@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.invisible{visibility:hidden}.visible{visibility:visible}.fixed{position:fixed}.relative{position:relative}.static{position:static}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.flex{display:flex}.hidden{display:none}.table{display:table}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}}:root{--ink:#203d35;--green:#17594c;--paper:#f7f8f2;--muted:#67776f;--lime:#dced9d;--line:#dfe7de}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:Arial,Helvetica,sans-serif;font-size:17px;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.65;cursor:wait}:focus-visible{outline-offset:4px;outline:3px solid #d18333}h1,h2,h3,p{margin:0}h1{letter-spacing:-1.8px;font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.12}h2{letter-spacing:-.6px;font-size:1.5rem;line-height:1.25}h3{font-size:1.1rem}p{overflow-wrap:anywhere}.header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;max-width:1160px;margin:auto;padding:28px 32px;display:flex}.brand{letter-spacing:-1px;align-items:center;gap:10px;font-size:26px;font-weight:900;display:flex}.brand-mark{background:var(--green);color:var(--lime);border-radius:13px;place-items:center;width:38px;height:38px;display:grid}.brand-dot{color:#8da755}.header-link{align-items:center;gap:8px;min-height:44px;font-size:14px;font-weight:700;display:flex}.container{max-width:1120px;margin:0 auto;padding:56px 24px 30px}.narrow{max-width:660px}.footer{text-align:center;color:var(--muted);padding:36px 20px;font-size:14px}.stack{flex-direction:column;gap:20px;display:flex}.gap-sm{gap:10px}.card{border:1px solid var(--line);background:#fff;border-radius:24px;padding:28px}.card h2,.card h3{margin-bottom:12px}.card p+.button{margin-top:20px}.muted{color:var(--muted);font-size:16px}.eyebrow{letter-spacing:2px;text-transform:uppercase;color:var(--green);font-size:12px;font-weight:800}.button{background:var(--green);color:#fff;text-align:center;border:0;border-radius:15px;justify-content:center;align-items:center;gap:10px;min-height:54px;padding:14px 22px;font-weight:700;transition:transform .15s,background .15s;display:inline-flex}.button:hover{background:#214d42;transform:translateY(-1px)}.secondary{color:var(--green);background:#eef2e5;border:1px solid #dce5cc}.secondary:hover{background:#e1e9d5}.row{justify-content:space-between;align-items:center;gap:16px;display:flex}.wrap{flex-wrap:wrap}.intro{gap:14px;margin-bottom:32px;display:grid}label{flex-direction:column;gap:8px;font-weight:600;display:flex}input,select,textarea{width:100%;min-height:54px;color:var(--ink);background:#fff;border:1px solid #cbd8cc;border-radius:13px;padding:12px 14px}textarea{resize:vertical;min-height:120px}.notice{color:#7a4a12;background:#fff3df;border-radius:13px;padding:14px;font-size:15px}.notice.success{color:var(--green);background:#edf4df}.pair-code{letter-spacing:8px;text-align:center;background:#eef4e3;border-radius:20px;padding:20px;font-size:46px;font-weight:800}.code-input{text-align:center;letter-spacing:8px;font-size:30px}.bottom-nav{border:1px solid var(--line);width:min(94%,580px);padding:12px 8px max(12px, env(safe-area-inset-bottom));z-index:5;background:#fff;border-radius:22px;justify-content:space-around;display:flex;position:fixed;bottom:16px;left:50%;transform:translate(-50%);box-shadow:0 5px 30px #213d3512}.bottom-nav a{min-width:64px;color:var(--muted);flex-direction:column;align-items:center;gap:5px;padding:6px;font-size:13px;font-weight:700;display:flex}.bottom-nav