/* ==========================================================================
   Critical CSS - Above-the-fold styles for optimal LCP
   Diamond Performance
   ========================================================================== */

/* CSS Variables - Essential only */
:root {
  --color-primary: #e63946;
  --color-secondary: #0a0a0a;
  --color-dark: #0d0d0d;
  --color-white: #ffffff;
  --color-text: #e8e8e8;
  --color-gray-900: #111111;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --text-base: 1rem;
  --text-sm: 0.875rem;
  --text-xl: 1.25rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --font-normal: 400;
  --font-semibold: 600;
  --font-bold: 700;
  --leading-normal: 1.5;
  --leading-tight: 1.1;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --header-height: 80px;
  --header-height-scrolled: 70px;
  --radius-md: 8px;
  --radius-full: 9999px;
  --z-fixed: 300;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --tracking-wider: 0.05em;
  --gradient-red: linear-gradient(135deg, #e63946 0%, #9d0208 100%);
  --container-xl: 1200px;
}

/* Reset - Critical */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-dark);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { background: none; border: none; cursor: pointer; }

/* Header - Critical for LCP */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  height: var(--header-height);
  transition: all var(--transition-base);
}
.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.header.scrolled::before { opacity: 1; }
.header.scrolled { height: var(--header-height-scrolled); }
.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.header__logo {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.header__logo img {
  height: 45px;
  width: auto;
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.6));
}
.header__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-white);
  white-space: nowrap;
}
.header__logo-text span { color: var(--color-primary); }
.nav { display: none; position: relative; z-index: 1; }
@media (min-width: 1024px) {
  .nav { display: flex; align-items: center; gap: var(--space-8); }
}
.nav__list { display: flex; align-items: center; gap: var(--space-8); }
.nav__link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-2) 0;
}
.header__actions {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 30px;
  height: 30px;
  cursor: pointer;
}
@media (min-width: 1024px) { .mobile-menu-toggle { display: none; } }
.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-white);
  border-radius: 2px;
}

/* Button - Critical */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
}
.btn--primary {
  background: var(--gradient-red);
  color: var(--color-white);
  border: none;
}

/* Hero Section - Critical for LCP */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(15, 15, 15, 0.98) 100%);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

/* Hide mobile elements on load */
@media (max-width: 480px) {
  .header__logo-text { display: none; }
  .header__logo img { height: 38px; }
  .header__actions .btn { display: none; }
}

/* Skeleton loading state */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-900) 25%, #1a1a1a 50%, var(--color-gray-900) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}
@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}