/* Design Tokens */
:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-surface: #f7f8fa;
  --color-text: #0b1220;
  --color-text-muted: #5b6472;
  --color-border: #e5e7eb;
  --color-primary: #0A84FF;
  --color-primary-hover: #0066dd;
  --color-primary-focus: #004fb0;
  --color-secondary: #0BB5A7;
  --color-success: #16a34a;
  --color-warning: #ca8a04;
  --color-danger: #dc2626;
  --color-focus-ring: #94c6ff;

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol;
  --font-display: Inter, var(--font-system);
  --h1: clamp(2.4rem, 2vw + 1.8rem, 3.5rem);
  --h2: clamp(1.8rem, 1.2vw + 1.4rem, 2.4rem);
  --h3: clamp(1.4rem, 0.8vw + 1.1rem, 1.8rem);
  --body: 1rem;
  --small: 0.9375rem;
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;

  /* Radius */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Shadows */
  --shadow-soft: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lift: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-focus: 0 0 0 3px rgba(10,132,255,0.25);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  /* Motion */
  --duration-fast: 120ms;
  --duration-base: 180ms;
  --duration-slow: 220ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emphasized: cubic-bezier(0.3, 0, 0, 1);
}

/* Base Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html { overflow-y: scroll; }
/* Do not force-scroll lock globally; allow page to remain scrollable */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--body);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Layout Utilities */
.container {
  width: min(1120px, 92%);
  margin-inline: auto;
}
.stack > * + * { margin-top: var(--space-lg); }
.cluster { display: flex; align-items: center; gap: var(--space-md); }
.grid {
  display: grid;
  gap: var(--space-xl);
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

/* Typography */
h1, h2, h3 { line-height: var(--leading-tight); letter-spacing: -0.02em; margin: 0 0 var(--space-md); }
h1 { font-size: var(--h1); }
h2 { font-size: var(--h2); }
h3 { font-size: var(--h3); }
p { color: var(--color-text-muted); margin: 0 0 var(--space-md); }

/* Links & Buttons */
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible, [role="button"]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-secondary {
  background: var(--color-secondary);
  color: #04221f;
}
.btn-outline {
  background: transparent;
  border-color: var(--color-border);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* Header / Nav */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #f7f8fa;
  border-bottom: 1px solid var(--color-border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 0.9rem 0; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; font-weight: 700; letter-spacing: -0.02em; color: var(--color-text); }
.brand-logo { height: 28px; width: auto; display: block; }
@media (min-width: 960px) { .brand-logo { height: 32px; } }
.brand-name { font-size: 1.05rem; line-height: 1; white-space: nowrap; }
@media (min-width: 960px) { .brand-name { font-size: 1.1rem; } }
.nav-links { display: none; align-items: center; gap: 1rem; }
.nav-cta { margin-left: 0.75rem; }
.menu-toggle { background: transparent; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0.5rem 0.7rem; }
/* Emphasize Kontakt link in header */
.nav-links .nav-contact {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.9rem;
  margin-left: 0.25rem;
  border: 1.5px solid var(--color-primary);
  border-radius: 999px;
  color: var(--color-primary);
  font-weight: 600;
  transition: background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard);
}
.nav-links .nav-contact:hover { background: var(--color-primary); color: #fff; }
.overlay .nav-contact { border-color: var(--color-primary); color: var(--color-primary); }
.overlay .nav-contact:hover { background: var(--color-primary); color: #fff; }

@media (min-width: 960px) {
  .nav-links { display: flex; }
  .menu-toggle { display: none; }
  .hamburger { display: none !important; }
}

.mobile-menu { display: none; }
.mobile-menu a { display: block; }
.mobile-menu.open { display: block; }

/* Premium Hamburger */
.hamburger {
  display: inline-grid;
  grid-auto-flow: row;
  grid-template-rows: repeat(3, 4px);
  align-content: center;
  justify-items: center;
  width: 44px; height: 44px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(255,255,255,0.55);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px) saturate(160%);
  transition: box-shadow var(--duration-base) var(--ease-standard), background-color var(--duration-base) var(--ease-standard);
}
.hamburger .bar {
  display: block;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-emphasized), opacity var(--duration-fast) var(--ease-standard);
  will-change: transform, opacity;
}
.hamburger .top { transform-origin: 10% 50%; }
.hamburger .bottom { transform-origin: 10% 50%; }
.hamburger[aria-expanded="true"] .top { transform: translateY(6px) rotate(45deg); }
.hamburger[aria-expanded="true"] .middle { opacity: 0; width: 0; }
.hamburger[aria-expanded="true"] .bottom { transform: translateY(-6px) rotate(-45deg); }
.hamburger:focus-visible { outline: none; box-shadow: var(--shadow-focus); }

