/* =========================================
   MATSA — Make American Tires Safe Again
   Base Stylesheet + Design Tokens
   ========================================= */

:root {
  /* MATSA Brand Palette — bold patriotic safety campaign */
  --color-crimson:        #B01C2E;
  --color-crimson-dark:   #8A1522;
  --color-crimson-deeper: #6B0F1A;
  --color-steel:          #1C2B3A;
  --color-steel-light:    #2D3F52;
  --color-steel-mid:      #3D5166;

  /* Light mode surfaces */
  --color-bg:             #F8F7F5;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F3F2EF;
  --color-surface-offset: #ECEAE6;
  --color-divider:        #D8D5CF;
  --color-border:         #C9C6BF;

  /* Text */
  --color-text:           #1A1816;
  --color-text-muted:     #6B6863;
  --color-text-faint:     #A8A5A0;
  --color-text-inverse:   #F8F7F5;

  /* Brand roles */
  --color-primary:        #B01C2E;
  --color-primary-hover:  #8A1522;
  --color-primary-active: #6B0F1A;
  --color-primary-highlight: #F5DDE0;

  --color-accent:         #1C2B3A;
  --color-accent-hover:   #2D3F52;

  --color-alert:          #D4470A;
  --color-alert-bg:       #FEF0EA;
  --color-success:        #2E6B1A;

  /* Typography */
  --font-display: 'Oswald', 'Arial Narrow', Arial, sans-serif;
  --font-body:    'Inter', 'Helvetica Neue', sans-serif;
  --font-serif:   'Georgia', 'Times New Roman', serif;

  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 24, 22, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 24, 22, 0.10);
  --shadow-lg: 0 12px 40px rgba(26, 24, 22, 0.14);

  /* Transitions */
  --transition-base: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --content-narrow:  680px;
  --content-default: 1000px;
  --content-wide:    1240px;
}

[data-theme="dark"] {
  --color-bg:             #111518;
  --color-surface:        #161C22;
  --color-surface-2:      #1C2430;
  --color-surface-offset: #1F2A38;
  --color-divider:        #2A3544;
  --color-border:         #354560;
  --color-text:           #E4E2DE;
  --color-text-muted:     #8A9AAA;
  --color-text-faint:     #4E6070;
  --color-primary:        #E8364B;
  --color-primary-hover:  #F04460;
  --color-primary-highlight: #3A1820;
  --color-alert-bg:       #2A1A10;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #111518;
    --color-surface:        #161C22;
    --color-surface-2:      #1C2430;
    --color-surface-offset: #1F2A38;
    --color-divider:        #2A3544;
    --color-border:         #354560;
    --color-text:           #E4E2DE;
    --color-text-muted:     #8A9AAA;
    --color-text-faint:     #4E6070;
    --color-primary:        #E8364B;
    --color-primary-hover:  #F04460;
    --color-primary-highlight: #3A1820;
    --color-alert-bg:       #2A1A10;
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.65;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display); }
p, li, figcaption { text-wrap: pretty; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }
a { color: var(--color-primary); }

::selection {
  background: var(--color-primary-highlight);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* ---- Layout Utilities ---- */
.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-12));
}
.container--wide  { max-width: var(--content-wide); }
.container--narrow { max-width: var(--content-narrow); }

/* ---- Transitions ---- */
a, button, [role="button"], input, select, textarea {
  transition: color var(--transition-base),
              background var(--transition-base),
              border-color var(--transition-base),
              box-shadow var(--transition-base),
              opacity var(--transition-base);
}