/* ==========================================================================
   Base Styles — Retro Film Reel V1 (Classic Diner)
   ========================================================================== */

/* CSS Custom Properties (Brand Tokens) */
:root {
  /* Colors - Primary */
  --color-retro-red: #9b1c1c;
  --color-cream: #f5e9d4;
  --color-teal: #1abc9c;
  --color-black-outline: #111;

  /* Colors - Secondary */
  --color-mustard: #d4a017;
  --color-soft-brown: #6d4528;

  /* Colors - Accent */
  --color-mint: #a3e4d7;

  /* Typography */
  --font-headline: 'Bebas Neue', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --font-ui: 'Nunito', sans-serif;
  --font-code: 'Cousine', monospace;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgb(17, 17, 17, 0.1);
  --shadow-md: 0 4px 8px rgb(17, 17, 17, 0.15);
  --shadow-lg: 0 8px 16px rgb(17, 17, 17, 0.2);
  --shadow-neon: 0 0 20px rgb(192, 57, 43, 0.4);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Reset & Box Sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Reduced Motion */
@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;
  }
}

/* Base Typography */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-black-outline);
  background-color: var(--color-cream);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Scale */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-headline);
  line-height: 1.2;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
}

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

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

/* Focus Styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--color-teal);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Lists */
ul,
ol {
  list-style: none;
}

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

/* Code */
code,
pre {
  font-family: var(--font-code);
  font-size: 0.9em;
}

code {
  background-color: rgb(17, 17, 17, 0.08);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background-color: var(--color-black-outline);
  color: var(--color-cream);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-retro-red);
  color: var(--color-cream);
  font-family: var(--font-ui);
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
}

/* Selection */
::selection {
  background-color: var(--color-retro-red);
  color: var(--color-cream);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-cream);
}

::-webkit-scrollbar-thumb {
  background: var(--color-soft-brown);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-retro-red);
}