/* Kho game Baobaoxue: phần dùng chung cho mọi game (28/10/2026) */
:root{
  --red:#d9363e; --red-d:#c22a32; --teal:#2b8a86; --teal-d:#22746f; --gold:#f4b400;
  --ink:#1c1c24; --muted:#5b5f6b; --line:#eee4e2; --bg:#fff8f5; --card:#fff;
  --ok:#1f9d6b; --ok-soft:#e3f6ee; --bad:#e2484f; --bad-soft:#fdeaea;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Be Vietnam Pro",system-ui,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;line-height:1.5;min-height:100vh}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
.hz{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}

/* Thanh trên */
.top{background:var(--red);color:#fff;position:sticky;top:0;z-index:10;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.top .wrap{display:flex;align-items:center;gap:12px;height:60px}
.top .back{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.16)}
.top .back:hover{background:rgba(255,255,255,.26)}
.top h1{font-size:19px;font-weight:700;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top .mute{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.16);font-size:18px}

/* Đầu trang chọn bài */
.intro{display:flex;align-items:center;gap:18px;padding:22px 0 8px}
.intro img{width:84px;height:auto;flex:none}
.intro h2{font-size:26px;font-weight:800;line-height:1.2}
.intro p{color:var(--muted);font-size:15.5px;margin-top:4px}
.chips{display:flex;gap:8px;overflow-x:auto;padding:14px 0 6px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;padding:8px 16px;border-radius:999px;background:#fff;border:1.5px solid var(--line);font-weight:600;font-size:14.5px;color:#444}
.chip.on{background:var(--red);border-color:var(--red);color:#fff}
.sub-chips .chip{font-size:13.5px;padding:6px 13px}
.sub-chips .chip.on{background:var(--teal);border-color:var(--teal)}

.lessons{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;padding:12px 0 40px}
.ls{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:16px;text-align:left;transition:.15s}
.ls:hover{border-color:var(--red);transform:translateY(-2px);box-shadow:0 8px 20px rgba(217,54,62,.1)}
.ls .row{display:flex;align-items:center;gap:12px}
.ls .big{width:52px;height:52px;flex:none;border-radius:14px;background:#fff1ee;color:var(--red);display:grid;place-items:center;font-size:30px;font-weight:700}
.ls .tag{font-size:12px;font-weight:700;color:var(--teal);background:#e6f4f3;border-radius:6px;padding:2px 8px;align-self:flex-start}
.ls .t{font-weight:700;font-size:15.5px;line-height:1.35}
.ls .t .hz{font-weight:600}
.ls .vn{font-size:13.5px;color:var(--muted)}
.ls .meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-top:auto;padding-top:4px}
.ls .best{color:#b37b00;font-weight:600}
.ls .play{margin-left:auto;background:var(--red);color:#fff;font-weight:700;font-size:13.5px;padding:6px 14px;border-radius:999px}

/* Màn chơi */
.stage{padding-top:16px;padding-bottom:40px}
.hud{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.hud .lesson-name{font-weight:700;font-size:16px;flex:1;min-width:180px}
.pill{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:6px 13px;font-weight:700;font-size:14.5px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--red);color:#fff;font-weight:700;font-size:15px;padding:11px 20px;border-radius:12px;transition:.15s}
.btn:hover{background:var(--red-d)}
.btn.ghost{background:#fff;color:var(--red);border:1.5px solid var(--red)}
.btn.teal{background:var(--teal)}
.btn.teal:hover{background:var(--teal-d)}
.btn.sm{font-size:13.5px;padding:7px 13px;border-radius:10px}
.btn:disabled{opacity:.45;cursor:default}

/* Chọn chế độ */
.modes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:820px;margin:10px auto}
.mode{background:#fff;border:2px solid var(--line);border-radius:18px;padding:18px;text-align:left;display:flex;flex-direction:column;gap:6px;transition:.15s}
.mode:hover{border-color:var(--red)}
.mode b{font-size:18px}
.mode span{font-size:14px;color:var(--muted)}
.mode .lv{font-size:22px}
.center{text-align:center}
.pick-title{font-size:22px;font-weight:800;text-align:center;margin:8px 0 2px}
.pick-sub{color:var(--muted);text-align:center;margin-bottom:12px}

/* Hộp kết quả */
.modal{position:fixed;inset:0;background:rgba(20,20,30,.45);display:flex;z-index:50;padding:66px 16px 16px;overflow-y:auto}
.modal .box{margin:auto}
.modal[hidden]{display:none}
.box{background:#fff;border-radius:24px;padding:26px 22px 22px;max-width:420px;width:100%;text-align:center;animation:pop .35s ease}
.box img{width:96px;margin:-70px auto 6px}
.box h3{font-size:24px;font-weight:800}
.box .stars{font-size:38px;letter-spacing:4px;margin:6px 0;color:#ddd}
.box .stars .on{color:var(--gold)}
.box .stats{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:10px 0 16px}
.box .acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.box .newbest{color:var(--ok);font-weight:700;margin-bottom:6px}
@keyframes pop{from{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}

/* Bảng xếp hạng */
.lb{list-style:none;display:flex;flex-direction:column;gap:4px;text-align:left}
.lb li{display:flex;align-items:center;gap:8px;padding:6px 10px;border-radius:10px;background:#fff7f4;font-size:14px}
.lb li.me{background:#fff1c9;outline:2px solid var(--gold)}
.lb .rk{width:26px;text-align:center;font-weight:800;color:var(--muted)}
.lb .nm{flex:1;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lb .md{font-size:12px;color:var(--teal);font-weight:600}
.lb .tm{font-size:12.5px;color:var(--muted);width:40px;text-align:right}
.lb b{width:46px;text-align:right;color:var(--red)}
.lb-empty{color:var(--muted);font-size:14px;padding:8px 0}
.lb-box{background:#fff;border:1.5px solid var(--line);border-radius:18px;padding:14px 16px;max-width:820px;margin:16px auto 0}
.lb-box h4{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.box .lb-wrap{margin:0 0 16px;max-height:250px;overflow:auto}
.box .lb-wrap h4{font-size:15px;margin-bottom:6px}
.box .rank{font-weight:700;color:var(--teal);margin-bottom:8px}
.name-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;max-width:820px;margin:4px auto 14px;background:#fff;border:1.5px solid var(--line);border-radius:16px;padding:12px 14px}
.name-row label{font-weight:700;font-size:15px}
.name-row input{flex:1;min-width:180px;font:inherit;font-size:16px;padding:9px 12px;border:1.5px solid var(--line);border-radius:10px;outline:none}
.name-row input:focus{border-color:var(--red)}
.name-row small{width:100%;text-align:center;color:var(--muted);font-size:12.5px}

/* Báo nhỏ */
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(30px);background:#22252e;color:#fff;padding:11px 18px;border-radius:14px;font-weight:600;font-size:15px;opacity:0;transition:.25s;z-index:60;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.empty{padding:40px 0;text-align:center;color:var(--muted)}
.foot{text-align:center;color:var(--muted);font-size:13px;padding:10px 0 30px}
.foot a{color:var(--red);font-weight:600}

@media (max-width:700px){
  .intro img{width:64px}
  .intro h2{font-size:21px}
  .modes{grid-template-columns:1fr}
  .top h1{font-size:16px}
  .lessons{grid-template-columns:1fr}
}

/* Nhúng trong gói hoctap (?nhung=1): bỏ đường về kho game và chân trang */
.nhung .top .back,.nhung .foot{display:none}
.nhung .top{position:static}