/* Docket's tutorial library. Native video controls; no player dependencies. */
:root{--tu-ink:#12263A;--tu-paper:#FAF7F0;--tu-green:#1F7A5C;--tu-muted:#526171;--tu-line:#E4DFD3;--tu-white:#FFFDF8}
html{scroll-behavior:smooth;scroll-padding-top:110px}
body{line-height:1.5}
button,input{font:inherit}
button,a,input,summary{-webkit-tap-highlight-color:transparent}
a{color:var(--tu-green)}
button{cursor:pointer}
[hidden]{display:none!important}
:focus-visible{outline:3px solid #338BDA;outline-offset:4px}
.tu-sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.tu-skip{position:fixed;top:8px;left:16px;z-index:100;background:var(--tu-ink);color:#fff;padding:12px 20px;border-radius:8px;transform:translateY(-180%)}
.tu-skip:focus{transform:none}
.tu-wrap{max-width:1320px;padding-left:40px;padding-right:40px;margin:0 auto}
.tu-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--tu-line);background:rgba(250,247,240,.96);backdrop-filter:blur(14px)}
.tu-header-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;min-height:86px}
.tu-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--tu-ink);font-size:20px;font-weight:600;letter-spacing:-.025em;flex-shrink:0}
.tu-logo-mark{position:relative;display:grid;place-items:center;width:30px;height:30px;border-radius:7px;background:var(--tu-ink);color:var(--tu-paper);font-size:18px;font-weight:800;overflow:hidden}
.tu-logo-mark:after{content:"";position:absolute;top:0;right:0;width:12px;height:12px;background:#34567A;clip-path:polygon(100% 0,0 0,100% 100%)}
.tu-nav{display:flex;align-items:center;gap:26px}
.tu-nav a{color:#4C5A67;font-size:14px;text-decoration:none;white-space:nowrap}
.tu-nav a:hover,.tu-nav a[aria-current]{color:var(--tu-green)}
.tu-nav a[aria-current]{position:relative;font-weight:600}
.tu-nav a[aria-current]:after{content:"";height:2px;background:var(--tu-green);position:absolute;left:0;right:0;bottom:-10px}
.tu-nav .tu-signup,.tu-signup{display:inline-flex;align-items:center;justify-content:center;gap:16px;background:var(--tu-green);color:var(--tu-paper);border-radius:8px;padding:11px 18px;font-weight:600;text-decoration:none;font-size:14px}
.tu-signup:hover{background:#19654C;color:var(--tu-paper)}
.tu-mobile-menu{display:none}
.tu-hero{padding-top:54px;padding-bottom:39px;display:flex;align-items:flex-end;justify-content:space-between;gap:50px}
.tu-eyebrow{font-family:'JetBrains Mono',monospace;display:flex;align-items:center;gap:12px;letter-spacing:1.6px;font-size:10px;font-weight:500;text-transform:uppercase;margin:0 0 17px;color:var(--tu-green)}
.tu-eyebrow:before{content:"";display:inline-block;width:26px;height:1px;background:currentColor}
.tu-hero h1{font-size:48px;line-height:1.08;font-weight:500;letter-spacing:-.04em;margin:0 0 18px;max-width:780px}
.tu-hero h1 em{font-family:'Playfair Display',serif;font-weight:500}
.tu-hero p:not(.tu-eyebrow){font-size:16px;line-height:1.65;color:var(--tu-muted);max-width:630px;margin:0}
.tu-library-stat{display:flex;gap:25px;padding:0 0 5px;white-space:nowrap}
.tu-library-stat div+div{padding-left:25px;border-left:1px solid #D6D0C4}
.tu-library-stat dt{font-family:'JetBrains Mono',monospace;font-size:25px;line-height:1.2;letter-spacing:-1px;font-weight:500}
.tu-library-stat dd{font-size:11px;line-height:1.4;color:var(--tu-muted);margin:8px 0 0}
