:root{color-scheme:dark;font-family:"Microsoft YaHei",system-ui,sans-serif;color:#dce4ee;background:#070e18}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 70% 0,#14253870,transparent 60%);min-height:100vh}aside{position:fixed;width:218px;inset:0 auto 0 0;background:#0b1421e8;border-right:1px solid #c7ad6330;padding:30px 23px}aside>a{color:#e1cd93;text-decoration:none;font-size:21px}aside p{font-size:12px;letter-spacing:4px;color:#8498b1;margin:15px 0 45px}nav{display:grid;gap:12px}button,a{touch-action:manipulation}button{border:1px solid #9c895947;border-radius:9px;padding:10px 16px;color:#d6c18c;background:#152335;cursor:pointer;font:inherit;font-size:14px}button:hover,button.active{border-color:#d7ba73;background:#223249}button:disabled{opacity:.45;cursor:wait}aside>span{display:block;margin-top:50px;color:#a4b2c7;font-size:12px}#logout{margin-top:15px}main{margin-left:218px;padding:40px 4vw;max-width:1600px}header{display:flex;justify-content:space-between}header small{color:#728ca8;font-size:10px;letter-spacing:4px}h1{font-size:30px;font-weight:400;color:#ecdeb9;margin:10px 0 22px}h2{font-weight:400;color:#e4cf96;font-size:21px}#status,[role=status]{color:#e1bb75;font-size:13px;min-height:20px}.toolbar{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:8px 0 22px}.panel{padding:23px;border:1px solid #a18b583b;border-radius:15px;background:#0d1928;margin-bottom:20px}input,select,textarea{padding:11px;border:1px solid #465a724d;background:#081321;color:#e1e7ee;border-radius:8px;font:inherit;max-width:100%}input:focus,textarea:focus{outline:1px solid #d0b16b}label{display:block;color:#9badc3;font-size:13px;margin:13px 0}label input,label select{display:block;width:100%;margin-top:7px}textarea{display:block;width:100%;min-height:430px;line-height:1.8;font-size:15px;resize:vertical}.editor{display:grid;grid-template-columns:280px 1fr;gap:22px}.note-list{max-height:72vh;overflow:auto;display:grid;align-content:start;gap:6px}.note-list button{text-align:left;color:#b6c7da;background:transparent;overflow-wrap:anywhere}.note-list small{display:block;color:#6d839e;margin-top:5px;font-size:10px}.table-wrap{overflow:auto;border:1px solid #647b902b;border-radius:12px}table{border-collapse:collapse;width:100%;font-size:13px;white-space:nowrap}th,td{text-align:left;padding:14px 13px;border-bottom:1px solid #7a90a21c}th{color:#cfba81;background:#142233;font-weight:400}td{color:#b4c4d6}td button{padding:6px 9px;font-size:12px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}dialog{width:min(600px,92vw);max-height:90vh;overflow:auto;background:#111d2d;border:1px solid #b9a068;border-radius:18px;color:#dce4ee;padding:28px}dialog::backdrop{background:#010711dc;backdrop-filter:blur(5px)}.hint{font-size:12px;color:#8297af;line-height:1.8}.danger{color:#e3a299}.code{font-family:monospace;letter-spacing:1px}.badge{color:#d8bb78}.empty{color:#879ab1;padding:30px}@media(max-width:900px){aside{position:static;width:auto;padding:16px}aside p,aside>span{display:none}nav{display:flex;gap:7px;flex-wrap:wrap;margin-top:18px}#logout{position:absolute;right:15px;top:0}main{margin:0;padding:20px}.editor{grid-template-columns:1fr}.note-list{max-height:230px}.grid{grid-template-columns:1fr}}
.note-list{display:block;padding:14px 8px;background:#0b1420}.explorer-heading{display:flex;align-items:center;gap:10px;padding:7px 10px 16px;color:#9aabc0;font-size:13px}.explorer-heading small{color:#647991}.explorer-heading button{margin-left:auto;padding:0 7px}.note-folder summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:7px;padding:9px 5px;color:#c3d0df;font-size:13px;border-radius:6px}.note-folder summary::-webkit-details-marker{display:none}.note-folder summary:before{content:'›';color:#7f92aa;width:10px}.note-folder[open]>summary:before{transform:rotate(90deg)}.note-folder summary small{margin-left:auto;font-size:10px;white-space:nowrap;color:#657c98}.folder-children{margin-left:12px;border-left:1px solid #50658026;padding-left:7px}.folder-icon{color:#bfa365}.note-list .note-file{display:flex;align-items:flex-start;gap:8px;width:100%;border:0;border-radius:6px;padding:8px 7px;font-size:13px;line-height:1.6;margin:2px 0}.note-file>span{color:#6e849d}.note-list .note-file:hover,.note-list .note-file.selected{background:#213248;color:#eed9a2}.note-folder summary:hover{background:#172638}input[type=checkbox]{accent-color:#d0b675;width:16px;height:16px;cursor:pointer}#daysFilter,#codeFilter{min-width:150px}.editor{grid-template-columns:minmax(280px,330px) minmax(0,1fr)}@media(max-width:900px){.editor{grid-template-columns:1fr}}

