/* 每日英语 · 干净学习风 */
:root{
  --bg:#f6f7f9; --card:#ffffff; --ink:#23272e; --sub:#8a919c;
  --line:#e8eaee; --accent:#3b82f6; --accent-soft:#eaf1fe;
  --green:#22a06b; --green-soft:#e7f6ef; --amber:#d97706; --amber-soft:#fdf3e3;
  --red:#dc4c4c; --red-soft:#fdeaea; --radius:14px;
  --shadow:0 1px 2px rgba(20,25,35,.05),0 4px 14px rgba(20,25,35,.05);
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",-apple-system,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6;-webkit-user-select:none;user-select:none}
#app{display:flex;min-height:100vh}
/* 侧栏 */
#sidebar{width:220px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;flex-shrink:0}
.brand{padding:22px 20px 16px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--line)}
.brand-logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:19px}
.brand-name{font-weight:700;font-size:16px;display:flex;flex-direction:column}
.brand-name span{font-size:10px;color:var(--sub);letter-spacing:1.5px;font-weight:500}
#nav{padding:14px 10px;flex:1}
#nav a{display:flex;align-items:center;gap:11px;padding:11px 14px;border-radius:10px;color:#4c5361;font-weight:500;cursor:pointer;margin-bottom:3px;transition:background .15s,color .15s}
#nav a:hover{background:#f1f3f7}
#nav a.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
#nav .ico{font-size:17px;width:22px;text-align:center}
.side-foot{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:13px;color:var(--sub)}
.streak-mini{font-weight:600;color:var(--amber)}
.lv-mini{font-weight:700;color:var(--accent)}
/* 主区 */
#main{flex:1;padding:28px 34px 60px;max-width:1060px;margin:0 auto;width:100%}
.view h1{font-size:24px;font-weight:700;margin-bottom:4px}
.view .sub{color:var(--sub);font-size:13px;margin-bottom:22px}
/* 卡片 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:16px}
.card h3{font-size:15px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media(max-width:900px){.grid2,.grid3{grid-template-columns:1fr}}
/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:10px;padding:10px 18px;font-size:14px;font-weight:600;cursor:pointer;transition:transform .08s,box-shadow .15s;background:#eef1f5;color:#3d4450}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.primary{background:var(--accent);color:#fff}
.btn.green{background:var(--green);color:#fff}
.btn.ghost{background:transparent;border:1px solid var(--line);color:#5a6270}
.btn.warn{background:var(--amber-soft);color:var(--amber)}
.btn.red{background:var(--red-soft);color:var(--red)}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn.big{padding:14px 24px;font-size:16px}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
/* 进度条 */
.bar{height:8px;background:#eef0f4;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:var(--accent);transition:width .4s}
.bar.green i{background:var(--green)}
.bar.amber i{background:var(--amber)}
/* 徽章/标签 */
.tag{display:inline-block;font-size:11px;font-weight:600;padding:2px 9px;border-radius:99px;margin-right:6px}
.tag.a1{background:#e7f6ef;color:#1d7a4f}.tag.a2{background:#e6f4ea;color:#2e7d32}
.tag.b1{background:#eaf1fe;color:#2b5fc7}.tag.b2{background:#e4ecfd;color:#3b4fd8}
.tag.c1{background:#f3e8fd;color:#7c3aed}.tag.c2{background:#fdeaf3;color:#c0268a}
.tag.lv{background:#fdf3e3;color:var(--amber)}
/* 今日任务 */
.task-item{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:#fff;transition:border-color .15s}
.task-item.done{border-color:#cfe8dc;background:var(--green-soft)}
.task-ico{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:19px;background:#f1f3f7;flex-shrink:0}
.task-item.done .task-ico{background:#d8efe3}
.task-body{flex:1}
.task-t{font-weight:600;font-size:14px}
.task-d{font-size:12px;color:var(--sub)}
.task-cta{font-size:12px;font-weight:600;color:var(--accent);white-space:nowrap}
