/* 皮皮乐园：顶栏（注入到每个学习 tab）、登录页、管理页共用。类名一律 pipi- 开头，不和 tab 自己的样式打架。 */
:root {
  --pipi-ink: #33304a;
  --pipi-muted: #7b7891;
  --pipi-line: #ece4f5;
  --pipi-red: #ff6b6b;
  --pipi-lift: 0 5px 0 rgba(51, 48, 74, .12);
}

/* 登录页、管理页不加载 tab 自己的样式表，box-sizing 在这里补上（只管 pipi 自己的元素） */
.pipi-page, .pipi-page *, .pipi-bar, .pipi-bar *, .pipi-mask, .pipi-mask *, .pipi-toast { box-sizing: border-box; }

/* ---------------------------------------------------------------- 顶栏 */
.pipi-bar {
  position: relative; z-index: 30; display: flex; align-items: center; gap: 10px;
  padding: 10px max(14px, env(safe-area-inset-right)) 10px max(14px, env(safe-area-inset-left));
  padding-top: max(10px, env(safe-area-inset-top));
  background: linear-gradient(90deg, #ff8787, #ffa94d 35%, #ffd43b 60%, #69db7c 80%, #4dabf7);
  box-shadow: 0 4px 0 rgba(0, 0, 0, .08);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-user-select: none; user-select: none;
}
.pipi-bar a { text-decoration: none; color: inherit; }
.pipi-logo { display: flex; align-items: center; gap: 6px; flex: none; color: #fff !important; font-weight: 900; font-size: 20px;
  text-shadow: 0 2px 0 rgba(0, 0, 0, .15); letter-spacing: 1px; }
.pipi-logo-icon { width: 44px; height: 44px; border-radius: 14px; background: #fff; display: grid; place-items: center; font-size: 26px;
  box-shadow: var(--pipi-lift); text-shadow: none; }
.pipi-tabs { flex: 1; display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; padding: 2px 2px 6px; margin-bottom: -6px; }
.pipi-tabs::-webkit-scrollbar { display: none; }
.pipi-tab {
  flex: none; display: flex; align-items: center; gap: 6px; min-height: 48px; padding: 6px 18px; border-radius: 16px;
  background: rgba(255, 255, 255, .55); color: var(--pipi-ink) !important; font-size: 18px; font-weight: 800; box-shadow: var(--pipi-lift);
}
.pipi-tab .pipi-tab-icon { font-size: 22px; }
.pipi-tab.on { background: #fff; color: var(--t, var(--pipi-red)) !important; box-shadow: 0 5px 0 rgba(0, 0, 0, .14); }
.pipi-tab:active { transform: translateY(3px); box-shadow: 0 2px 0 rgba(0, 0, 0, .12); }
.pipi-me {
  flex: none; display: flex; align-items: center; gap: 6px; min-height: 48px; padding: 4px 12px 4px 4px; border: 0; border-radius: 999px;
  background: #fff; box-shadow: var(--pipi-lift); font: inherit; font-size: 16px; font-weight: 700; color: var(--pipi-ink); cursor: pointer;
}
.pipi-avatar { width: 40px; height: 40px; border-radius: 50%; background: #fff3bf; display: grid; place-items: center; font-size: 24px; }
.pipi-menu {
  position: absolute; right: max(14px, env(safe-area-inset-right)); top: calc(100% + 6px); min-width: 180px; padding: 8px;
  background: #fff; border-radius: 20px; box-shadow: 0 12px 30px rgba(51, 48, 74, .18);
}
.pipi-menu button, .pipi-menu a {
  display: flex; align-items: center; gap: 10px; width: 100%; min-height: 48px; padding: 8px 12px; border: 0; border-radius: 14px;
  background: none; font: inherit; font-size: 17px; color: var(--pipi-ink); cursor: pointer; text-align: left;
}
.pipi-menu button:hover, .pipi-menu a:hover { background: #f6f2fb; }
.pipi-menu .pipi-who { padding: 6px 12px 10px; color: var(--pipi-muted); font-size: 14px; border-bottom: 2px dashed var(--pipi-line); margin-bottom: 4px; }

