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860px){.lobby-plate{grid-template-columns:minmax(0,1fr);max-width:480px;gap:1.5rem}.lobby-mark-board{max-width:260px}}@media (max-width: 480px){.lobby.entry-screen{place-items:start center}.lobby-mark-board{max-width:210px}}.game-page{height:100vh;background:radial-gradient(circle at 18% 22%,rgba(216,180,100,.12),transparent 22%),radial-gradient(circle at 82% 14%,rgba(255,255,255,.05),transparent 18%),linear-gradient(160deg,#0d1116,#07090d);display:flex;align-items:stretch;justify-content:center;color:#f4f0e7;overflow:hidden}.game-shell{display:flex;flex-direction:row;align-items:stretch;width:100%;max-width:1960px;min-height:100vh;margin:0 auto;padding:.35rem .45rem;box-sizing:border-box;gap:.55rem}.board-stage{flex:1;min-width:0;min-height:0;display:flex;align-items:stretch;justify-content:stretch}.board-stage-frame{flex:1;min-height:0;display:flex;align-items:stretch;justify-content:center}.game-sidebar{width:min(420px,34vw);flex-shrink:0;display:flex;flex-direction:column;gap:.55rem;min-height:0;overflow:hidden}.sidebar-header{flex-shrink:0;display:flex;align-items:baseline;gap:.5rem;padding:0 .6rem}.room-code-label{font-size:.62rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:#ffffff61}.room-code-value{font-size:.95rem;font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.14em;text-transform:uppercase;white-space:nowrap;color:#f2d594}.game-sidebar>.move-history{flex:1;min-height:0}.entry-notice{display:flex;flex-direction:column;align-items:flex-start;gap:.55rem}.entry-notice-title{margin:0;font-size:1.4rem;font-weight:650;letter-spacing:.01em;color:var(--text)}.entry-notice-body{margin:0;max-width:42ch;line-height:1.55;color:var(--text-dim)}.entry-notice-aside{margin:0;font-size:.88rem;color:var(--text-faint)}.loading-spinner{width:30px;height:30px;margin-bottom:.5rem;border:2px solid rgba(255,255,255,.1);border-top-color:var(--gold-bright);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 1200px){.game-page{height:auto;min-height:100vh;overflow-y:auto}.game-shell{flex-direction:column;min-height:auto;padding:.6rem}.board-stage{min-height:min(62vh,720px)}.game-sidebar{width:100%;max-width:none}}@media (max-width: 720px){.game-shell{gap:.75rem;padding:.75rem}}.victory-overlay{position:fixed;inset:0;background:#030508d1;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:1rem;animation:fadeIn .4s ease}.victory-modal{position:relative;width:min(420px,92vw);padding:2.5rem 2rem;text-align:center;border-radius:24px;background:var(--glass-bg-strong);border:1px solid var(--glass-border-strong);box-shadow:var(--glass-shadow-strong);animation:scaleIn .35s ease}.victory-modal:before{content:"";position:absolute;top:0;left:1.5rem;right:1.5rem;height:3px;border-radius:0 0 4px 4px;background:linear-gradient(90deg,transparent,rgba(216,180,100,.84),transparent)}.victory-crown{display:block;width:5.2rem;height:5.2rem;margin:0 auto .5rem}.victory-modal h2{margin:0 0 .5rem;font-size:2rem;font-weight:700}.victory-modal p{color:#fff9;margin:0 0 1.5rem;font-size:1rem}.victory-home-btn{padding:.75rem 2rem;border-radius:14px;border:1px solid rgba(255,255,255,.2);background:#ffffff1a;color:#f2d594;font-size:1rem;font-weight:700;cursor:pointer;transition:background .2s ease,transform .2s ease}.victory-home-btn:hover{background:#ffffff2e;transform:translateY(-1px)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}