:root{--accent:#4f46e5;--accent-2:#06b6d4;--brand-grad:linear-gradient(135deg,var(--accent),var(--accent-2));--brand-grad-soft:linear-gradient(135deg,rgba(79,70,229,.12),rgba(6,182,212,.12));--glow:rgba(79,70,229,.45);--bg:linear-gradient(180deg,#eef2ff,#e0f7fa);--surface:#f7f9ff;--surface-2:#edf2fb;--text:#0f172a;--muted:#5b6476;--tile-bg:linear-gradient(180deg,#fff,#f3f6ff);--tile-border:#dbe0ea;--tile-selected:linear-gradient(135deg,rgba(79,70,229,.95),rgba(6,182,212,.95));--tile-win:linear-gradient(135deg,rgba(6,182,212,.95),rgba(79,70,229,.95));--announcement-bg:linear-gradient(135deg,rgba(79,70,229,.1),rgba(6,182,212,.1));--announcement-border:rgba(79,70,229,.22)}.dark-mode{--bg:radial-gradient(120% 120% at 10% 10%,#0b1020 0%,#0b1220 40%,#0f172a 100%);--surface:#0f172a;--surface-2:#0b1220;--text:#e5e7eb;--muted:#a6b0c2;--accent:#8b5cf6;--accent-2:#22d3ee;--brand-grad:linear-gradient(135deg,var(--accent),var(--accent-2));--brand-grad-soft:linear-gradient(135deg,rgba(139,92,246,.12),rgba(34,211,238,.12));--glow:rgba(139,92,246,.5);--tile-bg:linear-gradient(180deg,#0f172a,#0b1220);--tile-border:#1f2937;--tile-selected:linear-gradient(135deg,rgba(139,92,246,.9),rgba(34,211,238,.9));--tile-win:linear-gradient(135deg,rgba(34,211,238,.9),rgba(139,92,246,.9));--announcement-bg:linear-gradient(135deg,rgba(139,92,246,.12),rgba(34,211,238,.12));--announcement-border:rgba(139,92,246,.32)}body{background:var(--bg);color:var(--text);transition:background .25s ease,color .25s ease}body,html{margin:0;padding:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}body:before{content:"";position:fixed;inset:-40% -40% auto auto;width:120vw;height:120vh;z-index:-1;background:radial-gradient(55% 55% at 70% 10%,rgba(79,70,229,.16),transparent 50%),radial-gradient(42% 42% at 20% 30%,rgba(6,182,212,.16),transparent 55%);filter:blur(44px);animation:bgfloat 18s ease-in-out infinite alternate}@keyframes bgfloat{0%{transform:translateY(-10px) scale(1);opacity:.9}to{transform:translateY(10px) scale(1.02);opacity:1}}.tile{background:var(--tile-bg);border-color:var(--tile-border)}.tile.selected{background:var(--tile-selected)}.tile.win{background:var(--tile-win);color:#fff}.announcement{background:var(--announcement-bg);border-color:var(--announcement-border)}.container{max-width:1100px;margin:0 auto;padding:20px}.header{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;background:var(--brand-grad-soft);border:1px solid var(--announcement-border);padding:16px 18px;border-radius:16px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 8px 28px rgba(0,0,0,.08)}.header h1{margin:0;font-size:28px;letter-spacing:.2px}.header h1:after{content:none}.grid{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:8px;gap:8px;margin-top:18px}.tile{border:1px solid var(--tile-border);padding:12px;min-height:clamp(56px,18vw,120px);min-width:0;display:flex;align-items:center;justify-content:center;text-align:center;cursor:pointer;border-radius:16px;-webkit-user-select:none;-moz-user-select:none;user-select:none;font-size:clamp(.95rem,1.6vw,1.1rem);transition:transform .08s ease,background .25s ease,color .2s ease,border .2s ease,box-shadow .25s ease;word-break:break-word;box-shadow:0 10px 24px rgba(79,70,229,.08),0 1px 2px rgba(0,0,0,.04)}.tile:focus-visible{outline:3px solid var(--accent-2);outline-offset:2px}.tile:hover{transform:translateY(-1px);box-shadow:0 14px 30px rgba(79,70,229,.12),0 2px 4px rgba(0,0,0,.06)}.tile.selected{color:#fff;border-color:transparent;box-shadow:0 10px 28px var(--glow)}.tile.winning{outline:2px solid transparent;box-shadow:0 0 0 3px hsla(0,0%,100%,.6),0 0 18px 2px var(--glow);animation:bingo-pop .5s cubic-bezier(.68,-.55,.27,1.55) 1}.tile.center{font-weight:800;letter-spacing:.2px}@keyframes