/* Reset + base element styling. */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html, body { height: 100%; }

body {
  font-family: var(--font);
  font-size: var(--fs-md);
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { font-weight: 650; line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }

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

button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: inherit; }

code, pre, .mono { font-family: var(--mono); font-size: 0.92em; }

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

/* Scrollbar (webkit) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }
::-webkit-scrollbar-track { background: transparent; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

svg.icon { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; vertical-align: middle; }

.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.nowrap { white-space: nowrap; }
.mono-num { font-variant-numeric: tabular-nums; font-family: var(--mono); }

/* Generic buttons */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: 8px 14px; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  font-size: var(--fs-sm); font-weight: 550; transition: var(--transition);
}
.btn:hover { border-color: var(--text-faint); background: var(--surface); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-600); border-color: var(--accent-600); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-sm { padding: 5px 10px; font-size: var(--fs-xs); }
.btn-icon { padding: 8px; }

/* Inputs */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: var(--fs-sm); color: var(--text-muted); font-weight: 550; }
.input, select.input, textarea.input {
  width: 100%; padding: 9px 12px; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--bg-elev); color: var(--text);
  transition: var(--transition);
}
.input:focus { border-color: var(--accent); outline: none; }
.input::placeholder { color: var(--text-faint); }

hr { border: none; border-top: 1px solid var(--border-soft); }

.spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.7s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}