:root{
  --bg:#0A0809;--bg2:#140a0a;--panel:rgba(243,211,221,.05);--line:rgba(243,211,221,.16);--line2:rgba(243,211,221,.32);
  --text:#F3D3DD;--muted:rgba(243,211,221,.6);--red:#B3262E;--wine:#6E1328;--ok:#4FA3A0;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html{background:#0A0809}
body{margin:0;position:relative;background:transparent;color:var(--text);font-family:'Oswald','Arial Narrow',sans-serif;font-weight:300;font-size:17px;line-height:1.5;min-height:100vh}
body:before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(rgba(10,8,9,.78),rgba(10,8,9,.6) 30%,rgba(10,8,9,.5) 60%,rgba(10,8,9,.62)),url(../assets/bg-stack.jpg) center top/100% 100% no-repeat}
a{color:var(--text)}
img{max-width:100%}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 16px;max-width:1100px;margin:0 auto}
.brand{font-family:'Anton',sans-serif;text-transform:uppercase;letter-spacing:.04em;font-size:20px;text-decoration:none;line-height:1}
.brand span{color:var(--red)}
.nav{display:flex;gap:clamp(10px,2.4vw,18px);white-space:nowrap;align-items:center;font-family:'Space Mono',ui-monospace,monospace;font-size:12px;text-transform:uppercase;letter-spacing:.08em}
.nav a,.nav button{color:var(--muted);text-decoration:none;background:none;border:0;font:inherit;letter-spacing:inherit;text-transform:inherit;cursor:pointer;padding:6px 0}
.nav a:hover,.nav button:hover{color:var(--text)}
.label{font-family:'Space Mono',ui-monospace,monospace;font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
h1,.h1{font-family:'Anton',sans-serif;font-weight:400;text-transform:uppercase;line-height:.92;margin:0;font-size:clamp(44px,9vw,120px);letter-spacing:.005em}
h2,.h2{font-family:'Anton',sans-serif;font-weight:400;text-transform:uppercase;line-height:.95;margin:0;font-size:clamp(28px,4.4vw,52px)}
h3{font-family:'Oswald',sans-serif;font-weight:500;text-transform:uppercase;letter-spacing:.06em;font-size:15px;margin:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border:0;background:var(--wine);color:var(--text);font-family:'Anton',sans-serif;font-size:18px;letter-spacing:.24em;text-transform:uppercase;cursor:pointer;text-decoration:none;transition:background .3s,letter-spacing .4s}
.btn:hover{background:var(--red);letter-spacing:.3em}
.btn:disabled{opacity:.5;cursor:default}
.btn.ghost{background:transparent;border:1px solid var(--line2)}
.btn.ghost:hover{background:rgba(243,211,221,.08)}
.btn.small{min-height:40px;padding:0 18px;font-size:14px;letter-spacing:.18em}
.field{display:flex;flex-direction:column;gap:6px}
input[type=text],input[type=email],input[type=password],input[type=url],textarea,select{width:100%;min-height:52px;padding:10px 4px;background:transparent;border:0;border-bottom:1px solid var(--line2);color:var(--text);font-family:'Oswald',sans-serif;font-size:18px;font-weight:300;outline:none;border-radius:0}
textarea{min-height:110px;resize:vertical;border:1px solid var(--line2);padding:12px}
input:focus,textarea:focus,select:focus{border-color:var(--text)}
select option{background:var(--bg2)}
::placeholder{color:rgba(243,211,221,.38)}
.msg{font-size:15px;min-height:22px}
.msg.err{color:#ff8f96}
.msg.ok{color:var(--ok)}
.panel{background:rgba(14,7,8,.6);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid var(--line);padding:clamp(16px,3vw,28px)}
.stack{display:flex;flex-direction:column;gap:16px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.muted{color:var(--muted)}
.hide{display:none!important}
.center{min-height:calc(100vh - 80px);display:flex;align-items:center;justify-content:center;padding:24px 16px 60px}
.card{width:100%;max-width:440px}
.tabs{display:flex;gap:22px;margin:22px 0 8px}
.tabs button{background:none;border:0;padding:6px 0;color:var(--muted);font-family:'Space Mono',monospace;font-size:12px;text-transform:uppercase;letter-spacing:.1em;cursor:pointer;border-bottom:1px solid transparent}
.tabs button.on{color:var(--text);border-color:var(--red)}
.linkbtn{background:none;border:0;padding:0;color:var(--muted);font:inherit;font-size:14px;text-decoration:underline;cursor:pointer}

/* dashboard */
.hello{padding:clamp(30px,6vw,70px) 0 clamp(20px,4vw,40px)}
.progressbar{height:3px;background:var(--line);margin-top:22px;max-width:520px}
.progressbar i{display:block;height:100%;background:var(--red);transition:width .6s}
.module{border-top:1px solid var(--line);padding:clamp(22px,4vw,40px) 0}
.module-head{display:flex;align-items:baseline;gap:clamp(12px,2.4vw,26px);margin-bottom:18px}
.module-head h2{color:var(--red);text-shadow:0 2px 22px rgba(0,0,0,.65)}
.module-num{font-family:'Anton',sans-serif;font-size:clamp(56px,9vw,110px);line-height:.74;color:var(--red)}
.lessons{list-style:none;margin:0;padding:0;display:grid;gap:1px;border:1px solid var(--line)}
.lessons a{display:grid;grid-template-columns:64px 1fr auto;gap:14px;align-items:center;padding:16px 18px;background:rgba(14,7,8,.62);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);text-decoration:none;transition:background .25s}
.lessons a:hover{background:rgba(110,19,40,.55)}
.lessons .code{font-family:'Space Mono',monospace;font-size:12px;color:var(--muted);text-transform:uppercase}
.lessons .t{font-size:clamp(17px,2vw,21px);line-height:1.25}
.lessons .st{font-family:'Space Mono',monospace;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);white-space:nowrap}
.lessons .st.done{color:var(--ok)}
.lessons .st.new{color:#ff8f96}
@media (max-width:560px){.lessons a{grid-template-columns:44px 1fr;padding:14px}.lessons .st{grid-column:2}}

