/*! tailwindcss v4.2.1 | MIT License | https://tailwindcss.com */
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-outline-style:solid}}}@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;--spacing:.25rem;--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{.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.relative{position:relative}.start{inset-inline-start:var(--spacing)}.end{inset-inline-end:var(--spacing)}.block{display:block}.hidden{display:none}.table{display:table}.rounded{border-radius:.25rem}.outline{outline-style:var(--tw-outline-style);outline-width:1px}}:root{--ink:#17221d;--muted:#68736c;--paper:#f7f5ee;--card:#fffefa;--line:#dedfd7;--lime:#c9f45b;--lime-dark:#a9d943;--mint:#dff6e7;--coral:#ff765f;--coral-soft:#fff0eb;--navy:#193c34;--white:#fff;--shadow:0 24px 70px #1c2e261c}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);min-height:100vh;color:var(--ink);font-family:var(--font-geist-sans), Arial, sans-serif;margin:0}button,input,textarea,select{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline-offset:3px;outline:3px solid #193c3459}label:has(input:focus-visible){outline-offset:3px;outline:3px solid #193c3459}label:has(select:focus-visible){outline-offset:3px;outline:3px solid #193c3459}button{color:inherit}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.home-shell,.app-shell{min-height:100vh}.topbar,.app-header{justify-content:space-between;align-items:center;width:min(1180px,100% - 40px);height:84px;margin:0 auto;display:flex}.brand{letter-spacing:-.04em;cursor:pointer;background:0 0;border:0;align-items:center;gap:10px;padding:0;font-size:21px;font-weight:760;display:inline-flex}.brand-mark{background:var(--ink);width:34px;height:34px;color:var(--lime);font-family:var(--font-geist-mono), monospace;border-radius:11px;place-items:center;font-size:17px;font-weight:800;display:inline-grid;transform:rotate(-4deg)}.topbar-note{color:var(--muted);font-size:14px}.product-nav{background:#e8e9e1c2;border-radius:12px;align-items:center;gap:5px;padding:4px;display:flex}.product-nav a{min-height:38px;color:var(--muted);border-radius:9px;align-items:center;padding:0 13px;font-size:12px;font-weight:680;text-decoration:none;display:inline-flex}.product-nav a:hover,.product-nav a.active{background:var(--white);color:var(--ink);box-shadow:0 2px 8px #17221d12}.hero{grid-template-columns:minmax(0,.9fr) minmax(480px,1.1fr);align-items:center;gap:82px;width:min(1180px,100% - 40px);margin:52px auto 0;display:grid;position:relative}.hero:before,.hero:after{content:"";z-index:-1;filter:blur(1px);opacity:.7;border-radius:999px;position:absolute}.hero:before{background:#c9f45b3d;width:270px;height:270px;top:-70px;left:-130px}.hero:after{background:#ff765f1c;width:180px;height:180px;bottom:-90px;right:-40px}.eyebrow-pill{min-height:32px;color:var(--navy);background:#ffffff8c;border:1px solid #193c342e;border-radius:999px;align-items:center;padding:6px 12px;font-size:13px;font-weight:680;display:inline-flex}.hero-copy h1{letter-spacing:-.068em;max-width:650px;margin:24px 0 20px;font-size:clamp(48px,5.3vw,78px);line-height:.98}.hero-copy>p{max-width:570px;color:var(--muted);letter-spacing:-.018em;margin:0;font-size:19px;line-height:1.65}.creator-card{background:var(--card);min-height:405px;box-shadow:var(--shadow);border:1px solid #17221d1a;border-radius:28px;padding:28px;position:relative}.creator-card:before{content:"";z-index:-1;background:var(--lime);border-radius:24px;position:absolute;inset:10px;transform:rotate(2.5deg)translate(8px,8px)}.creator-card label,.creator-card legend{color:#37433d;margin:0 0 9px;padding:0;font-size:13px;font-weight:680;display:block}.url-row{background:#fff;border:1px solid #cfd2ca;border-radius:16px;align-items:center;gap:10px;min-height:66px;padding:7px 7px 7px 16px;transition:border-color .16s,box-shadow .16s;display:flex}.url-row:focus-within{border-color:var(--navy);box-shadow:0 0 0 4px #193c3414}.play-dot{background:var(--coral-soft);width:26px;height:26px;color:var(--coral);border-radius:8px;flex:none;place-items:center;font-size:10px;display:grid}.url-row input{min-width:0;color:var(--ink);background:0 0;border:0;outline:0;flex:1;font-size:15px}.url-row input::placeholder{color:#9a9f99}.primary-button,.secondary-button,.ghost-button,.back-button,.text-button{cursor:pointer;border:0;border-radius:12px;min-height:44px;font-weight:680;transition:transform .15s,background .15s,opacity .15s}.primary-button{background:var(--ink);color:var(--white);padding:0 20px;box-shadow:0 8px 18px #17221d24}.primary-button:hover:not(:disabled){background:var(--navy);transform:translateY(-1px)}.primary-button:disabled{cursor:not-allowed;opacity:.38}.primary-button.large{min-height:52px;padding:0 24px}.secondary-button{background:var(--white);border:1px solid #cfd2ca;min-height:50px;padding:0 20px}.secondary-button:hover,.ghost-button:hover{background:#f0f0e9}.text-button{min-height:auto;color:var(--navy);text-underline-offset:3px;background:0 