:root{--bg:#10201d;--panel:#173029;--text:#eef1ea;--muted:#a9bcb3;--accent:#e0502f;--wood:#d8b06a;--bd:#2a463d;
padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:light){:root{--bg:#eef2ec;--panel:#fff;--text:#14231f;--muted:#4d625a;--bd:#cfdad2;--accent:#c23b1c}}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--text);font:400 17px/1.6 "Be Vietnam Pro",system-ui,"Segoe UI",Arial,sans-serif}
a{color:inherit}
:focus-visible{outline:3px solid var(--wood);outline-offset:3px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.notice{background:var(--accent);color:#fff;text-align:center;font-size:14px;padding:6px 12px}
header{position:sticky;top:env(safe-area-inset-top,0px);background:var(--bg);border-bottom:1px solid var(--bd);z-index:5}
nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.logo{font-weight:800;font-size:22px;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo img{display:block;width:40px;height:40px;border-radius:50%}
.admin-card{display:flex;gap:20px;align-items:center;background:var(--panel);border:1px solid var(--bd);border-radius:14px;padding:16px;max-width:520px;margin:20px 0}
.admin-card img{width:96px;height:96px;flex:none}
.admin-card p{margin:0}
nav ul{display:flex;gap:4px 22px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
nav ul a{text-decoration:none;color:var(--muted);font-weight:600;font-size:15px}
nav ul a:hover,nav ul a[aria-current]{color:var(--text)}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:56px 20px 64px}
h1{font-size:clamp(34px,5.4vw,58px);line-height:1.08;margin:0 0 18px;font-weight:800;letter-spacing:-.02em}
h1.h1s{font-size:clamp(28px,4vw,40px)}
.lead{color:var(--muted);max-width:52ch;margin:0 0 28px}
.cta{display:flex;flex-wrap:wrap;gap:12px}
.btn{display:inline-block;padding:13px 22px;border-radius:10px;font:inherit;font-weight:700;text-decoration:none;border:2px solid var(--bd);background:var(--panel);color:var(--text);cursor:pointer}
.btn.main{background:var(--accent);border-color:var(--accent);color:#fff}
.hero .btn.main{font-size:18px;padding:14px 30px}
.btn:hover{filter:brightness(1.1)}
.btn:disabled{opacity:.45;cursor:not-allowed;filter:none}
.board-preview{width:100%;max-width:420px;justify-self:center;border-radius:14px;box-shadow:0 18px 40px rgba(0,0,0,.35)}
section{padding:56px 0;border-top:1px solid var(--bd)}
section.first{border-top:0}
h2{font-size:clamp(26px,3.6vw,36px);margin:0 0 24px;line-height:1.2}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;list-style:none;margin:0;padding:0}
.feat li{background:var(--panel);border:1px solid var(--bd);border-radius:12px;padding:20px}
.feat b{display:block;font-size:18px;margin-bottom:6px}
.feat span{color:var(--muted);font-size:15px}
.modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.modes p{color:var(--muted);margin:0 0 12px}
footer{border-top:1px solid var(--bd);padding:36px 0 48px;color:var(--muted);font-size:15px}
footer .wrap{display:flex;flex-wrap:wrap;gap:24px 60px;justify-content:space-between}
footer p{margin:0 0 4px}

