:root{color:#18212f;font-synthesis:none;text-rendering:optimizelegibility;background:#f5f7fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input,textarea{font:inherit}button{cursor:pointer;border:0}button:disabled{cursor:not-allowed;opacity:.55}.shell{width:min(1120px,100vw - 32px);margin:0 auto;padding:20px 0 40px}.topbar{justify-content:space-between;align-items:center;gap:12px;padding:10px 0 24px;display:flex}.brand,.nav button,.primary,.secondary,.danger,.copy-link{white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:8px;min-height:40px;text-decoration:none;display:inline-flex}.brand{color:#101828;background:0 0;font-size:20px;font-weight:800}.nav{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.nav button,.secondary,.copy-link{color:#223046;background:#e8edf5;padding:0 14px}.primary{color:#fff;background:#0f766e;padding:0 16px}.danger{color:#fff;background:#b42318;padding:0 14px}.secondary.active{color:#7a4b00;background:#fff2cc}.home-grid,.receiver-layout,.sender-layout,.admin-layout{grid-template-columns:minmax(0,1.5fr) minmax(280px,.85fr);align-items:start;gap:16px;display:grid}.hero-panel,.panel,.session-card{background:#fff;border:1px solid #d8dee8;border-radius:8px;box-shadow:0 14px 40px #18212f14}.hero-panel{flex-direction:column;justify-content:center;min-height:420px;padding:clamp(24px,5vw,48px);display:flex}.hero-panel h1{letter-spacing:0;max-width:780px;margin:12px 0;font-size:clamp(34px,5vw,64px);line-height:1.04}.hero-panel p{color:#526174;max-width:620px;margin:0 0 24px;font-size:18px;line-height:1.7}.eyebrow,.section-title{color:#0f766e;align-items:center;gap:8px;font-weight:800;display:flex}.panel{padding:18px}.config-panel{gap:14px;display:grid}.section-title{flex-wrap:wrap;justify-content:flex-start;margin-bottom:16px}label{color:#344054;gap:7px;font-size:14px;font-weight:700;display:grid}input,textarea{color:#101828;background:#fff;border:1px solid #cfd7e5;border-radius:8px;outline:none;width:100%}input{min-height:42px;padding:0 12px}textarea{resize:vertical;min-height:260px;padding:14px;line-height:1.7}input:focus,textarea:focus{border-color:#0f766e;box-shadow:0 0 0 3px #0f766e24}.action-row{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.status-pill{border-radius:999px;align-items:center;min-height:28px;padding:0 10px;font-size:12px;font-weight:800;display:inline-flex}.status-pill--neutral{color:#223046;background:#e8edf5}.status-pill--good{color:#047857;background:#dff7ed}.status-pill--warn{color:#8a5600;background:#fff2cc}.status-pill--bad{color:#b42318;background:#fee4e2}.qr-box{background:#f8fafc;border:1px dashed #b8c4d6;border-radius:8px;place-items:center;min-height:280px;display:grid}.qr-box img{width:min(248px,82vw);height:auto}.qr-placeholder{color:#667085}.code-box{color:#fff;background:#111827;border-radius:8px;gap:8px;margin-top:14px;padding:14px;display:grid}.code-box span{color:#bdc7d8;font-size:13px}.code-box strong{letter-spacing:0;overflow-wrap:anywhere;font-size:clamp(22px,4vw,32px)}.hint,.last-item,.session-meta{color:#667085;line-height:1.7}.copy-link{min-height:38px;margin-top:12px;text-decoration:none}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:12px;display:grid}.ack-list{gap:10px;display:grid}.ack-item{border-bottom:1px solid #edf1f7;align-items:center;gap:8px;min-height:40px;padding:8px 0;display:flex}.ack-item span:last-child{overflow-wrap:anywhere;min-width:0}.session-list{gap:12px;display:grid}.session-card{grid-template-columns:minmax(0,1fr) auto;gap:10px;padding:16px;display:grid}.session-card h3{margin:0 0 4px;font-size:17px}.session-card p{margin:0}.session-card button{justify-self:start}@media (width<=820px){.shell{width:min(100vw - 20px,640px);padding-top:12px}.topbar,.home-grid,.receiver-layout,.sender-layout,.admin-layout,.form-grid{grid-template-columns:1fr}.topbar{display:grid}.nav{justify-content:stretch}.nav button{flex:30%}.hero-panel{min-height:360px}.hero-panel h1{font-size:36px}.hero-panel p{font-size:16px}textarea{min-height:220px}}
