@font-face{font-family:'YF Viet';src:url(phong/BeVietnamPro-Medium.ttf);font-display:swap}
:root{--muc:#14495A;--son:#B8322A;--dong:#C9A86A;--giay:#FFFDF7;--mau:#FF6F61;--chu:#22313A;--nhat:#EEF5F8;--xanh:#2FB36A;--do:#E5484D}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--giay);color:var(--chu);font-family:'YF Viet','Helvetica Neue',Arial,sans-serif;-webkit-text-size-adjust:100%}
body{min-height:100vh;padding-bottom:env(safe-area-inset-bottom)}
.han{font-family:'Kaiti SC','STKaiti','KaiTi','Songti SC','PingFang SC',serif}
button{font-family:inherit;cursor:pointer;border:0}
#app{max-width:560px;margin:0 auto;padding:0 14px 28px}

/* thanh đầu */
.dau{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:10px;padding:calc(10px + env(safe-area-inset-top)) 4px 10px;background:var(--giay)}
.dau .lui{width:40px;height:40px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(20,73,90,.15);font-size:22px;color:var(--muc);display:flex;align-items:center;justify-content:center}
.dau .ten{flex:1;min-width:0}
.dau .ten b{display:block;font-size:17px;color:var(--muc);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dau .ten span{font-size:12.5px;opacity:.75}
.dau .loa{width:40px;height:40px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgba(20,73,90,.15);font-size:19px}

/* trang đầu */
.bia{margin:6px 0 14px;padding:18px 16px 16px;border-radius:22px;background:linear-gradient(135deg,#14495A,#2B7A8F);color:#fff;position:relative;overflow:hidden}
.bia img{height:38px;background:#fff;border-radius:10px;padding:4px 8px}
.bia h1{margin:12px 0 4px;font-size:24px;line-height:1.25}
.bia h1 .han{font-size:28px;color:#FFD86B;margin-right:6px}
.bia p{margin:0;font-size:13.5px;opacity:.92;line-height:1.5}
.bia .tien{margin-top:12px;height:10px;border-radius:5px;background:rgba(255,255,255,.25);overflow:hidden}
.bia .tien i{display:block;height:100%;background:#FFD86B;border-radius:5px}
.bia .so{font-size:12.5px;margin-top:6px;opacity:.95}
.sach{display:flex;gap:8px;margin:0 0 12px}
.sach button{padding:8px 14px;border-radius:20px;background:#fff;color:var(--muc);font-weight:700;box-shadow:0 1px 4px rgba(0,0,0,.08)}
.sach button.on{background:var(--muc);color:#fff}
.sach button[disabled]{opacity:.45}
.luoi{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.the{background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 3px 12px rgba(20,73,90,.10);text-align:left;padding:0;color:inherit;display:flex;flex-direction:column}
.the .anh{aspect-ratio:5/4;background:#eee center/cover}
.the .noi{padding:9px 10px 11px;border-top:4px solid var(--m)}
.the .so{font-size:11.5px;color:var(--m);font-weight:700}
.the .t{font-size:15.5px;margin:2px 0;line-height:1.25}
.the .v{font-size:11.5px;opacity:.75;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.the .dem{margin-top:6px;font-size:11.5px;display:flex;justify-content:space-between;align-items:center}
.the .dem .thanh{flex:1;height:6px;border-radius:3px;background:#EEF1F3;margin-right:8px;overflow:hidden}
.the .dem .thanh i{display:block;height:100%;background:var(--m)}
.cai{margin:16px 0 0;padding:12px 14px;border-radius:16px;background:#FFF4D6;font-size:13px;line-height:1.55}
.cai b{color:var(--son)}
.chan{text-align:center;font-size:12px;opacity:.7;margin-top:18px;line-height:1.6}

