/*
 * Grundlagen: Zurücksetzen, Hintergrund, Typografie, Seitenrahmen (docs/DESIGN.md 2.5, 3, 4, 8).
 */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-color: var(--surface-active) transparent;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font: var(--text-body);
  color: var(--text-1);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* 2.5: Kopf fast schwarz, zum unteren Rand warmes Licht wie in der Referenz. */
  background:
    radial-gradient(120% 60% at 50% 100%, rgba(42, 33, 27, 0.95) 0%, rgba(42, 33, 27, 0.55) 45%, rgba(15, 15, 18, 0) 80%),
    var(--bg-canvas);
  background-attachment: fixed;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul[class],
ol[class] {
  list-style: none;
  padding: 0;
}

h1 {
  font: var(--text-h1);
  letter-spacing: -0.01em;
}

h2 {
  font: var(--text-h2);
  letter-spacing: -0.005em;
}

h3 {
  font: var(--text-h3);
}

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

a {
  color: inherit;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  transition: color var(--ease), text-decoration-color var(--ease);
}

a:hover {
  text-decoration-color: currentcolor;
}

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

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: rgba(240, 174, 102, 0.3);
  color: var(--text-1);
}

[hidden] {
  display: none !important;
}

code,
kbd,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8125rem;
}

/* Zahlen stehen immer untereinander (DESIGN 3). */
.num,
table,
time {
  font-variant-numeric: tabular-nums;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.muted {
  color: var(--text-2);
}

.subtle {
  color: var(--text-3);
}

/* --- Seitenrahmen ------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: calc(var(--z-toast) + 1);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--r-pill);
  background: var(--gradient-light);
  color: var(--text-inverse);
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--ease);
}

.skip-link:focus {
  transform: none;
}

.page {
  flex: 1 0 auto;
  width: 100%;
  max-width: calc(var(--content-max) + 2 * var(--page-gutter));
  margin-inline: auto;
  padding: var(--space-6) var(--page-gutter) var(--space-8);
}

.page:focus {
  outline: none;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--grid-gap);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}