/**
 * base.css — reset + global element styling + typography.
 */

/* Self-hosted fonts. Drop the actual woff2 files into assets/fonts/ and these
   activate automatically; until then the font-display fallback stacks in
   tokens.css keep the app fully functional offline. */
@font-face {
  font-family: "Inter";
  src: url("../fonts/Inter-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Fraunces";
  src: url("../fonts/Fraunces-Variable.woff2") format("woff2");
  font-weight: 300 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono-Variable.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

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

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
  overflow: hidden; /* app shell manages its own scroll regions */
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  margin: 0 0 var(--space-3);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-3xl); font-weight: 560; }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-md); font-family: var(--font-body); font-weight: 650; }

p { margin: 0 0 var(--space-3); color: var(--color-text); }
small, .text-muted { color: var(--color-text-muted); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { margin: 0; padding: 0; list-style: none; }

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

button { cursor: pointer; }

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

/* Tabular / numeric contexts (calculators, tables) use the mono utility face */
.font-mono, .num, table td.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

::selection {
  background: var(--brand-violet-500);
  color: #fff;
}

/* Visible, consistent focus ring everywhere — accessibility floor */
:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

/* Slim, themeable scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--color-border-strong) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: var(--radius-full); }
*::-webkit-scrollbar-track { background: transparent; }

.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;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -48px;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: var(--z-toast);
  transition: top var(--duration-base) var(--ease-out);
}
.skip-link:focus { top: var(--space-3); }