/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-md);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "cv11", "ss01", "ss03";
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

h1,h2,h3,h4,h5,h6,p,figure,blockquote { margin: 0; }

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

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

img, svg, video { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
input, textarea, select, button { font-family: inherit; }

/* ---------- Скроллбар ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--surface-4);
  border-radius: var(--r-full);
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--border-3); }
* { scrollbar-width: thin; scrollbar-color: var(--surface-4) transparent; }

/* ---------- Фокус ---------- */
:focus { outline: none; }
:focus-visible {
  box-shadow: var(--focus-ring);
  border-radius: var(--r-sm);
}

/* ---------- Утилиты ---------- */
[hidden] { display: none !important; }

.u-muted  { color: var(--text-2); }
.u-dim    { color: var(--text-3); }
.u-faint  { color: var(--text-4); }
.u-mono   { font-family: var(--font-mono); }
.u-nowrap { white-space: nowrap; }
.u-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.u-center { display: flex; align-items: center; justify-content: center; }
.u-row    { display: flex; align-items: center; gap: var(--s-2); }
.u-col    { display: flex; flex-direction: column; gap: var(--s-2); }
.u-grow   { flex: 1 1 auto; min-width: 0; }

.u-mt-1 { margin-top: var(--s-1); } .u-mt-2 { margin-top: var(--s-2); }
.u-mt-3 { margin-top: var(--s-3); } .u-mt-4 { margin-top: var(--s-4); }
.u-mt-6 { margin-top: var(--s-6); }
.u-mb-2 { margin-bottom: var(--s-2); } .u-mb-4 { margin-bottom: var(--s-4); }
.u-mb-6 { margin-bottom: var(--s-6); }

.u-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;
}

/* иконки */
.i {
  display: inline-block;
  width: 16px; height: 16px;
  flex-shrink: 0;
  vertical-align: middle;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.i--sm { width: 14px; height: 14px; }
.i--lg { width: 20px; height: 20px; }

/* ---------- Keyframes ---------- */
@keyframes spin    { to { transform: rotate(360deg); } }
@keyframes pulse   { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop-in {
  from { opacity: 0; transform: translateY(4px) scale(.985); }
  to   { opacity: 1; transform: translateY(0)   scale(1);    }
}
@keyframes pop-out {
  from { opacity: 1; transform: translateY(0)   scale(1);    }
  to   { opacity: 0; transform: translateY(4px) scale(.985); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}