/* trang bài */
.dauBai{border-radius:20px;overflow:hidden;background:#fff;box-shadow:0 3px 12px rgba(20,73,90,.10);margin-bottom:14px}
.dauBai .anh{aspect-ratio:16/9;background:#eee center/cover}
.dauBai .noi{padding:12px 14px;border-top:5px solid var(--m)}
.dauBai .t{font-size:21px;color:var(--muc)}
.dauBai .v{font-size:14px;margin-top:2px;font-weight:700}
.nhom{margin:14px 0 8px;font-size:14px;font-weight:700;color:var(--muc);display:flex;align-items:center;gap:8px}
.nhom:before{content:'';width:6px;height:18px;border-radius:3px;background:var(--m)}
.oChu{display:grid;grid-template-columns:repeat(auto-fill,minmax(68px,1fr));gap:9px}
.oChu button{background:#fff;border-radius:14px;padding:6px 2px 5px;box-shadow:0 2px 8px rgba(20,73,90,.10);color:inherit;position:relative}
.oChu .c{font-size:34px;line-height:1.15;color:var(--chu)}
.oChu .p{font-size:11.5px;color:var(--m);font-weight:700}
.oChu .s{font-size:10px;color:#F5B100;height:12px;letter-spacing:-1px}
.tuGhep{display:flex;flex-direction:column;gap:9px}
.tuGhep button{background:#fff;border-radius:14px;padding:10px 12px;box-shadow:0 2px 8px rgba(20,73,90,.10);color:inherit;display:flex;align-items:center;gap:12px;text-align:left}
.tuGhep .w{font-size:30px;color:var(--chu);white-space:nowrap}
.tuGhep .p{font-size:13px;color:var(--m);font-weight:700}
.tuGhep .n{font-size:13px;opacity:.85}
.tuGhep .s{margin-left:auto;font-size:12px;color:#F5B100;white-space:nowrap}
.nutLon{display:block;width:100%;margin:18px 0 0;padding:14px;border-radius:16px;background:var(--m);color:#fff;font-size:16px;font-weight:700;box-shadow:0 4px 14px rgba(0,0,0,.15)}

/* màn luyện */
.buoc{display:flex;background:#fff;border-radius:16px;padding:4px;box-shadow:0 2px 8px rgba(20,73,90,.10);margin-bottom:12px}
.buoc button{flex:1;padding:9px 4px;border-radius:12px;background:transparent;color:var(--muc);font-size:14px;font-weight:700}
.buoc button .han{font-size:17px;margin-right:3px}
.buoc button.on{background:var(--m);color:#fff}
.luyen{display:flex;gap:12px;align-items:flex-start}
.khung{position:relative;flex:0 0 auto;background:#fff;border-radius:16px;box-shadow:0 3px 12px rgba(20,73,90,.12);padding:6px}
.khung.rung{animation:rung .35s}
.khung.do{box-shadow:0 0 0 3px var(--do),0 3px 12px rgba(20,73,90,.12)}
.khung.xanh{box-shadow:0 0 0 3px var(--xanh),0 3px 12px rgba(20,73,90,.12)}
@keyframes rung{0%,100%{transform:translateX(0)}20%{transform:translateX(-7px)}40%{transform:translateX(7px)}60%{transform:translateX(-5px)}80%{transform:translateX(4px)}}
.oLuoi{position:relative}
.oLuoi svg.nen{position:absolute;inset:0;pointer-events:none}
.oLuoi .viet{position:relative;touch-action:none}
.tin{flex:1;min-width:0;background:#fff;border-radius:16px;padding:10px 11px;box-shadow:0 3px 12px rgba(20,73,90,.10);font-size:13px;line-height:1.45}
.tin .py{font-size:22px;font-weight:700;color:var(--m);line-height:1.15}
.tin .hv{font-size:13px;margin-bottom:6px}
.tin .hv b{color:var(--son)}
.tin .d{display:flex;justify-content:space-between;gap:6px;border-top:1px dashed #DDE6EA;padding:5px 0 0;margin-top:5px}
.tin .d span:first-child{opacity:.7}
.tin .d b{text-align:right}
.tin .bo{font-size:20px}
.giai{margin-top:12px;background:#fff;border-radius:16px;padding:12px 14px;box-shadow:0 3px 12px rgba(20,73,90,.10)}
.giai h3{margin:0 0 6px;font-size:14px;color:var(--muc)}
.giai .nghia{font-size:16px;font-weight:700;line-height:1.45}
.giai .tu{margin-top:8px;padding:8px 10px;border-radius:12px;background:var(--nhat);display:flex;align-items:center;gap:10px}
.giai .tu .w{font-size:26px}
.giai .tu .p{font-size:13px;color:var(--m);font-weight:700}
.giai .tu .n{font-size:13px}
.thuTu{margin-top:12px;background:#fff;border-radius:16px;padding:10px 12px;box-shadow:0 3px 12px rgba(20,73,90,.10)}
.thuTu h3{margin:0 0 6px;font-size:14px;color:var(--muc)}
.thuTu .day{display:flex;flex-wrap:wrap;gap:4px}
.thuTu svg{width:40px;height:40px;background:#FBFCFD;border:1px solid #E3EAEE;border-radius:6px}
.dk{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.dk button{flex:1;min-width:96px;padding:11px 8px;border-radius:14px;background:#fff;color:var(--muc);font-weight:700;font-size:14px;box-shadow:0 2px 8px rgba(20,73,90,.12)}
.dk button.chinh{background:var(--m);color:#fff}
.bao{min-height:24px;margin-top:10px;text-align:center;font-weight:700;font-size:15px}
.bao.dung{color:var(--xanh)}.bao.sai{color:var(--do)}
.sao{font-size:30px;letter-spacing:4px;text-align:center;color:#E3E7EA}
.sao .on{color:#F5B100;display:inline-block;animation:bat .5s both}
@keyframes bat{0%{transform:scale(0) rotate(-40deg)}70%{transform:scale(1.35)}100%{transform:scale(1)}}
.chuyen{display:flex;justify-content:space-between;margin-top:14px;gap:10px}
.chuyen button{flex:1;padding:12px;border-radius:14px;background:var(--nhat);color:var(--muc);font-weight:700}
.tuKhung{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.tuKhung .khung{padding:4px}
.tuKhung .khung.dang{box-shadow:0 0 0 3px var(--m),0 3px 12px rgba(20,73,90,.12)}
.tuTin{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;margin-top:12px}
.tuTin .tin .c{font-size:30px;float:right;line-height:1}

