:root{--bg: #f6f7fb;--card: #ffffff;--ink: #1e293b;--muted: #64748b;--line: #e5e7eb;--blue: #2563eb;--blue-soft: #eff6ff;--green: #16a34a;--green-soft: #f0fdf4;--red: #dc2626;--red-soft: #fef2f2;--amber-soft: #fffbeb;--violet: #7c3aed;--r: 16px;font-family:Be Vietnam Pro,Segoe UI,system-ui,-apple-system,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}h1,h2,h3{margin:0;line-height:1.25}.ipa{font-family:Charis SIL,Doulos SIL,Gentium Plus,Lucida Sans Unicode,Arial Unicode MS,Segoe UI,sans-serif;display:inline-block;padding:0 7px;margin:0 1px;border-radius:7px;background:var(--blue-soft);color:#1d4ed8;font-weight:500;white-space:nowrap}.ipa:before{content:"[";opacity:.45}.ipa:after{content:"]";opacity:.45}.ipa.xl{font-size:28px;padding:4px 14px;border-radius:12px}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;border-radius:12px;font-weight:600;font-size:15px;transition:.15s;white-space:nowrap}.btn.primary{background:var(--blue);color:#fff;box-shadow:0 4px 14px #2563eb40}.btn.primary:hover{background:#1d4ed8}.btn.soft{background:#eef2f7;color:var(--ink)}.btn.soft:hover{background:#e2e8f0}.btn:disabled{opacity:.4;cursor:default}.btn.lg{padding:14px 24px;font-size:17px}.icon-btn{width:40px;height:40px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;color:var(--muted);background:#f1f5f9;flex:none}.icon-btn:hover{color:var(--ink)}.icon-btn.active{background:var(--blue);color:#fff}.icon-btn.rec-on{background:var(--red);color:#fff;animation:pulse 1s infinite}@keyframes pulse{50%{box-shadow:0 0 0 6px #dc262633}}.link{color:var(--blue);font-weight:600;text-decoration:underline}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px}.card h3{display:flex;align-items:center;gap:8px;font-size:17px;margin-bottom:10px}.home{max-width:1040px;margin:0 auto;padding:20px 16px 40px}.hero{text-align:center;padding:36px 12px 28px}.hero-tag{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:99px;font-size:14px;color:var(--muted)}.hero h1{font-size:clamp(30px,6vw,46px);margin:16px 0 10px}.hero h1 span{color:var(--blue)}.hero p{max-width:620px;margin:0 auto 20px;color:var(--muted);font-size:17px;line-height:1.6}.hero-progress{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:20px;color:var(--muted);font-size:14px}.bar{width:200px;height:8px;background:#e2e8f0;border-radius:9px;overflow:hidden}.bar>div{height:100%;background:var(--green);border-radius:9px}.how{margin-bottom:26px}.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.how-grid div{background:#f8fafc;border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:4px;font-size:14px;line-height:1.5}.how-grid span{color:var(--muted)}.sec{margin-top:26px}.sec h2{font-size:22px}.sec-note{color:var(--muted);margin:4px 0 14px}.days{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}.day-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;display:flex;flex-direction:column;gap:6px;transition:.15s}.day-card:hover{border-color:#93c5fd;box-shadow:0 6px 20px #0f172a12;transform:translateY(-2px)}.day-card.is-done{background:var(--green-soft);border-color:#bbf7d0}.dc-top{display:flex;justify-content:space-between;align-items:center}.dc-num{font-size:13px;font-weight:700;color:var(--blue);text-transform:uppercase;letter-spacing:.04em}.dc-time{font-size:12px;color:var(--muted);display:inline-flex;gap:3px;align-items:center}.dc-ok{color:var(--green)}.dc-title{font-weight:700;font-size:17px}.dc-sub{color:var(--muted);font-size:14px;line-height:1.45}.dc-sounds{display:flex;flex-wrap:wrap;gap:4px;margin-top:2px;font-size:14px}.foot{text-align:center;color:var(--muted);font-size:13px;margin-top:40px}.lesson{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:5;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line)}.tb-title{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.25}.tb-title b{font-size:13px;color:var(--blue)}.tb-title span{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rec{display:flex;gap:6px}.progress{display:flex;gap:3px;padding:8px 12px 0;max-width:1000px;width:100%;margin:0 auto}.seg{flex:1;height:6px;border-radius:4px;background:#e2e8f0;padding:0}.seg.past{background:#93c5fd}.seg.cur{background:var(--blue)}.stage{flex:1;width:100%;max-width:1000px;margin:0 auto;padding:14px 12px 100px}.fade{animation:fade .25s