/* ============================================================
   VANILLA UI — Reset & Base
   ============================================================ */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
  background-color: var(--background);
  color: var(--foreground);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--muted-foreground);
}

/* Selection */
::selection {
  background: var(--primary);
  color: var(--primary-foreground);
}

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* Links */
a { color: inherit; text-decoration: none; }

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

/* Images */
img, video { max-width: 100%; height: auto; display: block; }

/* Code */
code, pre, kbd {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* Border color for all elements */
*, *::before, *::after {
  border-color: var(--border);
}

/* Utility: sr-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-width: 0;
}

/* Utility: truncate */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Utility: animate-in */
@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}
@keyframes slide-in-from-top {
  from { transform: translateY(-4px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes slide-in-from-bottom {
  from { transform: translateY(4px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}
@keyframes slide-in-from-left {
  from { transform: translateX(-4px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
@keyframes slide-in-from-right {
  from { transform: translateX(4px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}
@keyframes shimmer {
  from { background-position: -200% 0; }
  to   { background-position:  200% 0; }
}