/* =====================================================================
   Greenwood High School — Base
   Reset, typography defaults, focus states, accessibility primitives.
   ===================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  tab-size: 4;
}

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;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.no-scroll { overflow: hidden; }

img, picture, svg, video {
  max-width: 100%;
  display: block;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--motion-base) var(--ease-out);
}
a:hover { color: var(--color-primary-hover); }
a:focus-visible { outline: none; }

button { font-family: inherit; cursor: pointer; }
button:disabled { cursor: not-allowed; }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
  margin: 0;
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }
@media (max-width: 768px) {
  h1 { font-size: var(--fs-xl); }
  h2 { font-size: var(--fs-lg); }
}

p { margin: 0 0 var(--space-4); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 var(--space-4); padding-left: var(--space-6); }
ul:last-child, ol:last-child { margin-bottom: 0; }

hr {
  border: 0;
  height: 1px;
  background: var(--color-divider);
  margin: var(--space-8) 0;
}

strong { font-weight: var(--fw-semibold); }
em { font-style: italic; }

small { font-size: var(--fs-xs); }

code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-surface-muted);
  padding: 0.12em 0.36em;
  border-radius: var(--radius-xs);
}

/* ---- Focus ring (visible, never removed) ------------------------- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}
button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---- Screen reader only ------------------------------------------ */
.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;
  top: -100px;
  left: var(--space-4);
  z-index: var(--z-top);
  background: var(--color-primary);
  color: var(--color-primary-on);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  transition: top var(--motion-base) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); color: var(--color-primary-on); }

/* ---- Layout primitives ------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}
.container-wide { max-width: var(--container-wide); }
.container-read { max-width: var(--container-read); }

@media (max-width: 640px) {
  .container { padding-left: var(--space-4); padding-right: var(--space-4); }
}

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

/* ---- Scrollbar (subtle, optional) ------------------------------- */
@media (pointer: fine) {
  ::-webkit-scrollbar { width: 12px; height: 12px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: var(--radius-pill);
    border: 3px solid var(--color-bg);
  }
  ::-webkit-scrollbar-thumb:hover { background: var(--color-text-subtle); }
}