/* =========================================================================
   BASE — reset, typography, accessibility primitives
   ========================================================================= */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.5;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  color: var(--color-ink);
}
h1 { font-size: var(--fs-xl); letter-spacing: -0.005em; }
h2 { font-size: var(--fs-lg); }
h3 { font-size: var(--fs-md); }
h4 { font-size: var(--fs-base); font-weight: 700; }

p { margin: 0 0 var(--space-3); }

a { color: var(--color-accent); }

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

button { cursor: pointer; }

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

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

/* ---- Accessibility: visible focus ring everywhere --------------------*/
:focus-visible {
  outline: 3px solid var(--color-accent-2);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Screen-reader only utility */
.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 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: 999;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

::selection { background: var(--color-accent-2); color: var(--color-ink); }

/* Scrollbars — subtle, ledger-like */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: var(--radius-pill); }
::-webkit-scrollbar-thumb:hover { background: var(--color-muted); }