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

html, body { height: 100%; }

body {
  margin: 0;
  font: 400 14px/20px var(--font-sans);
  color: var(--ink);
  background: var(--surface-subtle);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-synthesis: none;
  overflow: hidden;
}

[hidden] { display: none !important; }

h1 { font: 500 32px/40px var(--font-sans); letter-spacing: -0.025em; margin: 0; }
h2 { font: 500 20px/28px var(--font-sans); letter-spacing: -0.015em; margin: 0; }
h3 { font: 500 16px/24px var(--font-sans); letter-spacing: -0.01em; margin: 0; }
h4 { font: 500 14px/20px var(--font-sans); margin: 0; }
p { margin: 0; }
small { font: 400 12px/16px var(--font-sans); color: var(--ink-muted); }
strong { font-weight: 500; }
code, kbd, samp { font-family: var(--font-mono); font-size: 0.92em; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea { font: inherit; color: inherit; }

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: var(--h-sm);
  padding: 0 10px;
  font: 500 14px/20px var(--font-sans);
  border: 1px solid var(--border-control);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, border-color .15s, color .15s;
}
button:hover:not(:disabled) { background: var(--surface-hover); }
button:active:not(:disabled) { background: var(--surface-active); }
button:disabled { background: var(--surface-hover); color: var(--ink-disabled); border-color: var(--border); cursor: not-allowed; }

button.primary {
  height: var(--h-md);
  padding: 0 var(--space-4);
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}
button.primary:hover:not(:disabled) { background: var(--primary-hover); border-color: var(--primary-hover); }
button.primary:active:not(:disabled) { background: var(--primary-hover); }

button.ghost { border-color: transparent; background: transparent; }
button.ghost:hover:not(:disabled) { background: var(--surface-hover); }

button.small { height: 28px; padding: 0 10px; font-size: 12px; line-height: 16px; }

button.link {
  height: auto;
  padding: 2px 4px;
  border: 0;
  background: none;
  color: var(--link);
  font: 400 13px/16px var(--font-sans);
  border-radius: var(--radius-sm);
}
button.link:hover:not(:disabled) { background: var(--blue-100); text-decoration: underline; }
button.link.danger { color: var(--red-900); }
button.link.danger:hover:not(:disabled) { background: var(--red-100); }

input[type="text"], input[type="email"], input[type="password"], input[type="number"], input:not([type]), select, textarea {
  height: var(--h-sm);
  padding: 0 10px;
  font: 400 14px/20px var(--font-sans);
  border: 1px solid var(--border-control);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  min-width: 0;
  transition: border-color .15s;
}
textarea { height: auto; padding: 8px 10px; line-height: 22px; resize: vertical; }
select { padding-right: 6px; }
input::placeholder, textarea::placeholder { color: var(--ink-disabled); }
input:hover:not(:disabled), select:hover, textarea:hover { border-color: var(--ink-muted); }
input:disabled { background: var(--surface-hover); color: var(--ink-disabled); border-color: var(--border); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--focus-ring); outline-offset: 2px; border-color: var(--border-control); }

::selection { background: var(--selection); }

:root {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-500) transparent;
}
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background-color: var(--gray-500);
  border: 3px solid transparent;
  background-clip: content-box;
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background-color: var(--gray-600); background-clip: content-box; }
::-webkit-scrollbar-corner { background: transparent; }

.hint { font: 400 12px/18px var(--font-sans); color: var(--ink-muted); }
.meta { font: 400 12px/16px var(--font-sans); color: var(--ink-muted); }
.mono { font-family: var(--font-mono); font-size: 13px; }

.status { font: 400 12px/18px var(--font-sans); color: var(--ink-muted); min-height: 18px; }
.status.error { color: var(--red-900); }
.status.loading { display: flex; align-items: center; gap: var(--space-2); }
.status.loading::before {
  content: "";
  width: 12px; height: 12px;
  flex-shrink: 0;
  border: 1.5px solid var(--gray-400);
  border-top-color: var(--ink-muted);
  border-radius: var(--radius-full);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.tnum { font-variant-numeric: tabular-nums; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}