:root {

  --color-primary-blue: #001F3F;
  --color-secondary-blue: #0074D9;
  --color-accent-purple: #7B2CBF;
  --color-accent-green: #39CCCC;
  --color-charcoal-grey: #1a1a1a;
  --color-white: #FFFFFF;
  --color-light-grey: #F8F9FA;
  --color-dark-grey: #495057;
  --color-text-light: #F8F9FA;
  --color-text-dark: #212529;

  --font-family-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-heading: 'Orbitron', 'Courier New', monospace;
  --font-size-h1: clamp(2.5rem, 5vw, 4rem);
  --font-size-h2: clamp(2rem, 4vw, 3rem);
  --font-size-h3: clamp(1.75rem, 3.5vw, 2.5rem);
  --font-size-h4: clamp(1.5rem, 3vw, 2rem);
  --font-size-h5: clamp(1.25rem, 2.5vw, 1.5rem);
  --font-size-h6: clamp(1.125rem, 2vw, 1.25rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  --line-height-body: 1.6;
  --line-height-heading: 1.2;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
  --shadow-neon: 0 0 10px rgba(123, 44, 191, 0.5);

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  padding-top: 80px; /* Space for fixed navbar */
  font-family: var(--font-family-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-dark);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: 700;
  margin-top: 0;
  margin-bottom: var(--space-md);
  line-height: var(--line-height-heading);
}

p {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

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

a:hover,
a:focus {
  color: var(--color-accent-purple);
  outline: 2px solid var(--color-accent-purple);
  outline-offset: 2px;
}

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

ul, ol {
  margin: 0;
  padding-left: var(--space-lg);
}

li {
  margin-bottom: var(--space-xs);
}

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
}

input, textarea, select {
  font-family: inherit;
  border: 1px solid var(--color-light-grey);
  border-radius: var(--border-radius);
  padding: var(--space-sm);
  transition: border-color var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent-purple);
  box-shadow: 0 0 0 2px rgba(123, 44, 191, 0.2);
}



h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary-blue);
}

.section-dark, .section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4, .section-dark h5, .section-dark h6, .section-dark p {
  color: var(--color-text-light);
}

.section-dark {
  background-color: var(--color-charcoal-grey);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }
h5 { font-size: var(--font-size-h5); }
h6 { font-size: var(--font-size-h6); }

.lead {
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.5;
}

.small {
  font-size: var(--font-size-small);
}

.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

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

.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.align-stretch { align-items: stretch; }

.custom-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  border: 2px solid var(--color-primary-blue);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-accent-purple);
  border-color: var(--color-accent-purple);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-blue);
  border: 2px solid var(--color-primary-blue);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-primary-blue);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-accent {
  background-color: var(--color-accent-purple);
  color: var(--color-white);
  border: 2px solid var(--color-accent-purple);
}

.btn-accent:hover,
.btn-accent:focus {
  background-color: var(--color-accent-green);
  border-color: var(--color-accent-green);
  box-shadow: var(--shadow-neon);
}

.card-custom {
  background: var(--color-white);
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card-custom:hover,
.card-custom:focus-within {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-header-custom {
  padding: var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary-blue), var(--color-secondary-blue));
  color: var(--color-white);
}

.card-body-custom {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-footer-custom {
  padding: var(--space-lg);
  border-top: 1px solid var(--color-light-grey);
}

.row[class*='g-'] > [class*='col-']:has([class*='card']) { 
  display: flex !important; 
  flex-direction: column !important; 
}
[class*='card'] { 
  flex: 1; 
  display: flex; 
  flex-direction: column; 
  height: 100%; 
}

.navbar-custom {
  background: rgba(0, 31, 63, 0.98);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-sm) 0;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1030;
}

.navbar-custom.scrolled {
  background: rgba(0, 31, 63, 0.99);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.navbar-brand-custom {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
}

.navbar-nav .nav-link {
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md) !important;
  transition: color var(--transition-fast);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--color-accent-purple);
}

.footer-custom {
  background: var(--color-charcoal-grey);
  color: var(--color-white);
  padding: var(--space-xl) 0;
}

.footer-custom a {
  color: var(--color-secondary-blue);
}

.footer-custom a:hover {
  color: var(--color-accent-purple);
}

.form-group-custom {
  margin-bottom: var(--space-md);
}

.form-control-custom {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-light-grey);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast);
}

.form-control-custom:focus {
  border-color: var(--color-accent-purple);
  box-shadow: 0 0 0 0.2rem rgba(123, 44, 191, 0.25);
}

.hero-custom {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-blue), var(--color-charcoal-grey));
  color: var(--color-white);
  text-align: center;
  overflow: hidden;
}

.hero-custom::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23FFFFFF" stop-opacity="0.1"/><stop offset="100%" stop-color="%23007BFF" stop-opacity="0"/></radialGradient></defs><circle cx="20" cy="20" r="2" fill="url(%23a)"/><circle cx="80" cy="80" r="1.5" fill="url(%23a)"/><circle cx="50" cy="10" r="1" fill="url(%23a)"/></svg>') repeat;
  animation: float 20s ease-in-out infinite;
  opacity: 0.1;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.gallery-item {
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.gallery-item:hover {
  transform: scale(1.05);
}

@media (min-width: 768px) {
  .container-custom {
    padding: 0 var(--space-lg);
  }
  
  .d-md-flex { display: flex !important; }
  .justify-md-center { justify-content: center !important; }
}

@media (min-width: 1024px) {
  .container-custom {
    padding: 0 var(--space-xl);
  }
  
  .custom-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

@media (max-width: 767px) {
  body {
    padding-top: 70px; /* Smaller space for mobile navbar */
  }

  .navbar-custom {
    padding: var(--space-xs) 0;
  }

  .navbar-nav {
    text-align: center;
    background: rgba(0, 31, 63, 0.98);
    margin-top: var(--space-sm);
    border-radius: var(--border-radius);
    padding: var(--space-md);
  }

  .navbar-collapse {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .navbar-collapse.show {
    max-height: 300px;
  }

  .hero-custom {
    min-height: 80vh;
    padding: var(--space-lg) 0;
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
}

* {
  transition: all var(--transition-fast);
}

.btn, .card-custom, .nav-link, .gallery-item {
  transition: all var(--transition-normal);
}

*:focus-visible {
  outline: 2px solid var(--color-accent-purple);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: no-preference) {
  .animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
  }

  .animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
  }
}

.hidden { display: none !important; }
.visible { display: block !important; }
.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;
}