/* base: reset, typography, utilities, focus, scrollbars */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font-ui); font-size: var(--fs-base); line-height: var(--lh-body);
  font-weight: var(--fw-regular); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  font-variant-numeric: tabular-nums lining-nums;
}
h1, h2, h3, h4, h5, p { margin: 0; }
h1, h2, h3, h4 { font-weight: var(--fw-bold); line-height: var(--lh-tight); letter-spacing: 0; }
a { color: var(--primary-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; border-top: 1px solid var(--divider); margin: var(--sp-4) 0; }
code, .mono { font-family: var(--font-mono); font-size: .9em; direction: ltr; unicode-bidi: isolate; }
bdi, .ltr { unicode-bidi: isolate; }
.ltr { direction: ltr; display: inline-block; }
[hidden] { display: none !important; }

:focus { outline: none; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: var(--r-xs); }

::selection { background: var(--primary-soft-2); color: var(--text); }
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; border: 3px solid transparent; background-clip: content-box; }

.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; inset-block-start: 8px; inset-inline-start: 8px; z-index: 1000; background: var(--primary); color: var(--on-primary); padding: 10px 16px; border-radius: var(--r-sm); transform: translateY(-200%); }
.skip-link:focus { transform: none; }

/* layout helpers */
.row { display: flex; align-items: center; gap: var(--sp-3); }
.row-wrap { flex-wrap: wrap; }
.row-start { align-items: flex-start; }
.col { display: flex; flex-direction: column; gap: var(--sp-3); }
.stack-1 > * + * { margin-block-start: var(--sp-1); }
.stack-2 > * + * { margin-block-start: var(--sp-2); }
.stack-3 > * + * { margin-block-start: var(--sp-3); }
.stack-4 > * + * { margin-block-start: var(--sp-4); }
.stack-6 > * + * { margin-block-start: var(--sp-6); }
.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); } .gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); } .gap-6 { gap: var(--sp-6); }
.spacer { flex: 1; }
.grow { flex: 1; min-width: 0; }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.grid, .grid-2, .grid-3, .grid-4, .grid-auto { display: grid; gap: var(--sp-4); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); }
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); } .grid-4.keep-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.muted { color: var(--text-2); }
.subtle { color: var(--text-3); }
.small { font-size: var(--fs-sm); }
.xs { font-size: var(--fs-xs); }
.bold { font-weight: var(--fw-bold); }
.medium { font-weight: var(--fw-medium); }
.num { font-variant-numeric: tabular-nums lining-nums; }
.center { text-align: center; }

/* icons that point somewhere turn around in RTL */
[dir="rtl"] .flip { transform: scaleX(-1); }

/* motion */
@keyframes fade-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop-in { from { opacity: 0; transform: translateY(6px) scale(.98); } to { opacity: 1; transform: none; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse-ring { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--primary) 45%, transparent); } 70%, 100% { box-shadow: 0 0 0 9px transparent; } }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.anim-fade-up { animation: fade-up var(--d-slow) var(--ease-out) both; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 1ms !important; scroll-behavior: auto !important; }
}