/* ============================================================
   ACSS 4.x design system — token-first engine
   ------------------------------------------------------------
   Layer 1: Tokens (OKLCH palette + scales)
   Layer 2: Base / reset
   Layer 3: Utilities (helpers — not the primary tool)
   Layer 4: Components (BEM — build your own on top of tokens)

   Principles (ACSS 4.x):
   - Token/variable-first. Components are custom BEM classes
     that consume tokens. Utilities are for one-off helpers.
   - OKLCH palette. Six semantic color slots, each with a
     fluid shade ladder.
   - Transparencies via color-mix() (no prebuilt -trans tokens).
   - Theming via color-scheme + light-dark(). Force a subtree
     with .scheme--light / .scheme--dark.
   - Fluid by default (clamp()), no breakpoints for type/space.

   Brand lives ONLY in the BRAND:colors / BRAND:fonts blocks
   below — re-tint there; everything else derives. See README.md.
   ============================================================ */

:root {
  color-scheme: light dark;

  /* === BRAND:colors START — the ONLY palette you edit per project. ───────────
     Six OKLCH slots, each a fluid shade ladder (ultra-light → ultra-dark + hover).
     Re-tint by changing the hue/chroma of each ladder; keep the token NAMES so
     components keep working. The defaults below are a NEUTRAL placeholder theme
     (blue primary, amber accent, grayscale everything else) — swap for the brand.

     Standard brand colours: NEUTRAL + PRIMARY + ACCENT. BASE is optional (additional
     to neutral — the bg/text foundation). SECONDARY / TERTIARY are optional, to support
     PRIMARY or ACCENT. If the brand has only these 3 colours, don't invent more — leave
     the optional slots neutral. Proportion ≈ 60-30-10: neutral/base ~60%, primary ~30%,
     accent ~10%.
     ──────────────────────────────────────────────────────────────────────── */

  /* Primary — main action color. CTAs, links, brand mark, headline accent word. */
  /* Thai-Massage: Zimt (cinnamon red-brown). White label 6.3:1, link on cream 5.7:1. */
  --primary-ultra-light: oklch(0.95 0.025 50);
  --primary-light:       oklch(0.86 0.05 48);
  --primary-semi-light:  oklch(0.72 0.09 46);
  --primary:             oklch(0.50 0.115 42);     /* AA: white label & link text ≥4.5:1 on paper */
  --primary-semi-dark:   oklch(0.44 0.10 40);
  --primary-dark:        oklch(0.38 0.085 38);     /* small-link / small-text safe on paper */
  --primary-ultra-dark:  oklch(0.29 0.06 35);
  --primary-hover:       oklch(0.46 0.11 41);

  /* Secondary — supporting brand colour: less-dominant buttons, highlights.
     OPTIONAL — neutral grayscale by default; re-tint only if the brand needs a 2nd hue. */
  --secondary-ultra-light: oklch(0.96 0 0);
  --secondary-light:       oklch(0.84 0 0);
  --secondary-semi-light:  oklch(0.64 0 0);
  --secondary:             oklch(0.50 0 0);
  --secondary-semi-dark:   oklch(0.40 0 0);
  --secondary-dark:        oklch(0.32 0 0);
  --secondary-ultra-dark:  oklch(0.24 0 0);
  --secondary-hover:       oklch(0.45 0 0);

  /* Tertiary — optional 3rd brand colour: tags, alternate sections, decoration.
     OPTIONAL — neutral grayscale by default; re-tint only if needed. */
  --tertiary-ultra-light: oklch(0.96 0 0);
  --tertiary-light:       oklch(0.84 0 0);
  --tertiary-semi-light:  oklch(0.64 0 0);
  --tertiary:             oklch(0.50 0 0);
  --tertiary-semi-dark:   oklch(0.40 0 0);
  --tertiary-dark:        oklch(0.32 0 0);
  --tertiary-ultra-dark:  oklch(0.24 0 0);
  --tertiary-hover:       oklch(0.45 0 0);