a[aria-current]{color:var(--green);background:#edf4df;border-radius:13px}.student-space{padding-bottom:100px}.progress-block{gap:12px;display:grid}progress{border:0;border-radius:10px;width:100%;height:9px;overflow:hidden}progress::-webkit-progress-bar{background:#e8ecdf}progress::-webkit-progress-value{background:#779752;border-radius:10px}.pill{color:var(--green);background:#edf4df;border-radius:99px;align-items:center;gap:6px;padding:7px 12px;font-size:13px;font-weight:700;display:inline-flex}.hero{grid-template-columns:1.08fr 1fr;align-items:center;gap:72px;padding:26px 0 65px;display:grid}.hero h1{letter-spacing:-3.5px;font-size:clamp(3rem,6vw,4.7rem);line-height:1.03}.hero h1 em{color:#82954f;font-style:normal}.hero-copy{max-width:450px;color:var(--muted);font-size:18px;line-height:1.7}.hero .stack{gap:26px}.hero-scene{background:#e8eedb;border-radius:160px 160px 40px 40px;min-height:460px;padding:35px 22px 80px;position:relative}.sample-card{background:#fff;border:1px solid #e0e6d8;border-radius:26px;margin:24px 12px;padding:28px;transform:rotate(-3deg);box-shadow:0 16px 40px #344d2910}.sample-task{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:18px 0;display:flex}.sample-icon{background:#f4e8cf;border-radius:13px;place-items:center;padding:12px;display:grid}.sample-done{width:25px;height:25px;color:var(--green);background:#dcebb6;border-radius:50%;place-items:center;margin-left:auto;display:grid}.floating-note{background:var(--green);color:#fff;border-radius:20px;max-width:270px;padding:20px 24px;position:absolute;bottom:9px;right:0;transform:rotate(3deg);box-shadow:0 12px 25px #17594c20}.floating-note .muted{color:#d6e5d7;font-size:13px}.mini-label{background:#f7d99a;border-radius:12px;padding:9px 16px;font-size:13px;font-weight:700;position:absolute;top:8px;right:14px;transform:rotate(8deg)}.features{border-top:1px solid var(--line);grid-template-columns:repeat(3,1fr);gap:22px;padding:32px 0;display:grid}.feature{gap:14px;display:flex}.feature-number{color:#789153;margin-top:4px;font-size:14px;font-weight:700}.feature p{color:var(--muted);margin-top:5px;font-size:14px}.task-card{border-left:5px solid #c4d487}.task-card.completed{border-left-color:var(--green);background:#f3f7ec}.stat{font-size:32px;font-weight:700;line-height:1.2}.grid-2{grid-template-columns:1fr 1fr;gap:16px;display:grid}.text-link{text-underline-offset:4px;align-items:center;min-height:44px;font-weight:600;text-decoration:underline;display:inline-flex}.skip{position:absolute;top:-100px}.skip:focus{z-index:99;background:#fff;padding:12px;top:10px;left:10px}.soft{background:#edf2e3}.choice{align-items:center;gap:18px;min-height:100px;display:flex}.choice strong{font-size:21px}.choice-icon{background:#edf2e3;border-radius:18px;padding:16px}.small{font-size:14px}.top-space{margin-top:24px}@media (max-width:700px){.header{padding:18px 20px}.header-link{font-size:12px}.container{padding:34px 20px 24px}.hero{grid-template-columns:1fr;gap:36px;padding:8px 0 35px}.hero h1{font-size:3.5rem}.hero-scene{width:100%;max-width:440px;min-height:410px;margin:auto}.features{grid-template-columns:1fr;gap:25px}.card{padding:23px}.grid-2{gap:12px}.narrow h1{font-size:2.4rem}.sample-card{margin:12px 8px}.floating-note{bottom:0;right:3px}.pair-code{letter-spacing:6px;font-size:36px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}.barcode-preview{object-fit:cover;background:#203d35;border-radius:16px;width:100%;max-height:320px}.book-list{margin:24px 0 0;padding:0;list-style:none}.book-row{border-top:1px solid var(--line);overflow-wrap:anywhere;gap:16px;padding:20px 0;display:flex}.book-row>div{min-width:0}.book-cover{flex:0 0 48px;font-size:32px}