.teacher-record{padding:20px;border:1px solid #d4bb7540;border-radius:14px;margin:14px 0;background:#101c2b;overflow-wrap:anywhere}.teacher-record p,.teacher-record pre{white-space:pre-wrap}.teacher-record textarea{display:block;width:100%;min-height:100px;box-sizing:border-box;margin:12px 0}.teacher-record blockquote{border-left:2px solid #c6af78;padding-left:16px}.teacher-record pre{max-height:480px;overflow:auto}
.security-settings{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.security-filters label{min-width:140px}.security-action{max-width:calc(100vw - 24px)}.teacher-record pre{white-space:pre-wrap;overflow-wrap:anywhere}.security-settings label{display:grid;gap:8px}

/* Tablet/phone administration: compact navigation and independently scrollable data. */
@media(max-width:900px){
 aside{padding:14px 12px}aside nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-top:14px}
 aside nav button{min-height:44px;padding:8px 3px;font-size:12px}
 main{padding:18px 12px;min-width:0}h1{font-size:25px;overflow-wrap:anywhere}
 .panel,.teacher-record{padding:14px;min-width:0}.editor>*{min-width:0}
 .toolbar>*{min-width:0;max-width:100%}.toolbar input,.toolbar select{flex:1 1 140px}
 .security-filters label{min-width:0;flex:1 1 120px}.security-settings{grid-template-columns:minmax(0,1fr)}
 .note-folder summary{overflow-wrap:anywhere}.note-folder summary small{flex-shrink:0}
 .table-wrap{max-width:100%;overscroll-behavior-x:contain}
 dialog{padding:18px;max-height:calc(100dvh - 20px);width:calc(100vw - 24px)}
 input,select,textarea{font-size:16px;min-width:0}button{min-height:44px}
 textarea{min-height:220px}.teacher-record textarea{min-height:120px}
}

