/* ============================================================
   基础样式 / Reset
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#app {
  height: 100vh;
  display: flex;
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 650;
  color: var(--text);
}

p { margin: 0; }

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

button {
  font-family: inherit;
  cursor: pointer;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 9px 11px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  width: 100%;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-weak);
}

textarea { resize: vertical; min-height: 72px; }

label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 6px;
}

::placeholder { color: var(--text-3); }

/* 滚动条 */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 8px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: #94a3b8; background-clip: padding-box; }

/* 通用工具类 */
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.gap-4 { gap: 4px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.spread { justify-content: space-between; }
.center { align-items: center; justify-content: center; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; }
.muted { color: var(--text-3); }
.hide { display: none !important; }