.task-item.done .task-cta{color:var(--green)}
/* 打卡横幅 */
.hero{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;border-radius:18px;padding:26px 28px;margin-bottom:20px;position:relative;overflow:hidden}
.hero h2{font-size:22px;font-weight:700}
.hero p{opacity:.85;font-size:13px;margin-top:4px}
.hero .streak-big{font-size:42px;font-weight:800;margin-top:10px}
.hero .streak-big small{font-size:14px;font-weight:500;opacity:.8}
/* 词汇卡片 */
.wcard{perspective:1200px;max-width:520px;margin:0 auto;min-height:300px;cursor:pointer}
.wcard-inner{position:relative;width:100%;min-height:300px;transition:transform .45s;transform-style:preserve-3d}
.wcard.flipped .wcard-inner{transform:rotateY(180deg)}
.wface{position:absolute;inset:0;backface-visibility:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;text-align:center}
.wface.back{transform:rotateY(180deg);align-items:flex-start;text-align:left;justify-content:flex-start;overflow:auto}
.w-word{font-size:34px;font-weight:800}
.w-ipa{color:var(--sub);font-size:15px;margin-top:6px;font-family:Georgia,serif}
.w-pos{color:var(--accent);font-size:13px;margin-top:4px;font-weight:600}
.w-speak{position:absolute;top:14px;right:14px;background:#f1f3f7;border:none;width:36px;height:36px;border-radius:50%;font-size:16px;cursor:pointer}
.w-ex{margin-top:14px;text-align:left;width:100%}
.w-ex .en{font-size:14px;font-weight:600}
.w-ex .cn{font-size:12.5px;color:var(--sub);margin-top:2px}
.w-coll{margin-top:14px;font-size:12.5px;color:#5a6270;background:#f7f8fa;border-radius:8px;padding:8px 12px;width:100%}
.w-rate{display:flex;gap:10px;margin-top:20px;justify-content:center;flex-wrap:wrap}
.rate-btn{padding:12px 20px;border-radius:12px;border:none;font-size:14px;font-weight:700;cursor:pointer;transition:transform .1s}
.rate-btn:hover{transform:translateY(-2px)}
.rate-0{background:#fdeaea;color:var(--red)}
.rate-1{background:var(--amber-soft);color:var(--amber)}
.rate-2{background:var(--green-soft);color:var(--green)}
/* 语法 */
.topic-card{padding:16px 18px;border:1px solid var(--line);border-radius:12px;background:#fff;cursor:pointer;transition:border-color .15s,box-shadow .15s}
.topic-card:hover{border-color:#c9d8f5;box-shadow:var(--shadow)}
.topic-card .t{font-weight:700;font-size:14.5px}
.topic-card .d{font-size:12px;color:var(--sub);margin-top:3px}
.ex-question{font-size:15px;font-weight:600;margin-bottom:8px}
.ex-sent{font-size:16px;margin-bottom:12px;line-height:1.7}
.ex-opt{display:block;width:100%;text-align:left;padding:11px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;margin-bottom:8px;font-size:14px;cursor:pointer;transition:border-color .12s,background .12s}
.ex-opt:hover{border-color:var(--accent)}
.ex-opt.correct{border-color:var(--green);background:var(--green-soft)}
.ex-opt.wrong{border-color:var(--red);background:var(--red-soft)}
.ex-opt[disabled]{cursor:default}
.ex-expl{border-radius:10px;padding:12px 14px;font-size:13.5px;margin-top:10px;background:var(--accent-soft);color:#2b4a7d}
.ex-expl.wrong{background:var(--red-soft);color:#8c2f2f}
/* 口语 */
.pron-card{border:1px solid var(--line);border-radius:12px;padding:16px;background:#fff;margin-bottom:12px}
.pron-card .t{font-weight:700}
.pron-card .tip{font-size:13px;color:#4c5361;margin:8px 0}
.pron-card .demo{font-size:16px;font-weight:600;letter-spacing:.5px}
.line-item{border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:10px;background:#fff}
.line-item .en{font-size:16px;font-weight:600}
.line-item .cn{font-size:12.5px;color:var(--sub);margin-top:3px}
.line-item .focus{font-size:11px;color:var(--accent);margin-top:6px}
.line-item .ops{display:flex;gap:8px;margin-top:10px}
.rec-btn{width:38px;height:38px;border-radius:50%;border:none;font-size:15px;cursor:pointer;background:#f1f3f7}
