*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f0f0f;--bg-card:#1a1a2e;--bg-input:#16213e;--bg-hover:#1f2b47;--text:#e0e0e0;--text-muted:#8892a4;--accent:#7c3aed;--accent-hover:#6d28d9;--accent-light:#a78bfa;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--border:#2a2a4a;--radius:8px;--radius-lg:12px;--font:"Segoe UI",system-ui,-apple-system,sans-serif}body,html{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.5;min-height:100vh}.page{margin:0 auto;max-width:960px;padding:24px 16px}.page-center{align-items:center;display:flex;flex-direction:column;justify-content:center;min-height:100vh;padding:24px 16px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}h1,h2,h3{font-weight:600;letter-spacing:-.01em}h1{font-size:1.75rem}h2{font-size:1.25rem}h3{font-size:1rem}.text-muted{color:var(--text-muted)}.text-accent{color:var(--accent-light)}.btn{align-items:center;border:none;border-radius:var(--radius);cursor:pointer;display:inline-flex;font-family:var(--font);font-size:.875rem;font-weight:500;gap:6px;justify-content:center;padding:10px 20px;transition:background-color .15s,opacity .15s;white-space:nowrap}.btn:disabled{cursor:not-allowed;opacity:.5}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){background:#059669}.btn-warning{background:var(--warning);color:#000}.btn-warning:hover:not(:disabled){background:#d97706}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#dc2626}.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text-muted)}.btn-ghost:hover:not(:disabled){background:var(--bg-hover);color:var(--text)}.btn-sm{font-size:.8rem;padding:6px 12px}.input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);display:block;font-family:var(--font);font-size:.875rem;outline:none;padding:10px 14px;transition:border-color .15s;width:100%}.input:focus{border-color:var(--accent)}.input::-moz-placeholder{color:var(--text-muted)}.input::placeholder{color:var(--text-muted)}.game-layout{display:grid;gap:16px;grid-template-columns:1fr 300px;min-height:calc(100vh - 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