@font-face{font-family:'CP';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/cp-600-vi.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}@font-face{font-family:'CP';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/cp-600-la.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}@font-face{font-family:'CP';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/cp-700-vi.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}@font-face{font-family:'CP';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/cp-700-la.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}@font-face{font-family:'IP';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ip-400-vi.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}@font-face{font-family:'IP';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/ip-400-la.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}@font-face{font-family:'IP';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/ip-600-vi.woff2) format('woff2');unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}@font-face{font-family:'IP';font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/ip-600-la.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
:root{--bg:#f5f5fb;--paper:#fff;--ink:#16163a;--mute:#55557a;--line:#e1e1f0;--ind:#4f46e5;--ind-d:#3730a3;--ind-l:#ecebff;--gold:#f59e0b;--win:#16a34a;--max:1200px;--g:20px;--head:'CP',system-ui,sans-serif;--ff:'IP',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:70px;overflow-x:clip}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--ff);overflow-x:clip}
a{color:var(--ind-d);text-underline-offset:3px}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:6px}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3{font-family:var(--head);font-weight:700;line-height:1.12;margin:0 0 .5em}
h2{font-size:clamp(25px,3.2vw,34px)}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;z-index:99;background:#fff;padding:8px 14px}.skip:focus{left:8px}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--g)}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;background:var(--ind);color:#fff;font-weight:600;border-radius:10px;padding:0 18px;min-height:46px;text-decoration:none}
.btn:hover{background:var(--ind-d);color:#fff}
.btn--line{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn--line:hover{background:var(--ind-l);color:var(--ink)}
.btn--sm{min-height:40px;font-size:15px}
.linkbtn{border:0;background:none;color:var(--ind-d);font-weight:600;text-decoration:underline;padding:8px 0;margin-top:6px}
.hd{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.hd__in{display:flex;align-items:center;gap:18px;min-height:58px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 19px var(--head)}
.brand__mk{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--ind);color:#fff;font:700 14px var(--head);transform:skewX(-8deg)}
.hd__nav{margin-left:auto}
.hd__nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.hd__nav a{display:block;padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--mute);font-weight:600;font-size:15px}
.hd__nav a:hover{background:var(--ind-l);color:var(--ind-d)}
.hd__btn{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;position:relative}
.hd__btn span:first-child,.hd__btn span:first-child::before,.hd__btn span:first-child::after{position:absolute;left:12px;right:12px;height:2px;background:var(--ink);content:''}
.hd__btn span:first-child{top:21px}.hd__btn span:first-child::before{top:-6px;left:0;right:0}.hd__btn span:first-child::after{top:6px;left:0;right:0}
.arena{padding:36px 0 6px;background:linear-gradient(120deg,#fff 0,var(--ind-l) 100%)}
.arena__h{font-size:clamp(32px,4.8vw,54px)}
.arena__h span{display:block;color:var(--ind)}
.arena__p{color:var(--mute);max-width:700px;margin:0 0 20px}
.sec{padding-top:26px;padding-bottom:10px}
.maker{display:grid;grid-template-columns:300px minmax(0,1fr);gap:20px;align-items:start}
.maker__side{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;position:sticky;top:74px}
.maker__lbl{display:block;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--mute);margin:10px 0 6px}
.maker__lbl:first-child{margin-top:0}
.maker__in{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--bg)}
.maker__in:focus{outline:none;border-color:var(--ind)}
textarea.maker__in{resize:vertical;line-height:1.6}
.maker__mode{display:flex;background:var(--bg);border-radius:10px;padding:3px;margin:12px 0}
.maker__mode button{flex:1;border:0;background:none;border-radius:8px;min-height:40px;font-weight:600;font-size:14px;color:var(--mute)}
.maker__mode [aria-checked=true]{background:#fff;color:var(--ind-d);box-shadow:0 1px 3px rgba(0,0,0,.1)}