/* lesson */
.lesson-head{padding:clamp(18px,4vw,40px) 0 18px}
.player{position:relative;width:100%;aspect-ratio:16/9;background:#000;overflow:hidden;user-select:none}
.player iframe{position:absolute;left:0;width:100%;border:0;top:-60px;height:calc(100% + 120px);pointer-events:none}
.player .shield{position:absolute;inset:0;z-index:2;cursor:pointer}
.player .bigplay{position:absolute;inset:0;z-index:3;display:flex;align-items:center;justify-content:center;background:rgba(10,8,9,.55);cursor:pointer;transition:opacity .3s}
.player .bigplay span{width:84px;height:84px;border-radius:50%;border:1px solid var(--text);display:flex;align-items:center;justify-content:center}
.player .bigplay span:after{content:"";margin-left:6px;border-style:solid;border-width:13px 0 13px 21px;border-color:transparent transparent transparent var(--text)}
.player.playing .bigplay{opacity:0;pointer-events:none}
.player .bar{position:absolute;left:0;right:0;bottom:0;z-index:4;display:flex;align-items:center;gap:12px;padding:10px 14px;background:linear-gradient(transparent,rgba(0,0,0,.75));font-family:'Space Mono',monospace;font-size:12px;opacity:0;transition:opacity .3s}
.player:hover .bar,.player.paused .bar,.player.touch .bar{opacity:1}
.player .bar button{background:none;border:0;color:var(--text);font:inherit;cursor:pointer;padding:4px 2px;min-width:28px}
.player .seek{flex:1;height:18px;display:flex;align-items:center;cursor:pointer}
.player .seek i{display:block;height:3px;width:100%;background:rgba(243,211,221,.25);position:relative}
.player .seek b{position:absolute;left:0;top:0;bottom:0;background:var(--red)}
.player:fullscreen{aspect-ratio:auto}
.player.fake-fs{position:fixed;inset:0;z-index:100;aspect-ratio:auto;height:100%}
.novideo{display:flex;align-items:center;justify-content:center;text-align:center;padding:20px;color:var(--muted);font-family:'Space Mono',monospace;font-size:13px;text-transform:uppercase;letter-spacing:.08em}
.lesson-grid{display:grid;grid-template-columns:1fr;gap:clamp(20px,3vw,32px);padding:clamp(20px,3vw,32px) 0 60px}
.pager{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.thumbs{display:flex;flex-wrap:wrap;gap:10px}
.thumbs img{width:110px;height:110px;object-fit:cover;border:1px solid var(--line);cursor:zoom-in}
.reply{border-left:2px solid var(--red);padding:6px 0 6px 16px}
.q{border-top:1px solid var(--line);padding:14px 0}
.q .who{font-family:'Space Mono',monospace;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.q .who b{color:var(--red);font-weight:400}
.q p{margin:6px 0 0;white-space:pre-wrap}
.lightbox{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.92);display:flex;align-items:center;justify-content:center;padding:16px;cursor:zoom-out}
.lightbox img{max-height:100%;max-width:100%}
.file{position:relative;overflow:hidden}
.file input{position:absolute;inset:0;opacity:0;cursor:pointer}

/* admin */
.admin-tabs{display:flex;gap:24px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin:24px 0}
.admin-tabs button{background:none;border:0;border-bottom:2px solid transparent;color:var(--muted);padding:10px 0;font-family:'Anton',sans-serif;font-size:20px;text-transform:uppercase;letter-spacing:.06em;cursor:pointer}
.admin-tabs button.on{color:var(--text);border-color:var(--red)}
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th{text-align:left;font-family:'Space Mono',monospace;font-size:11px;font-weight:400;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:8px 10px;border-bottom:1px solid var(--line2)}
.table td{padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top;overflow-wrap:anywhere}
.tag{display:inline-block;font-family:'Space Mono',monospace;font-size:10px;text-transform:uppercase;letter-spacing:.08em;border:1px solid var(--line2);padding:2px 7px}
.tag.red{border-color:var(--red);color:#ff8f96}
.tag.ok{border-color:var(--ok);color:var(--ok)}
.hw{border-top:1px solid var(--line);padding:20px 0}
.lesson-edit{display:grid;grid-template-columns:70px 1fr;gap:10px 16px;border-top:1px solid var(--line);padding:18px 0}
@media (max-width:640px){.table thead{display:none}.table tr{display:block;border-bottom:1px solid var(--line);padding:8px 0}.table td{display:block;border:0;padding:4px 0}.lesson-edit{grid-template-columns:1fr}}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);background:var(--wine);color:var(--text);padding:12px 20px;font-size:15px;z-index:60;max-width:calc(100% - 32px)}