/* MR4 — MudRock 4x4 Design System */
/* global.css — Custom properties, reset, typography, utilities */

@import url('https://fonts.googleapis.com/css2?family=Jost:wght@400;500;600;700;800;900&display=swap');

/* ========== CUSTOM PROPERTIES ========== */
:root {
  /* Brand Colors — Red, White & Blue */
  --color-navy: #1b2a4a;
  --color-navy-light: #253a5e;
  --color-navy-dark: #0f1b33;
  --color-red: #b91c1c;
  --color-red-dark: #991b1b;
  --color-red-light: #dc2626;
  --color-blue: #1e3a6e;
  --color-blue-light: #2563eb;
  --color-amber: #b91c1c;
  --color-amber-light: #dc2626;
  --color-amber-dark: #991b1b;
  --color-star: #c9a227;

  /* Neutrals */
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-gray-100: #e9ecef;
  --color-gray-200: #dee2e6;
  --color-gray-300: #ced4da;
  --color-gray-400: #adb5bd;
  --color-gray-500: #6c757d;
  --color-gray-600: #495057;
  --color-gray-700: #343a40;
  --color-gray-800: #212529;

  /* Semantic */
  --color-text: #212529;
  --color-text-light: #6c757d;
  --color-text-inverse: #ffffff;
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-border: #dee2e6;

  /* Typography */
  --font-primary: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --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: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-hero: clamp(2.5rem, 5vw, 4rem);
  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --letter-spacing-tight: -0.02em;
  --letter-spacing-wide: 0.05em;

  /* Spacing */
  --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;
  --space-section: clamp(3rem, 6vw, 5rem);

  /* Layout */
  --container-max: 1280px;
  --container-narrow: 900px;
  --container-padding: 1.5rem;

  /* Borders & Shadows */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.2);

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

/* ========== RESET ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

img {
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

/* ========== TYPOGRAPHY ========== */
h1 { font-size: var(--font-size-hero); }
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); }

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

p:last-child {
  margin-bottom: 0;
}

strong, b {
  font-weight: 700;
}

/* ========== LAYOUT UTILITIES ========== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
}

.section--dark {
  background-color: var(--color-navy);
  color: var(--color-text-inverse);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--red {
  background-color: var(--color-red);
  color: var(--color-text-inverse);
}

/* ========== FLEXBOX / GRID UTILITIES ========== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========== TEXT UTILITIES ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-uppercase { text-transform: uppercase; letter-spacing: var(--letter-spacing-wide); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-light { color: var(--color-text-light); }
.text-white { color: var(--color-text-inverse); }
.text-amber { color: var(--color-amber); }
.text-red { color: var(--color-red); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }

/* ========== SPACING UTILITIES ========== */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* ========== VISIBILITY ========== */
.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;
}

@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* ========== SELECTION ========== */
::selection {
  background-color: var(--color-red);
  color: var(--color-white);
}