:root{
  --bg:#0f1b24;
  --game:#152431;
  --panel:#1a2c38;
  --input:#0f212e;
  --tile:#2f4553;
  --tile-hover:#3a5161;
  --tile-shadow:#223543;
  --border:#2a4254;
  --blue:#1475e1;
  --blue-hover:#1267c7;
  --text:#fff;
  --muted:#b1bcca;
  --muted-2:#7a8a99;
  --green:#2bd47d;
  --red:#e9415f;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}
a{color:inherit;text-decoration:none}

/* ---- topbar ---- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 22px;border-bottom:1px solid var(--border);background:#11202b}
.back{color:var(--muted);font-size:14px;font-weight:500;transition:.15s}
.back:hover{color:var(--text)}
.logo{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:20px;letter-spacing:-.5px}
.logo .dot{color:var(--green)}
.balance{display:flex;flex-direction:column;align-items:flex-end;line-height:1.1;background:var(--input);border:1px solid var(--border);border-radius:9px;padding:6px 13px}
.balance small{color:var(--muted-2);font-size:10px;text-transform:uppercase;letter-spacing:.5px}
.balance b{font-size:15px;color:var(--green);font-family:'Space Grotesk',sans-serif}

/* ---- layout ---- */
.game{display:flex;gap:0;max-width:1180px;margin:22px auto;background:var(--game);border-radius:14px;overflow:hidden;border:1px solid rgba(255,255,255,.03);min-height:560px}
.panel{width:300px;flex:0 0 300px;background:var(--panel);padding:16px;display:flex;flex-direction:column;gap:14px}
.board-wrap{flex:1;padding:22px;display:flex;flex-direction:column;gap:16px}

/* ---- campos ---- */
.field{display:flex;flex-direction:column;gap:7px}
.field-label{font-size:13px;color:var(--muted);font-weight:500;display:flex;justify-content:space-between;align-items:center}
.field-label .usd{color:var(--muted-2);font-size:12px}
.bet-row{display:flex;gap:8px}
.input-wrap{position:relative;flex:1;display:flex;align-items:center;background:var(--input);border:1px solid var(--border);border-radius:8px;transition:.15s}
.input-wrap:focus-within{border-color:var(--blue)}
.input-wrap.static{background:var(--input)}
.input-wrap .prefix{padding-left:12px;color:var(--muted-2);font-size:14px}
.input-wrap input{width:100%;background:transparent;border:none;outline:none;color:var(--text);font-family:inherit;font-size:14px;font-weight:600;padding:11px 12px}
.input-wrap input[readonly]{color:var(--muted)}
.chip{background:var(--input);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:0 14px;font-weight:600;font-size:13px;cursor:pointer;font-family:inherit;transition:.15s}
.chip:hover{background:var(--tile)}
.chip:disabled{opacity:.5;cursor:not-allowed}

/* ---- botões ---- */
.btn-primary{background:var(--blue);color:#fff;border:none;border-radius:8px;padding:14px;font-weight:700;font-size:15px;cursor:pointer;font-family:inherit;transition:.15s;box-shadow:0 2px 0 rgba(0,0,0,.2)}
.btn-primary:hover{background:var(--blue-hover)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed}
.btn-secondary{background:var(--tile);color:var(--muted);border:none;border-radius:8px;padding:12px;font-weight:600;font-size:14px;cursor:pointer;font-family:inherit;transition:.15s}
.btn-secondary:enabled{color:var(--text)}
.btn-secondary:enabled:hover{background:var(--tile-hover)}
.btn-secondary:disabled{opacity:.6;cursor:not-allowed}

.mines-legend{display:flex;flex-direction:column;gap:7px;font-size:12px;color:var(--muted-2)}
.mines-legend span{display:flex;align-items:center;gap:8px}
.mines-legend .mark{width:13px;height:13px;border-radius:4px;flex:0 0 13px}
.mines-legend .mark.gem{background:linear-gradient(#54e89c,#2bd47d)}
.mines-legend .mark.mine{background:linear-gradient(#e9415f,#a8243a)}

.rules{font-size:12px;line-height:1.55;color:var(--muted-2);border-top:1px solid var(--border);padding-top:14px;margin-top:2px}
.rules b{color:var(--muted)}

/* ---- versus / estado ---- */
.versus{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--panel);border-radius:10px;padding:12px 18px}
.vs-player{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px;transition:.2s}
.vs-player .avatar{font-size:20px}
.vs-sep{font-size:13px;color:var(--muted);text-align:center;flex:1}
.vs-player.turn{color:var(--green);text-shadow:0 0 12px rgba(43,212,125,.5)}
.vs-player.turn .avatar{transform:scale(1.18)}
.vs-player.win{color:var(--green);text-shadow:0 0 12px rgba(43,212,125,.5)}
.vs-player.win .avatar{transform:scale(1.18)}
.vs-player.lost{color:var(--red);opacity:.75}

/* ---- tabuleiro partilhado (grelha 4×4) ---- */
.board{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;width:100%;max-width:520px;margin:0 auto;flex:1;align-content:center}
.tile{
  background:var(--tile);border:none;border-radius:8px;
  box-shadow:0 4px 0 var(--tile-shadow);transition:transform .08s,background .15s;
  display:flex;align-items:center;justify-content:center;position:relative;
  aspect-ratio:1;padding:0;cursor:default;
}
.tile svg{width:54%;height:54%}

/* na tua vez, as casas por revelar ficam clicáveis */
.board.live .tile:not(.revealed){cursor:pointer}
.board.live .tile:not(.revealed):hover{background:var(--tile-hover)}
.board.live .tile:not(.revealed):active{transform:translateY(2px);box-shadow:0 2px 0 var(--tile-shadow)}
.tile.chosen{background:var(--tile-hover);box-shadow:0 0 0 2px var(--blue),0 0 14px rgba(20,117,225,.5)}
.board.locked .tile:not(.revealed){cursor:default}

.tile.gem{background:#0f2c24;box-shadow:0 4px 0 #0a1f1a;animation:pop .25s ease}
.tile.mine{background:#3a1620;box-shadow:0 4px 0 #2a0f17;animation:pop .25s ease}
.tile.dim{opacity:.34}
.tile .who{position:absolute;bottom:5px;right:6px;font-size:9px;font-weight:700;letter-spacing:.3px;color:var(--muted);text-transform:uppercase}
.tile.gem .who{color:var(--green)}
.tile.mine .who{color:var(--red)}
@keyframes pop{0%{transform:scale(.7)}60%{transform:scale(1.08)}100%{transform:scale(1)}}

/* ---- toast ---- */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px 22px;font-weight:600;font-size:15px;opacity:0;pointer-events:none;transition:.3s;box-shadow:0 14px 40px rgba(0,0,0,.5);z-index:20}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.win{border-color:var(--green);color:var(--green)}
.toast.lose{border-color:var(--red);color:var(--red)}
.toast.push{border-color:var(--blue);color:#69b4ff}

@media(prefers-reduced-motion:reduce){
  .tile.gem,.tile.mine{animation-duration:.01ms}
}

@media(max-width:760px){
  .game{flex-direction:column;margin:14px;min-height:auto}
  .panel{width:100%;flex:none}
}