:root{
  --se-primary:#124e78;
  --se-accent:#00a896;
  --se-warm:#ffb703;
  --se-coral:#ff6b6b;
  --se-ink:#152f43;
  --se-muted:#667c8c;
  --se-bg:#f2f7f9;
  --se-card:#ffffff;
  --se-line:#dce8ec;
  --se-shadow:0 18px 55px rgba(19,54,76,.10);
  --se-radius:22px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--se-bg);color:var(--se-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.55}
button,input,select,textarea{font:inherit}
button,a{touch-action:manipulation}
a{color:var(--se-primary);text-decoration:none}
img,video{max-width:100%}
[hidden]{display:none!important}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}

.container{width:min(1180px,calc(100% - 36px));margin-inline:auto}
.narrow{width:min(760px,calc(100% - 36px));margin-inline:auto}
.stack{display:flex;flex-direction:column;gap:18px}
.row{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.between{justify-content:space-between}
.muted{color:var(--se-muted)}
.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:.78rem;font-weight:800;color:var(--se-accent)}
.metric{font-variant-numeric:tabular-nums}

.brand-mark{width:54px;height:54px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(145deg,var(--se-accent),var(--se-primary));color:#fff;box-shadow:0 12px 28px rgba(0,168,150,.24);overflow:hidden;flex:0 0 auto}
.brand-mark span{font-size:1.55rem;font-weight:900}
.brand-mark img{width:100%;height:100%;object-fit:contain;background:#fff}
.brand-mark-small{width:42px;height:42px;border-radius:14px}
.brand-mark-small span{font-size:1.2rem}

.public-nav{position:sticky;top:0;z-index:30;background:rgba(248,252,253,.9);backdrop-filter:blur(18px);border-bottom:1px solid rgba(220,232,236,.9)}
.public-nav-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.public-brand{display:flex;align-items:center;gap:12px;color:var(--se-ink)}
.public-brand strong{display:block;font-size:1.04rem;line-height:1.15}
.public-brand small{display:block;color:var(--se-muted);font-size:.76rem;margin-top:3px}
.public-links{display:flex;align-items:center;gap:24px}
.public-links a{color:#365365;font-weight:700;font-size:.93rem}
.public-links a:hover{color:var(--se-accent)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;border:1px solid transparent;border-radius:14px;padding:11px 18px;font-weight:800;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--se-primary);color:#fff;box-shadow:0 12px 26px rgba(18,78,120,.18)}
.btn-primary:hover{background:#0d4166;color:#fff}
.btn-accent{background:var(--se-accent);color:#fff;box-shadow:0 12px 26px rgba(0,168,150,.18)}
.btn-accent:hover{background:#008f80;color:#fff}
.btn-warm{background:var(--se-warm);color:#2f310b}
.btn-light{background:#fff;border-color:var(--se-line);color:var(--se-ink)}
.btn-danger{background:#fff0ef;color:#a93631;border-color:#ffd4d1}
.btn-small{min-height:38px;padding:8px 13px;border-radius:11px;font-size:.86rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.52;cursor:not-allowed;transform:none}

.hero{position:relative;overflow:hidden;padding:74px 0 82px;background:linear-gradient(150deg,#effafa 0%,#f8fbff 52%,#fff9e8 100%)}
.hero:before{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(0,168,150,.15),rgba(0,168,150,0) 66%);right:-100px;top:-210px}
.hero:after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(255,183,3,.20),rgba(255,183,3,0) 68%);left:-80px;bottom:-170px}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.hero h1{font-size:clamp(2.6rem,6vw,5.4rem);line-height:.98;letter-spacing:-.055em;margin:14px 0 22px;max-width:800px}
.hero h1 em{font-style:normal;color:var(--se-accent)}
.hero-copy>p{font-size:1.12rem;color:#4a6678;max-width:640px;margin:0 0 28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.trust-row{display:flex;gap:20px;margin-top:32px;flex-wrap:wrap;color:#506b7b;font-size:.9rem;font-weight:700}
.trust-row span:before{content:"✓";display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:#dff7f2;color:#087a6e;margin-right:7px}

