@layer theme{:root,:host{--font-sans:ui-sans-serif,system-ui,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,ui-sans-serif,system-ui,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{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{.absolute{position:absolute}.contents{display:contents}.hidden{display:none}.lowercase{text-transform:lowercase}}:root{--ink:#17211d;--muted:#627069;--surface:#fff;--soft:#f2f6f3;--line:#dbe5de;--green:#24784d;--green-dark:#165536;--yellow:#f4b942}*{box-sizing:border-box}html{background:var(--soft);color:var(--ink)}body{background:radial-gradient(circle at 12% 0%,#f4b94224,transparent 26rem),linear-gradient(180deg,#f8fbf9 0%,var(--soft)100%);min-height:100vh;margin:0;font-family:Arial,Helvetica,sans-serif}a{color:inherit}button,input{font:inherit}.shell{width:min(1120px,100% - 32px);margin:0 auto}.topbar{z-index:10;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f8fbf9eb;border-bottom:1px solid #dbe5dee6;position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:20px;min-height:68px;display:flex}.brand{align-items:center;gap:11px;font-weight:800;text-decoration:none;display:flex}.brand-mark{background:var(--green);color:#fff;border-radius:10px;place-items:center;width:31px;height:31px;display:grid}.viewer{color:var(--muted);font-size:.88rem}.page{padding:56px 0 72px}.eyebrow{color:var(--green);letter-spacing:.12em;text-transform:uppercase;font-size:.76rem;font-weight:800}h1{letter-spacing:-.045em;margin:10px 0 12px;font-size:clamp(2.15rem,5vw,4.5rem);line-height:.98}.lede{max-width:680px;color:var(--muted);margin:0;font-size:1.08rem;line-height:1.65}.toolbar{align-items:center;gap:14px;margin:36px 0 22px;display:flex}.search{border:1px solid var(--line);background:var(--surface);width:min(460px,100%);color:var(--ink);border-radius:14px;padding:13px 15px;box-shadow:0 8px 30px #18402b0a}.search:focus{border-color:var(--green);outline:3px solid #24784d2b}.lesson-grid{gap:13px;display:grid}.lesson-card{border:1px solid var(--line);background:var(--surface);border-radius:18px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:22px;padding:23px;text-decoration:none;transition:transform .15s,border-color .15s;display:grid;box-shadow:0 8px 28px #18402b0a}.lesson-card:hover{border-color:#aec9b7;transform:translateY(-2px)}.lesson-title{margin:5px 0 9px;font-size:1.13rem;line-height:1.35}.metadata{color:var(--muted);flex-wrap:wrap;gap:8px 14px;font-size:.82rem;display:flex}.sha{color:var(--green-dark);background:#edf4ef;border-radius:7px;padding:3px 7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.arrow{color:var(--green);font-size:1.35rem}.empty{text-align:center;color:var(--muted);background:#ffffff8c;border:1px dashed #b9c9be;border-radius:18px;padding:48px 24px}.back{color:var(--green-dark);margin-bottom:24px;font-weight:700;text-decoration:none;display:inline-flex}.lesson-heading h1{max-width:900px;font-size:clamp(2rem,4vw,3.4rem)}.lesson-actions{flex-wrap:wrap;gap:12px;margin-top:18px;display:flex}.button{background:var(--green);color:#fff;cursor:pointer;border:0;border-radius:12px;justify-content:center;align-items:center;gap:10px;padding:11px 16px;font-weight:750;text-decoration:none;transition:background .15s,border-color .15s,box-shadow .15s,transform .15s;display:inline-flex}.button:hover{background:var(--green-dark)}.button:focus-visible{outline-offset:2px;outline:3px solid #24784d33}.button:disabled{cursor:wait;opacity:.65}.button.secondary{color:var(--green-dark);background:#e7f1ea}.lesson-frame{border:1px solid var(--line);background:#fff;border-radius:18px;width:100%;min-height:82vh;margin-top:28px;box-shadow:0 18px 50px #18402b17}.auth-wrap{place-items:center;min-height:calc(100vh - 69px);padding:40px 24px;display:grid}.auth-card{border:1px solid var(--line);background:#fffffff7;border-radius:22px;width:min(460px,100%);padding:32px;box-shadow:0 22px 60px #18402b17}.auth-card-header{align-items:center;gap:15px;display:flex}.auth-lock{width:44px;height:44px;color:var(--green-dark);background:#e7f1ea;border-radius:14px;flex:0 0 44px;place-items:center;display:grid}.auth-lock svg{stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:23px;height:23px}.auth-card h1{letter-spacing:-.035em;margin:3px 0 0;font-size:2rem}.auth-card .eyebrow{font-size:.7rem}.auth-intro{color:var(--muted);margin:19px 0 24px;line-height:1.55}.auth-provider-button{border:1px solid var(--line);width:100%;min-height:48px;color:var(--ink);background:#fff;box-shadow:0 2px 8px #18402b0a}.auth-provider-button:hover{background:#f8fbf9;border-color:#b8cbbf}.google-mark{flex:0 0 19px;width:19px;height:19px}.auth-form{gap:16px;display:grid}.field{color:var(--ink);gap:7px;font-size:.86rem;font-weight:700;display:grid}.field input{width:100%;min-height:47px;color:var(--ink);background:#fbfdfc;border:1px solid #cedbd2;border-radius:11px;padding:11px 13px;font-weight:500;transition:border-color .15s,box-shadow .15s,background .15s}.field input::placeholder{color:#98a49e}.field input:focus{border-color:var(--green);background:#fff;outline:none;box-shadow:0 0 0 3px #24784d1f}.auth-submit{width:100%;min-height:48px;margin-top:2px}.divider{color:#8a958f;align-items:center;gap:12px;margin:22px 0;font-size:.78rem;display:flex}.divider:before,.divider:after{content:"";background:var(--line);flex:1;height:1px}.error{color:#a12929;background:#fff0f0;border-radius:9px;padding:10px 12px;font-size:.84rem;line-height:1.4}@media (max-width:680px){.shell{width:min(100% - 22px,1120px)}.page{padding-top:38px}.lesson-card{grid-template-columns:1fr auto;gap:10px;padding:18px}.viewer{display:none}.lesson-frame{border-radius:11px;min-height:78vh}.auth-wrap{align-items:start;padding:22px 14px 40px}.auth-card{border-radius:18px;padding:24px 20px}.auth-card h1{font-size:1.8rem}}