:root{--color-good:#3b82f6;--color-evil:#ef4444;--color-bg:#0f172a;--color-surface:#1e293b;--color-text:#f1f5f9;--color-text-muted:#94a3b8;--color-border:#334155;--color-accent:#8b5cf6;font-family:-apple-system,BlinkMacSystemFont,Noto Sans KR,system-ui,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);min-height:100dvh}button{cursor:pointer;border:none;border-radius:8px;padding:12px 24px;font-size:1rem;font-weight:600;transition:opacity .2s}button:active{opacity:.8}button.primary{background:var(--color-accent);color:#fff}button.secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}button:disabled{opacity:.5;cursor:not-allowed}input{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-radius:8px;width:100%;padding:12px 16px;font-size:1rem}input:focus{border-color:var(--color-accent);outline:none}