/* ===== 背单词 · 样式（浅色主题，手机友好） ===== */
:root{
  --bg:#f5f7fb; --card:#ffffff; --line:#e5e8ef; --line2:#eef1f6;
  --text:#1f2430; --muted:#7a8194; --soft:#f8fafc;
  --primary:#2563eb; --primary-d:#1d4ed8; --primary-soft:#eef4ff;
  --red:#dc2626; --red-soft:#fef2f2; --green:#16a34a; --green-soft:#f0fdf4;
  --amber:#d97706; --amber-soft:#fffbeb;
  --radius:14px; --shadow:0 1px 3px rgba(20,30,60,.06), 0 8px 24px rgba(20,30,60,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px; line-height:1.6; -webkit-text-size-adjust:100%;
}
h1,h2,h3{margin:0;font-weight:650}
h1{font-size:24px}
h2{font-size:17px}
h3{font-size:16px}
p{margin:0 0 8px}
a{color:var(--primary)}
.muted{color:var(--muted)}
.small{font-size:13px}
.hidden{display:none !important}
[hidden]{display:none !important}

/* ---- 视图切换 ---- */
.view{display:none}
.view.active{display:block}
.page{display:none;padding:16px;max-width:1080px;margin:0 auto}
.page.active{display:block}

/* ---- 登录 ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-card{width:100%;max-width:392px;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px 26px;box-shadow:var(--shadow);text-align:center}
.login-logo{font-size:44px;line-height:1}
.login-card h1{margin:8px 0 4px}
.login-card form{text-align:left;margin-top:18px}
label{display:block;margin-bottom:12px;font-size:13px;color:var(--muted);font-weight:600}
input,select,textarea{font-family:inherit;font-size:15px}
input[type=text],input[type=password],input[type=number],input:not([type]),select,textarea{
  width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--text);outline:none;transition:border-color .15s, box-shadow .15s;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.tip{margin-top:16px;font-size:12px}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border-radius:10px;border:1px solid transparent;background:#fff;color:var(--text);
  font-size:15px;font-weight:600;cursor:pointer;transition:all .15s;white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-green{background:var(--green);color:#fff}
.btn-outline{border-color:var(--line);background:#fff}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--soft);color:var(--text)}
.btn-block{width:100%;margin-top:6px}
.btn-sm{padding:6px 12px;font-size:13px}
.btn-lg{padding:14px 40px;font-size:17px}
.btn-danger{background:var(--red);color:#fff}

/* ---- 顶栏 ---- */
.topbar{
  position:sticky;top:0;z-index:30;display:flex;justify-content:space-between;align-items:center;
  padding:10px 16px;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-left,.topbar-right{display:flex;align-items:center;gap:10px}
.brand{font-weight:700}
.badge{background:var(--primary-soft);color:var(--primary);font-size:12px;font-weight:700;padding:2px 9px;border-radius:20px}
.badge.gray{background:var(--soft);color:var(--muted)}

/* ---- 卡片 / 面板 ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.card .k{font-size:12px;color:var(--muted);font-weight:600}
.card .v{font-size:24px;font-weight:750;line-height:1.25}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px;box-shadow:var(--shadow)}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.row-gap{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:12px}
.center-gap{display:flex;justify-content:center;margin-top:22px}
.inline-field{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--muted)}
.num{width:88px !important;margin:0 !important;display:inline-block}
.checkbox{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--muted);margin:0}
.checkbox input{width:auto !important;margin:0 !important}
.field-row{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px;font-size:14px;color:var(--text);font-weight:600}
.field-row input[type=text],.field-row input:not([type]),.field-row select,.field-row input.input{max-width:260px;margin-top:0}
.field-row input[type=checkbox]{width:auto;margin:0;transform:scale(1.2)}
.alert{padding:10px 14px;border-radius:10px;font-size:14px;margin-top:12px}
.alert-error{background:var(--red-soft);color:var(--red);border:1px solid #fecaca}
.alert-ok{background:var(--green-soft);color:var(--green);border:1px solid #bbf7d0}

/* ---- 单元网格 ---- */
.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.unit-item{
  border:1px solid var(--line);border-radius:12px;padding:11px 13px;cursor:pointer;background:#fff;
  transition:all .15s;position:relative;
}
.unit-item:hover{border-color:var(--primary);background:var(--primary-soft)}
.unit-item.sel{border-color:var(--primary);background:var(--primary-soft);box-shadow:0 0 0 2px rgba(37,99,235,.15)}
.unit-item .u-no{font-size:12px;color:var(--muted);font-weight:700}
.unit-item .u-name{font-weight:600;font-size:14px;word-break:break-word}
.unit-item .u-meta{font-size:12px;color:var(--muted);margin-top:4px;display:flex;gap:8px;flex-wrap:wrap}
.unit-item.done{border-left:3px solid var(--green)}
.dot-green{color:var(--green);font-weight:700}
.dot-amber{color:var(--amber);font-weight:700}
.dot-blue{color:var(--primary);font-weight:700}
.unit-item.resume{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary) inset}

