:root{font-family:Arial,Helvetica,sans-serif;line-height:1.4;--bg: #1c1815;--surface: #322821;--surface-2: #3b2f27;--surface-3: #2a221c;--border: #8a6a4f;--border-soft: #6f543f;--accent: #5d605d;--accent-dark: #474a48;--accent-hover: #8a8878;--brass: #b08d57;--brass-soft: #8e6f45;--text: #efe7da;--text-muted: #c7b9a5;--text-dim: #9f9487;--success-bg: #2d312d;--success-text: #d9dfd8;--error: #d8a3a3;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#1a1613 0%,var(--bg) 100%);color:var(--text)}button,input{font:inherit}.app-shell{min-height:100vh;max-width:1200px;margin:0 auto;padding:48px 24px}.title-box{max-width:1080px;margin:0 auto 32px;padding:18px 28px;text-align:center;color:var(--text);background:linear-gradient(180deg,var(--surface-2) 0%,var(--surface) 100%);border:2px solid var(--brass);box-shadow:0 0 0 2px #00000040 inset,0 10px 24px #00000047}.title-box h1{margin:0;font-size:3rem;font-weight:500;letter-spacing:.03em;color:#f3ecdf;text-shadow:0 1px 0 rgba(0,0,0,.35)}.connection-line{margin-bottom:20px;text-align:center;font-size:1.1rem;color:var(--text-muted)}.top-banner,.form-card,.game-panel,.game-board-panel{border:2px solid var(--border);background:var(--surface);color:var(--text);font-size:1.05rem}.top-banner{max-width:900px;margin:0 auto 20px;padding:12px 16px;border-color:var(--brass-soft);background:var(--surface-2);text-align:center;font-weight:600}.menu-stack{display:flex;flex-direction:column;align-items:center;gap:48px;margin-top:48px}.menu-button,.action-button,.secondary-button{border:2px solid var(--border-soft);background:linear-gradient(180deg,var(--surface) 0%,var(--surface-3) 100%);color:var(--text);cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease,transform .15s ease,box-shadow .15s ease;box-shadow:0 6px 14px #00000038}.menu-button:hover,.action-button:hover,.secondary-button:hover{background:var(--accent-hover);color:#171411;border-color:var(--brass);box-shadow:0 8px 18px #00000047;transform:translateY(-1px)}.menu-button{width:370px;min-height:105px;padding:16px 20px;font-size:2.2rem;border-radius:10px}.action-button,.secondary-button{min-width:160px;min-height:52px;padding:10px 18px;border-radius:8px;font-weight:600}.resume-button{border-color:var(--brass)}.form-card{max-width:540px;margin:32px auto 0;padding:24px}.form-card h2,.game-panel h2,.game-board-panel h2{margin-top:0}label{display:block;margin-bottom:16px;color:var(--text-muted)}input{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--border);background:#1b1714;color:var(--text)}.button-row{display:flex;gap:12px;flex-wrap:wrap}.button-row.centered{justify-content:center;margin-top:16px}.game-layout{display:grid;grid-template-columns:1.3fr 2fr .9fr;gap:20px;max-width:1400px;margin:0 auto;width:95%}.game-panel,.game-board-panel{padding:18px}.board-status{margin-bottom:12px;font-weight:600;color:var(--text-muted)}.board-wrap{max-width:520px;margin:0 auto}.move-list{display:flex;flex-direction:column;gap:4px;font-family:monospace;font-size:1.1rem}.move-row{display:grid;grid-template-columns:40px 1fr 1fr;gap:8px}.move-number{font-weight:700;color:var(--text-muted)}.move-white{color:var(--text)}.move-black{color:var(--text-dim)}.error-text{color:var(--error);font-weight:600}.result-banner{padding:10px 12px;border:2px solid var(--border);background:var(--success-bg);color:var(--success-text);font-weight:700}.rematch-box{margin-top:16px;margin-bottom:16px;padding:12px;border:2px solid var(--border);background:var(--success-bg)}.resign-box{margin-top:16px;margin-bottom:16px}.resign-button{border-color:#a61b1b}.centered-text{text-align:center}@media(max-width:1100px){.game-layout{grid-template-columns:1fr}.title-box h1{font-size:2.3rem}.menu-button{width:100%;max-width:370px}}