/* ═══════════════════════════════════════════
   app.css — 基础样式 / 登录 / 通用组件
   ═══════════════════════════════════════════ */

:root {
  --bg: #0f0f1a;
  --card-bg: #1a1a2e;
  --card-hover: #222244;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #ffd700;
  --accent2: #4ECDC4;
  --accent3: #FF6B6B;
  --accent4: #BD10E0;
  --green: #2ecc71;
  --red: #e74c3c;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
/* ── pp138：全站字号缩放（学生自己在「账号设置」里调，存在 petpark_fontscale）──
   全站字号几乎都写成 rem，所以只要缩放根字号，整站一起变大变小，不用挨个改组件。
   用 100%（= 浏览器默认字号）做基准而不是写死 16px：孩子若把浏览器默认字号调大过，
   这里乘上去仍然跟着放大，不会被我们按回 16px。
   四档 → 1 / 1.12 / 1.25 / 1.4 倍（16 / 17.9 / 20 / 22.4px）。 */
html { font-size: calc(100% * var(--fs, 1)); }
html, body { height: 100%; }
body {
  font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
.bg-pattern {
  position: fixed; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(255,215,0,0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(78,205,196,0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 50% 80%, rgba(255,107,107,0.04) 0%, transparent 50%);
  pointer-events: none; z-index: 0;
}

/* ── 按钮 ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 10px 24px; border-radius: 22px; border: none;
  font-size: 0.9rem; font-weight: 700; cursor: pointer;
  transition: all 0.2s; font-family: inherit;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), #ff8c00); color: #1a1a2e; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,215,0,0.2); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-secondary { background: var(--card-bg); color: var(--text); border: 1px solid rgba(255,255,255,0.12); }
.btn-secondary:hover { background: var(--card-hover); }
.btn-danger { background: rgba(231,76,60,0.15); color: var(--red); border: 1px solid rgba(231,76,60,0.4); }
.btn-danger:hover { background: rgba(231,76,60,0.28); }
.btn-success { background: linear-gradient(135deg, #2ecc71, #27ae60); color: #0f0f1a; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid rgba(255,255,255,0.15); }
.btn-outline:hover { background: rgba(255,255,255,0.06); }
.btn-small { padding: 6px 14px; border-radius: 16px; font-size: 0.78rem; font-weight: 600; }
.btn-tiny { padding: 3px 10px; border-radius: 10px; font-size: 0.7rem; font-weight: 600; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Toast ── */
.pp-toast {
  position: fixed; top: 24px; left: 50%; transform: translateX(-50%); z-index: 900;
  padding: 12px 24px; border-radius: 24px; font-weight: 700; font-size: 0.95rem;
  animation: ppToastIn 0.3s;
  pointer-events: none; max-width: 86vw; text-align: center;
  transition: opacity 0.3s;
}
.pp-toast.out { opacity: 0; }
@keyframes ppToastIn { from { opacity: 0; transform: translateX(-50%) translateY(-10px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
.pp-toast-success { background: rgba(46,204,113,0.2); border: 1px solid var(--green); color: var(--green); }
.pp-toast-fail { background: rgba(231,76,60,0.2); border: 1px solid var(--red); color: var(--red); }
.pp-toast-info { background: rgba(78,205,196,0.15); border: 1px solid var(--accent2); color: var(--accent2); }

