:root{--bg:#f5f7f9;--card:#fff;--text:#333;--primary:#007bff;--border:#eee}.dark-mode{--bg:#121212;--card:#1e1e1e;--text:#ddd;--border:#333}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,sans-serif;overflow:hidden}.top-nav-wrapper{background:var(--card);border-bottom:1px solid var(--border);z-index:100;width:100%;height:60px;position:relative}.top-nav{justify-content:space-between;align-items:center;max-width:1000px;height:100%;margin:0 auto;padding:0 15px;display:flex;position:relative}.nav-section{align-items:center;display:flex}.nav-section.left{flex:1;gap:10px;min-width:0}.nav-section.center{pointer-events:none;position:absolute;left:50%;transform:translate(-50%)}.nav-section.right{flex:1;justify-content:flex-end}.logo{color:var(--primary);white-space:nowrap;font-size:16px;font-weight:700}.room-pill{background:var(--bg);cursor:pointer;border:1px solid var(--border);border-radius:20px;align-items:center;gap:6px;max-width:120px;padding:4px 10px;font-size:12px;display:flex}.room-name{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.dot{background:#ccc;border-radius:50%;width:7px;height:7px}.dot.online{background:#28a745;box-shadow:0 0 5px #28a74580}.expire-tag{color:#e65100;white-space:nowrap;background:#fff3e0;border:1px solid #ffe0b2;border-radius:20px;padding:4px 12px;font-size:12px}.dark-mode .expire-tag{color:#ffb74d;background:#332b1a;border-color:#4d3d26}.btn-icon{cursor:pointer;background:0 0;border:none;border-radius:8px;margin-left:5px;padding:8px;font-size:18px;transition:background .2s}.btn-icon:hover{background:var(--bg)}.content-area{flex-direction:column;max-width:1000px;height:calc(100vh - 60px);margin:0 auto;padding:15px;display:flex}.status-bar{color:#999;justify-content:space-between;align-items:center;height:20px;margin-bottom:8px;font-size:12px;display:flex}.status-left{align-items:center;gap:10px;display:flex}.status-msg.status-success{color:#28a745}.status-msg.status-error{color:#dc3545}.hint{opacity:.5}.editor-box{background:var(--card);border:1px solid var(--border);border-radius:12px;flex:1;overflow:hidden;box-shadow:0 4px 12px #0000000d}textarea{resize:none;width:100%;height:100%;color:inherit;background:0 0;border:none;outline:none;padding:20px;font-family:inherit;font-size:16px;line-height:1.6}.mask{z-index:200;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#0006;position:fixed;inset:0}.side-drawer{background:var(--card);z-index:300;width:300px;padding:20px;transition:transform .3s cubic-bezier(.4,0,.2,1);position:fixed;top:0;bottom:0;right:0;transform:translate(100%)}.side-drawer.show{transform:translate(0)}.drawer-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:10px;display:flex}.drawer-head button{color:#999;cursor:pointer;background:0 0;border:none;font-size:20px}.field{margin-bottom:25px}.field label{opacity:.8;margin-bottom:8px;font-size:13px;font-weight:700;display:block}.input-btn-group{border:1px solid var(--border);border-radius:8px;display:flex;overflow:hidden}.input-btn-group input{color:inherit;background:0 0;border:none;outline:none;flex:1;padding:10px}.input-btn-group button{background:var(--primary);color:#fff;cursor:pointer;border:none;padding:0 15px}.opt-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.opt-grid button{border:1px solid var(--border);background:var(--bg);cursor:pointer;color:inherit;border-radius:6px;padding:8px;font-size:12px}.opt-grid button.active{background:var(--primary);color:#fff;border-color:var(--primary)}.primary-btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:12px;font-weight:700}.modal{z-index:1000;background:#0009;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-body{background:var(--card);text-align:center;border-radius:20px;padding:25px}.qr-wrap{background:#fff;border-radius:10px;margin-bottom:15px;padding:10px;display:inline-block}.modal-body button{border:1px solid var(--border);cursor:pointer;background:var(--bg);width:100%;color:inherit;border-radius:8px;margin-top:15px;padding:10px}.history-item{border:1px solid var(--border);cursor:pointer;border-radius:8px;margin-bottom:10px;padding:12px;font-size:14px}.history-item:hover{background:var(--bg)}@media (width<=600px){.logo,.hint{display:none}.nav-section.center{flex:1;justify-content:center;position:static;left:auto;transform:none}.side-drawer{width:85%}.status-right{font-size:10px}}