/* ============================================================
   base.css — kapy.ch v2
   Modern CSS Reset (Andy Bell style) + minimal layout helpers.
   Typography lives in typography.css.
   Full layout system comes in Task 3 (grid/utilities.css).
   ============================================================ */

/* ---------- Reset ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
  /* Reserve scrollbar space permanently — prevents layout shift when
     content height changes between pages + makes 100vw / .full-bleed
     calculations match the visible viewport. */
  scrollbar-gutter: stable;
}

html:focus-within {
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  background-color: var(--bg-canvas);
  /* Safety net: prevent rare horizontal-scroll cases when full-bleed
     sections or aurora ::before pseudos slightly overshoot the viewport
     edge on browsers without scrollbar-gutter support. */
  overflow-x: clip;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* iOS-Auto-Zoom-Schutz — Safari zoomt bei Form-Focus wenn font-size < 16px.
   max(16px, 1em) garantiert min 16px auch bei späteren em-Overrides in Components. */
input,
textarea,
select {
  font-size: max(16px, 1em);
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

#root,
#__next,
#main {
  isolation: isolate;
}

/* ---------- Focus-Visible (global, A11y-Pflicht) ---------- */

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
  border-radius: var(--radius-sm);
}

/* ---------- Skip-Link (A11y) ---------- */

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-surface);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-weight: var(--fw-medium);
  text-decoration: none;
  z-index: var(--z-toast);
  transform: translateY(-150%);
  transition: transform var(--dur-fast) var(--ease-out);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ---------- Utilities ---------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.tabular,
[data-tabular],
.price,
.stat,
.roi,
.currency {
  font-variant-numeric: tabular-nums lining-nums;
  font-feature-settings:
    'tnum' 1,
    'lnum' 1;
}

/* ---------- Minimal Layout-Helfer (volle Implementation in Task 3) ---------- */

main {
  max-width: var(--container-max);
  margin-inline: auto;
  /* Synced with .container clamp (layout.css) so nested .container doesn't
     double-pad. main provides default inline padding for un-containered
     sections; .container inside main is a no-op horizontally (same clamp). */
  padding-inline: clamp(var(--space-4), 4vw, var(--space-7));
}

main > section {
  padding-block: clamp(var(--space-7), 8vw, var(--space-9));
}

main > section + section {
  border-block-start: 1px solid var(--border-subtle);
}

main > section > * + * {
  margin-block-start: var(--space-4);
}

/* ---------- Footer Minimal-Styling (volle Implementation in Task 4 follow-up) ---------- */
/* Header styles moved to components/nav.css (Task 4) */

body > footer {
  margin-block-start: var(--space-8);
  padding-block-start: var(--space-7);
  /* env() für Home-Indicator / Software-Tasten: Footer-Content nicht überlappt */
  padding-block-end: calc(var(--space-7) + env(safe-area-inset-bottom, 0px));
  padding-inline: clamp(var(--space-4), 4vw, var(--space-7));
  border-block-start: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  font-size: var(--fs-body-sm);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
}

/* ---------- Language-Switcher Minimal-Styling ---------- */

.lang-switcher ul {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}

.lang-switcher li {
  display: inline-flex;
}

.lang-switcher li + li {
  margin-block-start: 0;
}

.lang-switcher a,
.lang-switcher__disabled {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 28px;
  padding-inline: var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--fs-overline);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-caps);
  text-decoration: none;
}

.lang-switcher a[aria-current='true'] {
  background: var(--brand-500);
  color: var(--text-on-brand);
}

.lang-switcher__disabled {
  color: var(--text-tertiary);
  cursor: not-allowed;
}

/* ---------- Test-Page-DL Helper (Task 0/1 Verification) ---------- */

main dl.kv {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2) var(--space-5);
}

main dl.kv dt {
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
}

main dl.kv dt + dd {
  margin-block-start: 0;
}

main dl.kv dd + dt {
  margin-block-start: 0;
}