/* ── 登录屏 ── */
.pp-login {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.pp-login-card {
  background: var(--card-bg); border-radius: 24px; padding: 40px 32px 28px;
  width: 100%; max-width: 380px; text-align: center;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 24px 70px rgba(0,0,0,0.55);
  position: relative; z-index: 1;
}
.pp-login-emoji { font-size: 3.4rem; margin-bottom: 8px; }
.pp-login-card h1 {
  font-size: 1.6rem; font-weight: 800; letter-spacing: 2px; margin-bottom: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.pp-login-sub { color: var(--text-dim); font-size: 0.82rem; margin-bottom: 26px; }
.pp-field { margin-bottom: 12px; }
.pp-login-error {
  color: var(--red); font-size: 0.8rem; min-height: 18px; margin: 2px 0 8px;
  text-align: center; word-break: break-all;
}
.pp-login-btn { width: 100%; padding: 12px; font-size: 1rem; border-radius: 14px; }
/* 找回密码：贴在密码框右侧，用暖橙色和下面蓝色的注册链接区分开（第 2 项） */
.pp-pwd-field { display: flex; align-items: center; gap: 8px; }
.pp-pwd-field .pp-input { flex: 1 1 auto; min-width: 0; }
#login-screen .pp-forgot {
  flex: 0 0 auto; white-space: nowrap;
  color: #E8590C; font-size: 0.8rem; font-weight: 700;
  padding: 6px 4px; border-radius: 8px; text-decoration: none;
}
#login-screen .pp-forgot:hover { color: #B3420A; text-decoration: underline; }
@media (max-width: 380px) {
  /* 极窄屏：字号收一点，别把密码框挤没 */
  #login-screen .pp-forgot { font-size: 0.74rem; padding: 6px 2px; }
}
.pp-login-hint { color: var(--text-dim); font-size: 0.72rem; margin-top: 16px; }
.pp-login-back { display: inline-block; color: var(--text-dim); font-size: 0.72rem; margin-top: 10px; text-decoration: none; }
.pp-login-back:hover { color: #fff; }

/* ── 注册屏 ── */
.pp-login-switch { color: var(--accent2); font-size: 0.78rem; text-decoration: none; cursor: pointer; font-weight: 600; }
.pp-login-switch:hover { text-decoration: underline; }
.pp-reg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
/* 注册屏：字段标签 + 必填标记 + 未选高亮 */
.pp-reg-label { display: block; font-size: 0.76rem; font-weight: 600; color: var(--text-dim); margin-bottom: 5px; }
.pp-req { color: var(--red); font-weight: 800; }
.pp-reg-item { margin-bottom: 0; }
.pp-select.pp-invalid, .pp-input.pp-invalid {
  border-color: var(--red); background: rgba(226, 74, 74, 0.10);
}
@keyframes ppShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}
.pp-shake { animation: ppShake 0.32s ease; }
#register-screen { align-items: flex-start; padding-top: clamp(14px, 4vh, 40px); }
#register-screen .pp-login-card { max-height: 94vh; overflow-y: auto; padding-top: 30px; }
#register-screen .pp-login-card h1 { font-size: 1.4rem; }
#register-screen .pp-login-sub { margin-bottom: 18px; }
#register-screen .pp-login-hint { margin-top: 12px; }

/* ── 找回密码屏 ── */
.pp-secq-box {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px; padding: 10px 12px; font-weight: 600; font-size: 0.88rem;
  text-align: left; line-height: 1.5;
}
.pp-reset-done { text-align: center; font-weight: 700; font-size: 1.02rem; line-height: 1.9; margin: 4px 0 14px; }
#reset-screen .pp-login-switch { display: inline-block; margin-top: 14px; }
#reset-screen .pp-field { text-align: left; }

