:root {
  color-scheme: light;
  --color-bg: #f4f1ea;
  --color-surface: #fffdf8;
  --color-surface-secondary: #eee9df;
  --color-navy: #182331;
  --color-navy-soft: #263445;
  --color-gold: #c7a86b;
  --color-gold-dark: #a88952;
  --color-text: #20242a;
  --color-text-secondary: #72777f;
  --color-border: #e5ded1;
  --color-danger: #b76555;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: #e9e5dd;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; overscroll-behavior: none; }
body { background: #e9e5dd; }
button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

#game-shell {
  position: relative;
  /* 形成独立层叠上下文，把内部 #login-panel(z-index:5) 关在其中，
     使挂到 document.body 的运营商授权页(高 z-index)能正常盖在最上层 */
  isolation: isolate;
  width: min(100vw, 560px);
  height: 100dvh;
  min-height: 520px;
  margin: 0 auto;
  overflow: hidden;
  background: var(--color-bg);
  box-shadow: 0 10px 48px rgba(24, 35, 49, .12);
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#safe-area-probe {
  position: absolute;
  pointer-events: none;
  visibility: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.login-panel {
  position: absolute;
  inset: max(120px, 18vh) max(18px, 5vw) 16px;
  z-index: 5;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow-y: auto;
  overflow-x: hidden;
  padding-top: 8px;
  padding-bottom: 16px;
}

.login-card {
  flex: 0 0 auto;
  width: 100%;
  max-width: 420px;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  background: rgba(255, 253, 248, .98);
  box-shadow: 0 12px 40px rgba(24, 35, 49, .12);
}

.login-card h1 { margin: 0 0 8px; color: var(--color-text); font-size: 28px; }
.login-card > p { margin: 0 0 18px; color: var(--color-text-secondary); font-size: 14px; line-height: 1.6; }
.form-stack { display: grid; gap: 12px; }
.form-stack label { display: grid; gap: 6px; color: var(--color-text-secondary); font-size: 13px; }
.form-stack input {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  outline: none;
  color: var(--color-text);
  background: var(--color-surface);
}
.form-stack input:focus { border-color: var(--color-gold); box-shadow: 0 0 0 3px rgba(199, 168, 107, .16); }
.form-stack button { min-height: 46px; padding: 10px 14px; border-radius: 14px; cursor: pointer; }
.form-stack button:disabled { cursor: wait; opacity: .62; }
.primary { border: 1px solid var(--color-navy); color: #fff; background: var(--color-navy); font-weight: 700; }
.primary:hover { background: var(--color-navy-soft); }
.secondary { border: 1px solid #d9d3c8; color: var(--color-text); background: var(--color-surface); }
.text-button { border: 0; color: var(--color-gold-dark); background: transparent; }
.code-row { display: grid; grid-template-columns: 1fr 138px; gap: 10px; align-items: end; }
.login-status { min-height: 22px; margin: 12px 0 0 !important; color: var(--color-gold-dark) !important; text-align: center; }
.login-status.error { color: var(--color-danger) !important; }
.agreement { margin: 8px 0 0 !important; color: #9a9da2 !important; font-size: 11px !important; text-align: center; }

/* Tab 切换 */
.login-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0 0 18px;
  padding: 4px;
  border-radius: 12px;
  background: var(--color-surface-secondary);
  border: 1px solid var(--color-border);
}
.tab-btn {
  min-height: 40px;
  padding: 8px 12px;
  border: 0;
  border-radius: 9px;
  cursor: pointer;
  color: var(--color-text-secondary);
  background: transparent;
  font-weight: 600;
  font-size: 14px;
  transition: all .18s ease;
}
.tab-btn.active {
  color: #fff;
  background: var(--color-navy);
  box-shadow: 0 3px 10px rgba(24, 35, 49, .12);
}

/* 头像上传 */
.avatar-uploader {
  display: grid;
  justify-items: center;
  gap: 8px;
  margin: 6px 0 4px;
  cursor: pointer;
}
.avatar-preview {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px dashed var(--color-border);
  background: var(--color-surface-secondary);
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--color-text-secondary);
  transition: border-color .18s ease;
}
.avatar-preview:hover { border-color: var(--color-gold); }
.avatar-preview-lg { width: 96px; height: 96px; }
.avatar-preview img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; display: block; }
.avatar-placeholder { font-size: 26px; font-weight: 700; color: var(--color-text-secondary); }
.avatar-hint { margin: 0; color: var(--color-text-secondary); font-size: 12px; }

/* 用户设置面板使用与登录面板一致的可滚动布局 */
#user-panel.login-panel {
  inset: max(120px, 18vh) max(18px, 5vw) 16px;
}

@media (max-height: 720px) {
  .login-panel { inset: 120px max(18px, 5vw) 16px; }
  .login-card { padding: 16px; }
  .form-stack { gap: 8px; }
  .form-stack input, .form-stack button { min-height: 40px; }
}

@media (max-width: 380px) {
  .login-panel { inset-inline: 12px; }
  .login-card { padding: 16px; }
  .code-row { grid-template-columns: 1fr 118px; }
}