/* Trang chơi */
.page-choi section.first{padding:28px 0 48px}
.play{display:grid;grid-template-columns:minmax(0,520px) minmax(260px,1fr);gap:32px;align-items:start}
.play-board svg{display:block;width:100%;height:auto;border-radius:14px;box-shadow:0 18px 40px rgba(0,0,0,.35);touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.play-side{background:var(--panel);border:1px solid var(--bd);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:16px}
.status{margin:0;font-size:20px;font-weight:800;line-height:1.3;min-height:2.6em}
.status.warn{color:var(--accent)}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:14px;color:var(--muted);font-weight:600}
select{font:inherit;padding:10px 12px;border-radius:10px;border:2px solid var(--bd);background:var(--bg);color:var(--text)}
.actions{display:flex;flex-wrap:wrap;gap:10px}
.actions .btn{padding:11px 16px;font-size:15px}
.meta{margin:0;color:var(--muted);font-size:14px}
#board .hit{fill:transparent;cursor:pointer}
#board:not(:focus-visible) .cursor{display:none}
#board:focus-visible{outline-offset:4px}
@media (max-width:820px){
  .hero{grid-template-columns:1fr;padding:36px 20px 44px}
  .board-preview{order:-1;max-width:320px}
  .play{grid-template-columns:1fr;gap:20px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* Nội dung trang do quản trị soạn */
.content{max-width:860px}.content.gameintro{margin-bottom:24px;max-width:1080px}
.content img{max-width:100%;height:auto}
.content h2,.content h3{margin:1.2em 0 .5em}
.content table{border-collapse:collapse;width:100%}.content td,.content th{border:1px solid var(--bd);padding:8px 10px;text-align:left}
.content blockquote{margin:1em 0;padding:4px 16px;border-left:4px solid var(--accent);color:var(--muted)}
.muted{color:var(--muted)}
.hero.nopreview{grid-template-columns:1fr}
/* Thành viên */
.mbox{background:var(--panel);border:1px solid var(--bd);padding:20px;display:flex;flex-direction:column;gap:12px;max-width:480px}
.mbox h2{font-size:22px;margin:0}.mbox p{margin:0}
.mbox label{display:flex;flex-direction:column;gap:5px;font-size:14px;font-weight:600;color:var(--muted)}
.mbox label small{font-weight:400}
.mbox input[type=text],.mbox input[type=password],.mbox select{font:inherit;padding:11px 12px;border:2px solid var(--bd);background:var(--bg);color:var(--text);width:100%}
.mbox label.chk{flex-direction:row;align-items:center;gap:8px;font-weight:400}
.mbox .info{white-space:pre-line;background:var(--bg);border:1px dashed var(--bd);padding:10px 12px;border-radius:8px;font-size:15px}
.mbox button.btn{align-self:flex-start}
.balances{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,240px));gap:14px;margin:16px 0}
.balances .mbox{gap:2px}.balances b{font-size:30px}
.mcols{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin:24px 0;align-items:start}
.mcols .mbox{max-width:none}
.mflash{padding:11px 14px;border-radius:10px;font-weight:700;margin:12px 0;border:1px solid var(--bd);background:var(--panel)}
.mflash.ok{border-color:#1b7f3b;color:#47c46f}.mflash.err{border-color:#d9443a;color:#ff8a80}
.tablewrap{overflow-x:auto;border:1px solid var(--bd);border-radius:10px;margin-bottom:12px}
.mtable{border-collapse:collapse;width:100%;font-size:15px}
.mtable th,.mtable td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--bd);white-space:nowrap}
.mtable .num{text-align:right}
@media (max-width:820px){.mbox{max-width:none}}


/* Trang chủ */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;counter-reset:s}
.steps li{display:flex;gap:16px;align-items:flex-start;background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,12px);padding:20px}
.steps .num{flex:none;width:42px;height:42px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;font-size:20px;display:flex;align-items:center;justify-content:center}
.steps b{display:block;font-size:18px;margin-bottom:4px}.steps p{margin:0;color:var(--muted);font-size:15px}
.pieces li{border-left:4px solid var(--accent)}
.appband .lead{max-width:60ch}
.faq{max-width:820px}
.faq details{background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,12px);padding:4px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;padding:12px 0;list-style-position:inside}
.faq details p{margin:0 0 14px;color:var(--muted)}
.ctaband{text-align:center}.ctaband .lead{margin-left:auto;margin-right:auto}.ctaband .cta{justify-content:center}

