:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:#202622;background:#fff;font-size:15px}
*{box-sizing:border-box}body{margin:0}main{max-width:580px;margin:auto;padding:24px 24px max(24px,env(safe-area-inset-bottom))}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px}h1,h2{font-size:18px;line-height:1.5;margin:0;font-weight:650}h1{font-weight:700}
p{font-size:15px;line-height:1.6;color:#657068;margin:8px 0 16px}.connection{display:flex;align-items:center;gap:7px;font-size:13px;color:#657068;white-space:nowrap}.light{height:6px;width:6px;border-radius:50%;background:#9b7466}.light.online{background:#2d7753}
section{border-top:1px solid #dce1db;padding-top:16px;margin-bottom:16px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
label{display:block;font-size:13px;margin:12px 0 6px}input{width:100%;height:48px;border:1px solid #bfc9bf;border-radius:7px;background:#fff;color:#202622;font:inherit;font-size:18px;padding:10px 12px;margin:0 0 12px}input::placeholder{font-size:15px;color:#657068}input:focus{outline:2px solid #497b5d;outline-offset:2px}
button{font:inherit;font-weight:600;width:100%;min-height:44px;border:0;border-radius:7px;background:#294d39;color:#fff;padding:11px 16px;cursor:pointer}button:hover{background:#203e2d}button:disabled{background:#d6ddd6;color:#657068;cursor:default}button:focus-visible,summary:focus-visible{outline:3px solid #8db99a;outline-offset:3px}
.secondary{background:transparent;color:#294d39;border:1px solid #b4c8b8}.secondary:hover{background:#edf2ea}.text-button{width:auto;min-height:44px;font-size:13px;font-weight:400;color:#657068;background:transparent;padding:8px 0 8px 12px}.text-button:hover{background:transparent;color:#202622}
.hint,.time{font-size:13px;color:#657068;line-height:1.6}.feedback{font-size:13px;padding:0;color:#795d46;margin:0 0 16px}.feedback.success{color:#294d39}
.activity,.history-item{border-top:1px solid #dce1db;padding:16px 0}.activity:first-child{border-top:0;padding-top:4px}.activity strong,dialog>strong{font-size:18px;line-height:1.5;display:block}.activity p{font-size:15px;margin:4px 0 12px}.activity button{margin-top:0}.tag{display:block;font-size:13px;color:#657068;margin-bottom:12px}
.history-line{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px}.history-note{font-size:13px}.confirm-button{margin-top:10px}.history-item button{font-size:13px}.empty{padding:12px 0 16px;margin-bottom:0;color:#657068}
summary{font-size:15px;font-weight:600;cursor:pointer;min-height:44px;line-height:44px}details>p{margin-top:8px}#school-status{font-size:13px;margin:4px 0 12px}#history-section{margin-top:8px}#history-section>summary{font-size:13px;font-weight:400}#install-guide p{margin-bottom:16px}#signed-history p{font-size:13px}#unpair-button{padding-left:0;font-size:13px}
footer{border-top:1px solid #dce1db;padding-top:16px;margin-top:16px;font-size:13px;line-height:1.6;color:#657068}
dialog{width:calc(100% - 32px);max-width:480px;max-height:90vh;overflow:auto;padding:22px;border:1px solid #c5cec4;border-radius:10px;background:#fff;color:#202622}dialog::backdrop{background:#0006}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.dialog-heading form{margin:0}#confirm-course{font-size:13px;margin:0 0 4px}#confirm-warning{font-size:13px;margin:12px 0}#sign-feedback{font-size:13px;margin-bottom:0}.code-hint{margin:-4px 0 16px}#pair-code{text-transform:uppercase;letter-spacing:4px}
[hidden]{display:none!important}@media(min-width:720px){main{padding-top:40px}}