.product-window{background:#fff;border:1px solid rgba(211,228,233,.9);border-radius:28px;box-shadow:0 28px 80px rgba(20,62,85,.16);padding:18px;transform:rotate(1.2deg)}
.window-top{display:flex;align-items:center;justify-content:space-between;padding:2px 3px 15px}
.window-dots{display:flex;gap:6px}.window-dots i{width:9px;height:9px;border-radius:50%;background:#d9e5e8}.window-dots i:first-child{background:#ff8078}.window-dots i:nth-child(2){background:#ffc74d}.window-dots i:last-child{background:#37c9a5}
.day-card{border-radius:22px;background:linear-gradient(135deg,var(--se-primary),#1b6a8f);color:#fff;padding:22px}
.day-card small{opacity:.74}.day-card h3{font-size:1.55rem;margin:5px 0 18px}
.day-progress{height:8px;border-radius:10px;background:rgba(255,255,255,.2);overflow:hidden}.day-progress span{display:block;width:62%;height:100%;background:var(--se-warm);border-radius:inherit}
.skill-preview{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px}
.skill-mini{padding:14px;border:1px solid var(--se-line);border-radius:16px;background:#fbfdfe;display:flex;gap:10px;align-items:center}
.skill-mini b{display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:#e4f8f5;color:#087b70}.skill-mini div{font-size:.85rem}.skill-mini strong{display:block;font-size:.92rem}.skill-mini small{color:var(--se-muted)}

.section{padding:78px 0}
.section-white{background:#fff}
.section-head{text-align:center;max-width:700px;margin:0 auto 38px}
.section-head h2{font-size:clamp(2rem,4vw,3.25rem);line-height:1.08;letter-spacing:-.035em;margin:9px 0 14px}
.section-head p{color:var(--se-muted);margin:0;font-size:1.03rem}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feature-card{background:#fff;border:1px solid var(--se-line);border-radius:22px;padding:24px;box-shadow:0 12px 36px rgba(29,70,91,.05)}
.feature-icon{width:50px;height:50px;display:grid;place-items:center;border-radius:16px;background:#e7f8f5;color:var(--se-accent);font-size:1.35rem;margin-bottom:18px}
.feature-card:nth-child(2) .feature-icon{background:#eef1ff;color:#5a63c9}.feature-card:nth-child(3) .feature-icon{background:#fff3e2;color:#c66f11}.feature-card:nth-child(4) .feature-icon{background:#fff0ef;color:#d65550}
.feature-card h3{margin:0 0 7px}.feature-card p{margin:0;color:var(--se-muted);font-size:.93rem}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.course-card{background:#fff;border:1px solid var(--se-line);border-radius:24px;overflow:hidden;box-shadow:0 12px 36px rgba(29,70,91,.06)}
.course-cover{height:170px;background:linear-gradient(145deg,#124e78,#00a896);position:relative;padding:22px;color:#fff;display:flex;align-items:flex-end}
.course-cover:after{content:"";position:absolute;width:130px;height:130px;border:22px solid rgba(255,255,255,.11);border-radius:50%;right:-20px;top:-26px}
.course-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.course-cover span{position:relative;z-index:1;background:rgba(5,41,60,.58);backdrop-filter:blur(8px);padding:7px 11px;border-radius:999px;font-size:.8rem;font-weight:800}
.course-body{padding:22px}.course-body h3{margin:0 0 8px;font-size:1.2rem}.course-body p{color:var(--se-muted);font-size:.92rem;min-height:44px}.course-meta{display:flex;justify-content:space-between;gap:10px;align-items:center;border-top:1px solid var(--se-line);padding-top:16px;margin-top:16px}
.cta-panel{background:linear-gradient(130deg,#123f62,#0a7e74);border-radius:30px;padding:42px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-panel h2{margin:0 0 8px;font-size:2rem}.cta-panel p{margin:0;opacity:.78}
.public-footer{background:#102e42;color:#d9e7ed;padding:42px 0}.public-footer-grid{display:flex;justify-content:space-between;gap:30px;align-items:center}.public-footer a{color:#fff}.public-footer small{opacity:.7}