/* Phòng chơi */
.roomsec{padding:28px 0 56px}
.rl-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.rl-main{display:flex;flex-direction:column;gap:16px}.rl-main .mbox{max-width:560px}
.rl-row{display:flex;gap:12px;flex-wrap:wrap}.rl-row>*{flex:1 1 150px}
.rl-code input{font:inherit;padding:11px 12px;border:2px solid var(--bd);background:var(--bg);color:var(--text);text-transform:uppercase;letter-spacing:.2em;border-radius:var(--r,10px)}
.rl-list{display:flex;flex-direction:column;gap:10px}
.rl-room{display:flex;gap:14px;align-items:center;justify-content:space-between;background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,12px);padding:14px 16px}
.rl-info{display:flex;flex-direction:column;gap:2px;min-width:0}.rl-info b{overflow-wrap:anywhere}.rl-info span{font-size:14px}
.rl-state.waiting{color:#47c46f;font-weight:700}.rl-state.playing{color:var(--accent);font-weight:700}
.rl-rank{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:6px}.rl-rank li{display:grid;grid-template-columns:1fr auto;gap:0 10px}.rl-rank small{grid-column:1/-1}
.rl-note{font-size:13px!important}
.rr{display:grid;grid-template-columns:minmax(0,520px) minmax(280px,1fr);gap:28px;align-items:start}
.rr-board svg{display:block;width:100%;height:auto;border-radius:14px;box-shadow:0 18px 40px rgba(0,0,0,.35);touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.rr-side{display:flex;flex-direction:column;gap:10px;min-width:0}
.rr-title{display:flex;flex-wrap:wrap;gap:0 4px;font-size:15px}.rr-title b{font-size:18px}
.rr-player{display:flex;align-items:center;gap:12px;background:var(--bg);border:2px solid var(--bd);border-radius:var(--r,10px);padding:10px 12px}
.rr-player.turn{border-color:var(--accent)}
.rr-chip{flex:none;width:44px;text-align:center;border-radius:99px;font-weight:800;font-size:14px;padding:3px 0;color:#fff}
.rr-chip.red{background:#b3261e}.rr-chip.black{background:#1a1a1a;border:1px solid #555}
.rr-name{display:flex;flex-direction:column;flex:1;min-width:0}.rr-name b{overflow-wrap:anywhere}
.rr-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:#888;margin-left:6px}.rr-dot.on{background:#47c46f}
.rr-clock{font-variant-numeric:tabular-nums;font-weight:800;font-size:22px}.rr-clock.low{color:#ff6b5e}
.rr-actions .btn{padding:9px 14px;font-size:15px}
.rr-h{margin:6px 0 0;font-size:16px}
.rr-moves{display:flex;flex-wrap:wrap;gap:4px 10px;max-height:130px;overflow-y:auto;background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,10px);padding:10px;font-size:14px}
.rr-mv.r{color:#e8776b}.rr-mv.b{color:var(--muted)}
.rr-chat{background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,10px);padding:10px;display:flex;flex-direction:column;gap:8px}
.rr-log{height:170px;overflow-y:auto;font-size:15px;display:flex;flex-direction:column;gap:4px}.rr-msg b{color:var(--muted)}.rr-msg.mine b{color:var(--accent)}
.rr-chatform{display:flex;gap:8px}.rr-chatform input{flex:1;min-width:0;font:inherit;padding:10px 12px;border:2px solid var(--bd);background:var(--bg);color:var(--text);border-radius:var(--r,10px)}
.rr-chatform .btn{padding:9px 16px}
#room-toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#1c2b27;color:#fff;padding:11px 18px;border-radius:12px;font-weight:700;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:300;max-width:92vw;text-align:center}
#room-toast.show{opacity:1;transform:translateX(-50%)}#room-toast.bad{background:#b3261e}
#room-board .hit{fill:transparent;cursor:pointer}
@media (max-width:900px){.rl-grid,.rr{grid-template-columns:1fr}.rl-main .mbox{max-width:none}}

/* ---- Voice và toàn màn hình trong phòng chơi ---- */
.rr-board{position:relative}
.rr-fsbtn{position:absolute;top:8px;right:8px;width:40px;height:40px;border-radius:10px;border:0;background:rgba(0,0,0,.5);color:#fff;font-size:22px;line-height:1;cursor:pointer;z-index:2}
.rr-fsbar{display:none}
.rr-voice{display:flex;flex-wrap:wrap;gap:8px;align-items:center;background:var(--panel);border:1px solid var(--bd);border-radius:var(--r,10px);padding:10px}
.rr-voice .btn{padding:8px 14px;font-size:15px}.rr-vstat{flex:1 1 100%;font-size:14px}
body.rr-lock{overflow:hidden;overscroll-behavior:none}
.rr.full{position:fixed;inset:0;z-index:200;background:var(--bg);display:grid;grid-template-columns:minmax(0,1fr);grid-auto-rows:auto;align-content:center;justify-items:center;gap:6px;padding:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));height:100vh;height:100dvh;overflow:hidden}
.rr.full .rr-side,.rr.full .play-side{display:contents}
.rr.full .rr-title,.rr.full .rr-actions,.rr.full .meta,.rr.full .rr-h,.rr.full .rr-moves,.rr.full .rr-voice,.rr.full .rr-fsbtn{display:none}
.rr.full [data-pos=top]{order:1}.rr.full .rr-chat{order:2}.rr.full .rr-board{order:3}.rr.full [data-pos=bot]{order:4}.rr.full .status{order:5}.rr.full .rr-fsbar{order:6}
.rr.full .rr-player{width:100%;padding:6px 10px;gap:10px}.rr.full .rr-clock{font-size:20px}
.rr.full .status{margin:0;font-size:15px;text-align:center;width:100%}
.rr.full .rr-board{width:min(100%,calc((100vh - 320px) * .902));width:min(100%,calc((100dvh - 320px) * .902));margin:0 auto}
.rr.full .rr-board svg{box-shadow:none;border-radius:10px}
.rr.full .rr-fsbar{display:flex;gap:8px;width:100%;justify-content:center}.rr.full .rr-fsbar .btn{flex:1;max-width:170px;padding:10px 8px;font-size:16px}
.rr-fsbar .btn.live{background:#1b7f3b;color:#fff;border-color:#1b7f3b}.rr-fsbar .btn.wait{border-color:#e0a020}.rr-fsbar .btn.muted{background:#b3261e;color:#fff;border-color:#b3261e}
.rr-fsbar .btn.alert{background:var(--accent);color:#fff;border-color:var(--accent)}
.rr.full .rr-chat{display:flex;flex-direction:column;gap:4px;width:100%;padding:4px 8px;border-radius:10px}
.rr.full.chat-off .rr-chat{display:none}
.rr.full .rr-log{height:auto;min-height:1.4em;max-height:2.9em;overflow:hidden;justify-content:flex-end;font-size:14px;line-height:1.4}
.rr.full .rr-chatform input{padding:6px 10px}.rr.full .rr-chatform .btn{padding:6px 14px}
.rr.full .rr-chatform input{font-size:16px}
@media (orientation:landscape) and (max-height:560px){
  .rr.full{grid-template-columns:auto minmax(0,1fr);align-content:center;justify-items:stretch;column-gap:12px}
  .rr.full .rr-board{grid-column:1;grid-row:1/span 6;width:auto;height:calc(100vh - 16px);height:calc(100dvh - 16px);aspect-ratio:460/510;align-self:center}
  .rr.full [data-pos],.rr.full .status,.rr.full .rr-fsbar{grid-column:2;max-width:none}
  .rr.full .rr-chat{grid-column:2;grid-row:2;max-width:none}
  .rr.full [data-pos=top]{grid-row:1}.rr.full [data-pos=bot]{grid-row:3}.rr.full .status{grid-row:4}.rr.full .rr-fsbar{grid-row:5}
  .rr.full .rr-log{max-height:4.2em}.rr.full{row-gap:4px}
  .rr.full .rr-fsbar .btn{max-width:none}
}

