/* Variables */
:root {
  /* Colors */
  --color-background: #1a1a1a; /* Matte black */
  --color-text: #ffffff; /* Crisp white */
  --color-primary: #d32f2f; /* Racing red */
  --color-success: #c0c0c0; /* Metallic silver */
  --color-warning: #ff9800; /* Energetic orange */
  --color-danger: #d32f2f; /* Racing red */
  --color-neutral-100: #f5f5f5; /* Light gray */
  --color-neutral-200: #e0e0e0;
  --color-neutral-300: #bdbdbd;
  --color-neutral-400: #9e9e9e;
  --color-neutral-500: #757575;
  --color-neutral-600: #616161;
  --color-neutral-700: #424242; /* Dark slate */
  --color-neutral-800: #303030;
  --color-neutral-900: #212121;

  /* Typography */
  --font-family-primary: 'Oswald', sans-serif; /* Bold, dynamic */
  --font-family-secondary: 'Roboto', sans-serif; /* Sleek, professional */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing */
  --spacing-0: 0px;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;
  --spacing-24: 96px;

  /* Other */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --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);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
}

/* Reset / Normalize */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, h5, h6, p, blockquote, pre, dl, dd, ol, ul, figure, hr, fieldset, legend {
  margin: 0;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

html {
  scroll-behavior: smooth;
}

/* Base */
body {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-primary);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

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

a:hover, a:focus {
  color: var(--color-success);
}

p {
  margin-bottom: var(--spacing-4);
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.flex {
  display: flex;
}

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

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

.grid {
  display: grid;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
.grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }
}
.gap-4 {
  gap: var(--spacing-4);
}

.gap-6 {
  gap: var(--spacing-6);
}

.gap-8 {
  gap: var(--spacing-8);
}

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

/* Components */
.btn {
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-6);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--color-primary);
  color: var(--color-text);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn:hover {
  background-color: var(--color-danger);
  transform: translateY(-2px);
}

.btn:focus {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input {
  width: 100%;
  padding: var(--spacing-3);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-neutral-800);
  border: 1px solid var(--color-neutral-600);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.card {
  background-color: var(--color-neutral-800);
  padding: var(--spacing-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-xl);
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}