  /* Accent — RARE special emphasis: badges, small highlights, "look here" moments.
     Use sparingly (if everything is accent it stops being one). LIGHT fill, DARK text;
     not a plain body-text colour (use --accent-dark for the AA-safe text shade). */
  /* Thai-Massage: Bernstein (amber/ochre) — ornament, temple-roof mark, badges. Dark text on it 6.5:1. */
  --accent-ultra-light: oklch(0.96 0.03 82);
  --accent-light:       oklch(0.90 0.06 80);
  --accent-semi-light:  oklch(0.83 0.09 77);
  --accent:             oklch(0.74 0.12 72);
  --accent-semi-dark:   oklch(0.65 0.115 68);
  --accent-dark:        oklch(0.54 0.10 65);       /* AA-safe text shade: ≥4.5:1 on paper */
  --accent-ultra-dark:  oklch(0.44 0.085 62);
  --accent-hover:       oklch(0.70 0.12 70);

  /* Base — Thai-Massage: cream paper ↔ tamarind-brown ink (flips in dark mode). */
  --base-ultra-light: oklch(0.97 0.02 85);         /* light bg: cream */
  --base-light:       oklch(0.93 0.03 82);         /* sand band */
  --base-semi-light:  oklch(0.87 0.035 78);
  --base:             oklch(0.55 0.04 50);
  --base-semi-dark:   oklch(0.36 0.045 35);
  --base-dark:        oklch(0.28 0.04 32);
  --base-ultra-dark:  oklch(0.22 0.03 30);         /* dark bg / light-mode text: warm near-black brown */
  --base-hover:       oklch(0.50 0.04 45);

  /* Neutral — warm sand greys for muted text, borders, hairlines. */
  --neutral-ultra-light: oklch(0.96 0.012 80);
  --neutral-light:       oklch(0.89 0.02 75);
  --neutral-semi-light:  oklch(0.76 0.025 70);
  --neutral:             oklch(0.60 0.03 60);
  --neutral-semi-dark:   oklch(0.47 0.03 50);
  --neutral-dark:        oklch(0.36 0.03 42);
  --neutral-ultra-dark:  oklch(0.26 0.025 35);
  --neutral-hover:       oklch(0.54 0.03 55);
  /* === BRAND:colors END === */

  /* ──────────── STATUS COLORS ──────────── */
  --success-light: oklch(0.92 0.06 150);
  --success:       oklch(0.60 0.14 150);
  --success-dark:  oklch(0.45 0.12 150);

  --warning-light: oklch(0.94 0.07 85);
  --warning:       oklch(0.72 0.15 75);
  --warning-dark:  oklch(0.55 0.13 65);

  --danger-light:  oklch(0.93 0.05 25);
  --danger:        oklch(0.58 0.20 27);
  --danger-dark:   oklch(0.45 0.17 27);

  --info-light:    oklch(0.93 0.04 235);
  --info:          oklch(0.62 0.13 235);
  --info-dark:     oklch(0.48 0.12 235);

  /* ──────────── SEMANTIC LAYER (use in components) ────────────
     These flip automatically with the active color scheme.
     light-dark(<light value>, <dark value>).                    */
  --clr-bg:            light-dark(var(--base-ultra-light), var(--base-ultra-dark));
  --clr-surface:       light-dark(var(--base-ultra-light), var(--base-dark));
  --clr-surface-raised:light-dark(#ffffff, var(--base-semi-dark));
  --clr-text:          light-dark(var(--base-ultra-dark), var(--base-ultra-light));
  --clr-text-muted:    light-dark(var(--neutral-semi-dark), var(--neutral-semi-light));
  --clr-border:        light-dark(var(--neutral-light), color-mix(in oklch, var(--base-dark), white 12%));
  --clr-border-strong: light-dark(var(--neutral-semi-light), var(--neutral-semi-dark));
  --clr-link:          light-dark(var(--primary), var(--primary-semi-light));
  --clr-link-hover:    light-dark(var(--primary-hover), var(--primary-light));