.tu-classroom{background:var(--tu-ink);border-radius:18px;overflow:hidden;box-shadow:0 20px 50px -35px rgba(18,38,58,.4)}
.tu-classroom-top{padding:17px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(250,247,240,.13);gap:16px}
.tu-classroom-top p{margin:0;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:1.2px;color:#D2DDD9;text-transform:uppercase}
.tu-classroom-top p:first-child{display:flex;align-items:center;gap:9px}
.tu-status-dot{height:6px;width:6px;border-radius:50%;background:#8BCCA9}
.tu-classroom-top span+span{color:#9DAEBE;letter-spacing:.4px;font-size:10px}
.tu-classroom-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px}
.tu-player-column{min-width:0;background:#0A1824;display:flex;flex-direction:column}
.tu-video-frame{position:relative;aspect-ratio:16/9;display:grid;align-items:center;background:#07111B}
.tu-video-frame video{display:block;width:100%;height:100%;aspect-ratio:16/9;object-fit:contain}
.tu-video-frame video::cue{font-family:'Inter',sans-serif;font-size:100%;line-height:1.4;background:rgba(7,17,27,.88);color:white}
.tu-video-error{background:#FFF7E1;color:#563E12;font-size:13px;line-height:1.5;padding:15px 22px;margin:0}
.tu-video-error a{color:inherit;text-decoration:underline}
.tu-player-caption{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 22px;color:#BDCBD7;font-size:11px;flex:1}
.tu-player-caption p{margin:0}
.tu-player-caption a{color:#E3EDE7;text-underline-offset:3px;white-space:nowrap}
.tu-playlist{border-left:1px solid rgba(250,247,240,.12);min-width:0;display:flex;flex-direction:column}
.tu-playlist-heading{display:flex;justify-content:space-between;align-items:center;padding:20px 20px 15px;gap:10px}
.tu-playlist-heading h2{font-size:14px;font-weight:500;color:var(--tu-paper);margin:0;letter-spacing:-.01em}
.tu-playlist-heading span{font-family:'JetBrains Mono',monospace;font-size:10px;color:#AFBDCB}
.tu-playlist ol{list-style:none;margin:0;padding:0 10px 12px;max-height:444px;overflow:auto;scrollbar-width:thin;scrollbar-color:#4B6276 var(--tu-ink)}
.tu-playlist li{margin:1px 0}
.tu-playlist-link{position:relative;display:flex;align-items:flex-start;gap:11px;padding:11px 10px;color:#CBD5DE;text-decoration:none;border-radius:6px;font-size:12px;line-height:1.4;border:1px solid transparent}
.tu-playlist-link:hover{background:rgba(250,247,240,.055);color:white}
.tu-playlist-link[aria-current]{background:#203C4B;border-color:#466B68;color:var(--tu-paper)}
.tu-playlist-number{font-family:'JetBrains Mono',monospace;font-size:10px;color:#9AADBE;min-width:19px;line-height:1.7}
.tu-playlist-link[aria-current] .tu-playlist-number{color:#A9D5BE}
.tu-playlist-name{flex:1}
.tu-playlist-time{font-family:'JetBrains Mono',monospace;font-size:9px;line-height:1.9;color:#A8B8C6;margin-left:auto}
.tu-lesson-detail{padding:30px 0 0;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:36px}
.tu-lesson-detail article{min-width:0}
.tu-lesson-kicker{font-family:'JetBrains Mono',monospace;font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--tu-green);margin:0 0 9px}
.tu-lesson-detail h2{font-size:25px;line-height:1.3;letter-spacing:-.025em;font-weight:500;margin:0 0 11px}
.tu-lesson-description{font-size:14px;line-height:1.65;color:var(--tu-muted);max-width:720px;margin:0}