.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#fff}
.auth-art{padding:60px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(145deg,#123f62,#0a7e74);color:#fff;position:relative;overflow:hidden}
.auth-art:after{content:"";position:absolute;width:430px;height:430px;border:80px solid rgba(255,255,255,.07);border-radius:50%;right:-150px;bottom:-160px}
.auth-quote{position:relative;z-index:1;max-width:560px}.auth-quote h1{font-size:clamp(2.5rem,5vw,4.6rem);line-height:1.03;letter-spacing:-.05em;margin:15px 0}.auth-quote p{font-size:1.05rem;opacity:.78}.auth-form-wrap{padding:48px 7vw;display:flex;align-items:center;justify-content:center;background:#f7fbfc}.auth-form{width:min(470px,100%)}
.auth-form h2{font-size:2rem;line-height:1.15;margin:0 0 8px}.auth-form>p{color:var(--se-muted);margin:0 0 24px}

.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-full{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:7px}.field label{font-weight:800;font-size:.88rem;color:#365264}.field input,.field select,.field textarea{width:100%;border:1px solid #cddde3;background:#fff;color:var(--se-ink);border-radius:13px;padding:11px 13px;outline:none;min-height:46px}.field textarea{min-height:120px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--se-accent);box-shadow:0 0 0 4px rgba(0,168,150,.1)}.field small{color:var(--se-muted)}
.checkbox{display:flex;gap:9px;align-items:flex-start;font-size:.9rem}.checkbox input{margin-top:4px}
.alert{padding:13px 15px;border-radius:13px;margin:13px 0;font-weight:650}.alert-success{background:#e8f8f2;color:#0a6d52;border:1px solid #bfebdc}.alert-danger{background:#fff0ef;color:#a2332f;border:1px solid #ffd2cf}.alert-warning{background:#fff8df;color:#775b00;border:1px solid #f7e6a9}.alert-info{background:#eaf5fb;color:#1c5a78;border:1px solid #cce6f3}

.app-top{position:sticky;top:0;z-index:40;min-height:72px;padding:10px clamp(16px,3vw,42px);display:grid;grid-template-columns:minmax(210px,1fr) auto minmax(210px,1fr);align-items:center;gap:20px;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid var(--se-line)}
.app-brand{display:flex;gap:11px;align-items:center;color:var(--se-ink)}.app-brand strong,.app-brand small{display:block}.app-brand strong{line-height:1.1}.app-brand small{color:var(--se-muted);font-size:.75rem;margin-top:3px}
.app-nav{display:flex;align-items:center;gap:5px;background:#f0f6f8;padding:5px;border-radius:15px}.app-nav a{padding:9px 13px;border-radius:11px;color:#4c6778;font-weight:750;font-size:.88rem}.app-nav a.active{background:#fff;color:var(--se-primary);box-shadow:0 4px 12px rgba(20,55,75,.08)}
.user-chip{justify-self:end;display:flex;align-items:center;gap:10px}.user-chip>span{width:38px;height:38px;border-radius:13px;background:var(--se-primary);color:#fff;display:grid;place-items:center;font-weight:900}.user-chip strong,.user-chip a{display:block;font-size:.8rem}.user-chip a{color:var(--se-muted)}
.nav-toggle{display:none;border:0;background:#eef5f7;border-radius:10px;width:40px;height:40px;color:var(--se-ink);font-size:1.25rem}