/* Overlay mobile menu */
.overlay {
  position: fixed;
  inset: 0;
  padding: 24px;
  background:
    radial-gradient(60% 60% at 20% 0%, rgba(10,132,255,0.10), transparent 70%),
    radial-gradient(60% 60% at 80% 0%, rgba(11,181,167,0.10), transparent 70%),
    #ffffff; /* Solid base to prevent see-through */
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-top: 1px solid var(--color-border);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--ease-emphasized), visibility 0s linear var(--duration-slow);
  height: 100svh; /* iOS Safari small viewport */
  min-height: 100dvh; /* Fallback */
  overflow-y: auto; /* Allow overlay to scroll independently of page */
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  will-change: opacity;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  transform: translateY(-6px);
  padding-top: calc(env(safe-area-inset-top, 0px) + 84px);
}
.overlay.open { opacity: 1; visibility: visible; pointer-events: auto; transition: opacity var(--duration-slow) var(--ease-emphasized); transform: translateY(0); position: fixed; }
.overlay a {
  padding: 0.9rem 0;
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  color: var(--color-text);
  transition: color var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard);
}
.overlay .btn { margin-top: 0.6rem; width: 100%; }
.overlay a:hover { color: var(--color-primary); }
.overlay a:active { transform: translateY(1px); }

/* Subtle staggered entrance */
.overlay.open a { animation: linkFade var(--duration-slow) var(--ease-emphasized) both; }
.overlay.open a:nth-of-type(1) { animation-delay: 40ms; }
.overlay.open a:nth-of-type(2) { animation-delay: 90ms; }
.overlay.open a:nth-of-type(3) { animation-delay: 140ms; }
.overlay.open a:nth-of-type(4) { animation-delay: 190ms; }
@keyframes linkFade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  .overlay.open a { animation: none; }
}

/* Overlay close (X) */
.overlay-close {
  position: absolute;
  top: 20px; right: 20px;
  width: 44px; height: 44px;
  border: none;
  border-radius: 999px;
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(10px) saturate(160%);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
}
.overlay-close::before,
.overlay-close::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 22px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transform-origin: center;
}
.overlay-close::before { transform: translate(-50%, -50%) rotate(45deg); }
.overlay-close::after { transform: translate(-50%, -50%) rotate(-45deg); }
.overlay-close:focus-visible { outline: none; box-shadow: var(--shadow-focus); }

/* Prevent scroll when menu is open */
body.menu-open { overflow: hidden; }

.site-header.scrolled { border-bottom-color: var(--color-border); box-shadow: var(--shadow-soft); }

/* Hero */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  background:
    radial-gradient(60% 60% at 20% 0%, rgba(10,132,255,0.10) 0%, transparent 70%),
    radial-gradient(60% 60% at 80% 0%, rgba(11,181,167,0.10) 0%, transparent 70%);
}
.hero .headline { max-width: 20ch; }
.hero .subhead { max-width: 55ch; }
.hero-card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}
.hero-media { aspect-ratio: 16/9; background: radial-gradient(60% 80% at 50% 0%, rgba(10,132,255,0.08) 0%, rgba(11,181,167,0.08) 50%, transparent 100%); }

/* Cards */
.card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-xl); box-shadow: var(--shadow-soft); }
.card h3 { margin-bottom: 0.4rem; }
.glass { background: rgba(255,255,255,0.65); backdrop-filter: blur(8px); }

/* Testimonials */
.testimonial { display: flex; flex-direction: column; gap: var(--space-sm); }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--color-surface); border: 1px solid var(--color-border); display: inline-flex; align-items: center; justify-content: center; font-weight: 700; }

/* Pricing */
.pricing { background: linear-gradient(180deg, #f9fbff 0%, #ffffff 100%); border: 1px solid var(--color-border); border-radius: var(--radius-xl); box-shadow: var(--shadow-soft); }
.price { font-size: 2rem; font-weight: 700; }

