/* login.css — 登录门样式：深色沉浸背景 + 玻璃质感卡片 */

/* 登录模式下隐藏主界面骨架（侧边栏 / 内容容器），登录成功后由 JS 移除该 class */
body.login-mode .side,
body.login-mode #app,
body.login-mode #view {
  display: none;
}

body.login-mode {
  overflow: hidden;
}

/* 全屏登录层：大面积柔和径向渐变光斑（青绿 + 蓝，低透明度） */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
  overflow-y: auto;
  color: var(--fg);
  background:
    radial-gradient(620px 420px at 16% 10%, rgba(45, 212, 191, 0.13), rgba(45, 212, 191, 0) 62%),
    radial-gradient(760px 540px at 86% 90%, rgba(59, 130, 246, 0.13), rgba(59, 130, 246, 0) 62%),
    radial-gradient(880px 620px at 55% 118%, rgba(45, 212, 191, 0.05), rgba(45, 212, 191, 0) 60%),
    var(--bg);
}

/* 玻璃卡片 */
.login-card {
  width: 100%;
  max-width: 384px;
  margin: auto;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 38px 32px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(13, 19, 30, 0.58);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  animation: login-card-in 0.34s ease both;
}

/* 不支持 backdrop-filter 时回退为不透明底板，避免文字发糊 */
@supports not (backdrop-filter: blur(1px)) {
  .login-card {
    background: var(--bg-1);
  }
}

@keyframes login-card-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 品牌区：透明 PNG 徽章，不额外加底板 */
.login-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.login-brand img {
  display: block;
  width: 52px;
  height: 52px;
  margin-bottom: 8px;
  filter: drop-shadow(0 8px 22px rgba(45, 212, 191, 0.22));
}

.login-title {
  margin: 0;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: 0.3px;
  color: var(--fg);
}

.login-sub {
  margin: 0;
  font-size: 13px;
}

/* 表单 */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-form .inp {
  width: 100%;
}

.login-submit {
  width: 100%;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.login-submit svg {
  width: 16px;
  height: 16px;
  flex: none;
}

/* 错误提示区（默认隐藏） */
.login-error {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--bad);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.32);
}

.login-error[hidden] {
  display: none;
}

.login-error svg {
  width: 15px;
  height: 15px;
  flex: none;
  margin-top: 2px;
}

/* 后端不可达的错误态 */
.login-fatal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.login-fatal > svg {
  width: 36px;
  height: 36px;
  color: var(--warn);
  stroke-width: 1.7;
}

.login-fatal-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}

.login-fatal-detail {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  word-break: break-all;
}

.login-fatal .login-submit {
  margin-top: 8px;
}

/* 移动端：卡片自适应宽度、左右 20px 边距，输入框与按钮不小于 44px */
@media (max-width: 640px) {
  .login-overlay {
    padding: 20px;
  }

  .login-card {
    padding: 30px 22px 24px;
    gap: 18px;
  }

  .login-form .inp,
  .login-submit {
    min-height: 44px;
  }

  .login-form .inp {
    font-size: 16px; /* 防止 iOS 聚焦时自动放大页面 */
  }
}

@media (prefers-reduced-motion: reduce) {
  .login-card {
    animation: none;
  }
}