  /* ──────────── TYPOGRAPHY ──────────── */
  /* === BRAND:fonts START — selbst gehostet, siehe LICENSES.md. === */
  --ff-heading: "Gloock", Georgia, ui-serif, serif;
  --ff-body:    "Jost", ui-sans-serif, system-ui, sans-serif;
  --ff-mono:    ui-monospace, SFMono-Regular, Menlo, monospace;
  /* === BRAND:fonts END === */

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Fluid text scale */
  --text-xs:  clamp(0.75rem, 0.72rem + 0.15vw, 0.85rem);
  --text-s:   clamp(0.875rem, 0.82rem + 0.27vw, 1rem);
  --text-m:   clamp(1rem, 0.93rem + 0.36vw, 1.125rem);
  --text-l:   clamp(1.125rem, 1.02rem + 0.5vw, 1.375rem);
  --text-xl:  clamp(1.375rem, 1.21rem + 0.83vw, 1.75rem);
  --text-xxl: clamp(1.625rem, 1.4rem + 1.13vw, 2.25rem);

  /* Fluid heading scale */
  --h6: clamp(1rem, 0.93rem + 0.36vw, 1.125rem);
  --h5: clamp(1.125rem, 1.02rem + 0.5vw, 1.375rem);
  --h4: clamp(1.375rem, 1.21rem + 0.83vw, 1.75rem);
  --h3: clamp(1.625rem, 1.4rem + 1.13vw, 2.25rem);
  --h2: clamp(2rem, 1.65rem + 1.74vw, 3rem);
  --h1: clamp(2.5rem, 1.95rem + 2.78vw, 4.5rem);

  --lh-tight: 1.1;
  --lh-snug: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.7;

  --ls-tight: -0.02em;
  --ls-normal: 0;
  --ls-wide: 0.05em;

  /* ──────────── SPACING (fluid, 8px-grid feel) ──────────── */
  --space-xs:  clamp(0.5rem, 0.4rem + 0.4vw, 0.75rem);
  --space-s:   clamp(0.75rem, 0.6rem + 0.6vw, 1rem);
  --space-m:   clamp(1rem, 0.8rem + 0.9vw, 1.5rem);
  --space-l:   clamp(1.5rem, 1.2rem + 1.4vw, 2.5rem);
  --space-xl:  clamp(2rem, 1.6rem + 1.9vw, 3.5rem);
  --space-xxl: clamp(3rem, 2.3rem + 3vw, 5rem);

  /* Section spacing */
  --section-space-s:   clamp(2rem, 1.5rem + 2vw, 3rem);
  --section-space-m:   clamp(3rem, 2.3rem + 3vw, 5rem);
  --section-space-l:   clamp(4rem, 3rem + 4.5vw, 7rem);
  --gutter: var(--space-m);

  /* Contextual gaps (use these in components, not raw --space-*) */
  --content-gap:   var(--space-m);
  --container-gap: var(--space-l);
  --grid-gap:      var(--space-m);

  /* ──────────── LAYOUT WIDTHS ──────────── */
  --width-xs: 20rem;
  --width-s:  30rem;
  --width-m:  45rem;
  --width-l:  60rem;
  --width-xl: 75rem;
  --width-xxl: 90rem;
  --wrapper-padding-inline: var(--space-m);
  --header-height: 4.5rem;

  /* ──────────── RADII ──────────── */
  --radius-s: 0.25rem;
  --radius-m: 0.5rem;
  --radius-l: 1rem;
  --radius-pill: 999px;

  /* ──────────── SHADOWS (scheme-aware) ──────────── */
  --shadow-sm: 0 1px 2px light-dark(oklch(0.18 0.012 260 / 0.06), oklch(0 0 0 / 0.40));
  --shadow-md: 0 4px 12px light-dark(oklch(0.18 0.012 260 / 0.10), oklch(0 0 0 / 0.50));
  --shadow-lg: 0 12px 32px light-dark(oklch(0.18 0.012 260 / 0.14), oklch(0 0 0 / 0.60));

