/* 登录页样式：复用 index.css 的 :root 变量（亮色主题）。 */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg), #e8edf3);
  padding: 20px;
  box-sizing: border-box;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow, 0 4px 20px rgba(0, 0, 0, 0.08));
  padding: 36px 32px 28px;
  width: 100%;
  max-width: 360px;
  box-sizing: border-box;
}
.login-title {
  margin: 0 0 4px;
  font-size: 22px;
  color: var(--text);
  text-align: center;
  letter-spacing: 0.5px;
}
.login-subtitle {
  margin: 0 0 24px;
  color: var(--text);
  opacity: 0.6;
  font-size: 13px;
  text-align: center;
}
.field {
  display: block;
  margin-bottom: 14px;
}
.field span {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--text);
  opacity: 0.75;
}
.field input {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--text);
  box-sizing: border-box;
  outline: none;
  transition: border-color 0.15s;
}
.field input:focus {
  border-color: var(--blue, #2563eb);
}
.login-error {
  margin: 12px 0;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--red, #dc2626);
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: 6px;
}
.login-btn {
  width: 100%;
  padding: 11px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--blue, #2563eb);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.login-btn:hover { opacity: 0.9; }
.login-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.login-foot {
  margin: 18px 0 0;
  font-size: 12px;
  color: var(--text);
  opacity: 0.45;
  text-align: center;
}