.maker__acts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.maker__main{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;min-width:0}
.maker__title{font-size:26px;margin-bottom:2px}
.maker__hint{color:var(--mute);font-size:14px;margin:0 0 14px}
.bracket{display:flex;gap:26px;overflow-x:auto;padding-bottom:10px}
.col{flex:none;width:190px;display:flex;flex-direction:column}.col__m{flex:1;display:flex;flex-direction:column;justify-content:space-around;gap:14px}
.col__h{margin:0 0 4px;font:700 13px var(--head);text-transform:uppercase;letter-spacing:.08em;color:var(--ind)}
.match{display:grid;border:1.5px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;position:relative}
.col:not(.col--champ):not(:nth-last-child(2)) .match::after{content:'';position:absolute;right:-14px;top:50%;width:14px;height:2px;background:var(--line)}
.slot{display:block;width:100%;text-align:left;border:0;background:#fff;padding:9px 12px;font-size:15px;font-weight:600;min-height:42px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.slot+.slot{border-top:1px solid var(--line)}
.slot[data-pick]:hover{background:var(--ind-l)}
.slot.is-win{background:#ecfdf3;color:var(--win)}
.slot.is-win::after{content:' ✓'}
.slot.is-out{color:#a3a3c2;text-decoration:line-through}
.slot.is-bye,.slot.is-tbd{color:#a3a3c2;font-weight:400;font-style:italic;cursor:default}
.champ{display:flex;flex-direction:column;align-items:center;gap:6px;border:2px solid var(--gold);border-radius:14px;padding:16px;background:#fffbeb;text-align:center}
.champ span{font-size:30px}
.champ b{font:700 20px var(--head)}
.champ i{color:var(--mute)}
.empty{color:var(--mute)}
.rr__sum{font-weight:600;color:var(--ind-d);margin:0 0 12px}
.rr{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.rr__sum{grid-column:1/-1}
.rr__r{border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.rr__r b{font-family:var(--head);color:var(--ind)}
.rr__r ul{list-style:none;margin:6px 0 0;padding:0;display:grid;gap:4px;font-size:15px}
.rr__r i{color:var(--mute);font-size:13px}
.rr__rest{color:var(--mute);font-style:italic}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;border-top:4px solid var(--ind)}
.card b{font:700 18px var(--head)}
.card p{margin:6px 0 0;color:var(--mute);font-size:15px}
.faq{display:grid;gap:8px;margin-bottom:24px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:2px 16px}
.faq summary{cursor:pointer;font-weight:600;padding:12px 0;min-height:44px}
.faq p{margin:0 0 14px;color:var(--mute)}
.fb{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-wrap:wrap;gap:14px 20px;align-items:center;justify-content:space-between}
.fb__head{display:flex;gap:12px;align-items:center}
.fb__ic{display:grid;place-items:center;width:44px;height:44px;border-radius:10px;background:var(--ind-l);color:var(--ind-d);flex:none}
.fb__t{font-size:20px;margin:0}
.fb__s{margin:2px 0 0;font-size:14px;color:var(--mute)}
.fb__btns{display:flex;gap:8px}
.fb__b{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:0 14px;font-weight:600;min-height:44px}
.fb__b--up[aria-pressed=true]{border-color:var(--win);color:var(--win)}.fb__b--down[aria-pressed=true]{border-color:#dc2626;color:#b91c1c}
.fb__form,.fb__thx{flex-basis:100%;margin:0}.fb__form{display:grid;gap:8px}
.fb__form textarea{border:1px solid var(--line);border-radius:10px;padding:10px;width:100%}
.fb__thx{color:var(--win);font-weight:600}
.pg{max-width:820px;padding-top:40px}.pg__t{font-size:clamp(30px,4vw,44px)}.prose{overflow-wrap:anywhere}
.list{list-style:none;padding:0}.list li{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:10px 0}
.pg--404{text-align:center}.code404{font:700 90px/1 var(--head);color:var(--ind);margin:0}
.ft{margin-top:50px;background:var(--ink);color:#c9c9e8;padding:30px 0}
.ft p{margin:0 0 10px;font-size:15px;max-width:860px}.ft__copy{opacity:.7}
@media print{.hd,.ft,.arena,.maker__side,#to-chuc,#hoi-dap{display:none!important}.maker{display:block}.maker__main{border:0}.bracket{overflow:visible;flex-wrap:wrap}}
@media (max-width:960px){
 .hd__btn{display:block;margin-left:auto}
 .hd__nav{position:absolute;left:0;right:0;top:58px;background:#fff;border-bottom:1px solid var(--line);display:none;padding:6px var(--g) 12px}
 .hd__nav.is-open{display:block}.hd__nav ul{flex-direction:column}.hd__nav a{padding:12px 4px}
 .maker{grid-template-columns:minmax(0,1fr)}.maker__side{position:static}
 .cards{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){:root{--g:14px}.cards{grid-template-columns:minmax(0,1fr)}.col{width:160px}.maker__main{padding:14px}}