/* lời khen */
#phao{position:fixed;inset:0;pointer-events:none;z-index:50}
.khenNho{position:fixed;left:50%;top:38%;transform:translate(-50%,-50%);z-index:40;background:#fff;border-radius:22px;padding:16px 26px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.25);animation:noi .45s both}
.khenNho .cn{font-size:30px;color:var(--son);white-space:nowrap}
.khenNho .vi{font-size:15px;font-weight:700;margin-top:4px}
@keyframes noi{0%{transform:translate(-50%,-50%) scale(.4);opacity:0}70%{transform:translate(-50%,-50%) scale(1.08)}100%{transform:translate(-50%,-50%) scale(1);opacity:1}}
.manXong{position:fixed;inset:0;z-index:45;background:rgba(20,40,50,.55);display:flex;align-items:center;justify-content:center;padding:18px}
.manXong .hop{background:#fff;border-radius:24px;max-width:420px;width:100%;padding:18px 16px 16px;text-align:center;animation:noi2 .5s both;position:relative}
@keyframes noi2{0%{transform:scale(.5);opacity:0}100%{transform:scale(1);opacity:1}}
.manXong .nv{display:flex;justify-content:space-between;align-items:flex-end;height:150px;margin:-10px 0 4px}
.manXong .nv img{height:150px;max-width:44%;object-fit:contain}
.manXong .cn{font-size:34px;color:var(--son)}
.manXong .vi{font-size:16px;font-weight:700}
.manXong .cau{margin-top:12px;padding:10px 12px;border-radius:14px;background:#FFF7E3;border-left:4px solid var(--m);text-align:left}
.manXong .cau .c1{font-size:19px;color:var(--muc)}
.manXong .cau .c2{font-size:12.5px;color:#2F80ED}
.manXong .cau .c3{font-size:13px;margin-top:2px}
.manXong .nutLon{margin-top:14px}
.phaoGiay{position:absolute;width:10px;height:14px;border-radius:2px;animation:roi 1.8s ease-in forwards}
@keyframes roi{0%{transform:translateY(-20px) rotate(0)}100%{transform:translateY(105vh) rotate(720deg);opacity:.7}}

@media (max-width:380px){.oChu{grid-template-columns:repeat(auto-fill,minmax(60px,1fr))}.tin{font-size:12.5px;padding:8px 9px}.tin .py{font-size:19px}}