/* ===========================================================
   BASE — resets, global elements
=========================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

@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 {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--fs-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden; /* nothing should ever scroll sideways */
}

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

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

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

button { cursor: pointer; border: none; background: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-heading);
  line-height: 1.15;
  font-weight: 600;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
}

h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }

p { color: var(--color-text); }

:focus-visible {
  outline: 2.5px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

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

main { flex: 1; }

/* Wide content (tables, code) scrolls inside itself, not the page */
table { width: 100%; border-collapse: collapse; }
.table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Scrollbar accent (progressive enhancement) */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--brand-light-beige); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--brand-sage); }
html { scrollbar-color: var(--brand-light-beige) var(--color-bg); }