/* ===========================================================================
   livesmart365 – Design System
   Basiert auf 365-design-system.md · ls365-brand-summary.md (April 2026)
   =========================================================================== */

:root {
  /* Basis */
  --color-bg: #FFFFFF;
  --color-text: #141413;
  --color-text-muted: #737373;

  /* Grautöne */
  --color-gray-50: #F5F5F5;
  --color-gray-100: #E3E3E3;
  --color-gray-400: #979797;
  --color-gray-500: #737373;
  --color-gray-700: #404040;
  --color-gray-900: #141413;

  /* Blau */
  --color-primary-blue: #1A6AFF;
  --color-deep-blue: #082F7B;
  --color-deep-blue-2: #0B3A9A;

  /* Akzent Violet (livesmart365) */
  --color-accent: #7C3AED;
  --color-accent-dark: #5B21B6;
  --color-accent-light: #EDE9FE;
  --color-accent-light-transparent: rgba(124, 58, 237, 0.18);

  /* Schwestermarken */
  --color-ws365: #EA6020;
  --color-is365: #10B981;

  /* Radien */
  --radius-card: 16px;
  --radius-icon: 12px;
  --radius-pill: 100px;

  /* Container */
  --container-max: 1200px;
  --container-padding: 24px;

  /* Schatten */
  --shadow-card: 0 2px 8px rgba(20, 20, 19, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(20, 20, 19, 0.10);
}

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

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

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: var(--color-accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  margin: 0 0 16px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
}

p { margin: 0 0 16px; }

.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;
  left: -9999px;
  top: 0;
  background: var(--color-deep-blue);
  color: #fff;
  padding: 12px 20px;
  z-index: 100;
}
.skip-link:focus { left: 16px; top: 16px; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-gray-100);
  z-index: 50;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
  gap: 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover { text-decoration: none; }

.site-logo img { width: 32px; height: 32px; }

.site-logo__mark {
  color: var(--color-text);
  font-weight: 700;
}

.site-logo__mark .ls-live { color: var(--color-accent); font-weight: 700; }
.site-logo__mark .ls-smart365 { color: var(--color-text); font-weight: 700; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  color: var(--color-deep-blue);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  position: relative;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent-dark);
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  transition: background-color 0.12s ease, transform 0.12s ease;
}

.site-header__cta:hover { background: var(--color-accent-dark); text-decoration: none; transform: translateY(-1px); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  color: var(--color-deep-blue);
}
.nav-toggle svg { width: 28px; height: 28px; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--color-deep-blue) 0%, var(--color-deep-blue-2) 100%);
  color: #fff;
  padding: 96px 0 80px;
}

.hero--center { text-align: center; }

.hero__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__eyebrow {
  display: inline-block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(2.25rem, 4vw + 1rem, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero h1 .accent { color: var(--color-accent); }

.hero__subtitle {
  font-size: clamp(1rem, 0.5vw + 0.9rem, 1.125rem);
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 0 0 32px;
  line-height: 1.6;
}

.hero--center .hero__subtitle { margin-left: auto; margin-right: auto; }

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero--center .hero__ctas { justify-content: center; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(124, 58, 237, 0.2);
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: #EDE9FE;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

/* ---------- Gleichung (Equation) ---------- */
.equation {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-card);
  padding: 28px;
  display: grid;
  gap: 20px;
}

.equation__title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.equation__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-weight: 800;
  font-size: 1.0625rem;
  color: #fff;
}

.equation__pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  transition: background-color 0.12s ease, border-color 0.12s ease, transform 0.12s ease;
}

.equation__pill:hover { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.28); transform: translateY(-1px); text-decoration: none; }

.equation__pill--ws .dot { background: var(--color-ws365); }
.equation__pill--is .dot { background: var(--color-is365); }
.equation__pill--ls { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.equation__pill--ls .dot { background: #fff; }

.equation__pill .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.equation__op { color: rgba(255, 255, 255, 0.5); font-size: 1.25rem; }

.equation__group {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.equation__note { font-size: 14px; color: rgba(255, 255, 255, 0.7); margin: 0; font-weight: 500; }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section--alt { background: var(--color-gray-50); }
.section--deep { background: var(--color-deep-blue); color: #fff; }
.section--deep h2, .section--deep h3 { color: #fff; }

