@font-face{font-family:'Instrument Sans';font-style:normal;font-weight:400 600;font-display:swap;src:url('/fonts/instrument-sans.woff2') format('woff2')}
@font-face{font-family:'Instrument Serif';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/instrument-serif-400.woff2') format('woff2')}
@font-face{font-family:'Instrument Serif';font-style:italic;font-weight:400;font-display:swap;src:url('/fonts/instrument-serif-400-italic.woff2') format('woff2')}
:root{
--bg:#fcfbf9;--bg-2:#f7f5f2;--surface:#fff;--line:#e8e6e1;--ink:#222;--muted:#5d5d5d;--faint:#767676;
--accent:#7c47e0;--accent-deep:#4b268c;--accent-soft:#edebfc;--accent-tint:#f6f4fe;--ok:#198933;--ok-soft:#d8f5df;
--r:20px;--r-s:12px;--shadow:0 1px 2px rgba(20,20,20,.04),0 10px 30px -14px rgba(20,20,20,.14);
--display:"Instrument Serif",Georgia,"Times New Roman",serif;--body:"Instrument Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
--w:1120px;--pad:clamp(16px,4vw,32px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg,video,iframe{display:block;max-width:100%}
h1,h2,h3{font-family:var(--display);font-weight:400;letter-spacing:-.01em;line-height:1.1;margin:0}
h1{font-size:clamp(34px,5vw,52px)}h2{font-size:clamp(26px,3.2vw,34px)}h3{font-size:22px}
p{margin:0 0 1em}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:6px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(252,251,249,.85);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent}
.top.line{border-bottom-color:var(--line)}
.top .in{max-width:var(--w);margin:0 auto;padding:14px var(--pad);display:flex;align-items:center;gap:20px}
.wordmark{font-family:var(--display);font-size:24px;text-decoration:none;letter-spacing:-.01em}
.top nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.top nav a{text-decoration:none;font-size:14px;font-weight:500;color:var(--muted);padding:8px 12px;border-radius:999px;transition:background .1s ease,color .1s ease}
.top nav a:hover{background:var(--bg-2);color:var(--ink)}
main{flex:1;width:100%;max-width:var(--w);margin:0 auto;padding:clamp(24px,5vw,56px) var(--pad) 80px;display:flex;flex-direction:column}
main>*{width:100%;flex:none}
footer{width:100%;max-width:var(--w);margin:0 auto;padding:0 var(--pad) 28px;color:var(--faint);font-size:13px;text-align:center}
/* avatar menu */
.menu{position:relative}
.menu summary{list-style:none;cursor:pointer;display:block;border-radius:50%}
.menu summary::-webkit-details-marker{display:none}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--bg-2);border:1px solid var(--line);color:var(--ink);display:grid;place-items:center;transition:background .1s ease,border-color .1s ease}
.avatar svg{width:18px;height:18px}
a.avatar,.top nav a.avatar{padding:0;text-decoration:none;cursor:pointer}
a.avatar:hover{background:#ecebe6;border-color:#d6d3cc}
.menu summary:hover .avatar,.menu[open] .avatar{background:#ecebe6;border-color:#d6d3cc}
.drop{position:absolute;right:0;top:44px;min-width:240px;background:var(--surface);border:1px solid #f0eee9;border-radius:14px;box-shadow:0 1px 2px rgba(20,20,20,.04),0 12px 32px -12px rgba(20,20,20,.18);padding:8px;z-index:20}
.drop .who{padding:10px 12px 12px;border-bottom:1px solid #f0eee9;margin-bottom:8px;font-size:13px;color:var(--muted);display:flex;flex-direction:column;gap:2px}
.drop .who b{color:var(--ink);font-weight:500;font-size:14px}
.drop a{display:block;padding:8px 12px;margin:2px 0;line-height:1.3;border-radius:8px;text-decoration:none;font-size:14px;color:var(--ink);transition:background .1s ease}
.drop a:hover{background:var(--bg-2)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--ink);color:#fff;border:0;border-radius:999px;height:42px;padding:0 20px;font:inherit;font-weight:500;font-size:15px;line-height:1;text-decoration:none;cursor:pointer;transition:background .1s ease,border-color .1s ease,color .1s ease;white-space:nowrap}