/* ---- 背单词 ---- */
.practice-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.practice-title{flex:1;font-weight:700;text-align:center;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.progress{height:7px;background:var(--line2);border-radius:99px;overflow:hidden;margin-bottom:18px}
#pr-bar{height:100%;width:0;background:linear-gradient(90deg,var(--primary),#60a5fa);border-radius:99px;transition:width .25s}
.card-question{
  background:var(--card);border:1px solid var(--line);border-radius:20px;padding:34px 22px 24px;
  text-align:center;box-shadow:var(--shadow);
}
.q-badge{display:inline-block;font-size:12px;font-weight:700;padding:3px 11px;border-radius:20px;background:var(--primary-soft);color:var(--primary);margin-bottom:14px}
.q-badge.review{background:var(--amber-soft);color:var(--amber)}
.q-chinese{font-size:34px;font-weight:750;line-height:1.35;word-break:break-word}
.q-head{display:flex;align-items:center;justify-content:center;gap:14px}
.btn-speak{
  flex:none;width:46px;height:46px;border-radius:999px;border:1px solid var(--line);
  background:var(--card);font-size:21px;line-height:1;cursor:pointer;color:var(--text);
  display:flex;align-items:center;justify-content:center;
  transition:transform .08s, box-shadow .15s, border-color .15s;
}
.btn-speak:hover{box-shadow:0 3px 12px rgba(20,30,60,.12);border-color:#c7d2fe}
.btn-speak:active{transform:scale(.92)}
.btn-speak.playing{border-color:var(--primary);background:var(--primary-soft);animation:speak-pulse .7s ease infinite}
@keyframes speak-pulse{50%{transform:scale(1.12)}}
.q-tags{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.q-tags:empty{margin-top:0}
.q-meta{color:var(--muted);font-size:14px;margin-top:8px;min-height:22px}
.q-meta:empty{display:none}

/* ---- 词性 / 词组徽章 ---- */
.pos-tag{
  display:inline-block;font-size:12px;font-weight:700;line-height:1.6;
  padding:1px 9px;border-radius:8px;margin-left:6px;vertical-align:middle;
  background:var(--soft);color:#5b6478;border:1px solid var(--line);
}
.pos-tag.phrase{background:#eef6ff;color:#0369a1;border-color:#bae6fd}
.q-tags .pos-tag{font-size:13px;padding:3px 13px;margin-left:0}
.q-tags .pos-tag.phrase{background:#e0f2fe;color:#075985;border-color:#7dd3fc;font-size:13.5px}
.q-tip.is-phrase{color:#0369a1;font-weight:600}
.q-tip.is-phrase b{color:#075985}
.q-input{
  width:100%;max-width:420px;margin:22px auto 0;display:block;text-align:center;
  font-size:21px;letter-spacing:.4px;padding:14px 16px;border:2px solid var(--line);border-radius:14px;
}
.q-input:focus{border-color:var(--primary)}
.q-tip{margin-top:12px}
kbd{background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:12px;font-family:inherit}
.practice-nav{display:flex;justify-content:space-between;align-items:center;margin-top:20px}

/* ---- 结果 ---- */
.result-hero{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  text-align:center;margin-bottom:16px;box-shadow:var(--shadow);
}
.result-score{font-size:46px;font-weight:800;line-height:1.1}
.result-sub{color:var(--muted);margin-top:4px}
.res-item{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px dashed var(--line2);align-items:baseline}
.res-item:last-child{border-bottom:0}
.res-left{font-weight:650}
.res-right{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:14px}
.res-wrong .res-left{color:var(--red)}
.res-wrong .your{color:var(--red);text-decoration:line-through}
.res-wrong .right{color:var(--green);font-weight:700}
.res-ok .res-right{color:var(--green)}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:1px 7px;border-radius:6px;margin-left:6px;vertical-align:middle}
.tag.stage3{background:var(--amber-soft);color:var(--amber)}
.tag.stage7{background:#eef2ff;color:#4f46e5}
.tag.mastered{background:var(--green-soft);color:var(--green)}

