:root{color-scheme:light dark;--bg: #ffffff;--fg: #1a1a1a;--fg-dim: #6b6b6b;--line: #e2e2e2;--panel: #f6f6f6;--accent: #2f6fed;--accent-fg: #ffffff;--ok: #1f8a4c;--warn: #b4261a;--font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, monospace;--display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--card-from: #2f6fed;--card-to: #7b3fe4;--radius: 8px;--gutter: 16px;--measure: 36rem}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #121212;--fg: #ececec;--fg-dim: #9a9a9a;--line: #2c2c2c;--panel: #1c1c1c;--accent: #6f9bff;--accent-fg: #0b1430;--ok: #5fcf8a;--warn: #ff7b6e}}:root[data-theme=dark]{--bg: #121212;--fg: #ececec;--fg-dim: #9a9a9a;--line: #2c2c2c;--panel: #1c1c1c;--accent: #6f9bff;--accent-fg: #0b1430;--ok: #5fcf8a;--warn: #ff7b6e}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);font-size:17px;line-height:1.5;color:var(--fg);background:var(--bg);-webkit-text-size-adjust:100%}a{color:inherit}.shell{min-height:100dvh;display:flex;flex-direction:column;width:100%;max-width:var(--measure);margin:0 auto;padding:0 var(--gutter);padding-bottom:env(safe-area-inset-bottom)}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line)}.header__title{margin:0;font-size:1.25rem;font-weight:700;letter-spacing:.02em}.header__actions{display:flex;gap:8px}.icon-button{width:40px;height:40px;border:1px solid var(--line);border-radius:50%;background:var(--panel);color:var(--fg);font:inherit;font-size:1.1rem;line-height:1;cursor:pointer}.toolbar{display:flex;justify-content:flex-end;padding:12px 0 8px}.link-button{padding:4px 0;border:0;background:none;color:var(--accent);font:inherit;font-size:.95rem;text-decoration:underline;text-underline-offset:3px;cursor:pointer}.main{flex:1;padding:0 0 24px}.footer{padding:16px 0 24px;border-top:1px solid var(--line);color:var(--fg-dim);font-size:.9rem}.footer p{margin:0}.button{min-height:44px;padding:0 18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--fg);font:inherit;font-weight:600;cursor:pointer}.button--primary{border-color:var(--accent);background:var(--accent);color:var(--accent-fg)}.button:disabled{opacity:.5;cursor:default}.panel{display:flex;flex-direction:column;gap:20px}.panel h2{margin:0;font-size:1.2rem}.help{width:min(100% - 2 * var(--gutter),32rem);max-height:calc(100dvh - 2 * var(--gutter));margin:auto;padding:0;overflow-y:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);color:var(--fg);box-shadow:0 20px 60px #0000004d}.help::backdrop{background:#00000080}.help__body{display:flex;flex-direction:column;gap:16px;padding:20px}.help__body p{margin:0}.help__head{display:flex;align-items:center;justify-content:space-between}.help__head h2{margin:0;font-size:1.2rem}.puzzle{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);text-align:center}.puzzle__number{color:var(--fg-dim);font-size:.85rem;letter-spacing:.06em;text-transform:uppercase}.puzzle__pair{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:4px 14px;margin:0}.puzzle__word{font-size:2rem;font-weight:800;line-height:1.2;letter-spacing:-.01em}.puzzle__word--start{color:var(--fg)}.puzzle__word--target{color:var(--accent)}.puzzle__arrow{color:var(--fg-dim);font-size:1.4rem}.lead{margin:0}.lead--dim{color:var(--fg-dim)}.chain{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.chain__row{display:flex;justify-content:space-between;gap:12px;padding:10px 14px;border-top:1px solid var(--line)}.chain__row:first-child{border-top:0}.chain__pair{color:var(--fg-dim)}.chain__before{color:var(--fg)}.chain__result{font-weight:700;color:var(--accent)}.move{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center}.move__holding{grid-column:1 / -1;font-weight:700;font-size:1.2rem}.move__input{min-height:48px;padding:0 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);color:var(--fg);font:inherit;font-size:18px}.move__input:focus{outline:2px solid var(--accent);outline-offset:1px}.flash{margin:0;padding:10px 14px;border-radius:var(--radius);background:var(--panel)}.flash--refusal{color:var(--fg-dim)}.flash--error{color:var(--warn)}.flash--note{color:var(--fg-dim)}.result{display:flex;flex-direction:column;gap:4px}.share{display:flex;flex-direction:column;gap:12px}.card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:24px 20px;border-radius:14px;background:linear-gradient(135deg,var(--card-from),var(--card-to));color:#fff;text-align:center;text-shadow:0 1px 2px rgb(0 0 0 / .25);box-shadow:0 12px 32px #0000002e}.card p{margin:0}.card__title{font-family:var(--display);font-size:1.25rem;font-weight:600;letter-spacing:.01em;white-space:pre-wrap}.card__score{font-family:var(--display);font-size:2rem;font-weight:700;line-height:1.2}.card__host{font-size:.9rem;opacity:.85;letter-spacing:.04em}