.tu-lesson-actions{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:21px;padding-bottom:25px;border-bottom:1px solid var(--tu-line);flex-wrap:wrap}
.tu-navigation{display:flex;gap:8px}
.tu-nav-button{display:inline-flex;justify-content:center;align-items:center;gap:14px;border:1px solid #D4D0C5;border-radius:7px;padding:9px 12px;font-size:12px;font-weight:500;line-height:1.5;color:var(--tu-ink);background:transparent;text-decoration:none}
.tu-nav-button:hover{background:#F0ECE2;border-color:#B8B5AA}
.tu-nav-button[aria-disabled=true]{opacity:.45;pointer-events:none}
.tu-nav-button.tu-next{background:var(--tu-white)}
.tu-downloads{display:flex;flex-wrap:wrap;gap:13px;font-size:11px}
.tu-downloads a{color:var(--tu-muted);text-underline-offset:3px}
.tu-downloads a:hover{color:var(--tu-green)}
.tu-chapters{padding-top:1px}
.tu-section-label{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:1.4px;text-transform:uppercase;color:#617163;margin:0;font-weight:500}
.tu-chapters ol{list-style:none;margin:13px 0 0;padding:0;display:grid;gap:4px}
.tu-chapter{display:flex;width:100%;gap:13px;text-align:left;border:0;background:transparent;padding:8px 9px;border-radius:5px;color:var(--tu-muted);font-size:11px;line-height:1.45}
.tu-chapter time{font-family:'JetBrains Mono',monospace;color:var(--tu-green);min-width:34px;font-size:10px;line-height:1.55}
.tu-chapter:hover,.tu-chapter[aria-current]{background:#EBEEE5;color:var(--tu-ink)}
.tu-transcript{margin-top:21px;border-bottom:1px solid var(--tu-line);padding-bottom:16px}
.tu-transcript summary{cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:500;list-style:none;padding:0 0 7px;gap:18px}
.tu-transcript summary::-webkit-details-marker{display:none}
.tu-transcript summary:after{content:"+";color:var(--tu-green);font-size:22px;font-weight:400;line-height:1}
.tu-transcript[open] summary:after{content:"−"}
.tu-transcript-intro{font-size:11px;color:var(--tu-muted);margin:8px 0 15px}
.tu-transcript-lines{list-style:none;padding:0;margin:0;max-height:340px;overflow:auto;scrollbar-width:thin;scrollbar-color:#B3B8AF transparent}
.tu-transcript-lines li{display:flex;gap:18px;align-items:flex-start;font-size:12px;line-height:1.7;padding:7px 9px;border-radius:5px}
.tu-transcript-lines li:hover{background:#F0EDE5}
.tu-transcript-time{font-family:'JetBrains Mono',monospace;font-size:10px;border:0;background:transparent;color:var(--tu-green);padding:3px 0;min-width:38px;text-align:left;text-decoration:underline;text-underline-offset:3px;white-space:nowrap}
.tu-transcript-text{color:var(--tu-muted)}
.tu-demo-note{display:flex;gap:10px;align-items:flex-start;font-size:11px;line-height:1.6;color:var(--tu-muted);margin:20px 0 0;max-width:700px}
.tu-demo-note svg{flex-shrink:0;margin-top:1px}
.tu-library{padding-top:66px;padding-bottom:70px}
.tu-library-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:26px;margin-bottom:24px}
.tu-library h2{font-size:30px;line-height:1.2;font-weight:500;letter-spacing:-.03em;margin:0 0 8px}
.tu-library-heading p{font-size:13px;color:var(--tu-muted);margin:0}
.tu-search{display:flex;align-items:center;gap:9px;min-width:280px;background:var(--tu-white);border:1px solid #D8D3C8;border-radius:8px;padding:9px 12px;color:var(--tu-muted)}
