:root{color-scheme:light;--bg:#f6f8fc;--surface:#fff;--text:#1b2440;--sub:#72809a;--border:#e5eaf2;--primary:#6658df;--soft:#f4f2ff;--shadow:0 16px 42px rgba(27,36,64,.055)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Tahoma,"Segoe UI",Arial,sans-serif;line-height:1.75}
button,input,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}.shell{max-width:1230px;margin:auto;padding:20px 28px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:5px 0 20px;border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:12px}.brandmark{display:grid;place-items:center;width:47px;height:47px;border-radius:16px;background:linear-gradient(135deg,#776bf1,#4b42c6);color:#fff;font-size:25px;font-weight:900}.brandmark span{font-size:13px;color:#e4defe}.brand strong{font-family:Arial;font-size:19px;letter-spacing:-.5px}.brand em{color:var(--primary);font-style:normal}.brand small{display:block;color:var(--sub);font-size:11px;margin-top:-3px}
.top-actions{display:flex;align-items:center;gap:15px}.status-badge,.tag{font-size:11px;border:1px solid var(--border);border-radius:30px;padding:4px 10px;color:var(--sub);background:var(--surface)}.icon-btn{border:1px solid var(--border);background:var(--surface);color:var(--text);width:36px;height:36px;border-radius:11px}
.hero{text-align:center;max-width:800px;margin:39px auto 37px}.eyebrow{font-size:10px;letter-spacing:3px;font-family:Arial,sans-serif;font-weight:800;color:var(--primary)}h1{font-size:clamp(25px,3.5vw,39px);line-height:1.65;margin:10px 0}h1 span{color:var(--primary)}.hero p{color:var(--sub);font-size:14px;margin:0}
.layout{display:grid;grid-template-columns:minmax(320px, .9fr) minmax(380px,1.1fr);gap:22px;align-items:start}.panel{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:22px}.panel-heading>div{display:flex;align-items:center;gap:9px}.panel h2{margin:0;font-size:16px}.step{display:inline-flex;align-items:center;justify-content:center;background:var(--soft);color:var(--primary);font-size:11px;border-radius:8px;width:30px;height:30px}.muted{color:var(--sub);font-size:12px}
.field{margin-bottom:15px}.field label,.result-card label{font-weight:bold;font-size:11px;display:block;margin-bottom:7px}.field input,.result-card textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:9px 12px;color:var(--text);background:var(--surface);outline:none}.field input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--soft)}.field small{display:block;font-size:10px;color:var(--sub);margin-top:3px}
.recorder{background:linear-gradient(180deg,#fafaff,#f6f5fe);border:1px solid #edeafb;border-radius:16px;padding:15px;text-align:center}.record-state{font-size:12px;font-weight:600;color:var(--primary)}#wave{display:block;width:100%;max-width:100%;height:75px}.timer{font-family:Consolas,monospace;font-size:27px;font-weight:700;direction:ltr;margin:-5px 0 10px}.controls{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.primary-btn,.submit-btn{border:0;border-radius:10px;background:var(--primary);color:#fff;padding:10px 17px;font-weight:bold;font-size:12px}.secondary-btn{border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);padding:9px 13px;font-size:12px}
.separator{text-align:center;color:var(--sub);margin:13px 0;position:relative;font-size:11px}.separator:before{content:"";position:absolute;top:50%;right:0;left:0;border-top:1px solid var(--border)}.separator span{position:relative;background:var(--surface);padding:0 12px}
.upload{border:1.5px dashed #b9b2f4;border-radius:13px;display:flex;align-items:center;justify-content:center;gap:7px;flex-direction:column;min-height:103px;background:#fcfbff;cursor:pointer}.upload-icon{font-size:21px;color:var(--primary)}.upload strong{font-size:12px}.upload small{font-size:10px;color:var(--sub);direction:ltr}.file-label{font-size:11px;color:var(--primary);margin:7px 0;overflow-wrap:anywhere}.consent{display:flex;align-items:flex-start;gap:7px;font-size:11px;color:var(--sub);margin:17px 0}.consent input{accent-color:var(--primary);margin-top:6px}.submit-btn{width:100%;padding:13px;display:flex;align-items:center;justify-content:center;gap:12px}.notice{font-size:11px;min-height:1.4em;margin-top:10px;color:#ad4a4a}