@media (max-width: 600px) {
  .pipi-bar { gap: 8px; padding-left: 10px; padding-right: 10px; }
  .pipi-logo-text, .pipi-name { display: none; }
  .pipi-me { padding: 4px; }
  .pipi-tab { padding: 6px 14px; font-size: 17px; }
}

/* ---------------------------------------------------------------- 弹窗、提示 */
.pipi-mask { position: fixed; inset: 0; z-index: 100; background: rgba(51, 48, 74, .45); display: grid; place-items: center; padding: 16px; }
.pipi-dialog {
  width: min(420px, 100%); background: #fff; border-radius: 28px; padding: 22px; box-shadow: 0 20px 50px rgba(0, 0, 0, .25);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif; color: var(--pipi-ink);
}
.pipi-dialog h2 { margin: 0 0 6px; font-size: 22px; }
.pipi-dialog p { margin: 0 0 14px; color: var(--pipi-muted); }
.pipi-toast {
  position: fixed; left: 50%; top: 84px; transform: translateX(-50%); z-index: 90; background: #fff; color: var(--pipi-ink);
  border-radius: 999px; padding: 12px 22px; font-size: 18px; font-weight: 700; box-shadow: 0 10px 30px rgba(51, 48, 74, .2);
  font-family: "PingFang SC", system-ui, sans-serif; animation: pipi-drop .4s ease; white-space: nowrap;
}
@keyframes pipi-drop { from { transform: translate(-50%, -20px); opacity: 0; } }

/* ---------------------------------------------------------------- 表单 */
.pipi-field { display: block; margin-bottom: 14px; }
.pipi-field > span { display: block; font-weight: 700; margin-bottom: 6px; font-size: 16px; }
.pipi-input {
  width: 100%; min-width: 0; min-height: 54px; padding: 10px 16px; border: 3px solid var(--pipi-line); border-radius: 18px; background: #fbf9fe;
  font: inherit; font-size: 19px; color: var(--pipi-ink); outline: none; -webkit-appearance: none; appearance: none;
}
.pipi-input:focus { border-color: #74c0fc; background: #fff; }
.pipi-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 56px; padding: 10px 24px; border: 0;
  border-radius: 20px; background: var(--pipi-red); color: #fff; font: inherit; font-size: 19px; font-weight: 800; cursor: pointer;
  box-shadow: 0 5px 0 rgba(0, 0, 0, .18); -webkit-user-select: none; user-select: none; touch-action: manipulation;
}
.pipi-btn:active { transform: translateY(3px); box-shadow: 0 2px 0 rgba(0, 0, 0, .15); }
.pipi-btn:disabled { opacity: .6; }
.pipi-btn.ghost { background: #f3effa; color: var(--pipi-ink); }
.pipi-btn.block { width: 100%; }
.pipi-btn.small { min-height: 40px; padding: 6px 14px; font-size: 15px; border-radius: 14px; box-shadow: 0 3px 0 rgba(0, 0, 0, .12); }
.pipi-err { min-height: 24px; color: #e03131; font-weight: 700; margin: 4px 0 10px; }
.pipi-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------------------------------------------------------------- 登录页 */
.pipi-page {
  margin: 0; min-height: 100vh; color: var(--pipi-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  background:
    radial-gradient(ellipse 240px 70px at 15% 12%, rgba(255,255,255,.9), transparent 70%),
    radial-gradient(ellipse 280px 80px at 85% 22%, rgba(255,255,255,.85), transparent 70%),
    radial-gradient(circle at 50% 120%, #b2f2bb 0 34%, transparent 34.2%),
    linear-gradient(180deg, #a5d8ff, #e7f5ff 60%, #fff9db);
  -webkit-tap-highlight-color: transparent;
}
.pipi-login { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px;
  /* 输入框自带约 20 个字的默认宽度，会把卡片撑出屏幕：列宽封顶，卡片可以缩 */
  grid-template-columns: minmax(0, 440px); justify-content: center; }
.pipi-card {
  width: 100%; min-width: 0; background: #fff; border-radius: 36px; padding: 26px 24px 22px; text-align: center;
  box-shadow: 0 8px 0 rgba(51, 48, 74, .1), 0 24px 60px rgba(51, 48, 74, .12); position: relative;
}
.pipi-card .pipi-mascot { width: 150px; height: 150px; margin: -96px auto 4px; border-radius: 50%; background: #fff; padding: 10px;
  box-shadow: 0 8px 0 rgba(51, 48, 74, .08); animation: pipi-bob 2.4s ease-in-out infinite; }
.pipi-card .pipi-mascot img { width: 100%; height: 100%; object-fit: contain; }
@keyframes pipi-bob { 50% { transform: translateY(-8px) rotate(-2deg); } }
.pipi-card h1 { margin: 6px 0 2px; font-size: 32px; color: var(--pipi-red); letter-spacing: 2px; }
.pipi-card .pipi-hello { color: var(--pipi-muted); margin: 0 0 18px; font-size: 17px; }
.pipi-card form { text-align: left; }
.pipi-pw { position: relative; }
.pipi-pw .pipi-input { padding-right: 60px; }
.pipi-eye { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border: 0; background: none;
  font-size: 22px; cursor: pointer; }
.pipi-foot { margin-top: 14px; color: var(--pipi-muted); font-size: 14px; }

