/* =========================================================
   BASE — reset, typography, global elements
   ========================================================= */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
}
:root[data-theme="light"] { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

h1, h2, h3, h4 {
  color: var(--heading);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  font-weight: 700;
}
h2 { font-size: var(--fs-h2); letter-spacing: -0.03em; }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 1em; }

a {
  color: var(--accent-bright);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
a:hover { color: var(--heading); }

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

ul { margin: 0; padding: 0; }

button { font: inherit; color: inherit; }

code, kbd, .mono { font-family: var(--font-mono); }

::selection { background: rgba(var(--accent-rgb), 0.3); color: var(--heading); }

:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { top: 12px; color: var(--on-accent); }

.accent { color: var(--accent-bright); }

.icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}