:root{font-family:"DM Sans","Segoe UI",sans-serif;color:#27302a;background:#f6f6ef;line-height:1.5;--ink:#26352d;--sub:#526157;--line:#dce2d8;--green:#2b543e;--light:#e8eee5;--panel:#fffefa}
*{box-sizing:border-box}
body{margin:0}
.top{background:#fbfbf6;border-bottom:1px solid var(--line)}
.top-inner{display:flex;align-items:center;gap:20px;min-height:68px;margin:auto;width:min(1200px,calc(100% - 32px))}
.brand{font-family:"Instrument Serif",Georgia,serif;font-size:1.8rem;letter-spacing:.12em;text-decoration:none;color:var(--green);font-weight:600}
#app-label{color:var(--sub);font-size:.91rem}
#top-actions{display:flex;gap:8px;margin-left:auto}
.shell{max-width:1200px;margin:0 auto;padding:32px 16px 60px}
h1,h2,h3,p{margin:0 0 .65em}
h1{font-family:"Instrument Serif",Georgia,serif;font-size:clamp(2rem,4vw,3.5rem);font-weight:400;letter-spacing:-.035em;line-height:1.03}
h2{font-size:1.3rem}
h3{font-size:1rem}
button,input,textarea,select{font:inherit}
button,.button{display:inline-block;background:var(--green);color:white;padding:.56rem .85rem;border:1px solid transparent;border-radius:8px;font-size:.91rem;line-height:1.2;font-weight:600;text-decoration:none;cursor:pointer}
button.secondary,.button.secondary{background:var(--light);color:var(--ink)}
button.danger{background:#7f3936}
button:disabled{opacity:.55;cursor:wait}
:focus-visible{outline:3px solid #b18c49;outline-offset:2px}
a{color:var(--green)}
input,select,textarea{border:1px solid #bfcabf;background:#fff;border-radius:7px;padding:.52rem .6rem;max-width:100%;color:inherit}
textarea{display:block;width:100%;resize:vertical;min-height:105px}
input[type="checkbox"]{width:auto}
label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;font-weight:600;color:var(--sub)}
label.inline{display:inline-flex;flex-direction:row;align-items:center}
.bar,.row{display:flex;align-items:end;flex-wrap:wrap;gap:8px}
.bar{margin:12px 0 16px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:15px;min-width:0}
.stack>*+*{margin-top:12px}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:16px}
.sub{color:var(--sub);font-size:.9rem}
.error{color:#842f2e}
.nav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.nav a{background:var(--light);color:var(--ink)}
.nav a[aria-current="page"]{background:var(--green);color:white}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin-bottom:20px}
.metric{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:14px}
.metric strong{display:block;font-size:1.62rem}
.metric span{color:var(--sub);font-size:.82rem}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:.86rem}
th,td{text-align:left;padding:7px 9px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}
th{color:var(--sub);font-weight:650}
details{margin:0 0 9px}
summary{cursor:pointer;padding:7px 0;color:var(--green);font-weight:600}
pre,.message-text{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;margin:.2em 0 .75em}
dialog{border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--ink);width:min(560px,calc(100% - 24px));padding:22px}
dialog::backdrop{background:#12241a66}
#toast{position:fixed;bottom:18px;right:18px;max-width:min(460px,calc(100vw - 36px));color:white;background:var(--green);padding:12px 16px;border-radius:8px;z-index:3}
#toast.error{background:#842f2e;color:white}
.small-page{width:min(540px,calc(100% - 32px));margin:10vh auto;background:var(--panel);padding:26px;border:1px solid var(--line);border-radius:14px}
.course-covers{padding-left:24px}
.course-covers li{margin:0 0 18px}
.course-covers figure{margin:0}
.course-covers img{display:block;width:100%;height:auto;border-radius:8px;margin-bottom:5px}
