:root{--paper: #f3f6f4;--card: #ffffff;--ink: #15302a;--muted: #62756f;--line: #d8e1dd;--teal: #0d5b4f;--teal-2: #13806e;--teal-soft: #dcefe9;--gold: #d99a14;--gold-soft: #fbefd2;--red: #c8423a;--red-soft: #f8e1de;--display: "Funnel Display", "Segoe UI", system-ui, sans-serif;--body: "Funnel Sans", "Segoe UI", system-ui, sans-serif;--mono: "IBM Plex Mono", ui-monospace, Menlo, monospace}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--paper: #0f1a17;--card: #172521;--ink: #e5efeb;--muted: #94a9a2;--line: #2a3b36;--teal: #4fc2aa;--teal-2: #6fd6bf;--teal-soft: #173a32;--gold: #f0b93f;--gold-soft: #3a2f14;--red: #f07a70;--red-soft: #3c1f1c;color-scheme:dark}}:root[data-theme=dark]{--paper: #0f1a17;--card: #172521;--ink: #e5efeb;--muted: #94a9a2;--line: #2a3b36;--teal: #4fc2aa;--teal-2: #6fd6bf;--teal-soft: #173a32;--gold: #f0b93f;--gold-soft: #3a2f14;--red: #f07a70;--red-soft: #3c1f1c;color-scheme:dark}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}[hidden]{display:none!important}html,body{height:100%}body{margin:0;background:var(--paper);color:var(--ink);font:500 16px/1.55 var(--body)}.back{display:inline-flex;align-items:center;gap:6px;padding-top:18px;color:var(--muted);font-weight:600;font-size:.9rem;text-decoration:none}.back:hover{color:var(--teal)}.app{max-width:600px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid var(--gold);outline-offset:2px}.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;border:0;border-radius:12px;padding:15px 18px;background:var(--teal);color:var(--card);font-weight:700;font-size:1.02rem;text-decoration:none;transition:background .15s,transform .1s}.btn:hover:not(:disabled){background:var(--teal-2)}.btn:active:not(:disabled){transform:scale(.985)}.btn:disabled{background:var(--line);color:var(--muted);cursor:default}.btn.red{background:var(--red)}.btn .arr{font-family:var(--mono)}.head{padding-block:26px 6px;display:grid;gap:4px}.eyebrow{font:600 .74rem/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}.head h1{font:800 2rem/1.05 var(--display);margin:4px 0 0;text-wrap:balance}.wallet{margin-top:18px;background:var(--ink);color:var(--paper);border-radius:16px;padding:16px 18px;display:grid;gap:2px;position:relative;overflow:hidden}.wallet .lbl{font:600 .72rem var(--mono);letter-spacing:.1em;text-transform:uppercase;opacity:.7}.wallet .amt{font:600 2rem/1.1 var(--mono);font-variant-numeric:tabular-nums}.wallet .sub{font-size:.86rem;opacity:.75}.wallet .vs{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:12px;padding-top:12px;border-top:1px dashed currentColor;position:relative;z-index:1}.wallet .vs>div{display:grid;gap:2px}.wallet .vs .v{font:600 1.1rem var(--mono);font-variant-numeric:tabular-nums}.wallet .vs .v.plus{text-decoration:underline 3px var(--gold);text-underline-offset:5px}.wallet .sub{position:relative;z-index:1}.wallet svg{position:absolute;right:-6px;bottom:-4px;width:150px;height:80px;opacity:.35}.chart{margin-top:26px;display:grid;gap:10px;position:relative;padding-bottom:20px}@media(max-width:520px){.row{grid-template-columns:1fr;gap:4px}.row .n{text-align:left}}.mod-head{display:grid;grid-template-columns:1fr auto;align-items:end;gap:2px 10px;margin-top:6px}.mod-head .skip-btn{grid-column:1 / -1;justify-self:start;margin-top:6px}.skip-btn{background:none;border:1px solid var(--line);border-radius:999px;padding:4px 12px;font-size:.8rem;font-weight:600;color:var(--muted)}.skip-btn:hover{border-color:var(--teal);color:var(--teal)}.tabs{display:flex;gap:8px;overflow-x:auto;margin-top:22px;padding-bottom:4px;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}.tab{flex:none;display:grid;grid-template-columns:auto auto;grid-template-rows:auto auto;column-gap:8px;align-items:center;text-align:left;border:1.5px