.tu-search:focus-within{outline:2px solid var(--tu-green);outline-offset:2px}
.tu-search svg{flex-shrink:0}
.tu-search input{width:100%;min-width:0;background:transparent;border:0;outline:0;padding:0;font-size:12px;color:var(--tu-ink);line-height:1.8}
.tu-search input:focus-visible{outline:0}
.tu-filter-bar{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:25px}
.tu-filters{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.tu-filter{border:1px solid transparent;padding:7px 13px;border-radius:20px;background:transparent;color:var(--tu-muted);font-size:11px}
.tu-filter:hover{background:#EEECE2}
.tu-filter[aria-pressed=true]{border-color:var(--tu-green);background:#E7EEE5;color:#1B6048;font-weight:500}
.tu-results{font-family:'JetBrains Mono',monospace;color:var(--tu-muted);font-size:10px;white-space:nowrap;margin:0}
.tu-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.tu-card{display:flex;flex-direction:column;min-width:0;background:var(--tu-white);border:1px solid var(--tu-line);border-radius:11px;overflow:hidden;transition:box-shadow .15s,border-color .15s}
.tu-card:hover{box-shadow:0 8px 22px -14px rgba(18,38,58,.35);border-color:#BFC6B9}
.tu-card-visual{display:block;position:relative;aspect-ratio:16/9;background:#E6E9E6;overflow:hidden;border-bottom:1px solid var(--tu-line)}
.tu-card-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,17,27,0) 55%,rgba(7,17,27,.5))}
.tu-card-visual img{display:block;width:100%;height:100%;object-fit:cover}
.tu-card-play{position:absolute;z-index:1;display:grid;place-items:center;width:36px;height:36px;left:16px;bottom:13px;border-radius:50%;border:1px solid rgba(255,255,255,.6);background:rgba(18,38,58,.9);color:white;transition:background .15s}
.tu-card-visual:hover .tu-card-play{background:var(--tu-green)}
.tu-card-duration{position:absolute;z-index:1;right:13px;bottom:16px;font-family:'JetBrains Mono',monospace;font-size:10px;line-height:1.5;background:rgba(7,17,27,.85);border-radius:4px;padding:2px 5px;color:#fff}
.tu-card-content{padding:20px 21px 17px;display:flex;flex-direction:column;flex:1;align-items:flex-start}
.tu-card-kicker{display:flex;align-items:center;gap:9px;margin:0 0 10px;font-size:9px;font-family:'JetBrains Mono',monospace;text-transform:uppercase;letter-spacing:.7px;color:#617163}
.tu-card-kicker span:first-child{color:var(--tu-green);font-weight:600}
.tu-card h3{font-size:17px;line-height:1.4;letter-spacing:-.02em;font-weight:500;margin:0 0 9px}
.tu-card h3 a{color:var(--tu-ink);text-decoration:none}
.tu-card h3 a:hover{color:var(--tu-green)}
.tu-card-description{font-size:12px;line-height:1.65;color:var(--tu-muted);margin:0 0 20px}
.tu-card-links{display:flex;align-items:center;justify-content:space-between;gap:12px;align-self:stretch;border-top:1px solid var(--tu-line);padding-top:13px;margin-top:auto}
.tu-watch{font-size:11px;font-weight:600;text-decoration:none;color:var(--tu-green)}
.tu-card-downloads{display:flex;gap:10px;font-size:10px}
.tu-card-downloads a{color:var(--tu-muted);text-underline-offset:3px}
.tu-empty{padding:50px 20px;text-align:center;border:1px dashed #C9C8BD;border-radius:11px;color:var(--tu-muted);font-size:14px;margin:0}
.tu-support{display:flex;justify-content:space-between;align-items:center;gap:30px;border-top:1px solid var(--tu-line);padding-top:34px;margin-top:42px}