0;border-radius:4px;padding:3px 0;font-size:13px;text-decoration:underline}.form-help{min-height:34px;color:var(--muted);justify-content:space-between;align-items:center;gap:12px;margin:7px 2px 18px;font-size:12px;display:flex}.inline-error{color:#a53d2d;margin:-8px 2px 18px;font-size:13px;font-weight:620}.customize-row{border-top:1px solid #ebebe5;grid-template-columns:1fr minmax(210px,.78fr);gap:20px;padding-top:20px;display:grid}.customize-row fieldset{border:0;min-width:0;margin:0;padding:0}.segmented-control{background:#eeefe8;border-radius:12px;max-width:100%;padding:4px;display:inline-flex}.segmented-control button{min-height:38px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:9px;padding:0 13px;font-size:12px;font-weight:630}.segmented-control button.active{background:var(--white);color:var(--ink);box-shadow:0 2px 8px #17221d14}.segmented-control.compact button{min-width:40px;padding:0 9px}.depth-fieldset{min-width:0}.depth-control{width:100%}.depth-control button{flex:1}.depth-help{color:var(--muted);margin-top:8px;font-size:10px;line-height:1.4;display:block}.adaptive-note{color:#7d877f;margin:12px 2px 0;font-size:10px;line-height:1.45}.language-options{background:#f3f8eb;border:1px solid #d6dfcf;border-radius:14px;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px;padding:15px;display:grid}.language-options label{margin:0}.language-options select{background:var(--white);width:100%;min-height:44px;color:var(--ink);border:1px solid #c8cec3;border-radius:10px;margin-top:7px;padding:0 12px;display:block}.language-options p{color:#5c6b61;grid-column:1/-1;margin:0;font-size:11px;line-height:1.5}.auto-quiz-plan{background:#eeefe8;border-radius:12px;align-items:center;gap:10px;min-width:0;padding:8px 10px;display:flex}.auto-quiz-plan>span{background:var(--navy);width:34px;height:34px;color:var(--lime);font-family:var(--font-geist-mono), monospace;border-radius:10px;flex:none;place-items:center;font-size:11px;font-weight:800;display:grid}.auto-quiz-plan strong,.auto-quiz-plan small{display:block}.auto-quiz-plan strong{font-size:12px}.auto-quiz-plan small{color:var(--muted);margin-top:3px;font-size:10px;line-height:1.35}.processing{z-index:2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#fffefaf7;border-radius:28px;padding:34px;position:absolute;inset:0}.processing-heading{border-bottom:1px solid var(--line);align-items:center;gap:15px;padding-bottom:24px;display:flex}.processing-heading strong,.processing-heading span{display:block}.processing-heading strong{margin-bottom:4px;font-size:18px}.processing-heading span{color:var(--muted);font-size:13px}.spinner{border:3px solid #e3e6dc;border-top-color:var(--navy);border-radius:50%;width:40px;height:40px;animation:.9s linear infinite spin}.processing-steps{gap:15px;margin:24px 0 0;padding:0;list-style:none;display:grid}.processing-steps li{color:#a4aaa5;align-items:center;gap:12px;font-size:14px;display:flex}.processing-steps li span{border:1px solid #d9dcd4;border-radius:50%;place-items:center;width:28px;height:28px;font-size:12px;font-weight:700;display:grid}.processing-steps li.current{color:var(--ink);font-weight:650}.processing-steps li.current span{border-color:var(--navy);background:var(--navy);color:var(--lime)}.processing-steps li.done{color:#5b665f}.processing-steps li.done span{background:var(--mint);color:#25703b;border-color:#b8dfc2}.how-it-works,.recent-section{width:min(1180px,100% - 40px);margin:126px auto 0}.how-it-works{background:var(--ink);color:var(--white);border-radius:28px;padding:42px}.section-kicker,.card-label{color:#6d786f;letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:760}.how-it-works .section-kicker{color:var(--lime)}.how-it-works h2,.recent-section h2{letter-spacing:-.045em;max-width:500px;margin:9px 0 28px;font-size:clamp(29px,3.1vw,42px);line-height:1.05}.loop-list{background:#ffffff21;border:1px solid #ffffff21;border-radius:18px;grid-template-columns:repeat(4,1fr);gap:1px;margin:0;padding:0;list-style:none;display:grid;overflow:hidden}.loop-list li{background:var(--ink);min-height:190px;padding:24px}.loop-list li>span{color:var(--lime);font-family:var(--font-geist-mono), monospace;margin-bottom:38px;font-size:12px;display:block}.loop-list strong{font-size:20px}.loop-list p{color:#bfc8c2;margin:9px 0 0;font-size:14px;line-height:1.55}.recent-section{margin-top:86px}.recent-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.recent-card{border:1px solid var(--line);background:var(--card);text-align:left;cursor:pointer;border-radius:18px;grid-template-columns:148px 1fr;gap:18px;min-height:122px;padding:10px;display:grid}.recent-card:hover{border-color:#bbc1b9;box-shadow:0 12px 30px #17221d12}.recent-card img{object-fit:cover;border-radius:12px;width:100%;height:100px}.recent-card div{flex-direction:column;justify-content:center;min-width:0;display:flex}.recent-card