/* ============================================================================
   KI-DAY 2026 - Main Stylesheet (UMZ BRAND KONFORM)
   ============================================================================
   Referenz: ht.umz.app
   Brand: #1D6795 Petrol Blue, Arial/Helvetica, Animierter Gradient
   Layout: Zentrierte Cards auf Gradient-Hintergrund
   ============================================================================ */

/* === RESET & BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #4b5563;
  overflow-x: hidden;
}

/* === UTILITY CLASSES (Tailwind-inspired) === */
.min-h-screen {
  min-height: 100vh;
}

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.max-w-7xl {
  max-width: 1280px;
}

.max-w-4xl {
  max-width: 56rem;
}

.max-w-3xl {
  max-width: 48rem;
}

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-20 {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.py-16 {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.py-12 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.p-8 {
  padding: 2rem;
}

.p-6 {
  padding: 1.5rem;
}

.bg-white {
  background-color: #ffffff;
}

.bg-gray-50 {
  background-color: #f9fafb;
}

.rounded-3xl {
  border-radius: 24px;
}

.rounded-2xl {
  border-radius: 16px;
}

.rounded-xl {
  border-radius: 12px;
}

.rounded-lg {
  border-radius: 8px;
}

.shadow-xl {
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

.shadow-lg {
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.shadow-md {
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

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

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.gap-8 {
  gap: 2rem;
}

.gap-6 {
  gap: 1.5rem;
}

.gap-4 {
  gap: 1rem;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.space-y-8 > * + * {
  margin-top: 2rem;
}

.space-y-4 > * + * {
  margin-top: 1rem;
}

.space-y-2 > * + * {
  margin-top: 0.5rem;
}

.mb-12 {
  margin-bottom: 3rem;
}

.mb-8 {
  margin-bottom: 2rem;
}

.mb-6 {
  margin-bottom: 1.5rem;
}

.mb-4 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 0.75rem;
}

.mb-2 {
  margin-bottom: 0.5rem;
}

.mb-1 {
  margin-bottom: 0.25rem;
}

.mt-12 {
  margin-top: 3rem;
}

.mt-4 {
  margin-top: 1rem;
}

.mt-2 {
  margin-top: 0.5rem;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.w-full {
  width: 100%;
}

.w-10 {
  width: 2.5rem;
}

.h-10 {
  height: 2.5rem;
}

.w-5 {
  width: 1.25rem;
}

.h-5 {
  height: 1.25rem;
}

.aspect-square {
  aspect-ratio: 1 / 1;
}

.object-cover {
  object-fit: cover;
}

.overflow-hidden {
  overflow: hidden;
}

.border {
  border-width: 1px;
}

.border-t {
  border-top-width: 1px;
}

.border-l-4 {
  border-left-width: 4px;
}

.border-gray-100 {
  border-color: #f3f4f6;
}

.border-gray-200 {
  border-color: #e5e7eb;
}

.border-gray-300 {
  border-color: #d1d5db;
}

.text-5xl {
  font-size: 3rem;
  line-height: 1;
}

.text-4xl {
  font-size: 2.25rem;
  line-height: 2.5rem;
}

.text-2xl {
  font-size: 1.5rem;
  line-height: 2rem;
}

.text-xl {
  font-size: 1.25rem;
  line-height: 1.75rem;
}

.text-lg {
  font-size: 1.125rem;
  line-height: 1.75rem;
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.25rem;
}

.text-gray-900 {
  color: #111827;
}

.text-gray-700 {
  color: #374151;
}

.text-gray-600 {
  color: #4b5563;
}

.text-gray-500 {
  color: #6b7280;
}

.text-white {
  color: #ffffff;
}

.text-blue-600 {
  color: #2563eb;
}

.text-blue-700 {
  color: #1d4ed8;
}

.text-red-500 {
  color: #ef4444;
}

.leading-relaxed {
  line-height: 1.75;
}

.uppercase {
  text-transform: uppercase;
}

.tracking-wider {
  letter-spacing: 0.05em;
}

.list-disc {
  list-style-type: disc;
}

.list-inside {
  list-style-position: inside;
}

.underline {
  text-decoration: underline;
}

.transition-colors {
  transition-property: color, background-color, border-color;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