.tu-support h3{font-size:20px;line-height:1.3;font-weight:500;letter-spacing:-.02em;margin:0 0 8px}
.tu-support p{color:var(--tu-muted);font-size:13px;margin:0}
.tu-support a{white-space:nowrap;font-size:13px;font-weight:500;text-underline-offset:5px}
.tu-footer{background:var(--tu-ink);color:var(--tu-paper);padding:43px 0 26px}
.tu-footer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:30px}
.tu-footer .tu-logo{color:var(--tu-paper)}
.tu-footer .tu-logo-mark{background:var(--tu-paper);color:var(--tu-ink)}
.tu-footer .tu-logo-mark:after{background:#E4DBC7}
.tu-footer p{font-size:12px;line-height:1.7;color:#B7C1CB;max-width:310px;margin:15px 0 0}
.tu-footer nav{display:flex;align-items:center;gap:23px;flex-wrap:wrap;padding-top:7px}
.tu-footer nav a{font-size:12px;color:#D1D9E0;text-decoration:none}
.tu-footer nav a:hover{color:white;text-decoration:underline;text-underline-offset:4px}
.tu-footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid rgba(250,247,240,.14);margin-top:35px;padding-top:20px;color:#A6B5C3;font-size:11px}
.tu-nojs{font-size:13px;padding:16px 20px;background:#E7EEE5;border:1px solid #B7CDB9;border-radius:8px;margin:0 0 20px;color:var(--tu-ink)}
@media(min-width:1200px){.tu-playlist ol{max-height:477px}}
@media(max-width:1100px){.tu-nav{gap:18px}.tu-nav a{font-size:12px}.tu-classroom-grid{grid-template-columns:minmax(0,1fr) 290px}.tu-lesson-detail{grid-template-columns:minmax(0,1fr) 290px;gap:30px}.tu-hero h1{font-size:43px}.tu-hero{gap:30px}.tu-library-stat{gap:18px}.tu-library-stat div+div{padding-left:18px}.tu-playlist ol{max-height:368px}}
@media(max-width:900px){.tu-wrap{padding-left:26px;padding-right:26px}.tu-header-inner{min-height:72px}.tu-nav{display:none}.tu-mobile-menu{display:block}.tu-mobile-menu summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;font-size:12px;padding:10px 0 10px 10px}.tu-mobile-menu summary::-webkit-details-marker{display:none}.tu-mobile-menu summary:after{content:"☰";font-size:18px}.tu-mobile-menu[open] summary:after{content:"×";font-size:22px;line-height:1}.tu-mobile-menu nav{position:absolute;top:71px;left:0;right:0;padding:16px 26px 22px;background:var(--tu-paper);border-bottom:1px solid var(--tu-line);box-shadow:0 15px 20px -20px rgba(18,38,58,.5);display:grid;grid-template-columns:1fr 1fr;gap:3px 20px}.tu-mobile-menu nav a{color:var(--tu-ink);font-size:13px;padding:10px 0;text-decoration:none}.tu-mobile-menu nav a[aria-current]{color:var(--tu-green);font-weight:600}.tu-mobile-menu nav .tu-signup{padding:10px 15px;color:var(--tu-paper);grid-column:1/-1;margin-top:7px}.tu-hero{padding-top:39px;padding-bottom:30px}.tu-hero h1{font-size:38px}.tu-hero p:not(.tu-eyebrow){font-size:14px}.tu-library-stat{display:none}.tu-classroom-grid{grid-template-columns:minmax(0,1fr) 260px}.tu-playlist-link{font-size:11px;gap:8px;padding:10px 7px}.tu-playlist-heading{padding:16px 17px 12px}.tu-playlist ol{padding-left:7px;padding-right:7px;max-height:300px}.tu-player-caption{padding:12px 16px;font-size:10px}.tu-lesson-detail{grid-template-columns:minmax(0,1fr) 260px;gap:25px}.tu-lesson-detail h2{font-size:23px}.tu-lesson-actions{gap:15px}.tu-downloads{font-size:10px}.tu-cards{gap:18px}.tu-card-content{padding:17px 17px 15px}.tu-card h3{font-size:15px}.tu-card-description{font-size:11px}.tu-card-links{align-items:flex-start;gap:8px;flex-direction:column}.tu-card-downloads{font-size:9px}.tu-library{padding-top:52px}.tu-search{min-width:240px}.tu-footer nav{gap:15px}}