span{color:var(--coral);letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px;font-size:11px;font-weight:720}.recent-card strong{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:16px;line-height:1.35;display:-webkit-box;overflow:hidden}.recent-card small{color:var(--muted);margin-top:7px}.home-footer{border-top:1px solid var(--line);width:min(1180px,100% - 40px);color:var(--muted);justify-content:space-between;gap:30px;margin:96px auto 0;padding:28px 0 40px;display:flex}.home-footer>span{color:var(--ink);font-weight:760}.home-footer p{text-align:right;max-width:650px;margin:0;font-size:12px;line-height:1.6}.app-header{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f7f5eee0;width:100%;height:76px;padding:0 34px}.ghost-button{border:1px solid var(--line);background:0 0;min-height:40px;padding:0 15px;font-size:13px}.app-header-actions{align-items:center;gap:8px;display:flex}.notes-shortcut{background:var(--navy);min-height:40px;color:var(--white);border-radius:11px;align-items:center;padding:0 14px;font-size:12px;font-weight:700;text-decoration:none;display:inline-flex}.notes-shortcut:hover{background:#245046}.stepper{align-items:center;gap:8px;display:flex}.stepper>span{color:#909891;border-radius:999px;align-items:center;gap:7px;padding:7px 11px;font-size:12px;font-weight:650;display:inline-flex}.stepper>span i{width:20px;height:20px;font-family:var(--font-geist-mono), monospace;border:1px solid #cdd1ca;border-radius:50%;place-items:center;font-size:9px;font-style:normal;display:grid}.stepper>span.active{background:var(--white);color:var(--ink);box-shadow:0 3px 12px #17221d12}.stepper>span.active i{border-color:var(--navy);background:var(--navy);color:var(--lime)}.lesson-layout{grid-template-columns:minmax(330px,.38fr) minmax(0,.62fr);min-height:calc(100vh - 76px);display:grid}.video-panel{border-right:1px solid var(--line);background:#efeee7;min-width:0;padding:34px}.video-player{width:100%;position:sticky;top:110px}.youtube-player-frame{aspect-ratio:16/9;background:var(--ink);border-radius:18px;width:100%;position:relative;overflow:hidden;box-shadow:0 16px 40px #17221d21}.youtube-player-frame iframe{border:0;width:100%;height:100%;position:absolute;inset:0}.player-loading{z-index:2;background:var(--ink);color:#dce2dd;justify-content:center;align-items:center;gap:11px;font-size:12px;display:flex;position:absolute;inset:0}.player-loading .spinner{border-color:#ffffff2e;border-top-color:var(--lime);width:26px;height:26px}.player-notice{background:var(--card);color:var(--muted);border:1px solid #d8d9d1;border-radius:10px;justify-content:space-between;align-items:center;gap:12px;margin-top:8px;padding:9px 11px;font-size:11px;line-height:1.4;display:flex}.player-notice a{color:var(--navy);flex:none;font-weight:700}.video-meta{margin-top:22px;position:sticky;top:calc(110px + min(22vw,270px))}.video-meta span{color:var(--coral);letter-spacing:.08em;text-transform:uppercase;font-size:11px;font-weight:740}.video-meta h2{letter-spacing:-.025em;margin:9px 0 8px;font-size:19px;line-height:1.35}.video-meta p{color:var(--muted);margin:0;font-size:13px}.video-meta small{color:#7d877f;margin-top:10px;font-size:11px;display:block}.source-note{color:var(--muted);border-top:1px solid #d7d8d0;gap:10px;margin-top:24px;padding-top:20px;display:flex;position:sticky;top:calc(238px + min(22vw,270px))}.source-note>span{border:1px solid #bdc2bb;border-radius:50%;flex:none;place-items:center;width:20px;height:20px;font-family:serif;font-size:11px;font-weight:700;display:grid}.source-note p{margin:0;font-size:11px;line-height:1.55}.lesson-content{min-width:0;padding:66px clamp(32px,6vw,90px) 86px}.lesson-heading{max-width:780px}.lesson-heading h1{letter-spacing:-.058em;outline:0;margin:10px 0 17px;font-size:clamp(39px,4.6vw,66px);line-height:1}.lesson-heading>p{color:#56615a;margin:0;font-size:18px;line-height:1.65}.lesson-actions{flex-wrap:wrap;gap:10px;margin-top:30px;display:flex}.summary-card{background:var(--mint);border:1px solid #bcd0b9;border-radius:20px;max-width:900px;margin-top:60px;padding:30px 34px;position:relative;overflow:hidden}.summary-card:after{content:"60";color:#193c3412;font-family:var(--font-geist-mono), monospace;font-size:130px;font-weight:800;position:absolute;bottom:-35px;right:16px}.summary-card p{z-index:1;color:#2d4538;max-width:780px;margin:14px 0 0;font-size:17px;line-height:1.65;position:relative}.notes-card{border:1px solid var(--line);background:var(--card);border-radius:20px;max-width:900px;margin-top:20px;padding:30px 34px}.notes-heading{justify-content:space-between;align-items:end;gap:20px;display:flex}.notes-heading h2{letter-spacing:-.04em;margin:8px 0 0;font-size:27px}.notes-heading>span{color:var(--muted);flex:none;font-size:12px}.notes-intro{max-width:690px;color:var(--muted);margin:12px 0 0;font-size:13px;line-height:1.55}.note-composer{background:#f5f5ef;border:1px solid #d8dad2;border-radius:15px;margin-top:22px;padding:16px}.note-composer label{margin-bottom:8px;font-size:12px;font-weight:720;display:block}.note-composer textarea,.note-edit-field{resize:vertical;background:var(--white);width:100%;min-height:112px;color:var(--ink);border:1px solid #cfd2ca;border-radius:11px;padding:13px 14px;font-size:14px;line-height:1.55;display:block}.note-composer textarea::placeholder{color:#989f98}.note-composer-actions{justify-content:space-between;align-items:center;gap:12px;margin-top:10px;display:flex}.note-time-button,.saved-note-time,.saved-note-actions button{cursor:pointer;background:0 0;border:0;border-radius:10px;min-height:44px;font-weight:680}.note-time-button{color:var(--navy);padding:0 12px;font-size:12px}.note-time-button:hover,.saved-note-actions button:hover{background:#e9ebe3}.note-composer small{color:#858d86;margin-top:8px;font-size:10px;display:block}.note-error{color:#a53d2d;margin:12px 0 0;font-size:12px;font-weight:650}.notes-list{gap:10px;margin-top:18px;display:grid}.notes-empty{color:var(--muted);text-align:center;border:1px dashed #d1d4cc;border-radius:12px;padding:18px;font-size:12px}.saved-note{background:#fffefb;border:1px solid #dedfd7;border-radius:13px;padding:16px 17px}.saved-note-topline{justify-content:space-between;align-items:center;gap:14px;display:flex}.saved-note-time{background:var(--navy);min-height:44px;color:var(--lime);font-family:var(--font-geist-mono), monospace;padding:0 10px;font-size:11px}.saved-note-time:hover{background:#245046}.saved-note-topline>span{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.saved-note>p{color:#3f4b44;white-space:pre-wrap;margin:12px 0 0;font-size:14px;line-height:1.6}.note-edit-field{min-height:90px;margin-top:12px}.saved-note-actions{justify-content:flex-end;gap:4px;margin-top:7px;display:flex}.saved-note-actions button{min-height:44px;color:var(--navy);padding:0 10px;font-size:11px}.saved-note-actions .danger-text-button{color:#a53d2d}.notes-page-shell{background:radial-gradient(circle at 88% 8%, #c9f45b2e, transparent 25%), var(--paper);min-height:100vh;padding-bottom:80px}.notes-topbar{justify-content:space-between;align-items:center;width:min(1180px,100% - 40px);height:84px;margin:0 auto;display:flex}.notes-topbar .brand{color:var(--ink);text-decoration:none}.notes-landing{grid-template-columns:minmax(0,1fr) minmax(390px,.72fr);align-items:center;gap:clamp(40px,8vw,110px);width:min(1180px,100% - 40px);margin:64px auto 0;display:grid}.notes-landing h1{letter-spacing:-.07em;max-width:700px;margin:20px 0;font-size:clamp(52px,7vw,92px);line-height:.94}.notes-landing>div>p{max-width:660px;color:var(--muted);margin:0;font-size:18px;line-height:1.65}.notes-video-form{background:var(--card);box-shadow:var(--shadow);border:1px solid #17221d1a;border-radius:24px;padding:28px}.notes-video-form>label{color:#37433d;margin-bottom:9px;font-size:13px;font-weight:680;display:block}.notes-video-form>small{color:var(--muted);margin-top:10px;font-size:11px;display:block}.notebooks-section{width:min(1180px,100% - 40px);margin:110px auto 0}.notebook-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:22px;display:grid}.notebook-card{border:1px solid var(--line);background:var(--card);min-width:0;min-height:148px;color:var(--ink);cursor:pointer;text-align:left;border-radius:17px;grid-template-columns:130px minmax(0,1fr);gap:15px;padding:12px;transition:transform .15s,border-color .15s;display:grid}.notebook-card:hover{border-color:#b9c0b8;transform:translateY(-2px)}.notebook-card img{object-fit:cover;background:#e4e4dc;border-radius:11px;width:100%;height:100%;min-height:122px}.notebook-card>span{flex-direction:column;justify-content:center;min-width:0;display:flex}.notebook-card small{color:var(--coral);letter-spacing:.07em;text-transform:uppercase;font-size:10px;font-weight:740}.notebook-card strong{-webkit-line-clamp:3;-webkit-box-orient:vertical;margin-top:7px;font-size:14px;line-height:1.4;display:-webkit-box;overflow:hidden}.notebook-card i{color:var(--navy);margin-top:10px;font-size:10px;font-style:normal;font-weight:720}.notebooks-empty{color:var(--muted);text-align:center;border:1px dashed #cbd0c7;border-radius:17px;margin-top:22px;padding:34px;font-size:13px}.notes-workspace{width:min(1380px,100% - 40px);margin:36px auto 0}.notes-workspace-heading{grid-template-columns:130px minmax(0,1fr);align-items:start;gap:26px;max-width:900px;margin-bottom:28px;display:grid}.notes-workspace-heading h1{letter-spacing:-.05em;margin:7px 0 5px;font-size:clamp(30px,4vw,52px);line-height:1.03}.notes-workspace-heading p{color:var(--muted);margin:0}.notes-workspace-grid{grid-template-columns:minmax(420px,.95fr) minmax(430px,1.05fr);align-items:start;gap:22px;display:grid}.notes-video-column{border:1px solid var(--line);background:#ecebe4;border-radius:22px;min-width:0;padding:18px;position:sticky;top:22px}.notes-video-guidance{padding:18px 4px 2px}.notes-video-guidance