, 50%), var(--fill-tertiary) var(--x-fill, 50%));
}
.x-slider::-webkit-slider-thumb {
  appearance: none; -webkit-appearance: none; width: 28px; height: 28px; margin-top: -12px;
  border-radius: 50%; background: #fff; border: none;
  box-shadow: 0 0.5px 4px rgba(0,0,0,.12), 0 6px 13px rgba(0,0,0,.12);
}
.x-slider::-moz-range-track { height: 4px; border-radius: 2px; background: var(--fill-tertiary); }
.x-slider::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--tint); }
.x-slider::-moz-range-thumb { width: 28px; height: 28px; border: none; border-radius: 50%; background: #fff; box-shadow: 0 0.5px 4px rgba(0,0,0,.12), 0 6px 13px rgba(0,0,0,.12); }

/* — Stepper (dwusegmentowe ±) — */
.x-stepper { display: inline-flex; background: var(--fill-tertiary); border-radius: var(--r-xs); overflow: hidden; }
.x-stepper button {
  width: 47px; height: 32px; border: none; background: transparent; color: var(--label);
  font: 400 22px/1 var(--font-sans); cursor: pointer; display: grid; place-items: center;
}
.x-stepper button:active { background: var(--fill-secondary); }
.x-stepper button:disabled { color: var(--label-quaternary); }
.x-stepper button + button { border-left: .5px solid var(--separator); }

/* — Alert (centrowany, 270pt, hairline buttons) — */
.x-alert {
  width: 270px; border-radius: var(--r-md); overflow: hidden; text-align: center;
  background: var(--glass-bg-thick);
  -webkit-backdrop-filter: saturate(190%) blur(30px); backdrop-filter: saturate(190%) blur(30px);
  box-shadow: var(--shadow-3);
}
.x-alert__body { padding: var(--sp-5) var(--sp-4) var(--sp-4); }
.x-alert__title { font: 600 var(--t-headline)/var(--lh-headline) var(--font-sans); }
.x-alert__msg { font: 400 var(--t-footnote)/var(--lh-footnote) var(--font-sans); color: var(--label); margin-top: 4px; }
.x-alert__actions { display: flex; border-top: .5px solid var(--separator); }
.x-alert__actions button {
  flex: 1; min-height: 44px; border: none; background: transparent; cursor: pointer;
  font: 400 var(--t-body)/1 var(--font-sans); color: var(--tint);
}
.x-alert__actions button + button { border-left: .5px solid var(--separator); }
.x-alert__actions .is-bold { font-weight: 600; }
.x-alert__actions .is-destructive { color: var(--sys-red); }
.x-alert__actions button:active { background: var(--fill-quaternary); }
.x-alert--stacked .x-alert__actions { flex-direction: column; }
.x-alert--stacked .x-alert__actions button + button { border-left: none; border-top: .5px solid var(--separator); }

/* — Action sheet (iPhone bottom) — */
.x-action-sheet { width: min(400px, calc(100vw - 16px)); display: grid; gap: var(--sp-2); }
.x-action-sheet__group {
  border-radius: var(--r-md); overflow: hidden;
  background: var(--glass-bg-thick);
  -webkit-backdrop-filter: saturate(190%) blur(30px); backdrop-filter: saturate(190%) blur(30px);
}
.x-action-sheet__title { padding: var(--sp-3) var(--sp-4); text-align: center; font: 400 var(--t-footnote)/var(--lh-footnote) var(--font-sans); color: var(--label-secondary); }
.x-action-sheet button {
  display: block; width: 100%; min-height: 56px; border: none; background: transparent; cursor: pointer;
  font: 400 20px/1 var(--font-sans); color: var(--tint);
}
.x-action-sheet button + button, .x-action-sheet__title + button { border-top: .5px solid var(--separator); }
.x-action-sheet .is-destructive { color: var(--sys-red); }
.x-action-sheet .is-cancel { font-weight: 600; }
.x-action-sheet button:active { background: var(--fill-quaternary); }