/* ── pp138 账号设置屏（原「找回密码」入口，改成三件事：改账号 / 改密码 / 调字号）──
   一块一块分开写，孩子才知道「①先证明是我 → ②想改成什么 → ③字太小就调」不是一件事。
   整屏比登录卡高（三块 + 按钮），所以允许内部滚动，别把「保存」压在屏幕外。 */
#acct-screen { align-items: flex-start; padding-top: clamp(10px, 3vh, 28px); overflow-y: auto; }
#acct-screen .pp-login-card {
  max-height: 96vh; max-height: 96dvh; overflow-y: auto; overflow-x: hidden;
  padding: 24px 22px 20px; text-align: left;
  -webkit-overflow-scrolling: touch;
}
#acct-screen .pp-login-emoji { text-align: center; font-size: 2.1rem; margin-bottom: 0; }
#acct-screen .pp-login-card h1 { text-align: center; font-size: 1.3rem; margin-bottom: 4px; }
#acct-screen .pp-login-sub { text-align: center; margin-bottom: 12px; font-size: 0.76rem; }
/* 压缩字段间距：整屏有 5 个输入框 + 字号块，390×844 上正好一屏放完（不用滚就能看到「保存」） */
#acct-screen .pp-field { margin-bottom: 9px; }
#acct-screen .pp-reg-label { margin-bottom: 4px; font-size: 0.74rem; }
.pp-acct-sec {
  border: 1px solid rgba(255,255,255,0.08); border-radius: 14px;
  background: rgba(255,255,255,0.025);
  padding: 11px 12px 5px; margin-bottom: 10px;
}
.pp-acct-sec-title { font-size: 0.84rem; font-weight: 800; color: var(--accent); margin-bottom: 8px; }
.pp-acct-note { font-size: 0.72rem; font-weight: 600; color: var(--text-dim); }
/* pp141：从乐园里打开「账号设置」时，「现在用的账号」是预填 + 锁定的（账号就是当前登录的这个）。
   锁定要看得出来是「不用你填」而不是「坏了点不动」→ 淡底 + 虚线边 + 记号笔光标。 */
.pp-input.pp-readonly {
  background: rgba(255, 255, 255, 0.02);
  border-style: dashed;
  color: var(--text-dim);
  cursor: default;
}
#acct-screen .pp-login-hint { margin-top: 8px; text-align: center; font-size: 0.7rem; }
#acct-screen .pp-login-switch { display: block; text-align: center; margin-top: 10px; }

/* 字号四档：点一下立刻生效（存 localStorage，跟账号无关），下面给一句样文看效果。
   pp138 放在卡片最上面 —— 需要它的孩子连字都看不清，不能让他先滚一屏才找到。 */
.pp-acct-font {
  border: 1px solid rgba(78,205,196,0.28); border-radius: 14px;
  background: rgba(78,205,196,0.07);
  padding: 9px 11px 8px; margin-bottom: 10px;
}
.pp-acct-font-row { display: flex; align-items: center; gap: 8px; }
.pp-acct-font-lbl { flex: 0 0 auto; font-size: 0.8rem; font-weight: 800; color: var(--accent2); white-space: nowrap; }
.fs-opts { display: flex; gap: 6px; flex: 1 1 auto; min-width: 0; }
.fs-opt {
  flex: 1 1 0; min-width: 0; padding: 7px 3px; border-radius: 10px;
  border: 2px solid rgba(255,255,255,0.1); background: rgba(255,255,255,0.03);
  color: var(--text); font-family: inherit; font-weight: 700; font-size: 0.8rem;
  cursor: pointer; transition: all 0.15s ease;
}
.fs-opt:hover { border-color: var(--accent2); }
.fs-opt.active {
  border-color: var(--accent2); background: rgba(78,205,196,0.16);
  box-shadow: 0 0 0 3px rgba(78,205,196,0.15);
}
.fs-preview {
  margin-top: 8px; padding: 7px 10px; border-radius: 9px;
  background: rgba(255,255,255,0.04); border: 1px dashed rgba(255,255,255,0.12);
  font-size: 0.9rem; line-height: 1.45;
}

/* ── 通用输入 ── */
.pp-input, .pp-select, .pp-textarea {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px; padding: 9px 12px; color: var(--text); font-size: 0.88rem;
  outline: none; font-family: inherit; width: 100%;
}
.pp-input:focus, .pp-select:focus, .pp-textarea:focus { border-color: var(--accent2); }
.pp-textarea { resize: vertical; min-height: 90px; line-height: 1.6; }
.pp-select option { background: var(--card-bg); color: var(--text); }
.pp-input-sm { width: 90px; text-align: center; }

