:root {
  --primary: #000000;
  --primary-dark: #000000;
  --accent: #0077B6;
  --accent-hover: #005a8a;
  --warning: #FFD166;
  --bg-primary: #FFFFFF;
  --bg-secondary: #E9ECEF;
  --bg-card: #FFFFFF;
  --text-primary: #000000;
  --text-secondary: #333333;
  --border-color: #E9ECEF;
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Source Code Pro', monospace;
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s ease;
}

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

*:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

html {
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.flex {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.flex-column {
  flex-direction: column;
}

.flex-center {
  justify-content: center;
}

.flex-between {
  justify-content: space-between;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.section-spacing {
  padding: 4rem 0;
}

.section-spacing-large {
  padding: 6rem 0;
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 {
  animation-delay: 0.1s;
}

.stagger-2 {
  animation-delay: 0.2s;
}

.stagger-3 {
  animation-delay: 0.3s;
}

.tech-note {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--bg-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  display: inline-block;
}

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

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .section-spacing {
    padding: 2rem 0;
  }
  
  .section-spacing-large {
    padding: 3rem 0;
  }
  
  .grid {
    gap: 1.5rem;
  }
  
  .flex {
    gap: 0.75rem;
  }
}