/* ====== Tiếng Anh 6 — giao diện THCS (gọn, hiện đại) ====== */
:root{
  --bg:#eef2f9; --card:#ffffff; --ink:#1f2a44; --muted:#6b7793;
  --brand:#3b5bdb; --brand-d:#2942b8; --teal:#0ea5a5; --teal-d:#0b7e7e;
  --green:#16a34a; --red:#dc2626; --amber:#d97706;
  --line:#e3e8f2; --shadow:0 6px 20px rgba(31,42,68,.08);
  --r:16px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:'Baloo 2',system-ui,'Segoe UI',sans-serif;
  background:linear-gradient(180deg,#eaf1ff 0%,#eef2f9 30%,#f4f6fb 100%);
  color:var(--ink); min-height:100vh;
  -webkit-tap-highlight-color:transparent;
}
#app{max-width:680px;margin:0 auto;padding:14px 14px 60px}
#fx{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}

/* ---- Top bar ---- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:linear-gradient(135deg,var(--brand),var(--teal));color:#fff;
  padding:16px 18px;border-radius:var(--r);box-shadow:var(--shadow);margin-bottom:14px}
.kw{font-size:26px;font-weight:800;line-height:1}
.sub{font-size:13px;opacity:.92;margin-top:2px}
.pts{background:rgba(255,255,255,.22);padding:8px 14px;border-radius:999px;font-weight:800;white-space:nowrap}

/* ---- Voice picker ---- */
.voice-pick{display:flex;gap:8px;justify-content:center;margin:4px 0 14px}
.vbtn{border:2px solid var(--line);background:#fff;color:var(--muted);font-family:inherit;
  font-size:15px;font-weight:700;padding:8px 16px;border-radius:999px;cursor:pointer}
.vbtn.on{border-color:var(--brand);color:var(--brand);background:#eef2ff}

/* ---- Unit grid ---- */
.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.unit-card{background:var(--card);border-radius:var(--r);padding:16px 14px;text-align:center;
  box-shadow:var(--shadow);cursor:pointer;border:1px solid var(--line);transition:.15s}
.unit-card:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(31,42,68,.14)}
.uc-emoji{font-size:40px;line-height:1}
.uc-no{font-size:12px;font-weight:800;color:var(--teal-d);letter-spacing:1px;margin-top:6px}
.uc-title{font-weight:800;font-size:17px;margin-top:2px}
.uc-vi{font-size:13px;color:var(--muted)}
.uc-prog{margin-top:8px;font-size:13px;color:var(--brand);font-weight:700}
.soon{text-align:center;color:var(--muted);font-size:13px;margin-top:18px;line-height:1.5}

/* ---- Stage header ---- */
.stage-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.back{border:none;background:#fff;border:1px solid var(--line);color:var(--brand);
  font-family:inherit;font-weight:700;font-size:14px;padding:8px 12px;border-radius:999px;cursor:pointer;white-space:nowrap}
.stage-title{font-weight:800;font-size:18px}

/* ---- Unit menu ---- */
.unit-intro{background:#fff;border:1px solid var(--line);border-left:5px solid var(--teal);
  border-radius:12px;padding:12px 14px;font-size:14px;color:var(--ink);margin-bottom:14px;line-height:1.5}
.ui-emoji{font-size:20px;margin-right:6px}
.act-list{display:flex;flex-direction:column;gap:10px}
.act-row{display:flex;align-items:center;gap:14px;width:100%;text-align:left;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;cursor:pointer;font-family:inherit;transition:.12s}
.act-row:hover{border-color:var(--brand);transform:translateX(2px)}
.act-row.done{background:#f0fdf4;border-color:#bbf7d0}
.ar-emoji{font-size:28px}
.ar-text{flex:1}
.ar-text b{font-size:17px;display:block}
.ar-text small{color:var(--muted);font-size:13px}
.ar-mark{font-size:22px;color:var(--brand);font-weight:800}
.act-row.done .ar-mark{color:var(--green)}

/* ---- Progress dots ---- */
.progress-dots{display:flex;gap:6px;justify-content:center;margin:0 0 14px}
.progress-dots span{width:9px;height:9px;border-radius:50%;background:#d4dbea}
.progress-dots span.on{background:var(--green)}
.progress-dots span.cur{background:var(--brand);transform:scale(1.25)}

/* ---- Buttons ---- */
.btn{display:inline-block;border:none;background:var(--brand);color:#fff;font-family:inherit;
  font-weight:800;font-size:16px;padding:12px 22px;border-radius:999px;cursor:pointer;box-shadow:var(--shadow)}
.btn:hover{background:var(--brand-d)}
.btn.big{display:block;width:100%;margin:16px auto 0;font-size:17px;padding:14px}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--line);box-shadow:none}
.nav-row{display:flex;gap:10px;justify-content:center;margin-top:18px}
.spk{border:none;background:#eef2ff;color:var(--brand);font-family:inherit;font-weight:700;
  font-size:14px;padding:9px 14px;border-radius:999px;cursor:pointer}
.spk:hover{background:#e0e7ff}
.spk.big{font-size:16px;padding:11px 20px;margin-top:10px}

