/* ============================
   登录页面基础设置
============================ */
body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', 'Segoe UI', sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at 50% 50%, #1a1c22 0%, #0a0c10 70%, #050509 100%);
  color: #fff;
  overflow: hidden;
}

/* 背景光效 */
body::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(255, 80, 80, 0.25) 0%, transparent 70%),
    radial-gradient(circle at 80% 20%, rgba(50, 150, 255, 0.25) 0%, transparent 70%);
  filter: blur(100px);
  z-index: -1;
}

/* 登录容器 */
.login-container {
  width: 430px;
  min-height: 350px;
  padding: 32px 28px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: 14px;
  backdrop-filter: blur(12px);
  box-shadow: 0 0 32px rgba(0, 0, 0, 0.45);
  text-align: center;
}

/* ============================
   RDG LOGO 呼吸光晕（加在末尾）
============================ */
.login-logo {
  width: 160px;
  margin-bottom: 20px;

  /* 外发光 + 环绕光晕 */
  filter: drop-shadow(0 0 12px rgba(0, 140, 255, 0.55))
          drop-shadow(0 0 28px rgba(0, 140, 255, 0.35));

  animation: logoBreath 4.2s ease-in-out infinite;
}

/* LOGO 呼吸动画 */
@keyframes logoBreath {
  0% {
    filter: drop-shadow(0 0 6px rgba(0, 140, 255, 0.35))
            drop-shadow(0 0 16px rgba(0, 140, 255, 0.18));
    transform: scale(1);
  }
  50% {
    filter: drop-shadow(0 0 20px rgba(0, 160, 255, 0.75))
            drop-shadow(0 0 40px rgba(0, 160, 255, 0.55));
    transform: scale(1.035);
  }
  100% {
    filter: drop-shadow(0 0 6px rgba(0, 140, 255, 0.35))
            drop-shadow(0 0 16px rgba(0, 140, 255, 0.18));
    transform: scale(1);
  }
}


/* 标题 */
.login-title {
  font-size: 22px;
  margin-bottom: 16px;
}

/* Google 登录按钮 */
.google-btn {
  width: 100%;
  padding: 12px;
  background: #ffffff;
  color: #333;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 15px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  transition: 0.25s;
}

.google-btn:hover {
  background: #efefef;
}

/* Google 图标 */
.google-icon {
  width: 25px;
  height: 25px;
}

/* 页脚 */
.footer {
  margin-top: 20px;
  font-size: 13px;
  opacity: 0.6;
}