/* ---- Toàn màn hình khi đấu với máy ---- */
.play-board{position:relative}.pf-exit{display:none}
.play.pfull{position:fixed;inset:0;z-index:200;background:var(--bg);margin:0;max-width:none;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;height:100vh;height:100dvh;overflow:hidden;padding:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left))}
.play.pfull .play-side{display:contents}
.play.pfull .field,.play.pfull .meta,.play.pfull .rr-fsbtn{display:none}
.play.pfull .status{order:1;min-height:0;margin:0;font-size:16px;text-align:center}
.play.pfull .play-board{order:2;width:min(100%,calc((100vh - 120px) * .902));width:min(100%,calc((100dvh - 120px) * .902))}
.play.pfull .play-board svg{box-shadow:none;border-radius:10px}
.play.pfull .actions{order:3;display:flex;gap:8px;width:100%;justify-content:center;flex-wrap:nowrap}
.play.pfull .actions .btn{flex:1;max-width:160px;padding:10px 6px;font-size:15px}.play.pfull .pf-exit{display:inline-block}
@media (orientation:landscape) and (max-height:560px){
  .play.pfull{display:grid;grid-template-columns:auto minmax(0,1fr);align-content:center;column-gap:14px}
  .play.pfull .play-board{grid-column:1;grid-row:1/span 3;width:auto;height:calc(100vh - 16px);height:calc(100dvh - 16px);aspect-ratio:460/510}
  .play.pfull .status{grid-column:2;grid-row:1;align-self:end}.play.pfull .actions{grid-column:2;grid-row:2;flex-wrap:wrap}.play.pfull .actions .btn{max-width:none}
}
.play.pfull #btn-sound,.play.pfull #btn-full{display:none}.play.pfull .actions .btn{white-space:nowrap}
.rr-fsbar .btn.off{opacity:.55}

/* Nút toàn màn hình nằm trên bàn cờ, không đè lên quân */
.boardtools{display:flex;justify-content:flex-end;margin:0 0 8px}.boardtool{padding:7px 14px;font-size:15px}
.rr.full .boardtools,.play.pfull .boardtools{display:none}

/* Cụm nút âm thanh và nhạc nền */
.sfx-controls{display:contents}.play.pfull .sfx-controls{display:none}

/* Cờ úp */
#sfx-slot{display:contents}.play.pfull #sfx-slot{display:none}
.rules{margin-top:4px;font-size:15px}.rules summary{cursor:pointer;font-weight:700}.rules ul{margin:8px 0 0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.play.pfull .rules,.play.pfull #gone{display:none}
.rr-cap{flex-basis:100%;font-size:13px;color:#8a4b00;margin-top:2px}