@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

:root {
  --color-primary: #1A1A1B;
  --color-secondary: #FDFCFB;
  --color-accent: #2E5BFF;
  --color-text: #1a1a1a;
  --color-text-light: #4b5563;
  --color-bg: #ffffff;
  --color-bg-alt: #f9fafb;
  --font-family: 'Space Grotesk', sans-serif;
  --font-size-base: 18px;
  --line-height-base: 1.7;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
}

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.text-contrast-aa {
  color: var(--color-text);
}

.bg-primary { background-color: var(--color-primary); }
.text-primary { color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.text-secondary { color: var(--color-secondary); }
.bg-accent { background-color: var(--color-accent); }
.text-accent { color: var(--color-accent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #1e4bd8;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

.container-custom {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.article-container {
  max-width: 720px;
  margin: 0 auto;
}

.header-sticky {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26, 26, 27, 0.8) 0%, rgba(26, 26, 27, 0.4) 100%);
}

.grid-asymmetric {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-md);
}

.card {
  background: var(--color-bg);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition-fast);
}

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

.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--space-md);
  z-index: 2000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
}

.nav-link {
  font-weight: 500;
  color: var(--color-primary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-accent);
  transition: var(--transition-base);
}

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

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  height: 100%;
  background: var(--color-primary);
  color: #ffffff;
  z-index: 1500;
  transition: var(--transition-base);
  padding: var(--space-2xl) var(--space-xl);
}

.mobile-menu.active {
  right: 0;
}

.hamburger {
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hamburger span {
  width: 30px;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-base);
}

.input-field {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  transition: var(--transition-base);
}

.input-field:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.1);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.metric-card {
  border-left: 4px solid var(--color-accent);
  padding: var(--space-md);
  background: var(--color-secondary);
}

.accordion-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.accordion-header {
  padding: var(--space-md) 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.accordion-item.active .accordion-content {
  max-height: 500px;
}

.author-box {
  background: var(--color-bg-alt);
  padding: var(--space-xl);
  border-radius: var(--radius-md);
  margin-top: var(--space-2xl);
}

.risk-disclaimer {
  font-size: 0.9rem;
  color: var(--color-text-light);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-top: var(--space-sm);
  margin-top: var(--space-lg);
}

@media (max-width: 768px) {
  :root {
    --font-size-base: 16px;
  }
  
  .grid-asymmetric {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 4rem;
  }
}