:root {
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-text: #111111;
  --color-text-light: #555555;
  --color-text-inverse: #FFFFFF;

  /* Black and White Mountain Theme */
  --color-black: #000000;
  --color-white: #FFFFFF;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;

  /* Blue Highlights */
  --color-primary: #1E40AF;
  /* Deep modern blue */
  --color-primary-light: #3B82F6;
  --color-primary-dark: #1E3A8A;

  --font-primary: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-2xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-secondary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-black);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

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

/* Base Layout & Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-light {
  background-color: var(--color-white);
}

.section-dark {
  background-color: var(--color-black);
  color: var(--color-white);
}

.section-dark h2 {
  color: var(--color-white);
}

/* Grid & Layout Utilities */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2-col {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

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

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

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--spacing-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background-color: var(--color-primary);
}

/* Components */
.feature-box {
  background-color: var(--color-gray-100);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  border-left: 4px solid var(--color-primary);
}

.list-check {
  list-style: none;
  margin-top: var(--spacing-sm);
}

.list-check li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.list-check li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

.img-wrapper {
  position: relative;
  display: inline-block;
}

.img-responsive {
  max-width: 100%;
  height: auto;
}

.rounded-lg {
  border-radius: var(--radius-lg);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

/* Animations Content */
.animate-content-left {
  animation: slideInLeft 1s ease forwards;
}

.animate-content-right {
  animation: slideInRight 1s ease forwards;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-primary);
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-white {
  background-color: var(--color-white);
  color: var(--color-black);
}

.btn-white:hover {
  background-color: var(--color-gray-200);
  color: var(--color-black);
  transform: translateY(-2px);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.8s ease forwards;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo-img {
  height: 50px;
  width: auto;
  object-fit: contain;
  filter: brightness(0);
}

.nav-logo-text {
  font-family: var(--font-primary);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-black);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.nav-logo-text span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  font-family: var(--font-primary);
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.95rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-black);
  cursor: pointer;
}

/* Footer */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer-col h3 {
  color: var(--color-white);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
}

.footer-col p,
.footer-col a {
  color: var(--color-gray-200);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.footer-col a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-gray-400);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    /* Mobile menu handled by JS */
  }

  .mobile-menu-btn {
    display: block;
  }
}