/* Beyond Code — the daily Python puzzle. Beyond's paper, dark code, one column that fits a phone; motion off for those
   who ask for less. */
:root{--paper:#f4efe9;--card:#fffdf9;--ink:#1b1916;--muted:#625d55;--faint:#9a948b;--line:rgba(27,25,22,.12);--acc:#e5532f;--ok:#1f9d55;--no:#d1344b;
 --code:#17151b;--code-ink:#f3eee6;--mono:'JetBrains Mono','IBM Plex Mono',ui-monospace,monospace;--serif:'Instrument Serif',Georgia,serif;--ease:cubic-bezier(.2,.7,.2,1)}
*{box-sizing:border-box}[hidden]{display:none!important}
html{background:var(--paper);color:var(--ink)}body{margin:0;min-height:100vh;font:16px/1.5 'DM Sans',system-ui,sans-serif;-webkit-font-smoothing:antialiased;
 background:radial-gradient(ellipse at 50% 0%,rgba(244,239,233,0) 30%,var(--paper) 80%),repeating-linear-gradient(0deg,rgba(27,25,22,.05) 0 1px,transparent 1px 40px),repeating-linear-gradient(90deg,rgba(27,25,22,.05) 0 1px,transparent 1px 40px),var(--paper)}
:focus-visible{outline:3px solid var(--acc);outline-offset:3px}
a{color:inherit}
.cbar{display:flex;align-items:center;gap:10px;max-width:640px;margin:0 auto;padding:16px 16px 0}
.brand{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font:28px/1 var(--serif)}
.brand i{width:22px;height:22px;border-radius:50%;background:var(--acc) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3.5 8.5 8.5 3.5M4.5 3.5h4v4'/%3E%3C/svg%3E") center/12px no-repeat}
.cname{font:600 13px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;background:var(--ink);color:var(--paper);padding:5px 8px;border-radius:6px}
.streak{margin-left:auto;font-weight:700;font-size:15px}
main{max-width:640px;margin:0 auto;padding:12px 16px 40px}
.loading{display:grid;place-items:center;min-height:50vh}.loading i{width:28px;height:28px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--acc);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.ssr-intro h1{font:400 40px/1.05 var(--serif);margin:24px 0 8px}.ssr-intro p{color:var(--muted)}
h1{font:400 clamp(38px,9vw,56px)/1.02 var(--serif);margin:18px 0 10px;letter-spacing:-.3px}h1 i{color:var(--acc)}
.kick{font:700 12px/1 'DM Sans';letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin:18px 0 0}
.lede{color:var(--muted);font-size:17px;margin:0 0 18px}
.steps{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:8px}.steps li{display:flex;gap:10px;align-items:baseline}.steps b{font:600 13px var(--mono);color:var(--acc)}
.btn{appearance:none;border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 17px/1 'DM Sans';padding:15px 22px;border-radius:999px;background:var(--ink);color:var(--paper);text-decoration:none;transition:transform .15s var(--ease)}
.btn:active{transform:scale(.97)}.btn.acc{background:var(--acc);color:#fff}.btn.alt{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}.btn.wide{width:100%}
.btn[disabled]{opacity:.45;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:14px;margin:10px 0 6px}
.dots{display:flex;gap:6px;margin-left:auto}.dots i{width:28px;height:6px;border-radius:3px;background:var(--line)}.dots i.on{background:var(--ink)}.dots i.ok{background:var(--ok)}.dots i.no{background:var(--no)}
.q{font:400 30px/1.1 var(--serif);margin:6px 0 12px}
pre.code{margin:0;background:var(--code);color:var(--code-ink);font:14.5px/1.55 var(--mono);padding:16px;border-radius:14px;overflow-x:auto;tab-size:4;white-space:pre}
.code .k{color:#ff8f6b}.code .s{color:#b5e48c}.code .n{color:#ffd166}.code .c{color:#8e8a99;font-style:italic}.code .f{color:#9ad1ff}
.opts{display:grid;gap:10px;margin:16px 0}
.opt{appearance:none;cursor:pointer;text-align:left;font:15px/1.4 var(--mono);white-space:pre-wrap;color:var(--ink);background:var(--card);border:1.5px solid var(--line);border-radius:12px;padding:13px 15px;transition:border-color .15s,background .15s,transform .15s var(--ease)}