bingo-pop{0%{transform:scale(1)}60%{transform:scale(1.15)}to{transform:scale(1)}}.center{font-weight:700}.controls{display:flex;gap:10px;align-items:center}.controls button{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--surface);color:var(--text);border:1px solid var(--tile-border);padding:8px 14px;border-radius:12px;font-weight:600;cursor:pointer;transition:transform .08s ease,box-shadow .15s ease,background .2s ease,border-color .2s ease}.controls button:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(79,70,229,.1);border-color:rgba(79,70,229,.35)}.controls button:active{transform:translateY(0);box-shadow:none}.controls button[aria-label="Toggle dark mode"]{background:var(--brand-grad-soft);border-color:var(--announcement-border)}.controls button:first-child{background:linear-gradient(135deg,rgba(79,70,229,.12),rgba(6,182,212,.12))}.controls-compact{display:none;gap:8px}.controls-compact button{border:1px solid var(--tile-border);background:var(--surface-2);padding:6px 10px;border-radius:10px;font-weight:600;box-shadow:0 2px 8px rgba(0,0,0,.06)}.action-btn,.controls-compact button{-webkit-appearance:none;-moz-appearance:none;appearance:none;color:var(--text);font-size:14px;cursor:pointer}.action-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;font-weight:700;border-radius:8px;border:1.5px solid var(--tile-border);background:var(--surface);box-shadow:none;transition:transform .08s ease,box-shadow .15s ease,background .2s ease,border-color .2s ease,color .15s ease;height:40px}.action-btn:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(79,70,229,.08);border-color:rgba(79,70,229,.25)}.action-btn:active{transform:translateY(0);box-shadow:none}.action-btn:focus-visible{outline:3px solid rgba(79,70,229,.14);outline-offset:2px}.action-btn.primary{background:var(--surface);border:1px solid var(--tile-border);color:var(--text);font-size:14px}.header-left{display:flex;align-items:center;gap:10px}.header-logo{height:28px;display:inline-block}.site-title{margin:0;display:flex;align-items:baseline;gap:8px}.site-link{font-size:13px;color:var(--muted);text-decoration:none}.header-status{display:flex;gap:8px;align-items:center}.status-players{font-size:12px;opacity:.7}.action-btn.ghost{background:transparent;border:1px solid rgba(34,34,34,.12);color:var(--muted)}.action-btn .btn-icon{width:16px;height:16px;display:inline-block;flex:0 0 16px}.action-btn .btn-icon svg{width:100%;height:100%;display:block;fill:currentColor}.announcement{margin-top:16px;padding:12px 14px;border-radius:12px;max-width:95vw;box-sizing:border-box;border:1px solid var(--announcement-border)}.announcement.win{background:var(--announcement-bg);border-color:var(--announcement-border)}#bottom-controls,.bottom-toolbar,.controls-compact,.fab-container,.floating-actions,.mobile-bar,[role=toolbar][aria-label*=Mobile i],[style*="position: fixed"][style*=bottom],div[class*=bottom-bar],div[class*=nav-bar]:not(.header),div[class*=overlay][style*=bottom],div[class*=toolbar][style*=bottom],div[style*="bottom: 0"][style*="position: fixed"],div[style*="bottom:0"][style*="position:fixed"],div[style*="position:fixed"][style*="bottom:0"],div[style*="z-index: 999"][style*="bottom:"],nav[style*="position:fixed"][style*=bottom]{display:none!important;visibility:hidden!important;opacity:0!important;height:0!important;min-height:0!important;max-height:0!important;padding:0!important;margin:0!important;pointer-events:none!important;transform:translateY(200%)!important}@media (max-width:700px){.container{padding:10px}.header{flex-direction:column;align-items:stretch;gap:8px}.controls{display:none}.controls-compact{display:none!important}.grid{gap:6px}.tile{min-height:44px}.announcement,.tile{padding:6px;font-size:.95rem}.footer{font-size:10px}}.footer{margin-top:24px;color:var(--muted);font-size:12px}body:after{content:"";display:block;height:80px;width:100%}