/* ---- 表格 ---- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line2);white-space:nowrap}
th{color:var(--muted);font-size:12px;font-weight:700;background:var(--soft)}
tbody tr:hover{background:var(--soft)}
td.wrap{white-space:normal;min-width:120px}
.link{color:var(--primary);cursor:pointer;font-weight:600;text-decoration:none}
.link:hover{text-decoration:underline}
.pager{display:flex;gap:8px;align-items:center;justify-content:flex-end;margin-top:12px;font-size:13px;color:var(--muted)}

/* ---- 标签页 ---- */
.tabs{display:flex;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:5px;margin-bottom:16px}
.tabs button{flex:1;padding:9px;border:0;background:transparent;border-radius:9px;font-size:14px;font-weight:650;color:var(--muted);cursor:pointer;font-family:inherit}
.tabs button.active{background:var(--primary);color:#fff}
.tabs-mini{display:flex;gap:6px;margin:16px 0 4px;justify-content:center}
.tabs-mini button{padding:7px 20px;border:1px solid var(--line);background:#fff;border-radius:20px;font-size:13px;font-weight:650;color:var(--muted);cursor:pointer;font-family:inherit}
.tabs-mini button.active{background:var(--primary);border-color:var(--primary);color:#fff}
.tabpane{display:none}
.tabpane.active{display:block}

/* ---- 弹窗 / 提示 ---- */
.modal{position:fixed;inset:0;background:rgba(20,28,48,.42);display:flex;align-items:center;justify-content:center;z-index:100;padding:18px}
.modal-box{background:#fff;border-radius:16px;width:100%;max-width:560px;max-height:88vh;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(20,30,60,.25)}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:16px 18px;border-bottom:1px solid var(--line)}
.modal-body{padding:18px;overflow-y:auto}
.modal-foot{padding:14px 18px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-end}
.modal-body textarea{min-height:150px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px}
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%);background:#1f2430;color:#fff;padding:11px 20px;border-radius:10px;font-size:14px;font-weight:600;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.25)}

/* ---- 词库：视图切换 / 导出 ---- */
.view-bar{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line2)}
.grow{flex:1}
.seg{display:inline-flex;background:var(--soft);border:1px solid var(--line);border-radius:9px;padding:2px}
.seg button{
  padding:6px 14px;border:0;background:transparent;border-radius:7px;
  font-family:inherit;font-size:13px;font-weight:650;color:var(--muted);cursor:pointer;
}
.seg button.active{background:#fff;color:var(--primary);box-shadow:0 1px 3px rgba(20,30,60,.12)}
.merged-hint{background:var(--primary-soft);border:1px solid #dbe6ff;color:#1e40af;border-radius:10px;padding:9px 12px;font-size:13px;margin-bottom:10px}
td.ph{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:#4b5563}
.unit-chip{display:inline-block;background:var(--soft);border:1px solid var(--line);border-radius:6px;padding:0 6px;margin:1px 3px 1px 0;font-size:11px;color:var(--muted)}

/* ---- 音标编辑器 ---- */
.ipa-panel{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--soft);margin-bottom:12px}
.ipa-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px}
.ipa-head b{font-size:13px;color:var(--text)}
.ipa-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:6px}
.ipa-row .ipa-label{font-size:11px;color:var(--muted);font-weight:700;width:34px;flex:none}
.ipa-btn{
  min-width:30px;padding:4px 7px;border:1px solid var(--line);background:#fff;border-radius:7px;
  font-size:15px;line-height:1.3;cursor:pointer;font-family:"Segoe UI","Lucida Sans Unicode",inherit;
}
.ipa-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.ipa-preview{margin-top:4px;font-size:13px;color:var(--muted)}
.ipa-preview b{color:var(--text);font-family:ui-monospace,Menlo,Consolas,monospace}

/* ---- 导出弹窗 ---- */
.exp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 14px;margin:4px 0 12px}
.exp-grid label{display:flex;align-items:center;gap:8px;margin:0;font-size:14px;font-weight:600;color:var(--text)}
.exp-grid input{width:auto !important;margin:0 !important;transform:scale(1.15)}
.exp-preview{margin-top:8px;padding:10px 12px;border:1px dashed var(--line);border-radius:10px;background:var(--soft);font-size:13px;color:var(--muted)}

/* ---- 手机 ---- */
@media (max-width:620px){
  .page{padding:12px}
  .topbar{padding:8px 12px}
  .topbar-right .muted{display:none}
  .q-chinese{font-size:28px}
  .q-input{font-size:19px}
  .result-score{font-size:38px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .unit-grid{grid-template-columns:1fr}
  .field-row{flex-direction:column;align-items:flex-start;gap:6px}
  .field-row input,.field-row select{max-width:100% !important;width:100%}
  .login-card{padding:24px 20px}
}