strong{font-size:13px}.notes-video-guidance p{color:var(--muted);margin:5px 0 0;font-size:12px;line-height:1.5}.notebook-panel{border:1px solid var(--line);background:var(--card);border-radius:22px;min-width:0;padding:28px;box-shadow:0 18px 50px #17221d0f}.notebook-panel .notes-list{max-height:none}.concept-heading{justify-content:space-between;align-items:end;gap:20px;max-width:900px;margin-top:66px;display:flex}.concept-heading h2{letter-spacing:-.04em;margin:8px 0 0;font-size:30px}.concept-heading>span{color:var(--muted);font-size:12px}.concept-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:900px;margin-top:20px;display:grid}.concept-card{border:1px solid var(--line);background:var(--card);border-radius:18px;min-height:280px;padding:26px;position:relative;overflow:hidden}.concept-number{color:#ecece5;font-family:var(--font-geist-mono), monospace;letter-spacing:-.07em;font-size:58px;font-weight:800;position:absolute;top:7px;right:16px}.concept-card>span{color:var(--coral);letter-spacing:.1em;text-transform:uppercase;font-size:10px;font-weight:760;position:relative}.concept-card h3{letter-spacing:-.035em;max-width:82%;margin:38px 0 12px;font-size:22px;line-height:1.1;position:relative}.concept-card p{color:var(--muted);margin:0;font-size:14px;line-height:1.6;position:relative}.concept-card .timestamp-button,.feedback-box .timestamp-button,.review-card>.timestamp-button{color:var(--navy);cursor:pointer;background:0 0;border:0;align-items:center;gap:7px;margin:0;padding:0;font-size:12px;font-weight:690;text-decoration:none;display:inline-flex;position:absolute;bottom:23px;left:26px}.concept-card .timestamp-button:hover,.feedback-box .timestamp-button:hover,.review-card>.timestamp-button:hover{text-underline-offset:3px;text-decoration:underline}.chapter-heading{justify-content:space-between;align-items:end;gap:20px;max-width:900px;margin-top:66px;display:flex}.chapter-heading h2{letter-spacing:-.04em;margin:8px 0 0;font-size:30px}.chapter-heading>span{color:var(--muted);flex:none;font-size:12px}.chapter-list{gap:14px;max-width:900px;margin:20px 0 0;padding:0;list-style:none;display:grid}.chapter-card{border:1px solid var(--line);background:var(--card);border-radius:18px;min-width:0;padding:26px 28px;position:relative;overflow:hidden;box-shadow:0 8px 24px #17221d09}.chapter-card:after{content:"";background:var(--lime-dark);width:4px;position:absolute;inset:0 auto 0 0}.chapter-card-top{z-index:1;justify-content:space-between;align-items:center;gap:16px;display:flex;position:relative}.chapter-number{background:var(--navy);min-width:36px;height:28px;color:var(--lime);font-family:var(--font-geist-mono), monospace;letter-spacing:.05em;border-radius:8px;place-items:center;padding:0 8px;font-size:10px;font-weight:800;display:inline-grid}.chapter-range{color:var(--coral);font-family:var(--font-geist-mono), monospace;letter-spacing:.02em;font-size:11px;font-weight:720}.chapter-card h3{z-index:1;letter-spacing:-.038em;margin:20px 0 10px;font-size:25px;line-height:1.15;position:relative}.chapter-card>p{z-index:1;max-width:760px;color:var(--muted);margin:0;font-size:14px;line-height:1.65;position:relative}.chapter-progress{z-index:1;color:var(--muted);background:#f2f3ec;border-radius:10px;justify-content:space-between;align-items:center;gap:12px;margin-top:15px;padding:9px 11px;font-size:11px;display:flex;position:relative}.chapter-progress strong{color:var(--navy);font-weight:720}.chapter-skill-list{z-index:1;flex-wrap:wrap;gap:6px;margin-top:9px;display:flex;position:relative}.chapter-skill-list span{background:var(--white);color:#5b675f;letter-spacing:.02em;border:1px solid #d9ddd4;border-radius:999px;padding:5px 8px;font-size:9px;font-weight:680}.chapter-points{z-index:1;color:#4f5c54;gap:8px;margin:18px 0 0;padding:0;font-size:12px;line-height:1.5;list-style:none;display:grid;position:relative}.chapter-points>*{margin:0;padding-left:17px;position:relative}.chapter-points>:before{content:"";background:var(--lime-dark);border-radius:50%;width:6px;height:6px;position:absolute;top:.55em;left:0}.chapter-points strong,.chapter-points span{display:block}.chapter-points strong{color:var(--ink);font-size:12px;font-weight:720}.chapter-points span{color:var(--muted);margin-top:2px}.chapter-actions{z-index:1;flex-wrap:wrap;align-items:center;gap:9px;margin-top:22px;display:flex;position:relative}.chapter-watch-button,.chapter-quiz-button{cursor:pointer;border-radius:11px;justify-content:center;align-items:center;gap:8px;min-height:42px;padding:0 15px;font-size:12px;font-weight:690;transition:transform .15s,background .15s,border-color .15s;display:inline-flex}.chapter-watch-button{border:1px solid var(--navy);background:var(--navy);color:var(--white)}.chapter-quiz-button{color:var(--navy);background:#f2f3ec;border:1px solid #d4d7cf}.chapter-watch-button:hover,.chapter-quiz-button:hover:not(:disabled){transform:translateY(-1px)}.chapter-watch-button:hover{background:#245046}.chapter-quiz-button:hover:not(:disabled){background:#e9ebe3;border-color:#b9c0b8}.chapter-quiz-button:disabled{cursor:not-allowed;opacity:.48}.bottom-quiz-callout{background:var(--lime);border-radius:20px;justify-content:space-between;align-items:center;gap:30px;max-width:900px;margin-top:18px;padding:30px;display:flex}.bottom-quiz-callout h2{letter-spacing:-.035em;max-width:520px;margin:7px 0 0;font-size:25px;line-height:1.15}.quiz-screen{width:min(920px,100% - 40px);margin:0 auto;padding:46px 0 80px}.quiz-topline{justify-content:space-between;align-items:center;margin-bottom:13px;display:flex}.quiz-topline>span{color:var(--muted);font-family:var(--font-geist-mono), monospace;font-size:12px}.back-button{min-height:38px;color:var(--muted);background:0 0;padding:0;font-size:13px}.back-button:hover{color:var(--ink)}.progress-track{background:#e2e3dc;border-radius:99px;width:100%;height:6px;overflow:hidden}.progress-track span{border-radius:inherit;background:var(--lime-dark);height:100%;transition:width .26s;display:block}.quiz-card{border:1px solid var(--line);background:var(--card);border-radius:26px;margin-top:24px;padding:clamp(28px,5vw,56px);box-shadow:0 18px 50px #17221d12}.question-kicker{color:var(--coral);letter-spacing:.09em;text-transform:uppercase;font-size:11px;font-weight:750}.quiz-card h1{letter-spacing:-.045em;outline:0;max-width:760px;margin:14px 0 32px;font-size:clamp(28px,3.5vw,43px);line-height:1.12}.answer-list{border:0;gap:10px;margin:0;padding:0;display:grid}.answer-card{background:var(--white);cursor:pointer;border:1px solid #d8dad2;border-radius:14px;grid-template-columns:38px 1fr auto;align-items:center;gap:14px;min-height:70px;padding:12px 17px;transition:border-color .15s,box-shadow .15s,transform .15s;display:grid}.answer-card:hover:not(:has(input:disabled)){border-color:#9da79f;transform:translateY(-1px)}.answer-card input{opacity:0;pointer-events:none;position:absolute}.answer-key{width:36px;height:36px;color:var(--muted);font-family:var(--font-geist-mono), monospace;border:1px solid #cfd2ca;border-radius:10px;place-items:center;font-size:12px;font-weight:700;display:grid}.answer-copy{font-size:14px;line-height:1.45}.answer-card.selected{border-color:var(--navy);box-shadow:0 0 0 3px #193c3414}.answer-card.selected .answer-key{border-color:var(--navy);background:var(--navy);color:var(--lime)}.answer-card.correct{box-shadow:none;background:#f0fbf2;border-color:#6fa77d}.answer-card.correct .answer-key{color:var(--white);background:#2f7744;border-color:#6fa77d}.answer-card.wrong{background:var(--coral-soft);box-shadow:none;border-color:#df8b7b}.answer-card.wrong .answer-key{border-color:var(--coral);background:var(--coral);color:var(--white)}.answer-status{color:#2f7744;font-size:11px}.answer-card.wrong .answer-status{color:#a64434}.confidence-row{background:#f2f2ec;border-radius:12px;justify-content:space-between;align-items:center;gap:14px;min-height:54px;margin-top:18px;padding:10px 14px;display:flex}.confidence-row>span{color:var(--muted);font-size:12px}.confidence-options{gap:4px;display:flex}.confidence-options button{min-height:32px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:8px;padding:0 10px;font-size:11px;font-weight:620}.confidence-options button.active{background:var(--white);color:var(--ink);box-shadow:0 2px 7px #17221d14}.feedback-box{border-radius:16px;grid-template-columns:42px 1fr;gap:16px;min-height:150px;margin-top:18px;padding:20px 22px 42px;display:grid;position:relative}.feedback-box.positive{background:#eef9f0;border:1px solid #abd5b5}.feedback-box.negative{background:var(--coral-soft);border:1px solid #edb3a8}.feedback-icon{width:40px;height:40px;color:var(--white);background:#2f7744;border-radius:50%;place-items:center;font-weight:800;display:grid}.negative .feedback-icon{background:var(--coral)}.feedback-box strong{margin:2px 0 7px;font-size:15px;display:block}.feedback-box p{color:#59635c;margin:0;font-size:13px;line-height:1.55}.feedback-box .question-evidence{color:#536159;border-left:2px solid #193c3438;margin:10px 0 0;padding-left:12px;font-size:12px;font-style:italic;line-height:1.5}.feedback-box .timestamp-button{bottom:18px;left:80px}.quiz-footer{border-top:1px solid #0000;justify-content:space-between;align-items:end;gap:20px;min-height:74px;padding-top:22px;display:flex}.keyboard-hint{color:#929991;font-size:11px}.results-screen{width:min(960px,100% - 40px);margin:0 auto;padding:58px 0 90px}.results-card{border:1px solid var(--line);background:var(--card);text-align:center;box-shadow:var(--shadow);border-radius:28px;padding:clamp(32px,6vw,68px)}.score-ring{--score:0deg;background:conic-gradient(var(--lime-dark) var(--score), #e5e6df 0);border-radius:50%;place-items:center;width:158px;height:158px;margin:0 auto 34px;display:grid}.score-ring>div{background:var(--card);border-radius:50%;place-content:center;width:126px;height:126px;display:grid}.score-ring