.planning-admin{max-width:1100px}.planning-admin h2{margin-top:0}.planning-target{display:grid;grid-template-columns:minmax(160px,1fr) minmax(220px,1.5fr) auto;gap:18px;align-items:end}.planning-target>button{margin-bottom:13px}.planning-template{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;align-items:end}.planning-template>button{margin-bottom:13px}.planning-custom{border-top:1px solid #a18b583b;padding-top:18px;margin-top:18px}.planning-custom summary{color:#b6c7da;cursor:pointer}.planning-custom input{max-width:480px}.planning-start{max-width:280px}.planning-row{display:grid;grid-template-columns:25px minmax(0,1fr) 130px auto;gap:16px;align-items:center;padding:18px;margin:16px 0;border:1px solid #647b9038;border-radius:14px;background:#101d2d}.planning-row label{margin:0}.planning-row input,.planning-row select{width:100%;min-width:0}.planning-number{color:#d9bf82;font-size:21px}.planning-days{display:flex;align-items:center;gap:10px}.planning-days input{width:95px}.planning-order{display:flex;gap:7px;padding-top:22px}.planning-order button{padding:9px 13px}.planning-row>small{grid-column:2/-1;color:#bea66d;font-size:13px}.planning-total{color:#e4cf96;font-size:17px;line-height:1.7}.planning-form [data-assign]{background:#dbc58b;color:#101d2d;font-weight:600;padding:13px 24px}.planning-form .hint{margin:20px 0 12px}.planning-admin [data-plan-status]{position:sticky;bottom:12px;background:#101d2df2;border-radius:8px;padding:10px}.planning-admin [data-plan-status]:empty{display:none}
@media(min-width:901px){
 aside{height:100vh;height:100dvh;overflow-y:scroll;overflow-x:hidden;overscroll-behavior-y:contain;scrollbar-gutter:stable;scrollbar-width:thin;scrollbar-color:#a99360 #101c2b}
 aside::-webkit-scrollbar{width:8px}
 aside::-webkit-scrollbar-track{background:#101c2b}
 aside::-webkit-scrollbar-thumb{background:#a99360;border:2px solid #101c2b;border-radius:8px}
 aside::-webkit-scrollbar-thumb:hover{background:#d7ba73}
 aside nav{gap:7px}aside p{margin-bottom:22px}
}
@media(max-width:680px){.planning-target{grid-template-columns:1fr;gap:0}.planning-target>button{justify-self:start}.planning-template{grid-template-columns:1fr;gap:0}.planning-template>button{justify-self:start}.planning-row{grid-template-columns:20px minmax(0,1fr);gap:12px;padding:14px}.planning-row>label{grid-column:2}.planning-row .planning-order{grid-column:2;padding-top:0;justify-content:flex-end}.planning-row>small{grid-column:2;line-height:1.7}.planning-days input{max-width:95px}.planning-row .planning-number{align-self:start;margin-top:4px}.planning-custom .toolbar{align-items:stretch;flex-direction:column}.planning-form [data-assign]{width:100%}}
/* Login methods */
.login-mode-tabs{display:flex;gap:8px;margin:0 0 16px}.login-mode-tabs button{flex:1;padding:10px 8px;min-height:42px;border:1px solid #526073;border-radius:10px;color:#bcc9d8;background:#101a29;font:inherit;cursor:pointer}.login-mode-tabs [aria-pressed=true]{color:#f1d17c;border-color:#b5984d;background:#24272b}.login-code-row{display:flex;align-items:stretch;gap:8px}.login-code-row input{flex:1;min-width:0}.login-code-row button{flex:none;max-width:45%;padding:8px 10px;border-radius:10px;border:1px solid #85724a;background:#192536;color:#f1d17c;cursor:pointer}.login-sms-fields label{display:block;margin-bottom:14px}.login-sms-fields input{box-sizing:border-box;width:100%}.login-sms-fields[hidden],#loginForm label[hidden],#login label[hidden]{display:none!important}#loginForm .login-mode-tabs button{letter-spacing:normal}#loginOverlay{overflow:auto}.login-card{margin-block:auto}

.qr-settings{max-width:680px}.qr-settings figure{margin:24px 0;color:#e1cc95}.qr-settings img{display:block;width:240px;height:240px;object-fit:contain;background:white;border:12px solid white;border-radius:8px;margin-bottom:16px}.qr-settings img[hidden]{display:none}.qr-settings input[type=file]{display:block;max-width:100%;margin-top:12px}.qr-settings #qrStatus{color:#e1cc95}

.code-folder-bar{padding:12px 14px;border:1px solid #a18b583b;border-radius:12px;background:#101d2d}.code-folder-bar label{display:flex;align-items:center;gap:10px;margin:0;white-space:nowrap}.code-folder-bar select{min-width:220px}.code-filters select{min-width:145px}.code-actions #moveFolder{min-width:180px}.code-management .hint{margin:10px 0 18px}.code-management .table-wrap{max-width:100%}
@media(max-width:600px){.code-folder-bar label{width:100%;justify-content:space-between}.code-folder-bar select{flex:1;min-width:0}.code-folder-bar button{flex:1 1 140px}.code-filters select,.code-actions #moveFolder{flex:1 1 140px;min-width:0}}

.teacher-record form label{display:grid;gap:8px;margin:12px 0}.teacher-record textarea{width:100%;min-height:80px;font-size:16px}.teacher-record pre{white-space:pre-wrap;overflow-wrap:anywhere}.teacher-record small{overflow-wrap:anywhere}.teacher-record button{min-height:42px}.toolbar{flex-wrap:wrap}.toolbar input,.toolbar select{max-width:100%}@media(max-width:600px){.teacher-record{padding:14px}.teacher-record form button{width:100%}}