.unit-lesson-link{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 13px;padding:15px 17px;border:1px solid #cfdcff;border-radius:17px;background:linear-gradient(120deg,#f0efff,#e9fbff);color:#2e3971;transition:.2s}
.unit-lesson-link:hover{transform:translateY(-2px);border-color:#aaa6fb;box-shadow:0 10px 24px rgba(81,70,229,.12)}
.unit-lesson-link small{display:block;margin-bottom:4px;color:#6d73a3;font-size:9px;font-weight:950;letter-spacing:.08em;text-transform:uppercase}.unit-lesson-link b{display:block;font-size:14px;line-height:1.35}.unit-lesson-link strong{flex:0 0 auto;padding:8px 11px;border-radius:11px;background:#5146e5;color:#fff;font-size:11px}.unit-roadmap .topic-cloud{margin-top:18px;padding:16px}
.unit-lesson-summary{display:grid;grid-template-columns:minmax(170px,.34fr) 1fr;align-items:start;cursor:default}.unit-lesson-summary:hover{transform:none;box-shadow:none}.unit-lesson-summary p{margin:0;color:#5b6881;font-size:13px;line-height:1.65}.topic-chip--label{cursor:default}.topic-chip--label:hover{transform:none;border-color:#dfe8f5;color:#4e5d74;box-shadow:none}
.class-chat-invite{display:grid;grid-template-columns:168px 1fr auto;gap:20px;align-items:center;margin-top:28px;padding:14px;border:1px solid #cfdcff;border-radius:26px;background:linear-gradient(125deg,#fff,#eeedff 52%,#e5fbff);box-shadow:0 18px 46px rgba(64,74,137,.12)}.class-chat-visual{position:relative;height:108px;overflow:hidden;border-radius:19px;background:#dfe9ff}.class-chat-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(10,28,69,.2),transparent 60%)}.class-chat-visual img{width:100%;height:100%;object-fit:cover}.class-chat-orb{display:grid;width:66px;height:66px;place-items:center;border-radius:22px;background:linear-gradient(145deg,#5146e5,#12bde7);color:#fff;font-size:29px;box-shadow:0 14px 32px rgba(81,70,229,.24)}.class-chat-visual .class-chat-orb{position:absolute;z-index:1;left:10px;bottom:10px;width:48px;height:48px;border:1px solid rgba(255,255,255,.7);border-radius:16px;font-size:22px;box-shadow:0 10px 24px rgba(33,36,113,.3)}.class-chat-invite small{display:block;color:#676f9f;font-size:10px;font-weight:950;letter-spacing:.08em;text-transform:uppercase}.class-chat-invite h2{margin:5px 0 4px;font-size:23px;letter-spacing:-.025em}.class-chat-invite p{margin:0;color:#687891;font-size:13px;line-height:1.55}.learning-page .class-chat-open{display:inline-flex;min-height:47px;padding:0 17px;align-items:center;justify-content:center;border-radius:15px;background:#15245d;color:#fff;font-size:13px;font-weight:950}.learning-page .class-chat-open:hover,.learning-page .class-chat-open:focus-visible{color:#fff;background:#223779}
.chat-page-shell{max-width:980px;margin:auto}.chat-heading{display:flex;align-items:center;gap:16px;margin-bottom:18px}.chat-heading .class-chat-orb{flex:0 0 66px}.chat-heading h1{margin:0;font-size:clamp(34px,5vw,55px);line-height:1;letter-spacing:-.04em}.chat-heading p{margin:8px 0 0;color:#66768e;line-height:1.55}.chat-window{overflow:hidden;border:1px solid #d9e4f3;border-radius:30px;background:rgba(255,255,255,.96);box-shadow:0 25px 68px rgba(58,79,126,.14)}.chat-messages{display:flex;min-height:430px;max-height:600px;padding:24px;gap:14px;flex-direction:column;overflow-y:auto;background:radial-gradient(circle at 8% 0,rgba(83,211,241,.14),transparent 25%),linear-gradient(180deg,#f8fbff,#f5f3ff)}.chat-row{display:flex;gap:10px;align-items:flex-end}.chat-row.user{justify-content:flex-end}.chat-avatar{display:grid;width:34px;height:34px;flex:0 0 34px;place-items:center;border-radius:12px;background:#5146e5;color:#fff;font-size:15px}.chat-bubble{max-width:min(720px,82%);padding:14px 16px;border:1px solid #dbe5f3;border-radius:18px 18px 18px 6px;background:#fff;color:#34445f;font-size:14px;line-height:1.7;box-shadow:0 8px 22px rgba(58,79,126,.07)}.chat-row.user .chat-bubble{border:0;border-radius:18px 18px 6px 18px;background:linear-gradient(120deg,#5146e5,#2f6dde);color:#fff}.chat-results{display:grid;gap:8px;margin-top:10px}.chat-result{display:block;padding:10px 12px;border:1px solid #dbe5f3;border-radius:12px;background:#f8fbff}.chat-result b{display:block;color:#3027b8;font-size:13px}.chat-result span{display:block;margin-top:3px;color:#6b7890;font-size:11px}.chat-quick{display:flex;gap:8px;padding:14px 18px 0;overflow-x:auto;background:#fff}.chat-quick button{flex:0 0 auto;padding:9px 12px;border:1px solid #dbe5f3;border-radius:999px;background:#f7f9fd;color:#4c5c76;font-size:11px;font-weight:850;cursor:pointer}.chat-form{display:grid;grid-template-columns:1fr auto;gap:10px;padding:14px 18px 18px;background:#fff}.chat-form input{min-width:0;min-height:52px;padding:0 17px;border:1px solid #d6e2f2;border-radius:16px;background:#f9fbff;outline:none}.chat-form input:focus{border-color:#8e8afa;box-shadow:0 0 0 4px rgba(81,70,229,.1)}.chat-form button{min-width:105px;border:0;border-radius:16px;background:linear-gradient(120deg,#5146e5,#12bde7);color:#fff;font-weight:950;cursor:pointer}.chat-privacy{margin:13px 3px 0;color:#78869a;font-size:11px;line-height:1.6}
