* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: var(--fs-sm, 16px);
  color: var(--text, rgba(0, 0, 0, 0.9));
  background: var(--bg, #ffffff);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link, #1783ff);
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

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

button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid transparent;
  background: #f2f2f2;
  color: var(--text, rgba(0, 0, 0, 0.9));
  padding: 7px 16px;
  text-decoration: none;
  transition: background-color 0.15s, opacity 0.15s;
}

button:hover {
  background: #ebebeb;
  text-decoration: none;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ripple-relative { position: relative; }
.ripple-viewport {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  overflow: hidden;
  pointer-events: none;
}
.ripple-ink {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.12;
  pointer-events: none;
  transform: scale(0);
  animation: ripple-ink 0.55s ease-out forwards;
}
@keyframes ripple-ink {
  to { transform: scale(1); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ripple-ink { display: none; }
}

/* 统一极简滚动条 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb, #c8c8c8);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover, #a8a8a8);
}