ease}@keyframes fade{0%{opacity:0;transform:translateY(6px)}}.navbar{position:fixed;bottom:0;left:0;right:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line)}.navbar .count{color:var(--muted);font-size:14px}.slide{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:clamp(16px,3.5vw,32px);box-shadow:0 6px 24px #0f172a0a}.s-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}.s-head h2{flex:1;min-width:220px;font-size:clamp(21px,3.4vw,28px)}.mins{display:inline-flex;gap:4px;align-items:center;font-size:13px;color:var(--muted);background:#f1f5f9;padding:4px 9px;border-radius:99px}.score{display:inline-flex;gap:5px;align-items:center;font-weight:700;color:var(--green);background:var(--green-soft);padding:6px 12px;border-radius:99px}.para{font-size:17px;line-height:1.7;margin:0 0 12px}.bullets{padding-left:22px;margin:6px 0 12px}.bullets li{font-size:16.5px;line-height:1.65;margin-bottom:6px}.sub{font-size:15px;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.04em;margin:0 0 8px}.box{display:flex;gap:10px;align-items:flex-start;padding:13px 15px;border-radius:14px;margin-top:12px;font-size:16px;line-height:1.6}.box>svg{flex:none;margin-top:2px}.box.tip{background:var(--amber-soft);border:1px solid #fde68a}.box.tip>svg{color:#d97706}.box.warn{background:var(--red-soft);border:1px solid #fecaca}.box.warn>svg{color:var(--red)}.box.vn{background:#f5f3ff;border:1px solid #ddd6fe}.flag{font-size:18px}.cover{text-align:center}.cover-day{display:inline-block;background:var(--blue-soft);color:var(--blue);font-weight:700;padding:6px 14px;border-radius:99px;font-size:14px}.cover h1{font-size:clamp(28px,5vw,40px);margin:14px 0 8px}.lead{color:var(--muted);font-size:18px;margin:0 0 16px}.sound-row{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:20px}.cover-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;text-align:left}.checks{list-style:none;padding:0;margin:0}.checks li{position:relative;padding-left:28px;margin-bottom:9px;line-height:1.55;font-size:16px}.checks li:before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--green-soft);color:var(--green);font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center}.plan{list-style:none;padding:0;margin:0}.plan li{display:flex;gap:10px;align-items:baseline;padding:7px 0;border-bottom:1px dashed var(--line);font-size:15.5px}.plan li:last-child{border:0}.pmin{flex:none;width:44px;text-align:center;background:var(--blue-soft);color:var(--blue);font-weight:700;border-radius:8px;padding:2px 0;font-size:14px}.hw{background:#fafaff}.done-msg{margin:18px 0 14px;padding:14px;text-align:center;background:var(--green-soft);border-radius:14px;font-weight:600;color:#166534}.mouth-grid{display:grid;grid-template-columns:minmax(260px,1fr) 1.2fr;gap:18px;align-items:start}@media(max-width:760px){.mouth-grid{grid-template-columns:1fr}}.center{text-align:center}.big-sound{font-family:Charis SIL,Doulos SIL,Lucida Sans Unicode,Segoe UI,sans-serif;font-size:46px;font-weight:700;color:var(--blue)}.mouth-svg,.vowel-svg{width:100%;max-width:330px;height:auto;display:block;margin:0 auto}.svg-lbl{font-size:10px;fill:#64748b}.svg-lbl.dark{fill:#7f1d1d;font-weight:600}.dot-pulse{fill:#2563eb33;animation:dot 1.4s infinite;transform-box:fill-box;transform-origin:center}@keyframes dot{50%{transform:scale(1.6);opacity:.3}}.place-name{font-weight:700;margin:6px 0 10px}.badges{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.badge{font-size:13.5px;padding:5px 10px;border-radius:99px;font-weight:600}.badge.info{background:#f1f5f9;color:#334155}.badge.yes{background:#ede9fe;color:#5b21b6}.badge.no{background:#ecfeff;color:#0e7490}.lips{display:inline-flex;align-items:center;gap:4px;font-size:13.5px;font-weight:600;background:#fff1f2;color:#9f1239;padding:2px 10px 2px 4px;border-radius:99px}.steps{padding-left:0;list-style:none;counter-reset:st;margin:0 0 8px}.steps li{counter-increment:st;position:relative;padding:8px 0 8px 40px;font-size:16.5px;line-height:1.6}.steps li:before{content:counter(st);position:absolute;left:0;top:8px;width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px}.example{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:20px}.say{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-width:34px;height:34px;padding:0 