solid var(--line);background:var(--card);border-radius:12px;padding:8px 14px 8px 10px}.tab-n{grid-row:1 / 3;font:800 1.3rem/1 var(--display);color:var(--muted)}.tab-t{font-weight:700;font-size:.92rem}.tab-p{font:600 .7rem var(--mono);color:var(--muted)}.tab[aria-selected=true]{border-color:var(--teal);background:var(--teal-soft)}.tab[aria-selected=true] .tab-n{color:var(--teal)}.tabs-note{color:var(--muted);font-size:.84rem;margin:10px 0 0}.row.todo .bar{background:var(--card);border:1px solid var(--line);color:var(--ink)}.row.skipped .bar{background:var(--paper);border:1px dashed var(--line);color:var(--muted)}.row.skipped .tag{color:var(--muted);background:var(--line)}.mod-head.sep{margin-top:22px;padding-top:22px;border-top:1px dashed var(--line)}.mod-head .eyebrow{grid-column:1 / -1}.mod-head h2{margin:0;font:800 1.3rem/1.15 var(--display);text-wrap:balance}.mod-prog{font:600 .76rem var(--mono);color:var(--muted);white-space:nowrap}.chart .axis{display:flex;justify-content:space-between;font:500 .7rem var(--mono);color:var(--muted);padding-left:70px;letter-spacing:.04em}.row{display:grid;grid-template-columns:62px 1fr;gap:8px;align-items:center;width:100%;text-align:left;background:none;border:0;padding:0}.row .n{font:600 .78rem var(--mono);color:var(--muted);text-align:right;padding-right:2px}.row .track{position:relative;display:flex;align-items:center;min-width:0}.row .bar{min-height:60px;border-radius:4px 12px 12px 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var(--gold)}.foot-note{color:var(--muted);font-size:.82rem;text-align:center;padding-bottom:28px}.foot-note button{background:none;border:0;color:var(--teal);text-decoration:underline;text-underline-offset:3px;padding:4px;font-weight:600}.lesson{flex:1;display:flex;flex-direction:column}.lbar{position:sticky;top:env(safe-area-inset-top,0px);z-index:4;background:var(--paper);display:flex;align-items:center;gap:12px;padding-block:14px 12px}.x{width:34px;height:34px;border:1px solid var(--line);border-radius:10px;background:var(--card);display:grid;place-items:center;padding:0;color:var(--muted)}.x svg{width:16px;height:16px}.lbar{flex-wrap:wrap}.tools{flex-basis:100%;display:flex;gap:8px;justify-content:space-between}.tool{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:5px 12px;font-weight:600;font-size:.86rem;color:var(--ink)}.tool:hover:not(:disabled){border-color:var(--teal);color:var(--teal)}.tool:disabled{opacity:.45;cursor:default}.tool svg{width:15px;height:15px}.sheet{position:fixed;inset:0;z-index:20;background:var(--paper);overflow-y:auto;overscroll-behavior:contain;animation:sheetin .2s ease-out}@keyframes sheetin{0%{transform:translateY(16px);opacity:0}}.sheet-in{max-width:600px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-bottom:calc(28px + env(safe-area-inset-bottom,0px))}.sheet-head{position:sticky;top:0;z-index:2;background:var(--paper);display:flex;align-items:center;gap:10px;padding-block:calc(14px + env(safe-area-inset-top,0px)) 12px;border-bottom:1px solid var(--line);margin-bottom:16px}.sheet-head .t{flex:1;font:600 .74rem/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}.mine{font:600 .74rem var(--mono);letter-spacing:.06em;text-transform:uppercase;margin-left:auto;padding-left:8px;white-space:nowrap}.sheet .opt.is-wrong{text-decoration:none}.sheet .opt.is-wrong>span:nth-child(2){text-decoration:line-through;text-decoration-color:var(--red)}.report-link{align-self:center;background:none;border:0;color:var(--muted);font-size:.84rem;text-decoration:underline;text-underline-offset:3px;padding:6px}.report-link:hover{color:var(--teal)}.report-form fieldset{border:0;padding:0;margin:0;display:grid;gap:8px}.report-form .rk{display:flex;gap:10px;align-items:center;font-weight:600;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--paper);cursor:pointer}.report-form textarea{width:100%;font:inherit;color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;resize:vertical}.report-form .rhp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}.rstatus{margin:0;color:var(--muted);font-size:.9rem}.sheet-nav{display:flex;gap:8px;justify-content:space-between;margin-top:16px}.slots{flex:1;display:flex;gap:6px;align-items:center;flex-wrap:wrap}.slot{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);background:var(--card);transition:background .2s,border-color .2s}.slot.cur{border-color:var(--teal)}.slot.ok{background:var(--gold);border-color:var(--gold)}.slot.miss{border-color:var(--red);background:var(--red-soft)}.slot.fixed{background:var(--gold);border-color:var(--red)}.step-lbl{font:600 .74rem var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.mini-bal{font:600 .9rem var(--mono);color:var(--ink);position:relative;white-space:nowrap}.pop{position:absolute;right:0;top:-2px;font:600 .8rem var(--mono);color:var(--gold);animation:pop 1.1s ease-out forwards;pointer-events:none}@keyframes pop{0%{transform:translateY(10px);opacity:0}25%{opacity:1}to{transform:translateY(-22px);opacity:0}}.readline{position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--line)}.readline i{display:block;height:100%;width:0;background:var(--teal)}.stage{flex:1;padding-block:8px 28px;display:flex;flex-direction:column;gap:16px}.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px 18px;display:grid;gap:16px}.kicker{font:600 .74rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--teal)}.kicker.again{color:var(--red)}.kicker-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.star{font:700 .74rem var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--gold);background:var(--gold-soft);border-radius:6px;padding:3px 8px}.q{font:700 1.3rem/1.3 var(--display);margin:0;text-wrap:pretty}.opts{display:grid;gap:10px}.opt{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:center;width:100%;text-align:left;background:var(--paper);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;font-weight:600;transition:border-color .12s,background .12s}.opt .k{font:600 .8rem var(--mono);width:30px;height:30px;border-radius:8px;border:1.5px solid var(--line);display:grid;place-items:center;color:var(--muted);background:var(--card)}.opt:hover:not(:disabled){border-color:var(--teal)}.opt[aria-pressed=true]{border-color:var(--teal);background:var(--teal-soft)}.opt[aria-pressed=true] .k{background:var(--teal);border-color:var(--teal);color:var(--card)}.opt.is-right{border-color:var(--teal);background:var(--teal-soft)}.opt.is-right .k{background:var(--teal);border-color:var(--teal);color:var(--card)}.opt.is-wrong{border-color:var(--red);background:var(--red-soft);text-decoration:line-through;text-decoration-color:var(--red)}.opt.is-wrong .k{background:var(--red);border-color:var(--red);color:var(--card)}.opt:disabled{cursor:default}.opts.tf{grid-template-columns:1fr 1fr}.opts.tf .opt{grid-template-columns:1fr;text-align:center;padding-block:20px;font:700 1.1rem var(--display)}.opts.tf .opt .k{display:none}.sentence{font:700 1.25rem/2.2 var(--display);margin:0}.blank{display:inline-flex;min-width:7.5em;min-height:1.9em;vertical-align:middle;border-bottom:2px dashed var(--muted);justify-content:center;margin:0 4px}.blank.filled{border-bottom-color:transparent}.tiles{display:flex;flex-wrap:wrap;gap:8px}.tile{border:1.5px solid var(--line);background:var(--paper);border-radius:999px;padding:6px 14px;font:600 .95rem