  /* ──────────── MOTION ──────────── */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* ──────────── Z-INDEX ──────────── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* Force a subtree into one scheme regardless of system / toggle.
   Note: light-dark() only re-resolves on the element where a property
   is declared. Any element that should flip must set its own
   color from a token — inherited color won't flip across this boundary. */
.scheme--light { color-scheme: light; color: var(--clr-text); }
.scheme--dark  { color-scheme: dark;  color: var(--clr-text); }

/* ============================================================
   LAYER 2 — BASE / RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  font-family: var(--ff-body);
  font-size: var(--text-m);
  line-height: var(--lh-normal);
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-heading);
  font-weight: var(--fw-medium);   /* headings default to a lighter display weight; override per brand */
  font-optical-sizing: auto;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  margin: 0;
  text-wrap: balance;
  color: var(--clr-text);
}
h1 { font-size: var(--h1); }
h2 { font-size: var(--h2); }
h3 { font-size: var(--h3); }
h4 { font-size: var(--h4); }
h5 { font-size: var(--h5); }
h6 { font-size: var(--h6); }

p { margin: 0; max-inline-size: 65ch; text-wrap: pretty; }

a { color: var(--clr-link); text-underline-offset: 0.2em; }
a:hover { color: var(--clr-link-hover); }

img, svg, video { display: block; max-inline-size: 100%; block-size: auto; }

section { padding-block: var(--section-space-m); }

:focus-visible {
  /* Light mode uses --primary (an accent fill can be too light on a light bg for
     a 3:1 ring). Dark mode uses --accent, which reads fine on the dark bg. */
  outline: 2px solid light-dark(var(--primary), var(--accent));
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   LAYER 3 — UTILITIES (helpers only)
   ============================================================ */
.wrapper {
  max-inline-size: var(--width-xl);
  margin-inline: auto;
  padding-inline: var(--wrapper-padding-inline);
}
.wrapper--narrow { max-inline-size: var(--width-m); }
.wrapper--wide   { max-inline-size: var(--width-xxl); }

.flow > * + * { margin-block-start: var(--content-gap); }

/* Background utilities — .bg--{color}[-shade] */
.bg--primary       { background: var(--primary); color: var(--base-ultra-light); }
.bg--primary-light { background: var(--primary-light); color: var(--base-ultra-dark); }
.bg--secondary     { background: var(--secondary); color: var(--base-ultra-light); }
.bg--tertiary      { background: var(--tertiary); color: var(--base-ultra-light); }
.bg--accent        { background: var(--accent); color: var(--base-ultra-dark); }
.bg--neutral-light { background: var(--neutral-light); color: var(--base-ultra-dark); }
.bg--surface       { background: var(--clr-surface); }

/* Text color utilities */
.text--primary { color: var(--primary); }
.text--accent  { color: var(--accent-dark); }
.text--muted   { color: var(--clr-text-muted); }
.text--success { color: var(--success-dark); }
.text--danger  { color: var(--danger-dark); }

/* Text size + alignment */
.text--xs { font-size: var(--text-xs); }
.text--s  { font-size: var(--text-s); }
.text--l  { font-size: var(--text-l); }
.text--xl { font-size: var(--text-xl); }
.text--center { text-align: center; }
.text--right  { text-align: right; }

/* Spacing utilities (one-offs only) */
.pad--s  { padding: var(--space-s); }
.pad--m  { padding: var(--space-m); }
.pad--l  { padding: var(--space-l); }
.mt--m   { margin-block-start: var(--space-m); }
.mt--l   { margin-block-start: var(--space-l); }
.gap--s  { gap: var(--space-s); }
.gap--m  { gap: var(--space-m); }
.gap--l  { gap: var(--space-l); }

