/**
 * Basis-Layout für InovaTech Website — „Studio Light"
 * Body, Typografie, Container, Header/Navigation, Footer.
 */

body {
  background: var(--surface-0);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  overflow-x: clip;
}

/* Sanftes Einblenden der Seite nach Load (Klasse via main.js) */
body {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

body.page-loaded,
.no-js body {
  opacity: 1;
}

/* ==================== TYPOGRAFIE ==================== */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-display);
  text-wrap: balance;
}

.headline-hero {
  font-size: var(--fs-hero);
}

.headline-display {
  font-size: var(--fs-display);
}

.headline-mega {
  font-size: var(--fs-mega);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--color-red);
  margin-bottom: var(--space-md);
}

.lead {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  text-wrap: pretty;
}

.text-gradient-red {
  background: var(--gradient-text-red);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ==================== LAYOUT ==================== */

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

.container--wide {
  max-width: var(--container-wide);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--gap-section);
  position: relative;
}

.section--compact {
  padding-block: var(--gap-section-compact);
}

/* Weiße Bänder im hellgrauen Seitenfluss (Apple-Rhythmus) */
.section--light {
  background: var(--surface-1);
}

.section__header {
  max-width: 720px;
  margin-bottom: var(--space-4xl);
}

.section__header--center {
  margin-inline: auto;
  text-align: center;
}

/* ==================== HILFSKLASSEN ==================== */

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: calc(var(--z-header) + 1);
  background: var(--color-red);
  color: #FFFFFF;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  transform: translateY(-200%);
  transition: transform var(--duration-fast) var(--ease-out);
}

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

/* ==================== HEADER / NAVIGATION ==================== */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: var(--header-height);
  z-index: var(--z-header);
  transition: background var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}

/* Helles Glas sobald gescrollt (Klasse via nav.js) */
.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(245, 245, 247, 0.78);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--border-subtle);
}

.site-header__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.site-header__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.site-header__logo img {
  width: 148px;
  height: auto;
}

.site-header__nav {
  margin-left: auto;
}

.site-header__nav ul {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 1.75rem);
}

.site-header__nav a {
  font-size: 0.8125rem;
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.site-header__nav a:hover,
.site-header__nav a.is-active {
  color: var(--text-primary);
}

.site-header__cta {
  flex-shrink: 0;
}

/* Burger (nur mobil/tablet) */
.site-header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  margin-right: -8px;
}

.site-header__burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base) var(--ease-out);
}

.site-header__burger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__burger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.site-header__burger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobiles Menü (Overlay) */
.mobile-menu {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  z-index: var(--z-mobile-menu);
  background: rgba(245, 245, 247, 0.92);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  backdrop-filter: saturate(180%) blur(24px);
  padding: var(--space-2xl) var(--container-padding) var(--space-4xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              visibility 0s linear var(--duration-base);
  overflow-y: auto;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

.mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  padding-block: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-menu .btn {
  margin-top: var(--space-lg);
  align-self: flex-start;
}

@media (max-width: 1024px) {
  /* Höhere Spezifität als .btn (display: inline-flex) aus components.css */
  .site-header .site-header__nav,
  .site-header .site-header__cta {
    display: none;
  }

  .site-header .site-header__burger {
    display: flex;
    margin-left: auto;
  }
}

/* ==================== FOOTER ==================== */

.site-footer {
  background: var(--surface-1);
  border-top: 1px solid var(--border-subtle);
  padding-block: var(--space-5xl) var(--space-2xl);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-4xl);
}

.site-footer__brand img {
  width: 150px;
  margin-bottom: var(--space-lg);
}

.site-footer__claim {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  font-size: var(--fs-sm);
}

.site-footer h2 {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-lg);
}

.site-footer ul {
  display: grid;
  gap: var(--space-sm);
}

.site-footer a {
  color: var(--text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer a:hover {
  color: var(--text-primary);
}

.site-footer address {
  font-style: normal;
  line-height: var(--lh-relaxed);
}

.site-footer__bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
}

.site-footer__legal {
  display: flex;
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}