.opt:hover{border-color:rgba(27,25,22,.35)}.opt:active{transform:scale(.99)}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,var(--card))}.opt.wrong{border-color:var(--no);background:color-mix(in srgb,var(--no) 9%,var(--card))}
.opt[disabled]{cursor:default}.opt.dim{opacity:.5}
.verdict{border-radius:14px;padding:14px 16px;margin:4px 0 6px;background:var(--card);border:1.5px solid var(--line)}
.verdict b{display:block;font-size:17px;margin-bottom:2px}.verdict.ok b{color:var(--ok)}.verdict.no b{color:var(--no)}.verdict p{margin:0;color:var(--muted)}
.watch{appearance:none;border:0;background:none;cursor:pointer;padding:8px 0;font:600 15px 'DM Sans';color:var(--acc);text-align:left}
.vid{position:relative;aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#000;margin:6px 0 4px}.vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.credit{font-size:13px;color:var(--faint);margin:0 0 10px}
.goal{background:var(--card);border:1.5px dashed var(--acc);border-radius:12px;padding:12px 14px;margin:10px 0 12px}.goal span{display:block;font:700 11px 'DM Sans';letter-spacing:.12em;text-transform:uppercase;color:var(--acc);margin-bottom:4px}
.goal pre{margin:0;font:15px/1.45 var(--mono);white-space:pre-wrap}
textarea.ed{width:100%;min-height:120px;resize:vertical;background:var(--code);color:var(--code-ink);font:14.5px/1.55 var(--mono);padding:16px;border-radius:14px;border:0;tab-size:4;white-space:pre;overflow-x:auto}
pre.out{margin:10px 0 0;min-height:48px;background:var(--card);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;font:14px/1.45 var(--mono);white-space:pre-wrap;color:var(--ink)}
pre.out .err{color:var(--no)}pre.out .note{color:var(--faint)}
.status{font-size:14px;color:var(--muted);margin:8px 0 0}
.result{text-align:center}.grid{font-size:44px;letter-spacing:6px;margin:12px 0 4px}.score{font:400 34px/1.1 var(--serif);margin:0 0 6px}
.next{color:var(--muted);font-size:15px;margin:6px 0 18px}
.lesson{display:block;text-align:left;text-decoration:none;background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:16px;margin:16px 0}
.lesson span{display:block;font:700 11px 'DM Sans';letter-spacing:.12em;text-transform:uppercase;color:var(--acc)}.lesson b{display:block;font-size:18px;margin:4px 0 2px}.lesson em{font-style:normal;color:var(--muted);font-size:14px}
.past{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:8px 0 0}.past a{font:600 14px var(--mono);text-decoration:none;padding:8px 12px;border-radius:10px;background:var(--card);border:1.5px solid var(--line)}.past a.done{border-color:var(--ok)}
.note{color:var(--faint);font-size:13px;margin:28px 0 0}
.best{text-align:center;color:var(--muted);margin:10px 0 0}.keys{text-align:center}@media (pointer:coarse){.keys{display:none}}
.hud{display:flex;align-items:baseline;justify-content:space-between;margin:6px 0 8px}.hud .sc{font:400 56px/1 var(--serif)}.hud .bt{color:var(--muted);font:600 14px var(--mono)}
.timer{height:6px;border-radius:3px;background:var(--line);overflow:hidden;margin:0 0 12px}.timer i{display:block;height:100%;width:100%;background:var(--acc)}
.opt kbd{display:inline-block;min-width:1.6em;margin-right:10px;font:600 12px var(--mono);color:var(--faint);border:1px solid var(--line);border-radius:5px;text-align:center;padding:1px 0;vertical-align:1px}
@media (pointer:coarse){.opt kbd{display:none}}
.big{font:400 110px/1 var(--serif);margin:4px 0}.missed{margin:22px 0 0}.missed .q{font-size:24px}.verdict code{font:inherit;font-family:var(--mono);background:color-mix(in srgb,var(--no) 10%,transparent);padding:0 4px;border-radius:4px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);opacity:0;background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:999px;font-weight:600;transition:.25s var(--ease);pointer-events:none}.toast.on{opacity:1;transform:translateX(-50%)}
.pop{animation:pop .35s var(--ease)}@keyframes pop{from{transform:scale(.96);opacity:.4}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}