.app-main{width:min(1220px,calc(100% - 36px));margin:0 auto;padding:34px 0 80px}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:25px}.page-head h1{font-size:clamp(1.8rem,4vw,2.75rem);line-height:1.08;letter-spacing:-.035em;margin:5px 0}.page-head p{margin:0;color:var(--se-muted)}
.card{background:var(--se-card);border:1px solid var(--se-line);border-radius:var(--se-radius);box-shadow:0 10px 36px rgba(25,61,81,.055)}
.card-pad{padding:22px}.card-title{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:17px}.card-title h2,.card-title h3{margin:0}.card-title h2{font-size:1.25rem}.card-title h3{font-size:1rem}.card-title a{font-weight:800;font-size:.88rem}
.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.7fr);gap:22px}.today-panel{background:linear-gradient(140deg,#123f62,#0a776f);color:#fff;border:0;position:relative;overflow:hidden}.today-panel:after{content:"";position:absolute;width:260px;height:260px;border:54px solid rgba(255,255,255,.07);border-radius:50%;right:-80px;top:-100px}.today-content{position:relative;z-index:1;padding:28px}.today-content h2{font-size:2rem;margin:5px 0}.today-content p{opacity:.75;margin:0 0 24px}.progress-line{display:flex;gap:14px;align-items:center}.progress-track{flex:1;height:10px;background:rgba(255,255,255,.18);border-radius:12px;overflow:hidden}.progress-track span{display:block;height:100%;border-radius:inherit;background:var(--se-warm)}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}.stat-box{background:rgba(255,255,255,.11);border:1px solid rgba(255,255,255,.13);border-radius:16px;padding:15px}.stat-box strong{display:block;font-size:1.25rem}.stat-box small{opacity:.72}
.side-stats{display:grid;gap:14px}.mini-stat{padding:19px;display:flex;align-items:center;gap:14px}.mini-stat i{font-style:normal;width:45px;height:45px;border-radius:15px;background:#e4f8f4;display:grid;place-items:center;font-size:1.2rem}.mini-stat strong,.mini-stat small{display:block}.mini-stat strong{font-size:1.15rem}.mini-stat small{color:var(--se-muted)}

.skills-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.skill-card{position:relative;display:flex;flex-direction:column;gap:14px;padding:20px;background:#fff;border:1px solid var(--se-line);border-radius:20px;color:var(--se-ink);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.skill-card:hover{transform:translateY(-3px);box-shadow:var(--se-shadow);border-color:#bcdbe2}.skill-card.locked{opacity:.58;filter:grayscale(.25)}.skill-card-icon{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:#e4f8f5;color:#087a6e;font-size:1.35rem}.skill-card:nth-child(4n+2) .skill-card-icon{background:#eef0ff;color:#5c63c9}.skill-card:nth-child(4n+3) .skill-card-icon{background:#fff4df;color:#b8680c}.skill-card:nth-child(4n+4) .skill-card-icon{background:#fff0ef;color:#c54843}.skill-card h3{margin:0;font-size:1.04rem}.skill-card p{margin:0;color:var(--se-muted);font-size:.86rem;flex:1}.skill-state{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;font-weight:800}.status-dot{display:inline-flex;gap:6px;align-items:center}.status-dot:before{content:"";width:8px;height:8px;border-radius:50%;background:#a8bbc3}.status-dot.completed:before{background:#19a974}.status-dot.started:before{background:#f0a113}.skill-arrow{font-size:1.1rem;color:var(--se-accent)}

.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.list{display:flex;flex-direction:column}.list-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 0;border-bottom:1px solid var(--se-line)}.list-item:last-child{border-bottom:0}.list-item-main{display:flex;align-items:center;gap:12px;min-width:0}.list-item-main i{font-style:normal;width:40px;height:40px;display:grid;place-items:center;background:#eef6f8;border-radius:13px}.list-item-main strong,.list-item-main small{display:block}.list-item-main small{color:var(--se-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:520px}
.pill{display:inline-flex;align-items:center;border-radius:999px;padding:5px 10px;font-size:.75rem;font-weight:800;background:#edf4f6;color:#506b79}.pill-green{background:#e3f7ef;color:#087354}.pill-yellow{background:#fff3cf;color:#795800}.pill-red{background:#ffebe9;color:#a03430}.pill-blue{background:#e8f2fb;color:#1b5f8e}

.table-wrap{overflow:auto;border:1px solid var(--se-line);border-radius:16px}.table{width:100%;border-collapse:collapse;min-width:680px}.table th,.table td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--se-line);vertical-align:top}.table th{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:#617888;background:#f7fafb}.table td{font-size:.9rem}.table tr:last-child td{border-bottom:0}.table-actions{display:flex;gap:6px;flex-wrap:wrap}
.tabs{display:flex;gap:7px;overflow:auto;border-bottom:1px solid var(--se-line);margin-bottom:20px;padding-bottom:8px}.tabs a{white-space:nowrap;padding:9px 13px;border-radius:10px;color:var(--se-muted);font-weight:800;font-size:.86rem}.tabs a.active{background:var(--se-primary);color:#fff}

