/* === BASE.CSS — TradeRail Design System === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

:root {
  /* 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);

  /* 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;

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

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

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 1000px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
}

/* === LIGHT MODE === */
:root, [data-theme="light"] {
  --color-bg: #F4F3F0;
  --color-surface: #FAFAF8;
  --color-surface-2: #FFFFFF;
  --color-surface-offset: #ECEAE6;
  --color-surface-offset-2: #E5E3DE;
  --color-surface-dynamic: #DDDBD6;
  --color-divider: #D8D6D2;
  --color-border: #CFCDC8;

  /* Text */
  --color-text: #1A1916;
  --color-text-muted: #6B6A65;
  --color-text-faint: #B5B4AF;
  --color-text-inverse: #F4F3F0;

  /* Rail Orange — primary brand accent */
  --color-primary: #FF6B00;
  --color-primary-hover: #D95A00;
  --color-primary-active: #B34900;
  --color-primary-highlight: #FFF0E5;

  /* Steel Blue — secondary for CTA/data */
  --color-secondary: #1D4E7C;
  --color-secondary-hover: #163D62;
  --color-secondary-active: #0F2D48;
  --color-secondary-highlight: #D0DFF0;

  /* Utility */
  --color-success: #2E6B1A;
  --color-error: #9B1A2A;
  --color-warning: #955200;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 25, 22, 0.08);
  --shadow-md: 0 4px 16px rgba(26, 25, 22, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 25, 22, 0.12);
  --shadow-xl: 0 32px 80px rgba(26, 25, 22, 0.16);
}

/* === DARK MODE === */
[data-theme="dark"] {
  --color-bg: #141310;
  --color-surface: #1A1916;
  --color-surface-2: #1F1E1B;
  --color-surface-offset: #181714;
  --color-surface-offset-2: #201F1C;
  --color-surface-dynamic: #2C2B27;
  --color-divider: #252420;
  --color-border: #383632;

  --color-text: #E8E6E2;
  --color-text-muted: #8A8880;
  --color-text-faint: #5C5A56;
  --color-text-inverse: #141310;

  --color-primary: #FF7A1A;
  --color-primary-hover: #FF6B00;
  --color-primary-active: #D95A00;
  --color-primary-highlight: #3D1A00;

  --color-secondary: #5B9FD8;
  --color-secondary-hover: #3D88CC;
  --color-secondary-active: #2570B8;
  --color-secondary-highlight: #0F2340;

  --color-success: #4EA832;
  --color-error: #E8405A;
  --color-warning: #E07820;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 32px 80px rgba(0, 0, 0, 0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141310;
    --color-surface: #1A1916;
    --color-surface-2: #1F1E1B;
    --color-surface-offset: #181714;
    --color-surface-offset-2: #201F1C;
    --color-surface-dynamic: #2C2B27;
    --color-divider: #252420;
    --color-border: #383632;
    --color-text: #E8E6E2;
    --color-text-muted: #8A8880;
    --color-text-faint: #5C5A56;
    --color-text-inverse: #141310;
    --color-primary: #FF7A1A;
    --color-primary-hover: #FF6B00;
    --color-primary-active: #D95A00;
    --color-primary-highlight: #3D1A00;
    --color-secondary: #5B9FD8;
    --color-secondary-hover: #3D88CC;
    --color-secondary-active: #2570B8;
    --color-secondary-highlight: #0F2340;
    --color-success: #4EA832;
    --color-error: #E8405A;
    --color-warning: #E07820;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 32px 80px rgba(0, 0, 0, 0.6);
  }
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color 250ms ease, color 250ms ease;
}

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: 1.15; }
p, li { text-wrap: pretty; max-width: 68ch; }

::selection { background: color-mix(in oklab, var(--color-primary) 25%, transparent); }
: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;
  }
}

a, button, [role='button'], input, textarea, select {
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition), opacity var(--transition);
}
button { cursor: pointer; background: none; border: none; }
.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; }