.section__head {
  max-width: 760px;
  margin: 0 auto 48px;
  text-align: center;
}

.section__head--left { margin-left: 0; text-align: left; }

.section__eyebrow {
  display: inline-block;
  color: var(--color-accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section--deep .section__eyebrow { color: var(--color-accent-light); }

.section__title {
  font-size: clamp(1.75rem, 2vw + 1rem, 2.5rem);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--color-deep-blue);
}

.section--deep .section__title { color: #fff; }

.section__lead {
  color: var(--color-gray-500);
  font-size: 1.0625rem;
  margin: 0;
}

.section--deep .section__lead { color: rgba(255, 255, 255, 0.85); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 15px;
  border: 2px solid transparent;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.2;
}

.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }

.btn--outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}
.btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.btn--secondary { background: var(--color-deep-blue); color: #fff; }
.btn--secondary:hover { background: var(--color-deep-blue-2); }

.btn--ghost {
  background: transparent;
  color: var(--color-deep-blue);
  border-color: var(--color-gray-100);
}
.btn--ghost:hover {
  border-color: var(--color-deep-blue);
  background: var(--color-gray-50);
}

/* ---------- Brand-Karten (ws365 / is365) ---------- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.brand-card {
  background: #fff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.brand-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--bc, var(--color-accent));
}

.brand-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
  text-decoration: none;
  border-color: transparent;
}

.brand-card--ws { --bc: var(--color-ws365); }
.brand-card--is { --bc: var(--color-is365); }

.brand-card__mark {
  display: inline-block;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--bc);
}

.brand-card__mark .tld {
  color: var(--color-text);
}

.brand-card__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bc);
  margin: 0;
}

.brand-card__title {
  font-size: 1.5rem;
  color: var(--color-deep-blue);
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.brand-card__text {
  color: var(--color-gray-700);
  font-size: 0.9375rem;
  margin: 0;
  flex-grow: 1;
}

.brand-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--bc);
  font-weight: 700;
  font-size: 0.9375rem;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  align-self: flex-start;
}

.brand-card:hover .brand-card__link { border-color: var(--bc); }

/* ---------- Values / Grundsätze ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.value {
  border-left: 3px solid var(--color-accent);
  padding-left: 20px;
}

.value__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin: 0 0 6px;
}

.value__text {
  color: var(--color-gray-700);
  font-size: 0.9375rem;
  margin: 0;
}

/* ---------- Feature-Grid (Bridge-Beispiele) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature {
  background: #fff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.feature:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.feature__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-icon);
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.feature__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--color-deep-blue);
}

.feature__text {
  color: var(--color-gray-700);
  font-size: 0.9375rem;
  margin: 0;
}

/* ---------- Autorenbox ---------- */
.author {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: flex-start;
  max-width: 1080px;
  margin: 0 auto;
}

.author__photo {
  position: relative;
  width: 100%;
  border-radius: var(--radius-card);
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--color-deep-blue) 0%, var(--color-accent) 100%);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.author__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.author__photo span {
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  text-align: center;
  padding: 20px;
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(180deg, transparent, rgba(8,47,123,0.7));
}

.author__eyebrow {
  color: var(--color-accent-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.author__title {
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2rem);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--color-deep-blue);
}

.author__bio {
  color: var(--color-gray-700);
  font-size: 1.0625rem;
  margin-bottom: 12px;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent-dark);
  font-weight: 700;
  border-bottom: 2px solid var(--color-accent-light);
  padding-bottom: 2px;
  margin-top: 8px;
}

.arrow-link:hover { border-color: var(--color-accent); text-decoration: none; }

/* ---------- Newsletter ---------- */
.nl-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 720px) {
  .nl-grid { grid-template-columns: 1fr; gap: 24px; }
  .nl-grid .newsletter-form { max-width: none; }
}

.newsletter-hero {
  background: linear-gradient(180deg, var(--color-deep-blue) 0%, var(--color-deep-blue-2) 100%);
  color: #fff;
  padding: 80px 0;
}