.rec-btn.recording{background:var(--red);color:#fff;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.fb-bar{height:6px;background:#eef0f4;border-radius:99px;overflow:hidden;margin-top:8px}
.fb-bar i{display:block;height:100%;background:linear-gradient(90deg,#ef4444,#f59e0b,#22c55e)}
/* 进度 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
@media(max-width:900px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;text-align:center}
.stat-card .n{font-size:26px;font-weight:800;color:var(--accent)}
.stat-card .l{font-size:12px;color:var(--sub);margin-top:2px}
table.mini{width:100%;border-collapse:collapse;font-size:13px}
table.mini td,table.mini th{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left}
table.mini th{color:var(--sub);font-weight:600;font-size:12px}
/* 弹窗 */
.modal-mask{position:fixed;inset:0;background:rgba(15,20,30,.45);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px;backdrop-filter:blur(2px)}
.modal{background:#fff;border-radius:16px;max-width:480px;width:100%;padding:24px;max-height:84vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.modal h3{font-size:17px;margin-bottom:10px}
/* toast */
#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(80px);background:#23272e;color:#fff;padding:11px 22px;border-radius:99px;font-size:14px;z-index:99;transition:transform .3s;opacity:0;pointer-events:none}
#toast.show{transform:translateX(-50%) translateY(0);opacity:1}
/* 移动端 */
@media(max-width:760px){
  #app{flex-direction:column}
  #sidebar{position:fixed;bottom:0;top:auto;width:100%;height:62px;flex-direction:row;border-right:none;border-top:1px solid var(--line);z-index:40;background:#fff}
  .brand{display:none}
  #nav{display:flex;flex:1;padding:4px;justify-content:space-around}
  #nav a{flex-direction:column;gap:2px;padding:6px 4px;font-size:10px;border-radius:8px;margin:0}
  #nav .ico{font-size:19px;width:auto}
  .side-foot{display:none}
  #main{padding:18px 14px 90px}
  .hero{padding:20px}
}
/* 工具 */
.muted{color:var(--sub)}
.small{font-size:12.5px}
.center{text-align:center}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}
.hidden{display:none!important}

/* ===== 手敲单词 (移植 typewords) ===== */
.typing-settings{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:14px 0}
.typing-settings label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--sub)}
.typing-settings label.chk{flex-direction:row;align-items:center;gap:8px;margin-top:16px}
.typing-settings select,.typing-settings input[type=number]{padding:7px 9px;border:1px solid var(--line);border-radius:8px;font-size:14px;background:#fff}
.typing-settings input[type=checkbox]{width:17px;height:17px;accent-color:var(--accent)}
.tk-box{padding:26px 20px;text-align:center}
.tk-display{font-size:28px;letter-spacing:10px;color:var(--sub);margin:10px 0;min-height:34px;font-weight:700}
.tk-input-line{font-size:34px;letter-spacing:4px;min-height:46px;line-height:1.4;margin:6px 0}
.tk{display:inline-block;min-width:16px;transition:color .1s,transform .1s}
.tk.ok{color:#16a34a}
.tk.bad{color:#dc2626;transform:translateY(-2px)}
.tk-wrong{color:#dc2626;font-size:22px;margin-top:6px;letter-spacing:2px}
.tk-answer{margin-top:12px;font-size:22px;color:var(--accent);font-weight:700}
.tk-word-big{font-size:26px;font-weight:700;color:#111;margin:8px 0}
.tk-opts{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:16px}
.tk-opts .opt{padding:14px;font-size:17px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;transition:.15s;font-weight:600}
.tk-opts .opt:hover{border-color:var(--accent);color:var(--accent)}
.tk-opts .opt-correct{border-color:#16a34a;color:#16a34a;background:#f0fdf4}
.tk-opts .opt-wrong{border-color:#dc2626;color:#dc2626;background:#fef2f2}
.opt[disabled]{opacity:.7;cursor:default}