strong,.score-ring span{display:block}.score-ring strong{letter-spacing:-.055em;font-size:40px}.score-ring span{color:var(--muted);margin-top:3px;font-size:12px}.results-card>h1{letter-spacing:-.052em;outline:0;max-width:650px;margin:12px auto 13px;font-size:clamp(34px,4.2vw,54px);line-height:1.03}.results-scope{color:var(--coral);margin-top:10px;font-size:12px;font-weight:730;display:block}.results-card>p{max-width:650px;color:var(--muted);margin:0 auto;font-size:15px;line-height:1.6}.mastery-grid{text-align:left;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;max-width:720px;margin:40px auto 0;display:grid}.mastery-grid>div{border:1px solid var(--line);background:#f6f6f0;border-radius:16px;min-height:155px;padding:20px}.mastery-label{letter-spacing:.08em;text-transform:uppercase;border-radius:7px;padding:5px 8px;font-size:10px;font-weight:760;display:inline-flex}.mastery-label.mastered{background:var(--mint);color:#2d6c3d}.mastery-label.review{background:var(--coral-soft);color:#a04434}.mastery-grid ul{gap:8px;margin:16px 0 0;padding:0;list-style:none;display:grid}.mastery-grid li,.mastery-grid p{color:#59635c;font-size:12px;line-height:1.45}.results-actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;margin-top:34px;display:flex}.review-screen{width:min(940px,100% - 40px);margin:0 auto;padding:62px 0 90px}.review-heading{max-width:720px}.review-heading h1{letter-spacing:-.055em;outline:0;margin:12px 0 15px;font-size:clamp(38px,5vw,62px);line-height:1}.review-heading p{color:var(--muted);margin:0;font-size:16px;line-height:1.6}.review-list{gap:16px;margin-top:44px;display:grid}.review-card{border:1px solid var(--line);background:var(--card);border-radius:20px;padding:28px 30px 66px;position:relative}.review-card-top{justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px;display:flex}.review-card-top span{color:var(--coral);font-family:var(--font-geist-mono), monospace;font-size:11px;font-weight:700}.review-card-top strong{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:11px}.review-card h2{letter-spacing:-.035em;max-width:780px;margin:0 0 24px;font-size:24px;line-height:1.25}.answer-comparison{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.answer-comparison>div{border-radius:12px;min-height:95px;padding:15px}.your-answer{background:var(--coral-soft);border:1px solid #efc0b7}.correct-answer{background:#eef9f0;border:1px solid #b9d9c0}.answer-comparison span{letter-spacing:.08em;text-transform:uppercase;font-size:10px;font-weight:760}.your-answer span{color:#a04434}.correct-answer span{color:#2f7744}.answer-comparison p{margin:8px 0 0;font-size:13px;line-height:1.45}.review-explanation{background:#f0f0ea;border-radius:12px;grid-template-columns:28px 1fr;gap:10px;margin-top:15px;padding:15px;display:grid}.review-explanation>span{font-weight:800}.review-explanation p{color:#56615a;margin:0;font-size:13px;line-height:1.55}.review-actions{flex-wrap:wrap;gap:10px;margin-top:24px;display:flex}.video-modal-backdrop{z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0a120eb8;justify-content:center;align-items:center;padding:24px;animation:.18s ease-out modal-in;display:flex;position:fixed;inset:0;overflow-y:auto}.video-modal{background:var(--paper);border:1px solid #ffffff1f;border-radius:24px;width:min(920px,100%);padding:22px;box-shadow:0 28px 90px #00000059}.video-modal-heading{justify-content:space-between;align-items:center;gap:20px;margin-bottom:16px;display:flex}.video-modal-heading span{color:var(--coral);letter-spacing:.1em;text-transform:uppercase;font-size:10px;font-weight:760}.video-modal-heading h2{letter-spacing:-.035em;margin:5px 0 0;font-size:22px}.video-modal-heading button{background:var(--white);cursor:pointer;border:1px solid #cfd2ca;border-radius:50%;flex:none;width:42px;height:42px;font-size:25px;line-height:1}.video-modal>p{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;margin:13px 2px 0;font-size:12px;overflow:hidden}.video-modal .youtube-player-frame{border-radius:16px}.toast{z-index:10;background:var(--ink);min-height:52px;color:var(--white);box-shadow:var(--shadow);border-radius:13px;align-items:center;gap:10px;padding:0 18px;font-size:13px;font-weight:650;animation:.2s ease-out toast-in;display:flex;position:fixed;bottom:24px;right:24px}.toast span{background:var(--lime);width:23px;height:23px;color:var(--ink);border-radius:50%;place-items:center;display:grid}@keyframes spin{to{transform:rotate(360deg)}}@keyframes toast-in{0%{opacity:0;transform:translateY(8px)}}@keyframes modal-in{0%{opacity:0}}@media (width<=980px){.notes-landing{grid-template-columns:1fr;gap:38px;margin-top:36px}.notebook-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.notes-workspace-grid{grid-template-columns:1fr}.notes-video-column{position:relative;top:auto}.hero{grid-template-columns:1fr;gap:48px;margin-top:32px}.hero-copy{max-width:760px}.creator-card{min-height:0}.loop-list{grid-template-columns:repeat(2,1fr)}.lesson-layout{grid-template-columns:1fr}.video-panel{border-right:0;border-bottom:1px