/* — Sheet (bottom sheet z grabberem / detents) — */
.x-sheet {
  border-radius: var(--r-sm) var(--r-sm) 0 0; background: var(--bg-grouped-secondary);
  box-shadow: 0 -10px 40px rgba(0,0,0,.18); padding-top: var(--sp-2);
}
.x-grabber { width: 36px; height: 5px; border-radius: 3px; background: var(--fill); margin: 0 auto var(--sp-2); }

/* — Menu / context menu (pull-down) — */
.x-menu {
  width: 250px; border-radius: var(--r-md); overflow: hidden; padding: 0;
  background: var(--glass-bg-thick);
  -webkit-backdrop-filter: saturate(190%) blur(30px); backdrop-filter: saturate(190%) blur(30px);
  box-shadow: var(--shadow-3);
}
.x-menu__item {
  display: flex; align-items: center; gap: var(--sp-3); min-height: 44px; padding: 0 var(--sp-4);
  font: 400 var(--t-body)/1 var(--font-sans); color: var(--label); cursor: pointer;
}
.x-menu__item:hover { background: var(--fill-quaternary); }
.x-menu__item + .x-menu__item { border-top: .5px solid var(--separator); }
.x-menu__item .x-menu__icon { margin-left: auto; color: var(--label-secondary); display: flex; }
.x-menu__sep { height: 8px; background: var(--fill-quaternary); border-top: .5px solid var(--separator); border-bottom: .5px solid var(--separator); }
.x-menu__item.is-destructive { color: var(--sys-red); }
.x-menu__item.is-destructive .x-menu__icon { color: var(--sys-red); }

/* — Page control (kropki) — */
.x-pagedots { display: inline-flex; gap: 9px; align-items: center; }
.x-pagedots i { width: 8px; height: 8px; border-radius: 50%; background: var(--fill); display: block; }
.x-pagedots i[aria-current="true"] { background: var(--label); }

/* — Navigation bar: wariant large title — */
.x-navbar-large { padding: var(--sp-2) var(--sp-4) var(--sp-3); }
.x-navbar-large .x-navbar__bigtitle { font: 700 var(--t-large-title)/var(--lh-large-title) var(--font-sans); letter-spacing: .37px; }

/* — Spinner (indeterminate, activity indicator) — */
.x-spinner { width: 22px; height: 22px; border-radius: 50%; flex: none;
  border: 2.5px solid var(--fill-tertiary); border-top-color: var(--label-secondary);
  animation: x-spin .8s linear infinite; }
@keyframes x-spin { to { transform: rotate(360deg); } }

/* — Utilities — */
.x-stack { display: flex; flex-direction: column; }
.x-hstack { display: flex; align-items: center; }
.x-grow { flex: 1; }
.x-muted { color: var(--label-secondary); }
.x-faint { color: var(--label-tertiary); }
.x-tint  { color: var(--tint); }

/* ===================== 7. ACCESSIBILITY OVERRIDES ========================= */

/* Visible focus ring everywhere (keyboard users) */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 2.5px solid var(--tint); outline-offset: 2px; border-radius: var(--r-xs);
}

/* Reduce Transparency → swap Liquid Glass for opaque surfaces */
@media (prefers-reduced-transparency: reduce) {
  .x-glass, .x-glass-thin, .x-glass-thick, .x-btn-glass {
    -webkit-backdrop-filter: none; backdrop-filter: none;
    background: var(--bg-secondary);
  }
  .x-glass::after, .x-glass-thick::after { display: none; }
}

/* Reduce Motion → kill non-essential animation */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
}

/* Increase Contrast → firmer separators & text */
@media (prefers-contrast: more) {
  :root { --separator: rgba(60,60,67,.6); --label-secondary: rgba(60,60,67,.85); }
  [data-theme="dark"] { --separator: rgba(255,255,255,.6); --label-secondary: rgba(235,235,245,.85); }
  .x-btn-tinted { outline: 1px solid var(--tint); }
}

/* Windows High Contrast / forced-colors */
@media (forced-colors: active) {
  .x-glass, .x-glass-thin, .x-glass-thick { border: 1px solid CanvasText; }
  .x-btn { border: 1px solid CanvasText; }
}