/* ---------------------------------------------------------------- 管理页 */
.pipi-admin { max-width: 1180px; margin: 0 auto; padding: 18px 16px 60px; }
.pipi-admin h2 { font-size: 22px; margin: 26px 4px 12px; }
.pipi-panel { background: #fff; border-radius: 26px; padding: 16px; box-shadow: var(--pipi-lift), 0 10px 28px rgba(51, 48, 74, .06); }
.pipi-users { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.pipi-user { background: #fff; border-radius: 24px; padding: 16px; box-shadow: var(--pipi-lift); border-top: 6px solid #74c0fc; }
.pipi-user.admin { border-top-color: #ffa94d; }
.pipi-user.disabled { opacity: .6; border-top-color: #ced4da; }
.pipi-user-head { display: flex; align-items: center; gap: 12px; }
.pipi-user-head .pipi-avatar { width: 56px; height: 56px; font-size: 34px; flex: none; }
.pipi-user-head b { font-size: 20px; }
.pipi-tag { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: #fff3bf; color: #8a6a00; margin-left: 6px; vertical-align: middle; }
.pipi-tag.off { background: #f1f3f5; color: #868e96; }
.pipi-kv { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; margin: 12px 0; font-size: 15px; }
.pipi-kv dt { color: var(--pipi-muted); }
.pipi-kv dd { margin: 0; }
.pipi-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.pipi-table { width: 100%; border-collapse: collapse; font-size: 15px; }
table.pipi-table th, table.pipi-table td { padding: 10px 8px; border-bottom: 2px solid #f3effa; text-align: left; white-space: nowrap; }
table.pipi-table th { color: var(--pipi-muted); font-weight: 700; }
.pipi-ok { color: #2b8a3e; font-weight: 700; }
.pipi-no { color: #e03131; font-weight: 700; }
.pipi-avatars { display: flex; flex-wrap: wrap; gap: 6px; }
.pipi-avatars button { width: 46px; height: 46px; border-radius: 14px; border: 3px solid transparent; background: #f8f5fc; font-size: 26px; cursor: pointer; }
.pipi-avatars button.on { border-color: #4dabf7; background: #e7f5ff; }
.pipi-form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 14px; }
select.pipi-input { background-image: none; }
.pipi-filter { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.pipi-filter .pipi-input { width: auto; min-width: 180px; min-height: 44px; font-size: 16px; }