8px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-weight:600;font-size:14px;flex:none;vertical-align:middle;margin-left:6px}.say.big{width:46px;height:46px;border-radius:50%;background:var(--blue);color:#fff;margin:0}.say.on,.say:hover{background:var(--blue);color:#fff}.cmp{display:flex;flex-direction:column;gap:10px}.cmp-row{display:grid;grid-template-columns:170px 1fr 1.3fr;gap:10px;align-items:center;border:1px solid var(--line);border-radius:14px;padding:10px 12px}@media(max-width:760px){.cmp-row{grid-template-columns:1fr;gap:6px}}.cmp-w{display:flex;align-items:center;gap:8px;font-size:18px}.cmp-w .say{margin:0}.cmp-bad,.cmp-good{display:flex;gap:6px;align-items:flex-start;font-size:15.5px;line-height:1.5;padding:7px 10px;border-radius:10px}.cmp-bad{background:var(--red-soft);color:#991b1b}.cmp-good{background:var(--green-soft);color:#166534}.cmp-bad svg,.cmp-good svg{flex:none;margin-top:3px}.words{display:grid;grid-template-columns:repeat(auto-fill,minmax(165px,1fr));gap:10px}.word,.pw{text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:5px;transition:.12s}.word:hover,.pw:hover{border-color:var(--blue);background:#f8fbff}.word:active,.pw:active{transform:scale(.97)}.w-top{display:flex;align-items:center;gap:6px;font-size:19px;min-width:0;overflow-wrap:anywhere}.word,.pw{min-width:0}.word .ipa,.pw .ipa,.note{max-width:100%;overflow-wrap:anywhere}.w-ico{color:var(--blue);flex:none}.word .ipa,.pw .ipa{align-self:flex-start;font-size:15px}.vi{color:var(--muted);font-size:14.5px}.note{font-size:13.5px;color:#92400e;background:var(--amber-soft);padding:4px 8px;border-radius:8px;line-height:1.45}.uk{font-size:10px;background:#fee2e2;color:#b91c1c;padding:1px 5px;border-radius:5px;font-weight:700}.hint{color:var(--muted);font-size:13.5px;text-align:center;margin:14px 0 0}.pairs{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}.pair{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px;background:#f8fafc;padding:8px;border-radius:16px}.vs{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:11px;font-weight:800;color:var(--muted)}.sents{display:flex;flex-direction:column;gap:10px}.sent{display:flex;gap:10px;align-items:flex-start;border:1.5px solid var(--line);border-radius:14px;padding:12px;cursor:pointer}.sent:hover{border-color:var(--blue)}.sent .say{margin:0}.sent .en{font-size:18.5px;font-weight:600;line-height:1.45}.sent .vi{margin-top:3px}.sent .note{margin-top:6px;display:inline-block}.timer{display:flex;align-items:center;gap:10px;background:var(--blue-soft);border-radius:14px;padding:10px 14px;margin-bottom:12px;color:var(--blue);flex-wrap:wrap}.timer.done{background:var(--green-soft);color:var(--green)}.tnum{font-size:28px;font-weight:800;font-variant-numeric:tabular-nums;margin-right:auto}.say-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}.say-row .sub{margin:0 4px 0 0}.chip-say{display:inline-flex;align-items:center;gap:5px;background:var(--blue-soft);color:#1d4ed8;padding:8px 12px;border-radius:99px;font-weight:600;font-size:15px}.chip-say:hover{background:var(--blue);color:#fff}.quiz{display:flex;flex-direction:column;gap:14px}.q{border:1px solid var(--line);border-radius:14px;padding:14px}.q-text{font-size:17px;font-weight:600;line-height:1.55;margin-bottom:10px}.qn{display:inline-flex;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;align-items:center;justify-content:center;margin-right:8px}.opts{display:flex;flex-wrap:wrap;gap:8px}.opt{border:1.5px solid var(--line);background:#fff;padding:9px 14px;border-radius:12px;font-size:15.5px;text-align:left}.opt:hover:not(:disabled){border-color:var(--blue);background:var(--blue-soft)}.opt.right{background:var(--green-soft);border-color:var(--green);color:#166534;font-weight:700}.opt.wrong{background:var(--red-soft);border-color:var(--red);color:#991b1b}.opt.dim{opacity:.5}.opt:disabled{cursor:default}.explain{margin-top:10px;padding:9px 12px;border-radius:10px;font-size:15px;line-height:1.55}.explain.ok{background:var(--green-soft)}.explain.no{background:var(--red-soft)}@media(max-width:520px){.stage{padding:10px 8px 96px}.slide{border-radius:16px}.para{font-size:16px}.words{grid-template-columns:repeat(2,minmax(0,1fr))}.w-top{font-size:17px}.pairs{grid-template-columns:1fr}.navbar .btn{padding:10px 12px}}