.transition-shadow {
  transition-property: box-shadow;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 300ms;
}

.transition-all {
  transition-property: all;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 300ms;
}

.hover\:shadow-xl:hover {
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

.hover\:shadow-lg:hover {
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.grayscale {
  filter: grayscale(100%);
}

.hover\:grayscale-0:hover {
  filter: grayscale(0%);
}

/* === NAVIGATION === */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  max-width: 1280px;
  margin: 0 auto;
}

.nav-logo .logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1D6795;
  text-decoration: none;
}

.nav-menu {
  display: none;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  color: #374151;
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 150ms;
}

.nav-menu a:hover {
  color: #1D6795;
  background-color: #f3f4f6;
}

.nav-menu .nav-cta {
  background-color: #1D6795;
  color: white;
}

.nav-menu .nav-cta:hover {
  background-color: #164e6f;
}

.nav-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #374151;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: #374151;
  transition: all 200ms;
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  top: 7px;
}

/* === ANIMATE BOUNCE === */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.animate-bounce {
  animation: bounce 2s infinite;
}

/* === RESPONSIVE === */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
  }

  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .md\:flex-row {
    flex-direction: row;
  }

  .md\:items-center {
    align-items: center;
  }

  .md\:items-start {
    align-items: flex-start;
  }

  .md\:text-6xl {
    font-size: 3.75rem;
    line-height: 1;
  }

  .md\:text-5xl {
    font-size: 3rem;
    line-height: 1;
  }

  .md\:text-4xl {
    font-size: 2.25rem;
    line-height: 2.5rem;
  }

  .md\:text-2xl {
    font-size: 1.5rem;
    line-height: 2rem;
  }

  .md\:p-16 {
    padding: 4rem;
  }

  .md\:p-12 {
    padding: 3rem;
  }

  .md\:w-32 {
    width: 8rem;
  }

  .md\:grid-cols-5 {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lg\:text-7xl {
    font-size: 4.5rem;
    line-height: 1;
  }
}

/* === CUSTOM COMPONENTS === */
.bg-gradient-to-br {
  background-image: linear-gradient(to bottom right, var(--tw-gradient-stops));
}

.bg-gradient-to-r {
  background-image: linear-gradient(to right, var(--tw-gradient-stops));
}

.from-blue-50 {
  --tw-gradient-from: #eff6ff;
  --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(239, 246, 255, 0));
}

.to-blue-100 {
  --tw-gradient-to: #dbeafe;
}

/* Form Inputs */
input[type="text"],
input[type="email"],
input[type="checkbox"] {
  font-family: Arial, Helvetica, sans-serif;
}

input:focus {
  outline: none;
}

/* Smooth scrolling to sections */
html {
  scroll-padding-top: 80px;
}

/* Links */
a {
  text-decoration: none;
}

/* Buttons */
button {
  font-family: Arial, Helvetica, sans-serif;
  cursor: pointer;
}

/* Flex utilities */
.items-start {
  align-items: flex-start;
}

.flex-1 {
  flex: 1 1 0%;
}

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

.gap-3 {
  gap: 0.75rem;
}

.gap-2 {
  gap: 0.5rem;
}

.pt-8 {
  padding-top: 2rem;
}

.max-h-24 {
  max-height: 6rem;
}

.max-h-16 {
  max-height: 4rem;
}

.max-h-12 {
  max-height: 3rem;
}

.mt-1 {
  margin-top: 0.25rem;
}

.rounded-full {
  border-radius: 9999px;
}

.bg-gray-200 {
  background-color: #e5e7eb;
}

.hover\:bg-gray-50:hover {
  background-color: #f9fafb;
}

.hover\:text-blue-700:hover {
  color: #1d4ed8;
}

.focus\:ring-2:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.focus\:ring-blue-500:focus {
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.focus\:border-transparent:focus {
  border-color: transparent;
}

.rounded {
  border-radius: 0.25rem;
}

.text-blue-600 {
  color: #2563eb;
}

.opacity-90 {
  opacity: 0.9;
}