/* ---- Vocab ---- */
.vocab-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 18px;text-align:center;box-shadow:var(--shadow)}
.vc-word{font-size:34px;font-weight:800;color:var(--brand-d)}
.vc-ipa{font-size:18px;color:var(--teal-d);margin-top:2px}
.vc-vi{font-size:17px;color:var(--ink);margin-top:4px}
.vc-row{display:flex;gap:8px;justify-content:center;align-items:center;flex-wrap:wrap;margin-top:12px}
.vc-ex{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line)}
.ex-en{font-size:17px;color:var(--ink);font-weight:600}
.ex-vi{font-size:14px;color:var(--muted);margin-top:2px}

/* ---- Mic ---- */
.mic-wrap{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
.mic-btn{border:none;background:#fff0f3;color:#e11d63;font-family:inherit;font-weight:700;
  font-size:14px;padding:9px 14px;border-radius:999px;cursor:pointer}
.mic-btn.listening,.mic-btn:hover{background:#ffe0ea}
.mic-btn:disabled{opacity:.6;cursor:default}
.mic-res{font-size:14px;font-weight:700;color:var(--muted)}
.mic-res.ok{color:var(--green)} .mic-res.mid{color:var(--amber)} .mic-res.low{color:var(--red)}

/* ---- Pron / options ---- */
.pron-hint{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:10px 14px;font-size:13px;color:#92400e;margin-bottom:14px;line-height:1.5}
.pron-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;text-align:center;box-shadow:var(--shadow)}
.pron-word{font-size:38px;font-weight:800;color:var(--brand-d)}
.ask{text-align:center;font-weight:700;font-size:16px;margin:16px 0 10px}
.opt-row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.opt-row.col{flex-direction:column}
.opt{border:2px solid var(--line);background:#fff;color:var(--ink);font-family:inherit;
  font-weight:700;font-size:16px;padding:13px 18px;border-radius:14px;cursor:pointer;text-align:left}
.opt:hover:not(:disabled){border-color:var(--brand)}
.opt.sound{font-size:22px;min-width:110px;text-align:center;color:var(--teal-d)}
.opt.right{border-color:var(--green);background:#f0fdf4;color:var(--green)}
.opt.wrong{border-color:var(--red);background:#fef2f2;color:var(--red)}
.opt:disabled{cursor:default}
.feedback{text-align:center;font-weight:700;margin-top:14px}
.feedback.good{color:var(--green)} .feedback.bad{color:var(--red)}

/* ---- MCQ ---- */
.mcq-top{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:12px;font-size:14px;line-height:1.5}
.q-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow);margin-bottom:14px}
.q-no{font-size:12px;font-weight:800;color:var(--teal-d);letter-spacing:.5px}
.q-text{font-size:19px;font-weight:700;margin-top:4px;line-height:1.4}
.q-card .spk{margin-top:10px}
.explain{background:#eff6ff;border:1px solid #bfdbfe;border-radius:12px;padding:10px 14px;
  font-size:14px;color:#1e40af;margin-top:14px;line-height:1.5}

/* ---- Grammar note ---- */
.note-box{background:#fff;border:1px solid var(--line);border-top:5px solid var(--brand);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow)}
.nb-title{font-size:18px;font-weight:800;color:var(--brand-d)}
.nb-en{font-size:14px;color:var(--muted);font-weight:600}
.nb-note{margin-top:8px;font-size:15px;line-height:1.6}
.nb-ex{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:10px}
.ex-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ex-line .ex-en{flex:1;min-width:160px}
.ex-line .ex-vi{flex-basis:100%;margin-top:-4px}
.result-mini{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow)}
.rm-score{font-size:40px;font-weight:800;color:var(--brand)}

/* ---- Reading / Listening ---- */
.read-intro{background:#f0fdfa;border:1px solid #99f6e4;border-radius:12px;padding:11px 14px;font-size:14px;color:var(--teal-d);margin-bottom:14px;line-height:1.5}
.passage{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-bottom:12px;box-shadow:var(--shadow)}
.ps-name{font-weight:800;font-size:18px;color:var(--brand-d)}
.ps-text{margin:8px 0 10px;font-size:15px;line-height:1.6}
.player{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow);margin-bottom:6px}
.btn.play{max-width:260px}
.play-hint{font-size:13px;color:var(--muted);margin-top:10px}

/* ---- Result big ---- */
.result-big{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 20px;box-shadow:var(--shadow)}
.rb-face{font-size:54px;line-height:1}
.rb-score{font-size:44px;font-weight:800;color:var(--brand);margin-top:4px}
.rb-msg{font-size:19px;font-weight:700;margin-top:6px}
.rb-pts{font-size:15px;color:var(--amber);font-weight:800;margin-top:6px}

