*{box-sizing:border-box}body{margin:0}.pen-puzzle{--bg:#eef0f3;--paper:#fff;--ink:#1d2430;--muted:#68717f;--line:#d5dae2;--accent:#2f5fd0;--seal:#c8463a;--answer-bg:#eef3ff;--display:"Gowun Batang", "Nanum Myeongjo", serif;--body:"Gowun Dodum", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;--mono:"IBM Plex Mono", ui-monospace, monospace;background:var(--bg);min-height:100vh;color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.65}@media (prefers-color-scheme:dark){.pen-puzzle:not([data-theme=light]){--bg:#12161d;--paper:#1b212b;--ink:#e7ebf2;--muted:#98a1b0;--line:#2c3441;--accent:#7ea0ff;--seal:#e3685c;--answer-bg:#202a3d;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}}.pen-puzzle[data-theme=dark]{--bg:#12161d;--paper:#1b212b;--ink:#e7ebf2;--muted:#98a1b0;--line:#2c3441;--accent:#7ea0ff;--seal:#e3685c;--answer-bg:#202a3d;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}.pen-puzzle .wrap{flex-direction:column;gap:28px;max-width:620px;margin:0 auto;padding:40px 16px 64px;display:flex}.pen-puzzle header{flex-direction:column;gap:10px;display:flex}.pen-puzzle .eyebrow{font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--seal);font-size:12px}.pen-puzzle h1{font-family:var(--display);text-wrap:balance;margin:0;font-size:clamp(30px,8vw,42px);line-height:1.2}.pen-puzzle .intro{color:var(--muted);margin:0}.pen-puzzle .progress{font-family:var(--mono);color:var(--muted);font-variant-numeric:tabular-nums;font-size:13px}.pen-puzzle ol{flex-direction:column;gap:14px;margin:0;padding:0;list-style:none;display:flex}.pen-puzzle .clue{background:var(--paper);border:1px solid var(--line);border-radius:10px;flex-direction:column;gap:12px;padding:18px 18px 18px 64px;display:flex;position:relative}.pen-puzzle .num{width:34px;height:34px;font-family:var(--mono);border:1.5px solid var(--line);color:var(--muted);border-radius:50%;place-items:center;font-size:14px;display:grid;position:absolute;top:16px;left:16px}.pen-puzzle .clue.open .num{border-color:var(--accent);color:var(--accent)}.pen-puzzle .clue.solved .num{background:var(--accent);border-color:var(--accent);color:var(--paper)}.pen-puzzle .q{font-family:var(--display);margin:0;font-size:19px;font-weight:700;line-height:1.45}.pen-puzzle .clue.locked{opacity:.55}.pen-puzzle .clue.locked .q{filter:blur(5px);-webkit-user-select:none;user-select:none}.pen-puzzle .lockmsg{color:var(--muted);margin:0;font-size:14px}.pen-puzzle button{font-family:var(--body);cursor:pointer;border:1.5px solid var(--accent);color:var(--accent);background:0 0;border-radius:8px;align-self:flex-start;padding:9px 16px;font-size:15px}.pen-puzzle button:hover{background:var(--answer-bg)}.pen-puzzle button:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.pen-puzzle .a{background:var(--answer-bg);border-radius:8px;margin:0;padding:12px 14px;animation:.45s ease-out pen-puzzle-unfold}.pen-puzzle .a strong{font-family:var(--mono);letter-spacing:.1em;color:var(--accent);margin-bottom:2px;font-size:12px;display:block}@keyframes pen-puzzle-unfold{0%{clip-path:inset(0 0 100%)}to{clip-path:inset(0)}}.pen-puzzle .final{background:var(--paper);border:1.5px dashed var(--seal);text-align:center;border-radius:10px;flex-direction:column;gap:6px;padding:22px 18px;animation:.6s ease-out pen-puzzle-unfold;display:flex}.pen-puzzle .final p{margin:0}.pen-puzzle .final .big{font-family:var(--display);color:var(--seal);font-size:26px;font-weight:700}.pen-puzzle .reset{border-color:var(--line);color:var(--muted);align-self:center;padding:6px 12px;font-size:13px}@media (prefers-reduced-motion:reduce){.pen-puzzle .a,.pen-puzzle .final{animation:none}}