.empty{text-align:center;color:var(--sub);padding:75px 25px 93px}.empty>span{display:grid;place-items:center;border-radius:20px;background:var(--soft);color:var(--primary);font-size:40px;width:90px;height:90px;margin:0 auto 18px}.empty h3{color:var(--text);font-size:17px;margin:0 0 5px}.empty p{font-size:12px;max-width:280px;margin:auto}.result-tabs{display:flex;gap:8px;border-bottom:1px solid var(--border);margin-bottom:14px}.tab{border:0;background:transparent;color:var(--sub);padding:9px 13px;font-size:12px}.tab.active{border-bottom:2px solid var(--primary);color:var(--primary);font-weight:bold}
.result-card{border:1px solid var(--border);border-radius:13px;padding:13px 15px;margin-bottom:12px;background:#fff}.result-card.green{background:#f1fcf8;border-color:#daf2e7}.result-card.blue{background:#f1f7ff;border-color:#e0ecfb}.result-label{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:bold;color:var(--sub)}.dot{width:7px;height:7px;border-radius:50%}.gray{background:#a4aec0}.mint{background:#21ae7a}.azure{background:#478be2}.purple{background:#8a6de8}.english{font-family:"Segoe UI",Arial,sans-serif;direction:ltr;text-align:left;font-size:16px;line-height:1.8;margin:7px 0;overflow-wrap:anywhere}.result-card textarea{resize:vertical;font:13px "Segoe UI",Arial;margin-bottom:5px}.text-btn{background:none;border:0;color:var(--primary);font-weight:bold;font-size:11px;padding:4px}
.teacher-feedback{background:var(--soft);padding:12px;border-radius:12px;font-size:12px;margin-bottom:12px}.error-card{border:1px solid var(--border);border-radius:12px;margin:9px 0;padding:12px}.error-card strong{font:13px "Segoe UI",Arial}.error-card p{font-size:12px}.priority{color:#985c2d;font-size:10px}.audio-row{display:flex;align-items:center;gap:10px;margin-top:15px}.audio-row audio{flex:1;max-width:100%;height:34px}.disclaimer{display:block;color:var(--sub);font-size:10px;margin-top:9px}.demo-banner{border:1px solid #efd89b;background:#fff9e8;border-radius:9px;font-size:11px;padding:9px;margin-bottom:13px}
.history{margin-top:22px}.history .panel-heading{margin-bottom:8px}.history-list{display:grid;gap:8px}.history-item{border-bottom:1px solid var(--border);padding:9px 0;display:flex;justify-content:space-between;align-items:center;gap:8px}.history-item button{border:0;background:none;color:var(--primary)}footer{text-align:center;color:var(--sub);direction:ltr;font:11px Arial;padding:25px}
body.dark{--bg:#121525;--surface:#1c2033;--text:#e8e9f8;--sub:#aab0cd;--border:#373b54;--soft:#302b51;--shadow:none;color-scheme:dark}body.dark .recorder,body.dark .upload,body.dark .result-card{background:#252a42;border-color:#383d57}body.dark .result-card.green{background:#183b35}body.dark .result-card.blue{background:#1b334a}body.dark .separator span{background:var(--surface)}
@media(max-width:850px){.layout{grid-template-columns:1fr}.shell{padding:12px}.hero{margin:25px auto}.panel{padding:17px}}@media(max-width:450px){.topbar{align-items:flex-start}.status-badge{font-size:9px}.hero h1{font-size:24px}.panel-heading{flex-wrap:wrap}.audio-row{flex-direction:column;align-items:stretch}}
.processing-link{display:inline-block;text-decoration:none;white-space:nowrap}
.processing-summary{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.processing-summary .tag{background:var(--soft);color:var(--text);font-size:12px}
.processing-item{border:1px solid var(--border);border-radius:12px;margin-top:9px;padding:0 14px}
.processing-item summary{cursor:pointer;padding:11px 0;font-size:13px}
.processing-item summary span,.processing-item summary time{margin-inline-start:10px}
.processing-item summary .tag{display:inline-block}
.processing-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));gap:8px 16px;margin:10px 0 14px}
.processing-fields dt{color:var(--sub);font-size:11px}
.processing-fields dd{margin:2px 0 0;font-size:12px;overflow-wrap:anywhere;unicode-bidi:plaintext;text-align:start}
.processing-run{border-top:1px solid var(--border);padding:8px 0}
.processing-run h4{margin:4px 0;font-size:13px}
.processing-stages{padding-inline-start:22px;margin:0}
.processing-stages li{border-top:1px solid var(--border);padding:8px 4px 0;font-size:12px}
.processing-error{display:inline-block;direction:ltr;color:#a74343;margin-bottom:8px}
body.dark .processing-error{color:#ffaaaa}
@media(max-width:520px){.top-actions{gap:6px;flex-wrap:wrap;justify-content:flex-end}.processing-fields{grid-template-columns:repeat(auto-fit,minmax(112px,1fr))}}