/* ---- Confetti ---- */
.confetti{position:absolute;font-size:22px;animation:fall linear forwards;will-change:transform}
@keyframes fall{to{transform:translateY(104vh) rotate(360deg);opacity:.2}}

/* ====== Cấu trúc theo sách: mục lục + bài tập ====== */
.unit-vi{color:var(--muted);font-size:14px;margin:-6px 0 12px 4px}
.block-step{text-align:center;font-size:12px;font-weight:800;color:var(--teal-d);letter-spacing:.5px;margin-bottom:8px}
.sub-label{display:inline-block;background:var(--teal);color:#fff;font-weight:800;font-size:13px;padding:3px 12px;border-radius:999px;margin-bottom:8px}
.instr{background:#fff;border:1px solid var(--line);border-left:5px solid var(--brand);border-radius:12px;padding:11px 14px;font-size:15px;line-height:1.5;margin-bottom:14px}
.instr b{color:var(--brand-d)}
.act-text small,.ar-text small{color:var(--muted)}

/* câu hỏi */
.big-word{font-size:34px;font-weight:800;color:var(--brand-d);text-align:center;margin:6px 0}
.q-label{color:var(--muted);font-weight:600;font-size:14px}
.gap{display:inline-block;min-width:64px;border-bottom:3px solid var(--brand);color:transparent;margin:0 4px;letter-spacing:2px}

/* hội thoại */
.dlg-title{text-align:center;font-size:17px;margin-bottom:10px}
.dlg-stage{color:var(--muted);font-size:13px;font-style:italic}
.btn.play{display:block;margin:0 auto 14px;max-width:240px}
.dlg-box{display:flex;flex-direction:column;gap:10px}
.dlg-line{display:flex;flex-direction:column;max-width:85%}
.dlg-line.right{align-self:flex-end;align-items:flex-end}
.dlg-who{font-size:12px;font-weight:800;color:var(--muted);margin:0 8px 2px}
.dlg-bubble{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 14px;box-shadow:var(--shadow)}
.dlg-line.right .dlg-bubble{background:#eef2ff;border-color:#c7d2fe}
.dlg-line.active .dlg-bubble{outline:3px solid var(--brand);outline-offset:1px}
.dlg-en{font-weight:600;font-size:16px}
.dlg-vi{font-size:13px;color:var(--muted);margin-top:2px}
.spk.mini{padding:3px 9px;font-size:12px;margin-top:6px}

/* ghi chú mềm / mở */
.soft-note{background:#fffbeb;border:1px solid #fde68a;border-radius:12px;padding:10px 14px;font-size:13px;color:#92400e;margin-bottom:12px;line-height:1.5}
.open-note{background:#f0fdfa;border:1px solid #99f6e4;border-radius:12px;padding:14px 16px;font-size:15px;color:var(--teal-d);line-height:1.6}

/* danh sách từ */
.word-list{display:flex;flex-direction:column;gap:10px}
.word-row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;box-shadow:var(--shadow)}
.wr-main{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.wr-w{font-size:20px;font-weight:800;color:var(--brand-d)}
.wr-ipa{font-size:15px;color:var(--teal-d)}
.wr-vi{font-size:14px;color:var(--muted);margin-top:2px}
.wr-tools{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px}

/* cột phát âm */
.pron-cols{display:flex;gap:12px}
.pron-col{flex:1;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow)}
.pc-head{text-align:center;font-size:22px;font-weight:800;color:var(--teal-d);margin-bottom:8px}
.pc-word{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:6px 0;border-top:1px dashed var(--line)}
.pc-word:first-of-type{border-top:none}
.pcw-t{font-weight:700;flex:1;min-width:70px}
.pc-word .mic-btn{font-size:12px;padding:6px 10px}

/* bài mẫu */
.model-lines{display:flex;flex-direction:column;gap:10px}
.ml-row{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;box-shadow:var(--shadow)}
.ml-en{font-weight:600;font-size:16px}
.ml-vi{font-size:13px;color:var(--muted);margin-top:2px}
.ml-tools{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.model-para{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow)}
.mp-text{font-size:16px;line-height:1.7}
.mp-tools{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}

/* nghe: đoán */
.guess-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:12px}
.gb-title{font-weight:800;color:var(--brand-d);margin-bottom:6px}
.gb-q{font-size:14px;color:var(--ink);line-height:1.6}

/* ---- Ảnh cắt thật từ sách ---- */
.ex-img{margin:2px 0 14px;text-align:center}
.ex-img img{max-width:100%;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.ex-cap{font-size:12px;color:var(--muted);margin-top:5px}

@media (max-width:420px){
  .big-word{font-size:28px} .q-text{font-size:17px} .kw{font-size:22px}
  .pron-cols{gap:8px} .pron-col{padding:8px}
}