solid var(--line);grid-template-columns:260px 1fr;gap:20px;padding:24px;display:grid}.video-player{position:relative;top:auto}.video-meta,.source-note{position:static}.video-meta{align-self:center;margin:0}.source-note{grid-column:1/-1;margin:0;padding-top:14px}.lesson-content{padding-top:48px}}@media (width<=720px){.topbar,.app-header,.notes-topbar,.hero,.how-it-works,.recent-section,.notes-landing,.notebooks-section,.notes-workspace,.home-footer{width:min(100% - 28px,1180px)}.topbar,.notes-topbar{height:70px}.product-nav a{min-height:36px;padding:0 9px;font-size:10px}.notes-topbar .brand>span:last-child{display:none}.notes-landing{margin-top:28px}.notes-landing h1{font-size:clamp(46px,14vw,64px)}.notes-landing>div>p{font-size:16px}.notes-video-form,.notebook-panel{border-radius:19px;padding:18px}.notebooks-section{margin-top:76px}.notebook-grid{grid-template-columns:1fr}.notes-workspace{margin-top:22px}.notes-workspace-heading{grid-template-columns:1fr;gap:12px}.notes-workspace-heading h1{font-size:34px}.notes-video-column{border-radius:17px;padding:10px}.topbar-note{display:none}.hero{margin-top:28px}.hero-copy h1{font-size:clamp(43px,14vw,64px)}.hero-copy>p{font-size:16px}.creator-card{border-radius:22px;padding:18px}.url-row{grid-template-columns:28px 1fr;min-height:0;padding:10px;display:grid}.url-row .primary-button{grid-column:1/-1;width:100%}.form-help{align-items:flex-start}.customize-row,.language-options{grid-template-columns:1fr}.language-options p{grid-column:auto}.segmented-control{width:100%}.segmented-control button{flex:1}.depth-help,.adaptive-note{font-size:11px}.how-it-works{margin-top:82px;padding:28px 20px}.loop-list{grid-template-columns:1fr}.loop-list li{min-height:150px}.loop-list li>span{margin-bottom:24px}.recent-grid{grid-template-columns:1fr}.recent-card{grid-template-columns:118px 1fr}.home-footer{display:block}.home-footer p{text-align:left;margin-top:12px}.app-header{width:100%;height:68px;padding:0 14px}.app-header .brand>span:last-child,.stepper>span:not(.active){font-size:0}.stepper>span{gap:0;padding:5px}.stepper>span.active{gap:6px;padding-inline:8px;font-size:11px}.stepper>span i{font-size:9px}.ghost-button{min-height:36px;padding:0 10px;font-size:11px}.notes-shortcut{min-height:36px;padding:0 10px;font-size:0}.notes-shortcut:after{content:"Notes";font-size:11px}.video-panel{grid-template-columns:1fr;padding:18px}.source-note{grid-column:auto}.source-note p{font-size:13px;line-height:1.5}.lesson-content{padding:42px 18px 68px}.lesson-heading h1{font-size:43px}.lesson-heading>p{font-size:16px}.lesson-actions>*{width:100%}.summary-card{padding:24px}.notes-card{padding:21px 18px}.notes-heading{flex-direction:column;align-items:flex-start;gap:8px}.notes-heading h2{font-size:25px}.note-composer{padding:13px}.note-composer-actions{flex-direction:column;align-items:stretch}.note-time-button,.note-composer-actions .primary-button{width:100%}.saved-note-topline{flex-direction:column;align-items:flex-start;gap:5px}.saved-note-topline>span{white-space:normal}.saved-note-time{width:100%}.chapter-heading{flex-direction:column;align-items:flex-start;gap:8px;margin-top:54px}.chapter-heading h2{font-size:27px}.chapter-card{border-radius:16px;padding:21px 19px 20px 22px}.chapter-card-top{gap:10px}.chapter-number{min-width:34px;height:27px}.chapter-range{font-size:10px}.chapter-card h3{margin-top:17px;font-size:22px}.chapter-card>p{font-size:13px;line-height:1.6}.chapter-points{font-size:12px}.chapter-actions{flex-direction:column;align-items:stretch}.chapter-watch-button,.chapter-quiz-button{width:100%;min-height:46px}.concept-grid{grid-template-columns:1fr}.bottom-quiz-callout{flex-direction:column;align-items:flex-start}.bottom-quiz-callout .primary-button{width:100%}.quiz-screen,.results-screen,.review-screen{width:min(100% - 24px,940px);padding-top:26px}.quiz-card{border-radius:20px;margin-top:16px;padding:24px 16px}.quiz-card h1{font-size:28px}.answer-card{grid-template-columns:34px 1fr;padding:11px}.answer-status{grid-column:2}.confidence-row{flex-direction:column;align-items:flex-start}.confidence-options{width:100%}.confidence-options button{flex:1;padding:0 5px}.feedback-box{grid-template-columns:34px 1fr;padding:17px 15px 44px}.feedback-icon{width:34px;height:34px}.feedback-box .timestamp-button{left:64px}.video-modal-backdrop{align-items:flex-end;padding:0}.video-modal{border-radius:22px 22px 0 0;padding:16px}.quiz-footer{flex-direction:column;align-items:stretch}.keyboard-hint{display:none}.mastery-grid,.answer-comparison{grid-template-columns:1fr}.results-actions>*,.review-actions>*{width:100%}.review-card{padding:22px 18px 64px}.review-card-top{flex-direction:column;align-items:flex-start;gap:7px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}