/*
 * Purpose: Main CSS file for custom styles, colors, typography overrides.
 * Position: /assets/css/style.css
 */
:root {
  /* Brand Primary Accent */
  --primary: #00694E;
  --primary-hover: #00523d;
  
  /* Restrained Neutral Palette */
  --white: #FFFFFF;
  --off-white: #F8F9FA;
  --soft-concrete: #E9ECEF;
  --steel-gray: #6C757D;
  --charcoal: #343A40;
  --graphite: #212529;
  --dark-bg: #121416;

  /* Typography */
  --font-sans: 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Work Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --text-main: var(--charcoal);
  --bg-main: var(--white);
  
  /* Layout */
  --section-padding: 6rem 0;
  --transition-speed: 0.4s;
}

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

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

/* Typography Overrides */
h1, h2, h3, h4, h5, h6, .display-1, .display-2, .display-3, .display-4, .navbar-brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--graphite);
}

.text-primary { color: var(--primary) !important; }
.bg-primary { background-color: var(--primary) !important; }

/* Cinematic Sections */
.section-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--dark-bg);
  color: var(--white);
  overflow: hidden;
  padding-top: 80px; /* offset navbar */
}
.section-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(18, 20, 22, 0.6); /* dark overlay */
  z-index: 1;
}
.section-hero .container {
  position: relative;
  z-index: 2;
}

.section-dark {
  background-color: var(--dark-bg);
  color: var(--off-white);
  padding: var(--section-padding);
}
.section-dark h2, .section-dark h3 {
  color: var(--white);
}
.section-dark .text-muted {
  color: var(--steel-gray) !important;
}

.section-light {
  background-color: var(--bg-main);
  color: var(--text-main);
  padding: var(--section-padding);
}

.section-gray {
  background-color: var(--off-white);
  color: var(--text-main);
  padding: var(--section-padding);
}

/* Premium UI Elements */
.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  padding: 0.75rem 2rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-speed) ease;
  border-radius: 2px;
}
.btn-primary:hover, .btn-primary:focus {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 105, 78, 0.3);
}

.btn-outline-light {
  padding: 0.75rem 2rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 2px;
  transition: all var(--transition-speed) ease;
}

/* Sticky Navbar */
.navbar-premium {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--soft-concrete);
  transition: all var(--transition-speed) ease;
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.navbar-premium.navbar-dark-mode {
  background-color: rgba(18, 20, 22, 0.95);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.navbar-premium.navbar-dark-mode .nav-link {
  color: var(--off-white);
}
.navbar-premium.navbar-dark-mode .navbar-brand {
  color: var(--white);
}

.nav-link {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
  color: var(--charcoal);
  margin: 0 0.5rem;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--primary);
  transition: width var(--transition-speed) ease;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Modular Storytelling & Proof Blocks */
.proof-metric {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.proof-label {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--charcoal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.section-dark .proof-label {
  color: var(--off-white);
}

.feature-card {
  background: var(--white);
  padding: 2.5rem;
  border: 1px solid var(--soft-concrete);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
  height: 100%;
}
.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.05);
  border-color: var(--primary);
}
.section-dark .feature-card {
  background: var(--graphite);
  border-color: rgba(255,255,255,0.05);
}
.section-dark .feature-card:hover {
  box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
}

/* Images & Media */
.img-cinematic {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 2px;
}
.img-container {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.img-container::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.3) 0%, transparent 100%);
  pointer-events: none;
}

/* Subtle Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* Dividers */
.accent-divider {
  width: 60px;
  height: 4px;
  background-color: var(--primary);
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}