@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=Inter:wght@300;400;500;600&display=swap');

:root {
  /* Color Palette */
  --color-primary: #0A2540; /* Deep Navy - solid engineering */
  --color-secondary: #00D4FF; /* Clear Aqua - water/environment */
  --color-accent: #007BFF; /* Bright Blue */
  --color-bg: #FFFFFF; /* Crisp White */
  --color-surface: #F7FAFC; /* Slate Light */
  --color-text-main: #2D3748;
  --color-text-muted: #718096;
  
  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Layout */
  --max-width: 1200px;
  --section-padding: 6rem 2rem;
  
  /* Shadows & Effects */
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 40px rgba(0, 123, 255, 0.15);
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: 1px solid rgba(255, 255, 255, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, .nav-logo {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 600; margin-bottom: 2rem; }
h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 1rem; }
p { font-size: 1.125rem; color: var(--color-text-muted); margin-bottom: 1.5rem; }

/* Layout Utilites */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

section {
  padding: var(--section-padding);
}

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

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.5rem 2rem;
  transition: var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--glass-border);
  box-shadow: var(--shadow-sm);
  padding: 1rem 2rem;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.nav-logo img {
  height: 40px;
  width: auto;
  transition: var(--transition-normal);
}

.nav-logo img.brand-name {
  height: 22px;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 500;
  font-size: 1rem;
  position: relative;
  transition: var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-secondary);
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(rgba(10, 37, 64, 0.65), rgba(10, 37, 64, 0.85)), url('https://static.wixstatic.com/media/e3cb7b_b417a9716df94c87848a8e70f6df3675.jpg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  padding-top: 80px;
}

.hero::absolute-bg {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80vw;
  height: 80vw;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, rgba(255,255,255,0) 70%);
  border-radius: 50%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero p.subtitle {
  font-size: 1.25rem;
  color: var(--color-text-main);
  font-weight: 500;
  margin-top: 1.5rem;
  max-width: 600px;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

/* Cards */
.card {
  background: var(--color-bg);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  border: 1px solid rgba(0,0,0,0.03);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 123, 255, 0.1);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-normal);
}

.card:hover::before {
  transform: scaleX(1);
}

.icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: rgba(0, 212, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--color-accent);
}

.icon-wrapper svg {
  width: 32px;
  height: 32px;
}

/* Specific Sections */
.bg-surface {
  background-color: var(--color-surface);
}

.solutions-wrapper {
  margin-top: 4rem;
}

/* Reference Image Cards */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.ref-card {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.ref-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

.ref-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-normal);
}

.ref-card:hover img {
  transform: scale(1.05);
}

.ref-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 37, 64, 0.9) 0%, rgba(10, 37, 64, 0.2) 100%);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
  transition: var(--transition-normal);
}

.ref-card:hover .ref-overlay {
  background: linear-gradient(to top, rgba(10, 37, 64, 0.95) 0%, rgba(10, 37, 64, 0.4) 100%);
}

.ref-title {
  color: white;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0;
  transform: translateY(10px);
  transition: var(--transition-normal);
}

.ref-card:hover .ref-title {
  transform: translateY(0);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 37, 64, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg);
  width: 90%;
  max-width: 600px;
  border-radius: 1.5rem;
  padding: 3rem;
  position: relative;
  transform: translateY(20px) scale(0.95);
  transition: var(--transition-normal);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
  line-height: 1;
}

.modal-close:hover {
  color: var(--color-primary);
  transform: rotate(90deg);
}

.modal-body h3 {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-surface);
}

.modal-body ul {
  list-style: none;
  margin-bottom: 1.5rem;
}

.modal-body li {
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
}

.modal-body strong {
  color: var(--color-primary);
  min-width: 140px;
}

/* Footer */
footer {
  background: var(--color-primary);
  color: white;
  padding: 4rem 2rem 2rem;
  text-align: center;
}

footer p {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  margin-top: 2rem;
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Responsive */
@media (max-width: 900px) {
  .grid-2 { grid-template-columns: 1fr; gap: 2rem; }
  .ref-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; /* simple mobile menu fallback needed if desired, or just show */ }
}