/* Layout helpers */
.grid--auto {
  display: grid;
  gap: var(--grid-gap);
  grid-template-columns: repeat(auto-fit, minmax(min(16rem, 100%), 1fr));
}
.flex      { display: flex; gap: var(--space-m); }
.flex--wrap{ flex-wrap: wrap; }
.flex--center { align-items: center; }
.flex--between { justify-content: space-between; }

/* Display / visibility */
.hidden { display: none; }
.visually-hidden {
  position: absolute; inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ============================================================
   LAYER 4 — COMPONENTS (BEM)
   Components reference SEMANTIC tokens and palette shades —
   never raw color values.
   ============================================================ */

/* ---------- Button ---------- */
.button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-s) var(--space-l);
  font-family: var(--ff-heading);
  font-size: var(--text-s);
  font-weight: var(--fw-semibold);
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-m);
  cursor: pointer;
  transition: transform var(--transition-fast),
              background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
}
.button:hover  { transform: translateY(-2px); }
.button:active { transform: scale(0.98); }

.button--primary {
  background: var(--primary);
  color: var(--base-ultra-light);
}
.button--primary:hover { background: var(--primary-hover); }

.button--secondary {
  background: transparent;
  color: var(--clr-text);
  border-color: var(--clr-border-strong);
}
.button--secondary:hover { border-color: var(--primary); color: var(--primary); }

.button--accent {
  background: var(--accent);
  color: var(--base-ultra-dark);
}
.button--accent:hover { background: var(--accent-hover); }

.button--ghost {
  background: transparent;
  color: var(--clr-link);
}
.button--ghost:hover { background: color-mix(in oklch, var(--primary), transparent 90%); }

.button--small { padding: var(--space-xs) var(--space-m); font-size: var(--text-xs); }

/* ---------- Card ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: var(--content-gap);
  padding: var(--space-l);
  background: var(--clr-surface-raised);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.card--interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card__title { font-size: var(--h4); }
.card__text  { color: var(--clr-text-muted); font-size: var(--text-s); }
.card--featured { border-color: var(--accent); border-width: 2px; }

/* ---------- Badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-s);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-pill);
  background: light-dark(
                color-mix(in oklch, var(--primary), transparent 88%),
                color-mix(in oklch, var(--primary), transparent 72%));
  color: light-dark(var(--primary-dark), var(--primary-light));
}
.badge--accent  {
  background: light-dark(
                color-mix(in oklch, var(--accent), transparent 80%),
                color-mix(in oklch, var(--accent), transparent 60%));
  color: light-dark(var(--accent-dark), var(--accent-light));
}
.badge--success { background: var(--success-light); color: var(--success-dark); }
.badge--danger  { background: var(--danger-light);  color: var(--danger-dark); }

/* ---------- Alert ---------- */
.alert {
  display: flex;
  gap: var(--space-s);
  padding: var(--space-m);
  border-radius: var(--radius-m);
  border-inline-start: 4px solid var(--info);
  background: color-mix(in oklch, var(--info), transparent 88%);
  color: var(--clr-text);
  font-size: var(--text-s);
}
.alert--success { border-color: var(--success); background: color-mix(in oklch, var(--success), transparent 88%); }
.alert--warning { border-color: var(--warning); background: color-mix(in oklch, var(--warning), transparent 85%); }
.alert--danger  { border-color: var(--danger);  background: color-mix(in oklch, var(--danger),  transparent 90%); }

/* ---------- Form field ---------- */
.field { display: flex; flex-direction: column; gap: var(--space-xs); }
.field__label { font-size: var(--text-s); font-weight: var(--fw-medium); }
.field__input {
  padding: var(--space-s) var(--space-m);
  font: inherit;
  font-size: var(--text-s);
  color: var(--clr-text);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-strong);
  border-radius: var(--radius-m);
  transition: border-color var(--transition-fast);
}
.field__input:focus-visible { border-color: var(--primary); outline-offset: 0; }
.field__input[aria-invalid="true"] { border-color: var(--danger); }
.field__hint { font-size: var(--text-xs); color: var(--clr-text-muted); }