.btn svg{width:18px;height:18px;flex:none}
/* Icon buttons. Markup must be label or label — a bare text node
would make the svg both :first-child and :last-child (text nodes are not elements), so we key on the
span+svg order instead. Padding is 4px tighter on the icon side: the icon's box holds ~2px of empty
space around the glyph, and the eye measures ink, not boxes. Values tuned by eye on 2026-09-05. */
.btn:has(>span+svg){padding:0 16px 0 20px}
.btn:has(>svg+span){padding:0 20px 0 16px}
.btn.sm:has(>span+svg){padding:0 12px 0 16px}
.btn.sm:has(>svg+span){padding:0 16px 0 12px}
.btn:hover{background:#444}
.btn.soft{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn.soft:hover{background:var(--bg-2);border-color:#d6d3cc}
.btn.sm{padding:0 14px;height:34px;font-size:14px;gap:6px}
.btn.sm svg{width:16px;height:16px}
.btn:disabled{opacity:.6;cursor:default}
/* forms */
.field{display:block;font-size:13px;font-weight:500;color:var(--muted);margin-bottom:6px}
input[type=email],input[type=text]{width:100%;height:46px;font:inherit;font-size:16px;padding:0 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--ink);transition:border-color .1s ease,box-shadow .1s ease}
input[type=email]:focus,input[type=text]:focus{outline:none;border-color:var(--ink);box-shadow:0 0 0 4px #ecebe6}
input:disabled{background:var(--bg-2);color:var(--muted)}
/* auth screens */
main>.auth{flex:1;display:grid;place-items:center;padding-bottom:6vh}
.auth .box{width:min(440px,100%);text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:40px 36px 34px;box-shadow:var(--shadow)}
.auth h1{font-size:clamp(30px,4vw,40px);margin-bottom:10px}
.auth .lead{color:var(--ink);margin:0 0 14px;font-size:15px}
.auth .lead.muted{color:var(--muted)}
.auth .lead+.btn,.auth .lead+form{margin-top:10px}
.auth .link{margin:18px 0 0;font-size:14px}.auth .link a{color:var(--muted)}.auth .link a:hover{color:var(--ink)}
.auth .row{display:flex;flex-direction:column;gap:10px}
.auth .row input{width:100%;flex:none}
.auth .row .btn{width:100%}
.auth .help{font-size:13px;color:var(--faint);margin:18px 0 0}
.auth .help a{color:var(--muted);text-decoration:underline;text-underline-offset:3px;text-decoration-color:#d6d3cc}
.auth .help a:hover{color:var(--ink)}
.auth .alert{text-align:left}
.auth .box.left{text-align:left}
.auth .box.left h1{margin-bottom:22px}
.saved{margin-left:12px;font-size:14px;color:var(--ok)}
@media(max-width:480px){.auth .box{padding:30px 22px 26px}}
.alert{text-align:left}
@media(max-width:480px){.auth .row{flex-direction:column}.auth .row .btn{width:100%}}
.alert{display:flex;gap:10px;align-items:flex-start;background:#fff7d6;border:1px solid #f1e3a6;color:#5c4300;border-radius:var(--r-s);padding:12px 14px;margin-bottom:18px;font-size:14px;line-height:1.45;text-align:left}
.alert svg{width:20px;height:20px;flex:none;color:#b07d00;margin-top:1px}
.alert p{margin:0}
.alert b{font-weight:600;color:#3f2e00}
/* support (modal and page share this block) */
.support{text-align:center;outline:none}
.support h1{font-size:32px;margin:0 0 10px}
.support .lead{color:var(--muted);margin:0 0 22px}
.support .addr{display:block;font-family:var(--display);font-size:clamp(26px,4vw,32px);line-height:1.1;color:var(--ink);text-decoration:none;overflow-wrap:anywhere;margin:0 0 34px}
.support .addr:hover{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1px}
.support .btn{width:100%}
.support .help{font-size:13px;color:var(--faint);margin:18px 0 0}
/* modal (support) */
.modal{border:0;border-radius:24px;padding:56px 40px 36px;width:min(480px,calc(100% - 32px));background:var(--surface);color:var(--ink);box-shadow:0 24px 60px -20px rgba(20,20,20,.35)}
.modal::backdrop{background:rgba(34,34,34,.35);backdrop-filter:blur(2px)}
