/* ============================================================
   QLUV V2 — Reset + phần tử cơ bản. Dựa trên tokens.css.
   ============================================================ */
*, *::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 { line-height: 1.2; font-weight: 700; color: var(--text); }
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }

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

img, svg { display: block; max-width: 100%; }

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

button { cursor: pointer; background: none; border: none; }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* Thanh cuộn mảnh (webkit) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: var(--line-2);
  border-radius: var(--r-full);
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--muted); background-clip: content-box; }
::-webkit-scrollbar-track { background: transparent; }

/* Tiện ích chung */
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.text-muted { color: var(--muted); }
.text-2 { color: var(--text-2); }
.mono { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
.nowrap { white-space: nowrap; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--sp-1); }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.grow { flex: 1 1 auto; }

/* Trạng thái tải */
.spinner {
  width: 20px; height: 20px; border-radius: 50%;
  border: 2.5px solid var(--line-2);
  border-top-color: var(--primary);
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}