:root{
  --night:#170f3a; --deep:#22164c; --ink:#2a1840; --plum:#6b2d6e;
  --sun:#ffc94b; --amber:#fca248; --coral:#f08572;
  --text:#f6eef8; --mut:#cbbfdb; --line:rgba(255,255,255,.12);
  --c1:#ffc94b; --c2:#fca248; --c3:#f08572;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{height:100%}
body{min-height:100%;font-family:'Work Sans',system-ui,-apple-system,sans-serif;font-size:17px;line-height:1.65;color:var(--text);
  background:radial-gradient(900px 520px at 85% -10%,rgba(176,78,114,.35),transparent 70%),radial-gradient(700px 500px at 0% 110%,rgba(252,162,72,.14),transparent 70%),var(--night);background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body.is-locked main,body.is-locked .bar{visibility:hidden}
a{color:inherit}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--sun);outline-offset:3px;border-radius:6px}
.wrap{width:min(1040px,100% - 40px);margin-inline:auto}
.serif{font-family:'Lora',Georgia,serif;font-style:italic;font-weight:400}

/* top bar */
.bar{border-bottom:1px solid var(--line)}
.bar-in{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0}
.brand{font-family:'Lora',Georgia,serif;font-style:italic;font-size:20px;text-decoration:none}
.bar-r{display:flex;align-items:center;gap:18px;font-size:15px}
.who{color:var(--mut);max-width:40vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.link{background:none;border:0;color:var(--text);font:inherit;cursor:pointer;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(255,255,255,.35)}
.link:hover{text-decoration-color:var(--sun)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font:600 16px/1.2 'Work Sans',system-ui,sans-serif;color:#2a1840;
  background:linear-gradient(135deg,#ffe08a 0%,#ffc94b 45%,#fca248 100%);border:0;border-radius:999px;padding:16px 30px;cursor:pointer;text-decoration:none;
  box-shadow:0 10px 28px rgba(252,162,72,.28);transition:filter .2s,transform .2s}
.btn:hover{filter:brightness(1.06)}
.btn[disabled]{opacity:.6;cursor:wait}

/* login */
.auth{min-height:calc(100vh - 80px);display:grid;place-items:center;padding:48px 0}
.auth-card{width:min(440px,100%);background:linear-gradient(160deg,#2c1b5c,#22164c);border:1px solid var(--line);border-radius:26px;padding:40px 34px;box-shadow:0 30px 80px rgba(10,6,30,.5)}
.auth h1{font-weight:300;font-size:32px;line-height:1.15;margin-bottom:8px}
.auth p.sub{color:var(--mut);margin-bottom:28px}
.field{display:block;margin-bottom:18px}
.field span{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field input{width:100%;font:inherit;color:var(--text);background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.field input:focus{outline:none;border-color:var(--sun);background:rgba(255,255,255,.09)}
.auth .btn{width:100%;margin-top:6px}
.auth-row{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:18px;font-size:15px}
.msg{min-height:24px;font-size:15px;margin-top:14px;color:#ffb3a3}
.msg.ok{color:#bfe8b0}

/* panel */
.hello{padding:64px 0 28px}
.hello h1{font-weight:300;font-size:clamp(34px,5vw,54px);line-height:1.08;letter-spacing:-.01em}
.hello p{color:var(--mut);margin-top:12px;max-width:560px}
.path{list-style:none;display:grid;gap:16px;padding-bottom:80px}
.step{--c:var(--c1);display:grid;grid-template-columns:72px 1fr auto;align-items:center;gap:22px;text-decoration:none;
  padding:22px 26px;border-radius:22px;border:1px solid var(--line);background:rgba(255,255,255,.04);transition:background .2s,border-color .2s}
.step:hover{background:rgba(255,255,255,.07);border-color:color-mix(in srgb,var(--c) 55%,transparent)}
.step.p2{--c:var(--c2)} .step.p3{--c:var(--c3)}
.orb{width:72px;height:72px;border-radius:50%;display:grid;place-items:center;
  background:radial-gradient(circle at 35% 30%,#fff6e0 0%,var(--c) 70%);box-shadow:0 10px 30px color-mix(in srgb,var(--c) 40%,transparent)}
.orb b{font:600 22px/1 'Work Sans',sans-serif;color:#2a1840}
.step h2{font-weight:400;font-size:22px;line-height:1.25}
.step .sk{font-family:'Lora',Georgia,serif;font-style:italic;color:var(--mut);font-size:16px}
.state{font-size:14px;font-weight:600;padding:7px 14px;border-radius:999px;border:1px solid var(--line);color:var(--mut);white-space:nowrap}
.state.done{color:#2a1840;background:var(--c);border-color:transparent}

/* class page */
.lesson-head{padding:44px 0 8px}
.back{font-size:15px;color:var(--mut);text-decoration:none}
.back:hover{color:var(--text)}
.lesson-head h1{font-weight:300;font-size:clamp(32px,4.6vw,50px);line-height:1.1;margin-top:18px}
.lesson-head .sk{font-family:'Lora',Georgia,serif;font-style:italic;font-size:20px;color:var(--c,var(--sun));margin-top:4px}
body.p1{--c:var(--c1)} body.p2{--c:var(--c2)} body.p3{--c:var(--c3)}
.part{padding:36px 0 8px}
.part-h{display:flex;align-items:baseline;gap:14px;margin-bottom:6px}
.part-h .n{font-weight:600;color:var(--c)}
.part-h h2{font-weight:400;font-size:24px}
.part p.d{color:var(--mut);max-width:640px;margin-bottom:18px}
.player{position:relative;aspect-ratio:16/9;border-radius:20px;overflow:hidden;background:#0f0a28;border:1px solid var(--line)}
.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.soon{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:24px;color:var(--mut)}
.seen{display:none;margin-top:12px;font-size:15px;color:var(--c)}
.seen.on{display:block}
.pager{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:48px 0 90px;border-top:1px solid var(--line);margin-top:48px}
.pager a{text-decoration:none}
.pager .btn{padding:14px 26px}

@media (max-width:620px){
  body{font-size:16px}
  .step{grid-template-columns:52px 1fr;gap:16px;padding:18px}
  .orb{width:52px;height:52px}.orb b{font-size:18px}
  .state{grid-column:2;justify-self:start}
  .auth-card{padding:32px 22px}
  .who{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}