@media(max-width:700px){html{scroll-padding-top:88px}.tu-classroom{border-radius:12px}.tu-classroom-top{padding:14px 16px}.tu-classroom-top p{font-size:9px;letter-spacing:.8px}.tu-classroom-top span+span{font-size:9px}.tu-classroom-top p:last-child{display:none}.tu-classroom-grid{grid-template-columns:1fr}.tu-playlist{border-left:0;border-top:1px solid rgba(250,247,240,.13)}.tu-playlist-heading{padding:16px 16px 10px}.tu-playlist ol{max-height:230px;padding:0 9px 12px}.tu-playlist-link{font-size:12px;padding:10px 9px;gap:12px}.tu-playlist-time{font-size:10px}.tu-player-caption{font-size:10px;min-height:48px;gap:12px}.tu-lesson-detail{grid-template-columns:1fr;gap:26px;padding-top:24px}.tu-lesson-detail h2{font-size:23px}.tu-lesson-description{font-size:13px}.tu-lesson-actions{padding-bottom:20px;margin-top:18px}.tu-chapters{padding:0 0 22px;border-bottom:1px solid var(--tu-line)}.tu-chapters ol{grid-template-columns:1fr 1fr;gap:4px 10px}.tu-chapter{font-size:11px;padding:7px 5px;gap:8px}.tu-library{padding-top:40px;padding-bottom:43px}.tu-library-heading{align-items:flex-start;flex-direction:column;gap:20px;margin-bottom:20px}.tu-search{width:100%;min-width:0}.tu-library h2{font-size:27px}.tu-filter-bar{align-items:flex-start;flex-direction:column;gap:12px;margin-bottom:20px}.tu-filters{gap:4px}.tu-filter{font-size:10px;padding:7px 10px}.tu-results{font-size:9px}.tu-cards{grid-template-columns:1fr 1fr;gap:16px}.tu-card-content{padding:16px 15px}.tu-card-kicker{font-size:8px;gap:7px;letter-spacing:.4px}.tu-card h3{font-size:15px}.tu-card-description{font-size:11px}.tu-card-play{width:29px;height:29px;left:11px;bottom:10px}.tu-card-play svg{width:11px}.tu-card-duration{font-size:9px;right:9px;bottom:13px}.tu-support{align-items:flex-start;gap:18px;flex-direction:column;margin-top:32px;padding-top:27px}.tu-support h3{font-size:19px}.tu-support p{font-size:12px}.tu-footer{padding-top:30px}.tu-footer-top{flex-direction:column;gap:18px}.tu-footer nav{gap:13px 21px}.tu-footer nav a{font-size:11px}.tu-footer-bottom{align-items:flex-start;flex-direction:column;gap:10px;margin-top:28px;font-size:10px}.tu-hero{padding-top:32px;padding-bottom:27px}.tu-hero h1{font-size:37px;line-height:1.1}.tu-eyebrow{font-size:9px;letter-spacing:1.3px;margin-bottom:14px}}
@media(max-width:420px){.tu-wrap{padding-left:18px;padding-right:18px}.tu-hero h1{font-size:33px}.tu-hero p:not(.tu-eyebrow){font-size:13px}.tu-player-caption{align-items:flex-start;flex-direction:column;gap:5px;padding:11px 15px}.tu-lesson-actions{align-items:flex-start;flex-direction:column;gap:17px}.tu-chapters ol{grid-template-columns:1fr}.tu-cards{grid-template-columns:1fr}.tu-card-links{flex-direction:row;align-items:center}.tu-card h3{font-size:18px}.tu-card-description{font-size:12px}.tu-card-content{padding:20px}.tu-card-kicker{font-size:9px}.tu-card-downloads{font-size:10px}.tu-mobile-menu nav{padding-left:18px;padding-right:18px}.tu-transcript-lines li{gap:12px;font-size:11px;padding-left:0;padding-right:0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}