@media(max-width:780px){.split{grid-template-columns:1fr}.top-inner{gap:10px}.shell{padding-top:22px}}
@media(max-width:410px){#app-label{display:none}.panel{padding:12px}}

[hidden]{display:none!important}

.vk-demo{
  --vk-blue:#1463bf;
  --vk-text:#172331;
  --vk-muted:#56687d;
  --vk-line:#dce5ee;
  background:#edf2f8;
  color:var(--vk-text);
  font-family:"Inter","Segoe UI",sans-serif;
}
.vk-demo .top{background:#fff;border-color:var(--vk-line)}
.vk-demo .top-inner{width:min(1200px,calc(100% - 44px));min-height:64px}
.vk-demo .brand{color:#381b29;font-size:1.55rem}
.vk-demo #app-label{color:var(--vk-muted)}
.vk-demo .shell{max-width:1244px;padding:24px 22px}
.vk-layout{display:grid;grid-template-columns:minmax(230px,300px) minmax(0,1fr);gap:24px}
.vk-guide{align-self:start;background:#fff;border:1px solid var(--vk-line);border-radius:14px;padding:22px;min-width:0}
.vk-guide-label,.vk-lesson-number{color:#794454;font-size:.83rem;font-weight:650;margin-bottom:7px}
.vk-guide h1{font-size:clamp(1.95rem,3vw,2.65rem);color:#3d202e;margin-bottom:10px}
.vk-guide-price{color:#533548;font-size:.91rem;font-weight:650}
.vk-guide-cover{border-radius:8px;overflow:hidden;margin:16px 0 18px;background:#3b1d2d}
.vk-guide-cover img{display:block;width:100%;height:auto}
.vk-guide-help{font-size:.86rem;color:var(--vk-muted)}
.vk-guide-help h2{font-size:.97rem;color:var(--vk-text);margin:0 0 5px}
.vk-guide-note{margin-top:14px}
.vk-demo-settings{border-top:1px solid var(--vk-line);padding-top:6px;margin:14px 0 0}
.vk-demo-settings summary{color:var(--vk-blue);font-size:.82rem}
.vk-time-controls{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.vk-messenger{
  height:clamp(490px,calc(100dvh - 113px),970px);
  min-width:0;display:grid;grid-template-rows:auto minmax(0,1fr) auto;
  overflow:hidden;border:1px solid var(--vk-line);border-radius:14px;background:#f1f6fc;
  box-shadow:0 8px 26px #20384e09
}
.vk-chat-head,.vk-compose{background:#fff;padding:12px 18px;display:flex;gap:12px;align-items:center}
.vk-chat-head{border-bottom:1px solid var(--vk-line)}
.vk-chat-head h2{font-size:1.09rem;margin:0;line-height:1.25}
.vk-chat-head p{font-size:.82rem;color:var(--vk-muted);margin:1px 0 0}
.vk-avatar{
  display:grid;place-items:center;flex:none;width:42px;height:42px;border:1px solid #794c58;
  border-radius:50%;background:#442537;color:#f5d29b;font:400 1.75rem/1 "Instrument Serif",Georgia,serif
}
.vk-log{position:relative;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;padding:16px 18px 18px}
.vk-day{
  display:table;margin:10px auto 16px;padding:3px 11px;border-radius:16px;
  background:#dfeaf5;color:#466784;font-size:.75rem;font-weight:650
}
.vk-message{display:flex;gap:8px;align-items:flex-end;margin-bottom:15px}
.vk-avatar-small{width:26px;height:26px;font-size:1.08rem;margin-bottom:1px}
.vk-message-content{max-width:min(520px,calc(100% - 34px));min-width:0}
.vk-bubble{
  width:fit-content;max-width:100%;display:flex;flex-direction:column;gap:5px;padding:10px 12px 7px;
  border:1px solid #e0e8f0;border-radius:13px 13px 13px 4px;background:#fff;color:var(--vk-text)
}
.vk-message-text{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font-size:.94rem;line-height:1.45}
.vk-bubble time{align-self:flex-end;color:var(--vk-muted);font-size:.7rem;line-height:1.25}
.vk-message-out{justify-content:flex-end}
.vk-message-out .vk-bubble{border-color:#d6e6fb;border-radius:13px 13px 4px 13px;background:#e1eeff}
.vk-keyboard{display:grid;gap:5px;margin-top:5px}
.vk-key-row{display:flex;flex-wrap:wrap;gap:5px}
.vk-demo :is(button,.button).vk-key{
