:root {
  --color-primary: #0a192f;
  --color-secondary: #ff4d4d;
  --color-accent: #64ffda;
  --color-bg: #f8f9fa;
  --color-bg-alt: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-white: #ffffff;
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-secondary: 'Playfair Display', serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  --border-radius: 4px;
  --transition-fast: 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-normal: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #1a1a1a;
    --color-text: #e0e0e0;
    --color-text-light: #a0a0a0;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.hero-title { font-size: clamp(3rem, 8vw, 6rem); letter-spacing: -0.02em; }
.section-title { font-size: clamp(2rem, 5vw, 4rem); margin-bottom: var(--spacing-md); }
.text-lead { font-size: 1.25rem; color: var(--color-text-light); }

/* Layout & Grids */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Grid Strategy 1: Asymmetric split */
.grid-asymmetric {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}
@media (min-width: 1024px) {
  .grid-asymmetric { grid-template-columns: 1fr 1.5fr; }
  .grid-asymmetric.reverse { grid-template-columns: 1.5fr 1fr; }
}

/* Grid Strategy 2: Bento Box / Masonry-lite */
.grid-bento {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

/* Grid Strategy 3: Sticky Sidebar */
.grid-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 1024px) {
  .grid-sidebar {
    grid-template-columns: 300px 1fr;
    align-items: start;
  }
  .grid-sidebar > aside { position: sticky; top: var(--spacing-lg); }
}

/* Components */
.header {
  position: fixed;
  top: 0; width: 100%;
  padding: var(--spacing-sm) 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  z-index: 100;
  transition: transform var(--transition-normal);
}
.header.scrolled-down { transform: translateY(-100%); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.nav-links { display: flex; gap: var(--spacing-md); list-style: none; }
.nav-links a { text-decoration: none; color: var(--color-primary); font-weight: 500; transition: color var(--transition-fast); }
.nav-links a:hover { color: var(--color-secondary); }

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover;
  z-index: -1;
  opacity: 0.15;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border: none;
}
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

/* Sections */
section { padding: var(--spacing-xl) 0; }
.section-light { background-color: var(--color-bg-alt); }
.section-dark { background-color: var(--color-primary); color: var(--color-white); }
.section-dark h2, .section-dark h3 { color: var(--color-white); }

/* Card */
.card {
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}
.card-img { width: 100%; height: 240px; object-fit: cover; }
.card-body { padding: var(--spacing-md); }

/* Footer */
footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}
.footer-links { list-style: none; }
.footer-links a { color: var(--color-text-light); text-decoration: none; }
.footer-links a:hover { color: var(--color-white); }

/* Effects Utilities */
.reveal-up { opacity: 0; transform: translateY(40px); transition: opacity var(--transition-slow), transform var(--transition-slow); }
.reveal-up.is-visible { opacity: 1; transform: translateY(0); }

.hover-field { position: relative; }
.hover-field-bg { position: absolute; background: var(--color-bg); border-radius: var(--border-radius); z-index: -1; transition: all 0.3s ease; pointer-events: none; opacity: 0; }

.parallax-layer { will-change: transform; }

.magnetic-wrap { display: inline-block; }

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