.activity-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:22px;align-items:start}.activity-card{padding:clamp(20px,4vw,38px)}.activity-card h1{font-size:clamp(1.65rem,4vw,2.6rem);line-height:1.12;margin:8px 0 11px}.activity-instructions{color:var(--se-muted);font-size:1rem;margin-bottom:25px}.content-box{border:1px solid var(--se-line);border-radius:18px;padding:20px;background:#fbfdfe;margin:18px 0}.content-box p:first-child{margin-top:0}.content-box p:last-child{margin-bottom:0}.prompt-box{background:linear-gradient(135deg,#e9f8f5,#eef5fb);border:1px solid #cce6e3;border-radius:18px;padding:20px;margin:18px 0}.prompt-box strong{display:block;color:var(--se-accent);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}.prompt-box p{font-size:1.15rem;font-weight:750;margin:0}.help-box{padding:14px 16px;border-left:4px solid var(--se-warm);background:#fff9e9;border-radius:0 12px 12px 0;color:#5f5427;margin:16px 0}
.media-frame{aspect-ratio:16/9;background:#0d2837;border-radius:18px;overflow:hidden}.media-frame iframe,.media-frame video{width:100%;height:100%;border:0}.audio-player{width:100%;margin:12px 0}.tts-controls{display:flex;gap:9px;flex-wrap:wrap;margin:12px 0}
.timer{display:flex;align-items:center;justify-content:center;width:104px;height:104px;border-radius:50%;background:#fff;border:8px solid #dbecef;color:var(--se-primary);font-size:1.55rem;font-weight:900;margin:18px auto;box-shadow:0 12px 30px rgba(21,62,83,.1)}
.recorder{border:1px solid var(--se-line);border-radius:20px;background:#f7fbfc;padding:22px;text-align:center}.record-button{width:78px;height:78px;border-radius:50%;border:8px solid #ffd9d6;background:var(--se-coral);color:#fff;font-size:1.55rem;cursor:pointer;box-shadow:0 12px 30px rgba(255,107,107,.23)}.record-button.recording{animation:pulse 1.25s infinite;background:#d63f3f}.waveform{display:flex;height:42px;align-items:center;justify-content:center;gap:3px;margin:14px 0}.waveform i{display:block;width:4px;border-radius:5px;background:var(--se-accent);height:8px}.waveform.active i:nth-child(3n){animation:wave .65s ease-in-out infinite alternate}.waveform.active i:nth-child(3n+1){animation:wave .8s .1s ease-in-out infinite alternate}.waveform.active i:nth-child(3n+2){animation:wave .7s .2s ease-in-out infinite alternate}
@keyframes pulse{50%{box-shadow:0 0 0 18px rgba(214,63,63,.12)}}@keyframes wave{to{height:36px}}
.record-status{font-weight:800}.record-actions{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin-top:15px}.upload-progress{height:8px;background:#deeaee;border-radius:10px;overflow:hidden;margin:12px 0}.upload-progress span{height:100%;display:block;width:0;background:var(--se-accent);transition:width .2s ease}
.question{padding:18px 0;border-bottom:1px solid var(--se-line)}.question:last-child{border-bottom:0}.question>strong{display:block;margin-bottom:11px}.option{display:flex;gap:9px;align-items:flex-start;padding:10px 12px;border:1px solid var(--se-line);border-radius:12px;margin:7px 0;background:#fff}.option:hover{border-color:#9ccfd0}.option input{margin-top:4px}
.activity-side{position:sticky;top:94px}.day-outline a{display:flex;gap:10px;padding:11px 0;border-bottom:1px solid var(--se-line);color:var(--se-ink);font-size:.86rem}.day-outline a:last-child{border:0}.day-outline a.active{font-weight:900;color:var(--se-accent)}

.score-ring{--value:0;width:112px;height:112px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--se-accent) calc(var(--value)*1%),#e5eef1 0);position:relative}.score-ring:after{content:"";position:absolute;inset:10px;border-radius:50%;background:#fff}.score-ring strong{position:relative;z-index:1;font-size:1.35rem}.chart-bars{display:flex;gap:12px;align-items:flex-end;height:180px;border-bottom:1px solid var(--se-line);padding:0 8px}.chart-bar{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:7px;height:100%}.chart-bar i{display:block;width:min(36px,80%);height:calc(var(--value)*1%);min-height:3px;border-radius:8px 8px 2px 2px;background:linear-gradient(180deg,var(--se-accent),var(--se-primary))}.chart-bar small{font-size:.7rem;color:var(--se-muted)}

