* , *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
svg { display: block; flex-shrink: 0; }

.h1 { font-size: 28px; letter-spacing: -0.03em; }
.h2 { font-size: 20px; }
.h3 { font-size: 16px; }
.text-muted { color: var(--muted); }
.text-faint { color: var(--faint); }
.text-sm { font-size: 12.5px; }
.text-xs { font-size: 11px; }
.mono { font-family: var(--mono); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 32px; }

/* generic utility layout */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 4px; } .gap-6 { gap: 6px; } .gap-8 { gap: 8px; }
.gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }
.flex-1 { flex: 1; min-width: 0; }
.hidden { display: none !important; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }

::placeholder { color: var(--faint); }

.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, #eef1f4 37%, var(--border) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--r-sm);
}
@keyframes shimmer { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

.fade-in { animation: fadeIn .18s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: none; } }