.modal .close{position:absolute;top:16px;right:16px;width:34px;height:34px;border-radius:50%;border:0;background:transparent;color:var(--muted);display:grid;place-items:center;cursor:pointer;transition:background .1s ease,color .1s ease}
.modal .close:hover{background:var(--bg-2);color:var(--ink)}
.modal .close svg{width:18px;height:18px}
/* cards + covers */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .1s ease}
a.card{text-decoration:none;display:block}
a.card:hover{border-color:#bdb9b1}
.cover{aspect-ratio:5/3;width:100%;display:block}
.cover text{font-family:var(--display)}
.eyebrow{font-size:14px;color:var(--muted)}
/* home */
.hero{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:34px}
.hero p{color:var(--muted);margin:6px 0 0}
.section{margin:40px 0 14px;display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.resume{display:grid;grid-template-columns:minmax(260px,400px) 1fr;gap:0;align-items:center}
.resume .cover{aspect-ratio:16/9;height:auto;align-self:stretch;object-fit:cover}
.resume img.cover{width:100%;height:100%}
.resume .body{padding:22px 28px;display:flex;flex-direction:column;justify-content:center}
.resume .body .eyebrow{font-size:13px;margin:0 0 4px}
.resume .body h2{font-size:28px;margin:0 0 6px}
.resume .body .next{color:var(--faint);font-size:14px;margin:0}
.resume .body .btn{align-self:flex-start;margin-top:20px}
@media(max-width:640px){.resume{grid-template-columns:1fr}.resume .cover{aspect-ratio:16/9}}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.grid .card .body{padding:18px 20px 20px}
.grid .card h3{font-size:24px;margin-bottom:6px}
.meta{font-size:14px;color:var(--faint);display:flex;justify-content:space-between;gap:10px}
.bar{height:6px;background:var(--bg-2);border-radius:999px;overflow:hidden;margin-top:12px}
.bar i{display:block;height:100%;background:var(--ink);border-radius:999px}
.bar.ok i{background:var(--ok)}
/* lesson rows (shared by the sidebar) */
.rows{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.rows li a{display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:14px;text-decoration:none;transition:background .1s ease}
.rows li a:hover{background:var(--bg-2)}
.rows li.cur a{background:var(--bg-2)}
.rows li.cur .name{font-weight:500}
.rows .tick{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line);flex:none;display:grid;place-items:center;background:var(--surface)}
.rows .tick.on{background:var(--ok);border-color:var(--ok)}
.rows .tick svg{width:14px;height:14px;color:#fff}
.rows .name{flex:1;min-width:0}
.rows .kind{font-size:12px;color:var(--faint);white-space:nowrap}
/* lesson page */
.lesson{display:grid;grid-template-columns:340px minmax(0,1fr);gap:clamp(20px,4vw,48px);align-items:start}
.lesson>.side{order:-1}
@media(max-width:960px){.lesson{grid-template-columns:1fr}}
.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0 0}
.toolbar .spacer{flex:1}
.tickbtn{width:34px;height:34px;border-radius:50%;border:1px solid #d6d3cc;background:var(--surface);color:#b5b2ab;display:grid;place-items:center;cursor:pointer;padding:0;transition:background .1s ease,border-color .1s ease,color .1s ease}
.tickbtn svg{width:18px;height:18px}
.tickbtn:hover{border-color:var(--ink);color:var(--ink);background:var(--bg-2)}
.tickbtn.on{background:var(--ok);border-color:var(--ok);color:#fff}
.tickbtn.on:hover{background:#15702a;border-color:#15702a;color:#fff}
.crumb:hover{color:var(--ink)}
.player{position:relative;border-radius:var(--r);overflow:hidden;background:transparent;box-shadow:var(--shadow);transform:translateZ(0)}
.player::after{content:"";position:absolute;inset:0;border-radius:var(--r);box-shadow:inset 0 0 0 1px rgba(20,20,20,.1);pointer-events:none;z-index:2}
.player video{width:100%;display:block}
.player .plyr{border-radius:0;background:transparent}