/* Illustration panel */
.illustration-box {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lift);
  padding: var(--space-md);
}
.illustration-box img { display: block; width: 100%; height: auto; }

/* Themed bullets for brand lists */
.bullets-brand { list-style: none; margin: 0; padding: 0; }
.bullets-brand li {
  position: relative;
  padding-left: 1.4rem;
}
.bullets-brand li + li { margin-top: 0.45rem; }
.bullets-brand li::before {
  content: "";
  position: absolute; left: 0; top: 0.55em;
  width: 0.5rem; height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary);
}

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); padding: var(--space-2xl) 0; margin-top: var(--space-3xl); background: #fff; }
.footer-grid { display: flex; flex-direction: column; gap: var(--space-lg); align-items: flex-start; }
.site-footer.dark { background: #0b1220; color: #e9eef6; border-top-color: rgba(255,255,255,0.08); }
.site-footer.dark a { color: #cfe3ff; }
.site-footer.dark a:hover { color: #ffffff; }
.footer-grid-4 { display: grid; gap: var(--space-2xl); }
@media (min-width: 960px) { .footer-grid-4 { grid-template-columns: 2fr 1fr 1fr 1.2fr; } }
.footer-title { font-weight: 700; margin: 0 0 var(--space-sm); color: #ffffff; }
.footer-brand { font-size: 1.25rem; margin: 0 0 var(--space-sm); color: #ffffff; }
.footer-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.footer-social .social { width: 40px; height: 40px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; background: rgba(255,255,255,0.06); color: #e9eef6; border: 1px solid rgba(255,255,255,0.1); transition: background var(--duration-fast) var(--ease-standard), transform var(--duration-fast) var(--ease-standard); }
.footer-social .social:hover { background: rgba(255,255,255,0.12); transform: translateY(-1px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: var(--space-xl); padding-top: var(--space-lg); }
.footer-bottom-inner { display: flex; flex-direction: column; gap: 0.5rem; align-items: flex-start; justify-content: space-between; }
@media (min-width: 768px) { .footer-bottom-inner { flex-direction: row; align-items: center; } }

/* Forms */
.field { display: grid; gap: 0.4rem; }
label { font-weight: 600; }
input, textarea, select {
  font: inherit; color: inherit;
  background: #fff;
  border: 1.5px solid #d7dbe3; /* clearer by default */
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02) inset;
}
input:focus-visible, textarea:focus-visible, select:focus-visible { outline: none; box-shadow: var(--shadow-focus); border-color: var(--color-primary); }
input:hover, textarea:hover, select:hover { border-color: #c5cad4; }
.error { color: var(--color-danger); font-size: 0.95rem; }
.help { color: var(--color-text-muted); font-size: 0.95rem; }

/* Alerts / Toasts */
.sr-live { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.toast { position: fixed; right: 1rem; bottom: 1rem; background: #0b1220; color: #fff; padding: 0.9rem 1rem; border-radius: var(--radius-sm); box-shadow: var(--shadow-lift); opacity: 0; transform: translateY(6px); transition: opacity var(--duration-base) var(--ease-standard), transform var(--duration-base) var(--ease-standard); }
.toast.show { opacity: 1; transform: translateY(0); }

/* Modal */
.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.28); display: none; }
.modal-backdrop.open { display: block; }
.modal {
  position: fixed; inset: 0; display: grid; place-items: center; pointer-events: none;
}
.modal.open { pointer-events: auto; }
.dialog {
  width: min(640px, 92%);
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift);
  transform: translateY(8px);
  opacity: 0;
  transition: transform var(--duration-slow) var(--ease-emphasized), opacity var(--duration-slow) var(--ease-emphasized);
}
.modal.open .dialog { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .dialog { transition: none; }
}

/* Accessibility helpers */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Sections spacing */
section { padding: var(--space-2xl) 0; }
.section-accent {
  background:
    linear-gradient(180deg, rgba(10,132,255,0.06), rgba(11,181,167,0.04));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.section-accent h2 { position: relative; display: inline-block; }
.section-accent h2::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -8px;
  height: 3px; border-radius: 2px; background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

/* Shadows on hover for cards/buttons for subtle lift */
.elevate:hover { box-shadow: var(--shadow-lift); }