/* TB-Software 2026, Base Styles */

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

/* HTML5 hidden-Attribut soll auch flex/grid/inline-flex überschreiben */
[hidden] { display: none !important; }

html {
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--tb-bg);
  color: var(--tb-ink-900);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: Geist, "Inter Tight", Inter, system-ui, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 var(--space-4);
}

h1 { font-size: clamp(2rem, 4vw, 2.5rem); letter-spacing: -0.015em; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 1.875rem); }
h3 { font-size: 1.375rem; }

p { margin: 0 0 var(--space-4); }

a {
  color: var(--tb-primary-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease-default), border-color var(--dur-fast) var(--ease-default);
}
a:hover { color: var(--tb-primary-900); border-bottom-color: currentColor; }
a:focus-visible { outline: 2px solid var(--tb-primary-500); outline-offset: 3px; border-radius: 2px; }

::selection { background: var(--tb-primary-200); color: var(--tb-ink-900); }

/* Container */
.tb-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Skip-Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--tb-primary-700);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  z-index: 9999;
}
.skip-link:focus { top: 0; }

/* Fokus-Ring konsistent */
:focus-visible {
  outline: 2px solid var(--tb-primary-500);
  outline-offset: 2px;
}

/* Reduzierte Bewegung */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Reveal-on-Scroll, sanfter Slide-Up, nie ganz unsichtbar ─────── */
.tb-reveal-ready [data-tb-reveal] {
  opacity: 0.55;
  transform: translateY(14px);
  transition: opacity 500ms cubic-bezier(0.32, 0.72, 0.0, 1.0),
              transform 500ms cubic-bezier(0.32, 0.72, 0.0, 1.0);
  will-change: opacity, transform;
}
.tb-reveal-ready [data-tb-reveal].is-revealed {
  opacity: 1;
  transform: none;
}