.player .plyr__video-wrapper,.player .plyr__poster,.player video{border-radius:0}
.player .plyr__poster{background-size:cover;background-color:transparent}
.player .plyr__video-wrapper{background:transparent}
.player .plyr--video{background:transparent}
.plyr{--plyr-color-main:#fff;--plyr-video-control-color:#fff;--plyr-video-control-color-hover:#fff;--plyr-video-control-background-hover:rgba(255,255,255,.18);--plyr-range-track-height:4px;--plyr-range-thumb-height:12px;--plyr-control-radius:999px;--plyr-range-fill-background:#fff;--plyr-video-progress-buffered-background:rgba(255,255,255,.3);--plyr-menu-background:#fff;--plyr-menu-color:#222;--plyr-font-family:var(--body);--plyr-font-size-base:14px;--plyr-font-size-small:13px}
.plyr--video .plyr__control.plyr__control--overlaid,.plyr--video .plyr__control.plyr__control--overlaid:hover,.plyr--video .plyr__control.plyr__control--overlaid:focus{background:rgba(255,255,255,.95);color:#222;padding:22px;opacity:1;box-shadow:0 8px 30px rgba(0,0,0,.3);transform:translate(-50%,-50%);transition:background .1s ease}
.plyr--video .plyr__control.plyr__control--overlaid:hover{background:#fff;color:#000}
.plyr--video .plyr__controls{left:14px;right:14px;bottom:14px;width:auto;padding:6px 10px;gap:2px;align-items:center;background:rgba(18,18,18,.55);backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2);border-radius:999px;box-shadow:0 8px 24px -8px rgba(0,0,0,.45)}
@media(max-width:600px){.plyr--video .plyr__controls{left:8px;right:8px;bottom:8px;padding:4px 8px}}
.plyr--video .plyr__controls>.plyr__control{padding:7px}
.plyr--video .plyr__controls .plyr__progress__container{margin-left:8px}
.plyr--video .plyr__controls .plyr__time{margin:0 4px}
.plyr__menu__container{--plyr-menu-background:rgba(24,24,24,.9);--plyr-menu-color:#fff;--plyr-menu-border-color:rgba(255,255,255,.1);--plyr-menu-border-shadow-color:transparent;--plyr-menu-shadow:0 12px 30px -10px rgba(0,0,0,.5);--plyr-menu-item-arrow-color:rgba(255,255,255,.6);--plyr-menu-back-border-color:rgba(255,255,255,.12);--plyr-menu-back-border-shadow-color:transparent;border-radius:14px;backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2)}
.plyr__menu__container .plyr__control,.plyr__menu__container .plyr__control:hover,.plyr__menu__container .plyr__control:focus-visible{color:#fff;background:transparent;border-radius:8px}
.plyr__menu__container .plyr__control:hover,.plyr__menu__container .plyr__control:focus-visible{background:rgba(255,255,255,.14)}
.plyr__menu__container .plyr__control[role=menuitemradio][aria-checked=true]::before{background:#fff}
.plyr__menu__container .plyr__control[role=menuitemradio]::before{background:rgba(255,255,255,.35)}
.plyr__menu__container .plyr__control[role=menuitemradio]:hover::before{background:rgba(255,255,255,.5)}
.plyr__menu__container .plyr__control[role=menuitemradio][aria-checked=true]::after{background:#222!important}
.plyr__menu__container .plyr__menu__value{color:rgba(255,255,255,.7)}
/* paused: only the big play button, controls come back on hover or when playing */
.plyr--video.plyr--paused:not(:hover) .plyr__controls{opacity:0;pointer-events:none;transform:translateY(6px)}
.plyr--video .plyr__controls{transition:opacity .15s ease,transform .15s ease}
.plyr :focus-visible,.plyr *:focus-visible{outline:2px solid rgba(255,255,255,.9);outline-offset:2px;border-radius:999px}
.pdfbox{border-radius:var(--r);overflow:hidden auto;max-height:72vh;scrollbar-gutter:stable;overscroll-behavior:contain;border:1px solid var(--line);background:var(--surface)}
.player+.prose,.pdfbox+.prose,.lesson-head+.prose,.toolbar+.prose{margin-top:24px}
.pdfbox iframe{width:100%;height:min(78vh,900px);border:0;background:var(--bg-2)}
.lesson-head{margin:4px 0 16px;display:flex;align-items:flex-end;justify-content:space-between;gap:16px}