var(--body);line-height:1.4}.tile.used{opacity:.25;pointer-events:none}.tile.r{border-color:var(--teal);background:var(--teal-soft);color:var(--teal)}.tile.w{border-color:var(--red);background:var(--red-soft);color:var(--red)}.stamp{position:absolute;right:14px;top:-14px;font:800 1.05rem/1 var(--display);letter-spacing:.14em;padding:8px 12px;border:3px double currentColor;border-radius:8px;transform:rotate(-9deg);background:var(--card);animation:stamp .28s cubic-bezier(.2,1.6,.5,1) both}.stamp.ok{color:var(--teal)}.stamp.no{color:var(--red)}@keyframes stamp{0%{transform:rotate(-9deg) scale(1.9);opacity:0}}.why{border-top:1px dashed var(--line);padding-top:14px;display:grid;gap:4px;animation:fade .25s ease-out}.why b{font:600 .74rem var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}.why .ans{font-weight:700;color:var(--red)}.why p{margin:0}@keyframes fade{0%{opacity:0;transform:translateY(6px)}}.lesson-no{font:800 4.6rem/.9 var(--display);color:var(--teal);letter-spacing:-.03em}.intro-t{font:800 1.6rem/1.15 var(--display);margin:0;text-wrap:balance}.intro-p{font-size:1.1rem;margin:0}.meta{display:flex;gap:14px;flex-wrap:wrap;font:500 .82rem var(--mono);color:var(--muted)}.article{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px 18px 8px}.article .src{font:600 .74rem/1.5 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-bottom:14px;margin-bottom:18px;border-bottom:1px dashed var(--line)}.article .at{font:800 1.45rem/1.15 var(--display);margin:6px 0 4px;text-wrap:balance}.prose{font-size:1.04rem;line-height:1.7;max-width:65ch}.prose h2{font:700 1.2rem/1.25 var(--display);margin:1.6em 0 .5em;text-wrap:balance}.prose p{margin:0 0 1em}.prose ul{padding-left:1.2em;margin:0 0 1em}.prose li{margin-bottom:.35em}.prose a{color:var(--teal);text-underline-offset:3px}.prose hr{border:0;border-top:1px dashed var(--line);margin:1.6em 0}.prose blockquote{margin:0 0 1em;padding:10px 14px;border-left:3px solid var(--gold);background:var(--gold-soft);border-radius:0 10px 10px 0}.prose blockquote p:last-child{margin:0}.tw{overflow-x:auto;margin:0 0 1.2em;border:1px solid var(--line);border-radius:10px}.prose table{border-collapse:collapse;width:100%;font-size:.9rem;font-variant-numeric:tabular-nums}.prose th,.prose td{padding:8px 10px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}.prose th{font-weight:700;background:var(--paper)}.prose tr:last-child td{border-bottom:0}.bottom{position:sticky;bottom:0;z-index:4;background:var(--paper);padding-block:12px calc(16px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line)}.receipt{margin:26px auto 0;width:100%;max-width:380px;background:var(--card);border:1px solid var(--line);border-bottom:0;padding:24px 20px 30px;position:relative;font-family:var(--mono);font-size:.9rem}.receipt:after{content:"";position:absolute;left:-1px;right:-1px;bottom:-12px;height:12px;background:radial-gradient(circle at 8px -2px,transparent 8px,var(--card) 8.5px) 0 0 / 16px 12px repeat-x}.receipt h2{font:800 1.5rem/1.1 var(--display);margin:6px 0 2px;text-align:center}.receipt .c{text-align:center;color:var(--muted);font-size:.76rem;letter-spacing:.1em;text-transform:uppercase}.receipt dl{margin:18px 0 0;display:grid;gap:8px}.receipt .ln{display:flex;gap:6px;align-items:baseline}.receipt .ln dt{flex:none;color:var(--muted)}.receipt .ln i{flex:1;border-bottom:1px dotted var(--muted);transform:translateY(-4px)}.receipt .ln dd{margin:0;font-weight:600}.receipt .tot{border-top:1px dashed var(--line);margin-top:6px;padding-top:12px}.receipt .tot dd{color:var(--teal);font-size:1.05rem}.receipt .sig{margin-top:20px;text-align:center;color:var(--gold);font:800 .9rem var(--display);letter-spacing:.14em;border:3px double var(--gold);border-radius:8px;padding:6px 10px;display:inline-block;transform:rotate(-4deg)}.center{text-align:center}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}