.newsletter-hero h1 {
  font-size: clamp(2rem, 3vw + 1rem, 3rem);
  margin-bottom: 16px;
  color: #fff;
  letter-spacing: -0.02em;
  max-width: 720px;
}

.newsletter-hero__lead {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.0625rem;
  max-width: 560px;
  margin: 0 0 32px;
}

.newsletter-form {
  max-width: 460px;
  display: grid;
  gap: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-card);
}

.newsletter-form input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  font-family: inherit;
  font-size: 15px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.newsletter-form input::placeholder { color: rgba(255, 255, 255, 0.55); }

.newsletter-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 0 3px var(--color-accent-light-transparent);
}

.newsletter-form button {
  width: 100%;
  padding: 14px 24px;
  border: 0;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border-radius: 10px;
  transition: background-color 0.12s ease;
}

.newsletter-form button:hover { background: var(--color-accent-dark); }

.newsletter-form__hint {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  text-align: center;
  margin: 0;
}

.newsletter-expectation {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  text-align: center;
}

.expectation__icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.expectation__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin: 0 0 6px;
}

.expectation__text {
  color: var(--color-gray-700);
  font-size: 0.9375rem;
  margin: 0;
}

/* ---------- Channel-Liste ---------- */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.channel {
  background: #fff;
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: inherit;
}

.channel:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
  text-decoration: none;
}

.channel__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-icon);
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 4px;
}

.channel__title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-deep-blue);
  margin: 0;
}

.channel__text {
  color: var(--color-gray-700);
  font-size: 0.9375rem;
  margin: 0;
  flex-grow: 1;
}

.channel__link {
  color: var(--color-accent-dark);
  font-weight: 700;
  font-size: 13px;
  margin-top: 8px;
}

/* ---------- Legal Page ---------- */
.legal { max-width: 820px; margin: 0 auto; }

.legal h1 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--color-deep-blue);
}

.legal h2 {
  font-size: 1.375rem;
  margin-top: 40px;
  margin-bottom: 12px;
  color: var(--color-deep-blue);
}

.legal p, .legal ul { color: var(--color-gray-700); }

/* ---------- CTA-Band ---------- */
.cta-band {
  background: linear-gradient(180deg, var(--color-deep-blue) 0%, var(--color-deep-blue-2) 100%);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.cta-band h2 {
  color: #fff;
  font-size: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 24px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #082253;
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 0 32px;
  margin-top: 0;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.site-footer h3 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  margin-bottom: 14px;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  text-decoration: none;
}

.site-footer a:hover { color: var(--color-accent-light); text-decoration: none; }

.site-footer__brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 400px;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}

/* ---------- Scroll-to-top ---------- */
.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 30;
}

.scroll-top.is-visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: var(--color-accent-dark); transform: translateY(-2px); }

/* ===========================================================================
   Responsive
   =========================================================================== */

@media (max-width: 960px) {
  .hero__grid { grid-template-columns: 1fr; }
  .brands-grid { grid-template-columns: 1fr; }
  .author { grid-template-columns: 1fr; }
  .author__photo { max-width: 320px; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .site-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px 24px;
    border-bottom: 1px solid var(--color-gray-100);
    box-shadow: 0 8px 16px rgba(20, 20, 19, 0.08);
    display: none;
  }

  .site-nav.is-open { display: flex; }

  .site-nav a {
    padding: 14px 8px;
    border-bottom: 1px solid var(--color-gray-50);
    font-size: 16px;
    white-space: normal;
  }
  .site-nav a[aria-current="page"]::after { display: none; }

  .nav-toggle { display: inline-flex; }

  .site-header__cta { display: none; }
}

@media (max-width: 720px) {
  .hero { padding: 64px 0 48px; }
  .section { padding: 56px 0; }

  .site-footer__grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 420px) {
  :root { --container-padding: 16px; }
  .btn { padding: 12px 20px; font-size: 14px; }
  .hero__ctas { flex-direction: column; align-items: stretch; }
  .hero__ctas .btn { width: 100%; }
  .equation__row { font-size: 0.9375rem; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .site-footer, .scroll-top, .nav-toggle { display: none; }
  body { color: #000; }
}

/* ---------- Reduzierte Animation ---------- */
@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;
  }
}