.ai-shell{display:grid;grid-template-columns:290px minmax(0,1fr);gap:20px;height:calc(100vh - 150px);min-height:550px}.ai-sidebar,.ai-chat{background:#fff;border:1px solid var(--se-line);border-radius:22px;overflow:hidden}.ai-sidebar{padding:20px}.ai-sidebar h2{margin:0 0 15px;font-size:1.1rem}.scenario{display:block;width:100%;text-align:left;border:1px solid var(--se-line);background:#fff;border-radius:13px;padding:12px;margin-bottom:8px;cursor:pointer;color:var(--se-ink)}.scenario.active{border-color:var(--se-accent);background:#eaf9f6}.ai-chat{display:flex;flex-direction:column}.ai-chat-head{padding:17px 20px;border-bottom:1px solid var(--se-line);display:flex;justify-content:space-between;align-items:center}.ai-messages{flex:1;overflow:auto;padding:22px;display:flex;flex-direction:column;gap:14px}.message{max-width:min(78%,650px);padding:12px 15px;border-radius:17px;background:#eff5f7;align-self:flex-start}.message.student{background:var(--se-primary);color:#fff;align-self:flex-end}.message small{display:block;margin-top:5px;opacity:.7}.correction{margin-top:8px;padding-top:8px;border-top:1px solid rgba(0,0,0,.08);font-size:.86rem;color:#745c00}.ai-compose{border-top:1px solid var(--se-line);padding:14px;display:flex;align-items:center;gap:9px}.ai-compose input{flex:1;border:1px solid var(--se-line);border-radius:13px;padding:11px 13px;min-width:0}.mic-button{width:46px;height:46px;border:0;border-radius:14px;background:#ffe8e5;color:#c5413c;cursor:pointer;font-size:1.15rem}.mic-button.listening{animation:pulse 1.25s infinite;background:#f25e58;color:#fff}

.manage-layout{display:grid;grid-template-columns:245px minmax(0,1fr);gap:22px}.manage-side{position:sticky;top:92px;align-self:start;padding:14px}.manage-side a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:11px;color:#4e6878;font-weight:750;font-size:.88rem}.manage-side a:hover,.manage-side a.active{background:#eaf6f4;color:#08786e}.manage-content{min-width:0}.builder-tree{display:flex;flex-direction:column;gap:9px}.tree-row{display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--se-line);border-radius:13px;padding:11px 13px;background:#fff}.tree-row.level-1{margin-left:20px}.tree-row.level-2{margin-left:40px}.tree-row.level-3{margin-left:60px}.tree-row.level-4{margin-left:80px}.tree-label{display:flex;align-items:center;gap:9px;min-width:0}.tree-label strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.modal{position:fixed;inset:0;background:rgba(8,31,45,.56);display:none;align-items:center;justify-content:center;padding:18px;z-index:100}.modal.open{display:flex}.modal-card{width:min(680px,100%);max-height:90vh;overflow:auto;background:#fff;border-radius:22px;padding:24px;box-shadow:0 28px 90px rgba(0,0,0,.25)}.modal-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:18px}.modal-head h2{margin:0}.modal-close{border:0;background:#eef4f6;width:38px;height:38px;border-radius:11px;cursor:pointer}
.empty{text-align:center;padding:46px 22px}.empty-icon{width:64px;height:64px;border-radius:20px;background:#e8f7f4;display:grid;place-items:center;margin:0 auto 16px;font-size:1.6rem}.empty h3{margin:0 0 7px}.empty p{color:var(--se-muted);margin:0 auto 18px;max-width:460px}
.pagination{display:flex;gap:6px;justify-content:flex-end;margin-top:16px}.pagination a,.pagination span{min-width:38px;height:38px;border-radius:10px;display:grid;place-items:center;border:1px solid var(--se-line);background:#fff}.pagination .active{background:var(--se-primary);color:#fff;border-color:var(--se-primary)}
.toast{position:fixed;right:22px;bottom:22px;z-index:120;background:#102f43;color:#fff;border-radius:14px;padding:13px 16px;box-shadow:0 14px 40px rgba(0,0,0,.22);transform:translateY(25px);opacity:0;pointer-events:none;transition:.2s}.toast.show{transform:none;opacity:1}.toast.error{background:#a63632}

