/* ============================================================
   Reset + Base Typography + Layout Primitives
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100svh;
  overflow-x: hidden;
}

img, svg, video, canvas, audio, iframe, embed, object {
  display: block;
  max-width: 100%;
}
img { height: auto; }

input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }

a {
  color: inherit;
  text-decoration-color: var(--color-accent-warm);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  transition: color var(--dur) var(--ease-out);
}
a:hover { color: var(--color-ink-soft); }

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Display / Body Type */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-4xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); font-family: var(--font-sans); font-weight: 600; letter-spacing: -0.01em; }

p { font-size: var(--fs-base); line-height: var(--lh-normal); }
p + p { margin-top: var(--space-sm); }

small { font-size: var(--fs-sm); }

ul, ol { padding-left: 1.25rem; }
li + li { margin-top: var(--space-2xs); }

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

::selection { background: var(--color-accent-warm); color: var(--color-ink); }

/* Layout-Primitives */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: var(--space-2xl);
}

.section--tight { padding-block: var(--space-xl); }
.section--loose { padding-block: var(--space-3xl); }

.section--dark {
  background: var(--color-surface-dark);
  color: var(--color-bg);
}
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 {
  color: var(--color-bg);
}

.section--alt { background: var(--color-bg-alt); }

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
}

.grid--2 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid--2 { grid-template-columns: 1fr 1fr; }
}

.grid--3 { grid-template-columns: 1fr; }
@media (min-width: 768px) { .grid--3 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } }

.grid--4 { grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid--4 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1024px) { .grid--4 { grid-template-columns: repeat(4, 1fr); } }

.stack > * + * { margin-top: var(--space-md); }
.stack-lg > * + * { margin-top: var(--space-lg); }
.stack-sm > * + * { margin-top: var(--space-sm); }

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

.flow > * + * { margin-top: 1em; }

.text-center { text-align: center; }
.text-muted { color: var(--color-ink-muted); }
.text-mono { font-family: var(--font-mono); letter-spacing: 0; }
.text-sm { font-size: var(--fs-sm); }
.text-lg { font-size: var(--fs-lg); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-loose);
  max-width: 60ch;
  color: var(--color-ink-soft);
}

/* Sichtbar nur für Screenreader */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px; left: 0;
  background: var(--color-ink);
  color: var(--color-bg);
  padding: var(--space-sm) var(--space-md);
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: var(--z-top);
  font-weight: 600;
}
.skip-link:focus { top: 0; }