.chat-safety{margin:0 0 16px;padding:15px 17px;border:1px solid #bae4d6;border-radius:17px;background:#effff9;color:#256b57;font-size:12px;line-height:1.65}.chat-status{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 18px;border-bottom:1px solid #e2eaf5;background:#fff;color:#63728a;font-size:11px}.chat-status span{display:flex;align-items:center;gap:7px;font-weight:900}.chat-status i{width:9px;height:9px;border-radius:50%;background:#12a776;box-shadow:0 0 0 5px rgba(18,167,118,.1)}.chat-status b{color:#424f68}.chat-meta{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:4px;font-size:10px}.chat-meta b{font-size:11px}.chat-meta span{opacity:.7}.chat-bubble p{margin:0}.chat-report{margin-top:8px;padding:0;border:0;background:transparent;color:#8b96a8;font-size:9px;font-weight:900;cursor:pointer}.chat-row.user .chat-meta,.chat-row.user .chat-report{color:#fff}.chat-row.reported{opacity:.45}.chat-empty{margin:auto;color:#7b899e;font-size:13px;font-weight:800;text-align:center}.chat-error{display:none;margin:0 18px 17px;padding:11px 13px;border-radius:12px;background:#fff0f2;color:#b32438;font-size:12px;font-weight:850}.chat-error.show{display:block}.chat-closed{padding:28px;border:1px solid #e2e8f1;border-radius:24px;background:#fff;color:#64748b;text-align:center;font-weight:850}
.chat-auth[hidden],.chat-window[hidden]{display:none}.chat-auth{padding:clamp(20px,4vw,34px);border:1px solid #d6e1f3;border-radius:30px;background:rgba(255,255,255,.96);box-shadow:0 24px 65px rgba(58,79,126,.14)}.chat-auth-head{display:flex;align-items:flex-start;gap:15px}.chat-auth-head>span{display:grid;width:54px;height:54px;flex:0 0 54px;place-items:center;border-radius:17px;background:linear-gradient(145deg,#5146e5,#12bde7);font-size:24px}.chat-auth-head small{color:#696ca0;font-size:10px;font-weight:950;letter-spacing:.08em;text-transform:uppercase}.chat-auth-head h2{margin:4px 0 5px;font-size:27px;letter-spacing:-.03em}.chat-auth-head p{margin:0;color:#687891;font-size:13px;line-height:1.6}.chat-auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:23px 0 15px;padding:5px;border-radius:16px;background:#eff3fa}.chat-auth-tabs button{min-height:43px;border:0;border-radius:12px;background:transparent;color:#5f6d84;font-weight:900;cursor:pointer}.chat-auth-tabs button.active{background:#fff;color:#4037c2;box-shadow:0 8px 20px rgba(65,82,126,.1)}.chat-auth-form{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;align-items:end}.chat-auth-form[hidden]{display:none}.chat-auth-form label{display:grid;gap:6px;color:#4a5b74;font-size:11px;font-weight:900}.chat-auth-form input{width:100%;min-height:50px;padding:0 14px;border:1px solid #d6e2f2;border-radius:14px;background:#f9fbff;color:#17233c;outline:0}.chat-auth-form input:focus{border-color:#8e8afa;box-shadow:0 0 0 4px rgba(81,70,229,.1)}.chat-auth-form>button{min-height:50px;padding:0 17px;border:0;border-radius:14px;background:linear-gradient(120deg,#5146e5,#12bde7);color:#fff;font-weight:950;cursor:pointer}.chat-auth-form>button:disabled{opacity:.55}.chat-alias-suggestions{grid-column:1/-1;display:flex;gap:7px;flex-wrap:wrap}.chat-alias-suggestions button{padding:7px 10px;border:1px solid #dce5f3;border-radius:999px;background:#fff;color:#5148d1;font-size:10px;font-weight:900;cursor:pointer}.chat-auth-error{display:none;margin-top:13px;padding:11px 13px;border-radius:12px;background:#fff0f2;color:#b32438;font-size:12px;font-weight:850}.chat-auth-error.show{display:block}.chat-auth-note{margin:14px 0 0;color:#7a879a;font-size:10px;line-height:1.55}.chat-status>div{display:flex;align-items:center;gap:10px}.chat-status strong{color:#3027b8}.chat-logout{padding:6px 9px;border:1px solid #dbe4f1;border-radius:9px;background:#f6f8fc;color:#6b7890;font-size:10px;font-weight:900;cursor:pointer}
@media(max-width:760px){.class-chat-invite{grid-template-columns:1fr;padding:12px}.class-chat-visual{height:170px}.class-chat-invite>div:not(.class-chat-visual){padding:4px 5px}.class-chat-open{width:100%}.chat-heading{align-items:flex-start}.chat-messages{min-height:390px;padding:15px}.chat-bubble{max-width:88%}.chat-form,.chat-auth-form{grid-template-columns:1fr}.chat-form button,.chat-auth-form>button{min-height:48px}.chat-status{align-items:flex-start;flex-direction:column}.chat-status>div{width:100%;justify-content:space-between}.unit-lesson-link{align-items:flex-start;flex-direction:column}.unit-lesson-summary{display:flex}.unit-lesson-link strong{width:100%;text-align:center}}
.chat-spam-field{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important;opacity:0!important;pointer-events:none!important}