:root {
  --color-primary: #0F172A; /* Deep Navy */
  --color-secondary: #475569; /* Slate Gray */
  --color-accent: #D4AF37; /* Brushed Gold */
  --color-neutral: #F8FAFC; /* Off-White */
  
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 16px;
  --spacing-4: 24px;
  --spacing-5: 32px;
  --spacing-6: 40px; /* dense padding */
  --spacing-7: 48px;
  --spacing-8: 64px;

  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, #B8922A 100%);
  --gradient-overlay: linear-gradient(180deg, rgba(15,23,42,0.8) 0%, rgba(15,23,42,1) 100%);
}

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

body {
  font-family: var(--font-body);
  color: var(--color-primary);
  background-color: var(--color-neutral);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: var(--spacing-3);
  letter-spacing: 0.05em;
}

h1 { font-size: clamp(3rem, 6vw, 5rem); }
h2 { font-size: clamp(2.5rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.8rem, 3vw, 2.5rem); }
p { margin-bottom: var(--spacing-3); font-size: 1.1rem; }

a { color: var(--color-primary); text-decoration: none; font-weight: 600; }
a:hover { color: var(--color-accent); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

/* Button */
.btn {
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-5);
  background: var(--gradient-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  border-radius: 4px;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-transform: uppercase;
  text-decoration: none;
}
.btn:hover, .btn:focus {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(212, 175, 55, 0.4);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-secondary:hover, .btn-secondary:focus {
  background: var(--color-primary);
  color: var(--color-neutral);
}

/* Header */
header {
  position: absolute;
  top: 0; width: 100%; z-index: 100;
  padding: var(--spacing-4) var(--spacing-6);
  display: flex; justify-content: space-between; align-items: center;
}
@media (max-width: 767px) {
  header {
    background-color: var(--color-primary);
  }
}
.logo-img { height: 48px; filter: brightness(0) invert(1); } /* White logo on dark hero */

/* Layout: Split Screen Alternating */
.split-section {
  display: flex;
  border-bottom: 4px solid transparent;
  border-image: var(--gradient-primary) 1;
  flex-direction: column;
  background: var(--color-neutral);
  position: relative;
}
@media (min-width: 768px) {
  .split-section { flex-direction: row; align-items: stretch; min-height: auto; }
  .split-section:nth-child(even) { flex-direction: row-reverse; }
}
.split-content {
  flex: 1;
  padding: clamp(24px, 4vw, 40px); /* dense padding */
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.split-image {
  flex: 1;
  background-size: cover;
  background-position: center;
  min-height: 200px;
  position: relative;
}
.split-image img {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; top: 0; left: 0;
}

/* Geometric Decorative Elements */
.geo-shape {
  position: absolute;
  opacity: 0.1;
  z-index: 0;
}
.geo-circle { width: 100px; height: 100px; border-radius: 50%; border: 4px solid var(--color-primary); }
.geo-dots { background-image: radial-gradient(var(--color-primary) 2px, transparent 2px); background-size: 10px 10px; width: 100px; height: 100px; }
.split-content .geo-circle { top: -20px; right: 20px; }
.split-content .geo-dots { bottom: -20px; left: 20px; }
.split-content > * { position: relative; z-index: 1; }

/* Hero: Full Bleed Image Overlay */
.hero {
  position: relative;
  padding: 140px 40px 80px; min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  background-color: var(--color-primary);
}
.hero-bg {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0;
}
.hero-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: var(--gradient-overlay); z-index: 1;
}
.hero-content {
  position: relative; z-index: 2; max-width: 800px;
}
.hero-content h1 {
  color: #fff;
  margin-bottom: var(--spacing-4);
  text-shadow: 0 4px 12px rgba(0,0,0,0.5);
}
.hero-content p {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-5);
  color: var(--color-neutral);
}

/* Kinetic Typography (Animation) */
.kinetic-text {
  display: inline-block;
  animation: drift 6s infinite alternate ease-in-out;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
@keyframes drift {
  0% { transform: translateY(0px); opacity: 0.8; }
  100% { transform: translateY(-5px); opacity: 1; }
}

/* Specific Sections */
.features-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  margin-top: var(--spacing-5);
}
.feature-item {
  display: flex; gap: var(--spacing-3); align-items: flex-start;
}
.feature-icon {
  width: 64px; height: 64px; flex-shrink: 0;
  border-radius: 8px;
}
.testimonial {
  background-color: #fff;
  border: 1px solid rgba(71, 85, 105, 0.2); /* var(--color-secondary) with opacity */
  border-left: 4px solid var(--color-accent);
  padding: var(--spacing-5);
  margin: var(--spacing-5) 0;
  font-style: italic;
  font-size: 1.2rem;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);
  border-radius: 4px;
}
.testimonial-author {
  font-weight: 600; font-style: normal; margin-top: var(--spacing-2); display: block;
}

/* Footer */
footer {
  background: var(--gradient-primary);
  color: var(--color-neutral);
  padding: var(--spacing-6);
  text-align: center;
}
footer a { color: var(--color-accent); }
footer .footer-links {
  display: flex; justify-content: center; gap: var(--spacing-4);
  margin: var(--spacing-4) 0; flex-wrap: wrap;
}

/* Accessibility: Visible Focus States */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip link visibility on focus */
.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: var(--spacing-2) var(--spacing-3);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background-color: var(--color-primary);
  color: var(--color-neutral);
  z-index: 1000;
  display: block;
  text-align: center;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}