.lesson-head>div{min-width:0}
.lesson-head form{flex:none;margin-bottom:4px}
.lesson-head .eyebrow{margin-bottom:6px;color:var(--faint)}
.lesson-head h1{font-size:clamp(26px,3vw,32px);line-height:1.15}
.prose{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:clamp(20px,3vw,32px);overflow-wrap:anywhere}
.prose>*{max-width:70ch}
.prose>:first-child{margin-top:0}.prose>:last-child{margin-bottom:0}
.prose h1,.prose h2,.prose h3,.prose h4{font-family:var(--body);font-weight:600;font-size:17px;margin:1.4em 0 .5em;line-height:1.35}
.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:.25em 0}.prose li>p{margin:0}
.prose a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-color:#bdb9b1}
.prose a:hover{text-decoration-color:var(--ink)}
.prose blockquote{margin:1em 0;padding:.2em 0 .2em 1em;border-left:3px solid var(--line);color:var(--muted)}
.prose table{border-collapse:collapse;width:100%;font-size:14px}.prose td,.prose th{border:1px solid var(--line);padding:8px}
.prose img{border-radius:var(--r-s)}
.prose ul.links{list-style:none;padding:0;margin:1em 0 0}
.prose ul.links li{margin:.35em 0}
.prose ul.links a{text-decoration:none;font-weight:500;border-bottom:1px solid #d6d3cc}
.prose ul.links a:hover{border-color:var(--ink)}
.prose ul.links a::after{content:" ↗";color:var(--faint);font-weight:400}
.files{margin-top:18px}
.files ul{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:8px}
.files li a{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--surface);border:1px solid var(--line);border-radius:14px;text-decoration:none;font-size:14px;transition:background .1s ease,border-color .1s ease}
.files li a:hover{background:var(--bg-2);border-color:#d6d3cc}
.files li a svg{width:20px;height:20px;flex:none;opacity:.75}
.files li a .fname{flex:1;min-width:0}
.files li a .fsize{font-size:13px;color:var(--faint);white-space:nowrap}
.files li a .dl{color:var(--faint);display:flex;margin-left:4px}
.side{position:sticky;top:76px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:0 0 8px}
.side .side-cover{border-radius:0}
.side .prog{padding:14px 16px 18px;border-bottom:1px solid var(--line);margin-bottom:6px}
.side .prog .meta{color:var(--muted)}
.side .prog .bar{margin-top:8px}
.side details{margin:0 8px;border-top:1px solid #f0eee9;padding:4px 0}
.side details:first-of-type{border-top:0}
.side summary{cursor:pointer;list-style:none;margin:0 0 2px;padding:10px 12px 10px 10px;font-size:14px;font-weight:600;line-height:1.35;display:flex;align-items:center;gap:12px;border-radius:10px;color:var(--ink);transition:background .1s ease}
.side summary:hover{background:var(--bg-2)}
.side summary .mname{flex:1;min-width:0;text-wrap:balance}
.side .mnum{width:26px;height:26px;border-radius:50%;background:var(--surface);border:1px solid #dcd9d2;color:var(--muted);font-size:12px;font-weight:600;display:grid;place-items:center;flex:none}
.side .mnum.on{background:var(--ok);color:#fff}
.side .mnum svg{width:13px;height:13px}
.side summary::-webkit-details-marker{display:none}
.side summary::after{content:"";width:8px;height:8px;border-right:1.5px solid var(--faint);border-bottom:1.5px solid var(--faint);transform:rotate(-45deg);margin-left:4px;transition:transform .1s ease}
.side details[open] summary::after{transform:rotate(45deg)}
.side .mlist{margin:0 0 8px}
.side .rows li a{padding:8px 12px 8px 10px;font-size:14px;gap:12px;border-radius:10px;color:var(--muted)}
.side .rows li a:hover{background:var(--bg-2)}
.side .rows li.cur a{background:var(--bg-2)}
.side .rows li.cur a{color:var(--ink)}
.side .rows li.cur .name{font-weight:600}
.side .rows .tick{width:26px;height:26px}.side .rows .tick svg{width:13px;height:13px}
.side .rows .kind{font-size:11px}
@media(max-width:960px){.side{position:static}.lesson>.side{order:1}}