/* ===========================================================
   Base — reset, typography, scrollbars, focus styles
   =========================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--t-fast) var(--easing);
}
a:hover {
  color: var(--accent-hover);
}

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

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

::selection {
  background: var(--accent-soft);
  color: var(--text-primary);
}

/* Scrollbars */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}
*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
*::-webkit-scrollbar-track {
  background: transparent;
}
*::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
  background-clip: padding-box;
}

/* Utility */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* Focus ring (consistent across all interactive elements) */
:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}