/* ── 自绘下拉（替代系统原生下拉列表，见 js/ui-widgets.js） ──
   原生 <select> 被 .pp-sel-native 视觉隐藏，但值与事件语义照旧。
   注意：kid-app.css 是最后加载的覆盖层，这里用了 var() 兜底，
   并且类名唯一（.pp-sel-*），不会被那 35 个同权重选择器盖掉。 */
.pp-sel { position: relative; display: inline-block; vertical-align: middle; }
.pp-sel.pp-sel-full { display: block; width: 100%; }
.pp-sel-native {
  position: absolute !important; width: 1px !important; height: 1px !important;
  padding: 0 !important; margin: -1px !important; border: 0 !important;
  opacity: 0 !important; pointer-events: none !important; overflow: hidden !important;
  clip: rect(0 0 0 0) !important; white-space: nowrap !important;
}
.pp-sel-btn {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  width: 100%; box-sizing: border-box; text-align: left; cursor: pointer;
  font-family: inherit; font-size: 0.88rem; line-height: 1.4;
  padding: 8px 11px; border-radius: 10px;
  border: 2px solid var(--kid-line, rgba(120,110,170,0.22));
  background: var(--card-bg, #fff); color: var(--text, #3B3557);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.pp-sel.pp-sel-inline .pp-sel-btn { width: auto; }
.pp-sel-btn:hover { border-color: var(--accent2); }
.pp-sel-btn.is-open { border-color: var(--accent2); box-shadow: 0 0 0 3px rgba(78,205,196,0.18); }
.pp-sel-btn.is-placeholder .pp-sel-label { color: var(--text-dim, #8E86A6); }
.pp-sel-btn:disabled { opacity: 0.6; cursor: default; }
.pp-sel-btn.pp-invalid { border-color: var(--red); background: rgba(226,74,74,0.10); }
.pp-sel-btn.pp-shake { animation: ppShake 0.32s ease; }
.pp-sel-label { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pp-sel-caret { flex: 0 0 auto; font-size: 0.7rem; color: var(--text-dim, #8E86A6); transition: transform 0.15s; }
.pp-sel-btn.is-open .pp-sel-caret { transform: rotate(180deg); }

.pp-sel-pop {
  position: fixed; z-index: 9000; max-height: 264px; overflow-y: auto;
  background: var(--card-bg, #fff); color: var(--text, #3B3557);
  border: 2px solid var(--kid-line, rgba(120,110,170,0.22)); border-radius: 14px;
  box-shadow: 0 16px 40px rgba(60,50,90,0.24); padding: 6px;
  animation: ppFadeIn 0.12s;
  /* 选项多的时候要能顺畅滚：不把滚动链传给页面、iOS 用原生惯性滚动、滚动条常显一点 */
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(120,110,170,0.45) transparent;
}
.pp-sel-pop::-webkit-scrollbar { width: 9px; }
.pp-sel-pop::-webkit-scrollbar-track { background: transparent; }
.pp-sel-pop::-webkit-scrollbar-thumb {
  background: rgba(120,110,170,0.38); border-radius: 5px;
  border: 2px solid transparent; background-clip: padding-box;
}
.pp-sel-pop::-webkit-scrollbar-thumb:hover { background: rgba(120,110,170,0.6); background-clip: padding-box; }
.pp-sel-opt {
  padding: 9px 12px; border-radius: 9px; font-size: 0.88rem; cursor: pointer;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.pp-sel-opt:hover { background: #EAFBF9; }
.pp-sel-opt.selected { background: #EAFBF9; color: #2FA98C; font-weight: 700; }
.pp-sel-opt.is-disabled { color: var(--text-dim, #8E86A6); cursor: default; opacity: 0.7; }
.pp-sel-opt.is-disabled:hover { background: transparent; }