@media(max-width:1040px){
  .hero-grid{gap:34px}.feature-grid{grid-template-columns:repeat(2,1fr)}.skills-grid{grid-template-columns:repeat(3,1fr)}
  .app-top{grid-template-columns:1fr auto auto}.app-nav{position:fixed;top:72px;left:14px;right:14px;display:none;flex-direction:column;align-items:stretch;padding:9px;box-shadow:var(--se-shadow);border:1px solid var(--se-line)}.app-nav.open{display:flex}.nav-toggle{display:block}.app-nav a{text-align:center}.user-chip div{display:none}
  .manage-layout{grid-template-columns:1fr}.manage-side{position:static;display:flex;overflow:auto}.manage-side a{white-space:nowrap}.activity-layout{grid-template-columns:1fr}.activity-side{position:static}.ai-shell{grid-template-columns:220px minmax(0,1fr)}
}

@media(max-width:780px){
  .container,.narrow,.app-main{width:min(100% - 26px,1180px)}.public-links a:not(.btn){display:none}.hero{padding:50px 0}.hero-grid{grid-template-columns:1fr}.hero-copy{text-align:center}.hero-copy>p{margin-inline:auto}.hero-actions,.trust-row{justify-content:center}.product-window{transform:none;max-width:560px;margin:auto}.course-grid,.three-col{grid-template-columns:1fr}.cta-panel{padding:30px;display:block;text-align:center}.cta-panel .btn{margin-top:20px}.public-footer-grid{display:block;text-align:center}.public-footer-grid>div{margin-bottom:12px}
  .auth-page{grid-template-columns:1fr}.auth-art{display:none}.auth-form-wrap{padding:32px 18px;min-height:100vh}.dashboard-grid,.two-col{grid-template-columns:1fr}.skills-grid{grid-template-columns:repeat(2,1fr)}.app-main{padding-top:22px}.page-head{align-items:flex-start;flex-direction:column}.stat-grid{grid-template-columns:repeat(3,1fr)}
  .form-grid{grid-template-columns:1fr}.form-full{grid-column:auto}.ai-shell{display:flex;flex-direction:column;height:auto}.ai-sidebar{display:flex;overflow:auto;gap:8px}.ai-sidebar h2{display:none}.scenario{min-width:160px;margin:0}.ai-chat{height:68vh;min-height:520px}.tree-row.level-3,.tree-row.level-4{margin-left:30px}
}

@media(max-width:520px){
  body{font-size:15px}.public-nav-inner{height:66px}.public-brand small{display:none}.brand-mark-small{width:38px;height:38px}.hero h1{font-size:2.75rem}.skill-preview{grid-template-columns:1fr}.feature-grid,.skills-grid{grid-template-columns:1fr}.hero-actions .btn{width:100%}.trust-row{display:grid;gap:9px;text-align:left}.section{padding:56px 0}.cta-panel{border-radius:22px}.app-top{min-height:64px;padding:8px 13px;grid-template-columns:1fr auto auto}.app-top .app-brand small{display:none}.user-chip>span{width:36px;height:36px}.app-nav{top:64px}.today-content{padding:22px}.today-content h2{font-size:1.55rem}.stat-grid{grid-template-columns:1fr}.stat-box{display:flex;justify-content:space-between;align-items:center}.card-pad{padding:18px}.activity-card{padding:20px}.activity-layout{gap:14px}.message{max-width:88%}.ai-compose{flex-wrap:wrap}.ai-compose input{order:-1;flex-basis:100%}.tree-row.level-1,.tree-row.level-2,.tree-row.level-3,.tree-row.level-4{margin-left:0}.tree-row{align-items:flex-start}.table-actions{min-width:160px}.recorder{padding:18px}.timer{width:90px;height:90px}.app-main{padding-bottom:90px}
}

@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}