  display:flex;justify-content:center;align-items:center;flex:1 1 auto;min-width:0;min-height:35px;
  padding:.41rem .55rem;border:1px solid #d5e3f2;border-radius:8px;color:#16579b;background:#e8f1fc;
  text-align:center;font-size:.81rem;line-height:1.25;white-space:normal;overflow-wrap:anywhere
}
.vk-demo :is(button,.button).vk-key:hover,.vk-demo button.vk-control:hover{background:#dbeafd}
.vk-demo .vk-purchase .vk-key-row:first-child button,.vk-demo .vk-key.vk-link{
  color:#fff;background:var(--vk-blue);border-color:var(--vk-blue)
}
.vk-demo .vk-purchase .vk-key-row:first-child button:hover,.vk-demo .vk-key.vk-link:hover{background:#0e53a5}
.vk-covers{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3px;margin-top:6px;width:100%;overflow:hidden;border-radius:7px}
.vk-covers.vk-single-cover{grid-template-columns:1fr}
.vk-covers button,.vk-video-card{border:0;padding:0;border-radius:0;display:block;background:#3b1f2f;overflow:hidden}
.vk-covers button img,.vk-video-card img{display:block;aspect-ratio:16/9;object-fit:cover;width:100%;height:auto}
.vk-video-card{position:relative;width:min(100%,430px);border-radius:8px;margin-top:5px;text-align:left}
.vk-video-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  display:grid;place-items:center;width:43px;height:43px;border-radius:50%;background:#101a25e8;color:#fff
}
.vk-video-title{position:absolute;bottom:0;left:0;right:0;padding:12px 10px 7px;background:linear-gradient(transparent,#141018ed);color:#fff}
.vk-empty{height:100%;display:grid;place-items:center}
.vk-demo :is(button,.button).vk-control{
  background:#e9f1fa;border:1px solid #dce7f2;color:#244a72;padding:.48rem .65rem;font-size:.8rem;white-space:nowrap
}
.vk-demo button.vk-begin{background:var(--vk-blue)}
.vk-demo :is(a,button,input):focus-visible{outline:2px solid #0967c3;outline-offset:2px}
.vk-compose{gap:8px;border-top:1px solid var(--vk-line)}
.vk-compose input{flex:1;min-width:0;padding:.58rem .68rem;border-color:#cfdceb}
.vk-compose button{align-self:stretch;display:grid;place-items:center;width:39px;padding:0;background:var(--vk-blue)}
.vk-send-arrow{width:13px;height:14px;display:block;background:#fff;clip-path:polygon(0 0,100% 50%,0 100%,22% 52%)}
.vk-media-dialog{width:min(940px,calc(100% - 24px));max-height:calc(100dvh - 24px);border-color:var(--vk-line);background:#fff;color:var(--vk-text);padding:14px}
.vk-media-dialog::backdrop{background:#132036b3}
.vk-dialog-head{display:flex;align-items:start;justify-content:space-between;gap:12px;margin-bottom:12px}
.vk-dialog-head h2{margin:0}
.vk-media-dialog :is(img,video){display:block;width:100%;max-height:73dvh;object-fit:contain;background:#281d26;border-radius:7px}
.vk-media-error{margin-top:8px;font-size:.88rem}
@media(max-width:780px){
  .vk-layout{grid-template-columns:1fr;gap:16px}
  .vk-messenger{order:-1;height:max(365px,calc(100dvh - 94px))}
  .vk-guide-cover{max-width:380px}
  .vk-demo .shell{padding:14px}
}
@media(max-width:490px){
  .vk-demo .top-inner{width:calc(100% - 24px);min-height:54px;gap:8px}
  .vk-demo #app-label{display:none}
  .vk-demo #top-actions{gap:5px}
  .vk-demo .shell{padding:8px}
  .vk-messenger{height:max(365px,calc(100dvh - 70px));border-radius:11px}
  .vk-chat-head,.vk-compose{padding:9px 10px;gap:7px}
  .vk-log{padding:10px 7px 10px 8px;scrollbar-gutter:auto}
  .vk-message{gap:5px}
  .vk-avatar-small{width:20px;height:20px;font-size:.82rem}
  .vk-message-content{max-width:calc(100% - 25px)}
  .vk-message-text{font-size:.88rem}
  .vk-covers{grid-template-columns:repeat(2,minmax(0,1fr))}
  .vk-demo :is(button,.button).vk-key{font-size:.78rem}
}