/* ── 自绘联想输入（替代原生 datalist） ── */
.pp-sug-pop {
  position: fixed; z-index: 9000; max-height: 240px; overflow-y: auto;
  background: var(--card-bg, #fff); border: 2px solid var(--kid-line, rgba(120,110,170,0.22));
  border-radius: 14px; box-shadow: 0 16px 40px rgba(60,50,90,0.24); padding: 6px;
  animation: ppFadeIn 0.12s;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(120,110,170,0.45) transparent;
}
.pp-sug-pop::-webkit-scrollbar { width: 9px; }
.pp-sug-pop::-webkit-scrollbar-track { background: transparent; }
.pp-sug-pop::-webkit-scrollbar-thumb {
  background: rgba(120,110,170,0.38); border-radius: 5px;
  border: 2px solid transparent; background-clip: padding-box;
}
.pp-sug-opt { padding: 9px 12px; border-radius: 9px; font-size: 0.88rem; cursor: pointer; color: var(--text, #3B3557); }
.pp-sug-opt:hover { background: #EAFBF9; }

/* ── 通用弹窗 ── */
.pp-modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,0.72); z-index: 500;
  display: flex; align-items: center; justify-content: center; padding: 16px;
  animation: ppFadeIn 0.2s;
}
@keyframes ppFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes ppSlideUp { from { transform: translateY(24px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.pp-modal-card {
  background: var(--card-bg); border-radius: 20px; padding: 24px;
  width: 100%; max-width: 460px; max-height: 88vh; overflow-y: auto;
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 20px 60px rgba(0,0,0,0.55); animation: ppSlideUp 0.25s;
}
.pp-modal-card.wide { max-width: 640px; }
.pp-modal-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,0.06);
}
.pp-modal-head h3 { font-size: 1.05rem; }
.pp-modal-close {
  background: none; border: none; color: var(--text-dim); font-size: 1.2rem;
  cursor: pointer; padding: 4px 8px; border-radius: 6px; font-family: inherit;
}
.pp-modal-close:hover { color: #fff; background: rgba(255,255,255,0.06); }
.pp-form-row { margin-bottom: 12px; }
.pp-form-row label { display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 5px; font-weight: 600; }
.pp-dim { color: var(--text-dim); }
.pp-empty { text-align: center; color: var(--text-dim); padding: 36px 0; font-size: 0.88rem; }
.pp-empty .icon { font-size: 2.4rem; margin-bottom: 10px; }

/* ── 教师端整体容器放宽 ── */
body.mode-teacher .container { max-width: 1180px; height: auto; overflow: visible; }
body.mode-teacher { overflow: auto; }

/* ── 头像点开放大（pp94）──
   头像在留言条 / 排行榜里只有 20~28px，照片看不清 → 点一下弹全屏大图。
   逻辑在 core.js 的 P.zoomImage / P.bindAvatarZoom（全局一个委托点击）。
   ⚠ 遮罩层级要压过安装小药丸（2147483000），否则左下角会露出来。 */
img.av-img { cursor: zoom-in; }

.pp-zoom-mask {
  position: fixed; inset: 0; z-index: 2147483600;
  display: none; align-items: center; justify-content: center;
  padding: 18px; cursor: zoom-out;
  background: rgba(8, 6, 20, 0.86);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
  animation: pp-zoom-fade 0.16s ease-out;
}
.pp-zoom-mask.show { display: flex; }
.pp-zoom-mask .pp-zoom-img {
  max-width: 92vw; max-height: 84vh; width: auto; height: auto;
  object-fit: contain; background: #fff; border-radius: 14px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.55);
  transform: scale(0.96); transition: transform 0.16s ease-out;
}
.pp-zoom-mask.show .pp-zoom-img { transform: scale(1); }
.pp-zoom-hint {
  position: absolute; left: 0; right: 0; bottom: 18px;
  text-align: center; pointer-events: none;
  color: rgba(255, 255, 255, 0.82); font-size: 0.82rem; letter-spacing: 0.3px;
}
/* 打开大图时锁住背后页面滚动 */
body.pp-zoom-lock { overflow: hidden; }
@keyframes pp-zoom-fade { from { opacity: 0; } to { opacity: 1; } }