/* ==========================================================================
   Kickback — design tokens
   Colors, typography, spacing, radii, shadows, motifs.
   Source of truth — every other stylesheet consumes var(--…) only.
   ========================================================================== */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/Inter-VariableFont.ttf') format('truetype-variations');
}
@font-face {
  font-family: 'Inter';
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/Inter-Italic-VariableFont.ttf') format('truetype-variations');
}
@font-face {
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/SpaceGrotesk-VariableFont.ttf') format('truetype-variations');
}
@font-face {
  font-family: 'Space Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/SpaceMono-Regular.ttf') format('truetype');
}
@font-face {
  font-family: 'Space Mono';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/SpaceMono-Italic.ttf') format('truetype');
}
@font-face {
  font-family: 'Space Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/SpaceMono-Bold.ttf') format('truetype');
}
@font-face {
  font-family: 'Space Mono';
  font-style: italic;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/SpaceMono-BoldItalic.ttf') format('truetype');
}

:root {
  /* Brand reds (scale around #DE4444) */
  --red-50:  #FDF1F1;
  --red-100: #FBDDDD;
  --red-200: #F6BABA;
  --red-300: #EF9090;
  --red-400: #E76B6B;
  --red-500: #DE4444;
  --red-600: #C62F2F;
  --red-700: #A32121;
  --red-800: #7C1A1A;
  --red-900: #561313;

  /* Warm stone neutrals (hue ~22°, low chroma) */
  --stone-0:   #FFFFFF;
  --stone-25:  #FEFDFC;
  --stone-50:  #FBFAF8;
  --stone-100: #F5F3F0;
  --stone-200: #EAE6E1;
  --stone-300: #D6D0C9;
  --stone-400: #ABA39A;
  --stone-500: #7C746B;
  --stone-600: #5C554E;
  --stone-700: #423C36;
  --stone-800: #2A2522;
  --stone-900: #1A1614;
  --stone-950: #0F0C0B;

  /* Supporting semantic hues — warmed and desaturated */
  --green-50:  #F2F5EC;
  --green-500: #6B8E3D;
  --green-700: #4E6A2A;

  --amber-50:  #FBEEE3;
  --amber-500: #C97A3C;
  --amber-700: #954F1E;

  --blue-50:  #E8F0EE;
  --blue-500: #3E7A78;
  --blue-700: #2A5A58;

  /* Foreground */
  --fg-1: var(--stone-900);
  --fg-2: var(--stone-700);
  --fg-3: var(--stone-500);
  --fg-4: var(--stone-400);
  --fg-on-brand: var(--stone-0);
  --fg-brand: var(--red-600);
  --fg-success: var(--green-700);
  --fg-warning: var(--amber-700);
  --fg-danger:  var(--red-700);
  --fg-info:    var(--blue-700);

  /* Background */
  --bg-page:    var(--stone-50);
  --bg-surface: var(--stone-0);
  --bg-sunken:  var(--stone-100);
  --bg-raised:  var(--stone-0);
  --bg-hover:   var(--stone-100);
  --bg-active:  var(--stone-200);
  --bg-muted:   var(--stone-50);
  --bg-brand:         var(--red-500);
  --bg-brand-hover:   var(--red-600);
  --bg-brand-subtle:  var(--red-50);
  --bg-success-subtle: var(--green-50);
  --bg-warning-subtle: var(--amber-50);
  --bg-danger-subtle:  var(--red-50);
  --bg-info-subtle:    var(--blue-50);
  --bg-inverse: var(--stone-900);

  /* Borders */
  --border-subtle: var(--stone-200);
  --border-default: var(--stone-300);
  --border-strong: var(--stone-400);
  --border-brand: var(--red-500);
  --border-focus: var(--red-500);

  /* Radii */
  --radius-xs: 2px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-pill: 999px;

  /* Shadows — crisp 1px drops, never blurry */
  --shadow-xs: 0 1px 0 0 rgba(15, 23, 42, 0.04), 0 0 0 1px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 2px 4px -1px rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 8px 16px -4px rgba(15, 23, 42, 0.10), 0 2px 4px -2px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 40px -12px rgba(15, 23, 42, 0.18), 0 0 0 1px rgba(15, 23, 42, 0.06);

  --shadow-inset-input: inset 0 1px 2px 0 rgba(15, 23, 42, 0.06);
  --shadow-inset-well:  inset 0 1px 3px 0 rgba(15, 23, 42, 0.08);

  --ring-focus: 0 0 0 3px rgba(222, 68, 68, 0.25);

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

  /* Typography */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'Space Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --font-display: 'Space Grotesk', 'Inter', ui-sans-serif, system-ui, sans-serif;

  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-md:   17px;
  --text-lg:   20px;
  --text-xl:   24px;
  --text-2xl:  32px;
  --text-3xl:  40px;
  --text-4xl:  56px;
  --text-5xl:  72px;
  --text-6xl:  96px;

  --leading-tight: 1.15;
  --leading-snug:  1.3;
  --leading-body:  1.5;
  --leading-loose: 1.7;

  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.02em;
  --tracking-caps:   0.08em;

  /* Textures */
  --grain-opacity: 0.025;
  --dotgrid-color: rgba(15, 23, 42, 0.08);
  --dotgrid-size: 20px;

  /* Motion */
  --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in:  cubic-bezier(0.4, 0, 1, 1);
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--fg-1);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'ss01', 'cv11', 'cv02';
}

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

/* Type primitives */
.ks-display {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 600;
  color: var(--fg-1);
  margin: 0;
}
.ks-h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 600;
  color: var(--fg-1);
  margin: 0;
}
.ks-h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  font-weight: 600;
  color: var(--fg-1);
  margin: 0;
}
.ks-h3 {
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--fg-1);
  margin: 0;
}
.ks-h4 {
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  font-weight: 600;
  color: var(--fg-1);
  margin: 0;
}
.ks-lede {
  font-size: var(--text-md);
  line-height: var(--leading-body);
  color: var(--fg-2);
  font-weight: 400;
  margin: 0;
}
.ks-body { font-size: var(--text-base); line-height: var(--leading-body); color: var(--fg-1); margin: 0; }
.ks-small { font-size: var(--text-sm); line-height: var(--leading-snug); color: var(--fg-2); margin: 0; }
.ks-caption { font-size: var(--text-xs); line-height: var(--leading-snug); color: var(--fg-3); margin: 0; }

.ks-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--fg-brand);
}
.ks-label { font-size: var(--text-sm); font-weight: 500; color: var(--fg-2); line-height: var(--leading-snug); }
.ks-mono, code, kbd {
  font-family: var(--font-mono);
  font-size: 0.92em;
  font-feature-settings: 'zero', 'ss01';
}
.ks-numeric {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum', 'zero';
}

/* Background motifs */
.ks-grain { position: relative; }
.ks-grain::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}

.ks-dotgrid {
  background-image: radial-gradient(circle, var(--dotgrid-color) 1px, transparent 1px);
  background-size: var(--dotgrid-size) var(--dotgrid-size);
  background-position: 0 0;
}

@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;
  }
}