:root{--navy:#052744;--navy2:#0a3a62;--yellow:#fdbd00;--ink:#142033;--muted:#667085;--bg:#f5f7fb;--white:#fff;--green:#159a55;--red:#c83737;--border:#dce3eb;--shadow:0 14px 35px rgba(5,39,68,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--ink)}a{text-decoration:none;color:inherit}.topbar{height:78px;background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;display:flex;align-items:center;padding:10px 5%;position:sticky;top:0;z-index:50;box-shadow:0 4px 16px #0002}.brand{display:flex;align-items:center;gap:10px}.brand img{width:53px;height:53px;object-fit:contain}.brand b{font-size:26px}.brand i{color:var(--yellow);font-style:normal}.brand small{display:block;font-size:11px;font-weight:400;color:#e8eef5}.topnav{margin-left:auto;display:flex;gap:8px;align-items:center}.topnav a{padding:10px 12px;border-radius:10px;font-size:14px}.topnav a:hover{background:#fff2}.topnav .logout{border:1px solid #ffffff50}.menu-btn{display:none;margin-left:auto;background:none;border:0;color:#fff;font-size:24px}.corner-seal{width:31px;height:31px;object-fit:contain;margin-left:12px;opacity:.9}.container{width:min(1160px,92%);margin:28px auto 90px}.hero{background:linear-gradient(135deg,var(--navy),#0d456f);color:#fff;border-radius:25px;padding:34px;display:grid;grid-template-columns:1.4fr .6fr;gap:20px;align-items:center;box-shadow:var(--shadow);overflow:hidden;position:relative}.hero:after{content:"";position:absolute;width:290px;height:290px;border:2px solid #ffffff16;border-radius:50%;right:-90px;top:-80px}.hero h1{font-size:40px;margin:4px 0}.hero h1 span,.yellow{color:var(--yellow)}.professor{width:210px;height:210px;border-radius:50%;background:linear-gradient(145deg,#fff,#dfe7ef);display:grid;place-items:center;font-size:92px;border:7px solid #ffffff24;margin:auto;position:relative}.professor:after{content:"UA";position:absolute;bottom:14px;right:16px;background:var(--yellow);color:var(--navy);font-weight:800;font-size:12px;padding:7px;border-radius:50%}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px}.grid.two{grid-template-columns:repeat(2,1fr)}.card,.panel{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:0 8px 24px rgba(16,24,40,.05)}.card h1,.card h2,.card h3{margin-top:0}.kpi{font-size:34px;font-weight:800;color:var(--navy)}.muted{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:11px;padding:12px 18px;background:var(--yellow);color:#13243a;font-weight:800;cursor:pointer}.btn:hover{filter:brightness(.97);transform:translateY(-1px)}.btn.secondary{background:var(--navy);color:#fff}.btn.ghost{background:#eef3f8;color:var(--navy)}.btn.danger{background:#ffe8e8;color:#a32020}.btn.small{padding:8px 11px;font-size:13px}.progress{height:10px;background:#edf1f5;border-radius:99px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--green),#36c478);border-radius:99px}.badge{display:inline-flex;padding:5px 9px;border-radius:99px;background:#eaf1ff;color:#244f9e;font-size:12px;font-weight:700}.field{margin:14px 0}.field label{display:block;font-weight:700;font-size:13px;margin-bottom:7px}.field input,.field select,.field textarea{width:100%;padding:12px;border:1px solid #cfd8e3;border-radius:10px;font:inherit;background:#fff}.field textarea{min-height:100px;resize:vertical}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 16px}.login{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.login-brand{background:linear-gradient(150deg,var(--navy),#0b416c);color:#fff;display:grid;place-items:center;text-align:center;padding:40px}.login-brand img{width:150px}.login-brand h1{font-size:58px;margin:16px 0 4px}.login-brand h1 span{color:var(--yellow)}.login-card{display:grid;place-items:center;padding:30px}.login-card form{width:min(430px,100%)}.alert{padding:12px 14px;border-radius:10px;margin-bottom:14px}.alert.success{background:#e9f8ef;color:#15663b}.alert.error{background:#ffeded;color:#9c2222}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;background:#fff}.table th,.table td{padding:12px;border-bottom:1px solid #e8edf2;text-align:left;vertical-align:top}.table th{background:#f8fafc;color:#344054;font-size:13px}.actions{display:flex;gap:7px;flex-wrap:wrap}.scenario-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.scenario{display:flex;gap:15px;align-items:center;background:#fff;border:1px solid var(--border);border-radius:16px;padding:17px;box-shadow:0 6px 20px #102a4310}.scenario:hover{border-color:var(--yellow);transform:translateY(-2px)}.scenario .icon{width:54px;height:54px;border-radius:14px;background:#fff4ca;display:grid;place-items:center;font-size:27px}.scenario .body{flex:1}.scenario h3{margin:0 0 5px}.conversation-shell{display:grid;grid-template-columns:320px 1fr;gap:18px}.teacher-card{text-align:center;background:linear-gradient(150deg,var(--navy),#0c466f);color:#fff}.chat{height:470px;overflow:auto;background:#f8fafc;border-radius:14px;padding:17px}.bubble{max-width:80%;padding:12px 14px;border-radius:16px;margin:10px 0;line-height:1.45}.bubble.ai{background:#fff;border:1px solid var(--border)}.bubble.user{background:var(--navy);color:#fff;margin-left:auto}.controls{display:flex;gap:10px;align-items:center;margin-top:12px}.controls input{flex:1;padding:13px;border:1px solid #ccd6e0;border-radius:12px}.mic{width:54px;height:54px;border-radius:50%;border:0;background:var(--yellow);font-size:24px;cursor:pointer}.score{width:150px;height:150px;border-radius:50%;display:grid;place-items:center;margin:15px auto;background:conic-gradient(var(--green) 0 92%,#e7ebef 92%);position:relative}.score:after{content:"";position:absolute;inset:13px;background:#fff;border-radius:50%}.score strong{z-index:2;font-size:45px;color:var(--navy)}.footer{background:var(--navy);color:#fff;display:flex;align-items:center;gap:12px;padding:18px 5%;font-size:13px}.footer img{width:35px}.footer strong{margin-left:auto;color:var(--yellow)}.empty{text-align:center;padding:40px;color:var(--muted)}@media(max-width:850px){.topnav{display:none;position:absolute;top:78px;left:0;right:0;background:var(--navy);padding:15px;flex-direction:column;align-items:stretch}.topnav.open{display:flex}.menu-btn{display:block}.corner-seal{display:none}.grid,.grid.two,.scenario-list,.conversation-shell,.hero,.login{grid-template-columns:1fr}.hero{text-align:center}.professor{width:160px;height:160px}.login-brand{min-height:310px}.login-brand h1{font-size:44px}.form-grid{grid-template-columns:1fr}.container{width:94%}.footer{flex-wrap:wrap}.footer strong{width:100%;margin-left:47px}}