:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --panel2: #f2f3f5;
  --border: #e5e6eb;
  --text: #1d2129;
  --muted: #86909c;
  --accent: #4f6fff;
  --accent-soft: rgba(79, 111, 255, .1);
  --ok: #00b42a;
  --warn: #ff7d00;
  --err: #f53f3f;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 4px 16px rgba(0, 0, 0, .04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

a { color: var(--accent); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.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;
}

.lang-switcher { display: inline-flex; min-width: 0; }
.lang-select {
  max-width: 100%;
  min-height: 32px;
  padding: 4px 28px 4px 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  background: var(--panel);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}
.lang-select:hover { border-color: var(--accent); }
.lang-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.msg { font-size: 13px; margin-top: 10px; white-space: pre-wrap; }
.msg.error { color: var(--err); }
.msg.ok { color: var(--ok); }

button.secondary {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

button.secondary:disabled { opacity: .5; cursor: not-allowed; }

input, select, textarea {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  font: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

table { width: 100%; border-collapse: collapse; font-size: 13px; }