:root{--navy:#102a43;--ink:#20354a;--muted:#718096;--line:#e6edf3;--bg:#f6f9fc;--teal:#18a5a5;--gold:#f2bd45;--red:#d95d58;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px Arial,sans-serif}.app-shell{min-height:100vh}.topbar{height:72px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:4}.brand{display:flex;align-items:center;gap:11px;color:var(--navy);font-size:23px;font-weight:800}.brand img{width:38px;height:38px;object-fit:contain}.topbar-actions{display:flex;align-items:center;gap:16px}.icon-button,.avatar{border:0;background:transparent;color:var(--navy);font-size:22px;cursor:pointer}.avatar{background:var(--gold);border-radius:50%;width:38px;height:38px;font-size:12px;font-weight:bold}.mobile-menu{display:none}.layout{display:flex;min-height:calc(100vh - 72px)}.sidebar{width:260px;background:var(--navy);color:#dce8f2;padding:20px 15px;display:flex;flex-direction:column}.school-switcher{display:flex;align-items:center;gap:9px;border-bottom:1px solid #33506c;padding:0 8px 20px}.school-switcher strong,.school-switcher small{display:block}.school-switcher strong{font-size:12px;color:#fff}.school-switcher small{font-size:11px;color:#9cb3c9;margin-top:4px}.school-switcher>span:last-child{margin-left:auto}.school-logo{display:grid;place-items:center;background:var(--gold);color:var(--navy);font-weight:800;border-radius:10px;width:36px;height:36px}nav{padding-top:22px}.nav-item{display:flex;gap:13px;align-items:center;width:100%;border:0;background:transparent;color:#b5c8d9;padding:13px 12px;border-radius:10px;text-align:left;font-size:13px;cursor:pointer;margin-bottom:4px}.nav-item:hover,.nav-item.active{background:#21435f;color:#fff}.nav-item b{margin-left:auto;background:var(--teal);padding:2px 7px;border-radius:10px;font-size:10px}.sidebar-bottom{margin-top:auto;color:#9cb3c9;font-size:11px;padding:15px 10px}.connection{color:#d4e7da;margin-bottom:9px}.connection span{display:inline-block;width:7px;height:7px;border-radius:50%;background:#52c878;margin-right:5px}.main{flex:1;padding:32px 42px;max-width:1280px;margin:auto;width:100%}.eyebrow{color:var(--teal);font-weight:bold;text-transform:uppercase;letter-spacing:1px;font-size:11px}.page-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:27px}.page-head h1{margin:7px 0 0;font-size:30px;color:var(--navy)}.page-head p{color:var(--muted);margin:7px 0 0}.primary{background:var(--teal);color:#fff;border:0;border-radius:9px;padding:12px 17px;font-weight:bold;cursor:pointer}.secondary{background:#fff;border:1px solid var(--line);color:var(--navy);border-radius:9px;padding:11px 15px;font-weight:bold;cursor:pointer}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.card,.panel{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;box-shadow:0 4px 15px #183b5310}.stat{display:flex;justify-content:space-between}.stat h2{margin:8px 0 0;font-size:27px;color:var(--navy)}.stat-icon{width:39px;height:39px;border-radius:11px;display:grid;place-items:center;background:#e5f6f5;color:var(--teal);font-size:20px}.muted{color:var(--muted);font-size:12px}.dashboard-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:18px;margin-top:18px}.panel h3{margin:0 0 17px;color:var(--navy);font-size:16px}.panel-head{display:flex;justify-content:space-between;align-items:center}.link{color:var(--teal);font-size:12px;cursor:pointer}.feed-item,.message-row{border-top:1px solid var(--line);padding:14px 0;display:flex;gap:12px}.feed-item:first-of-type,.message-row:first-of-type{border-top:0;padding-top:0}.feed-avatar{width:35px;height:35px;border-radius:11px;background:#eaf1f8;display:grid;place-items:center;color:var(--navy);font-weight:bold;flex:none}.feed-item strong,.feed-item small{display:block}.feed-item small{color:var(--muted);margin-top:5px}.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.quick{border:1px solid var(--line);border-radius:10px;padding:13px;background:#fbfdff;text-align:left;cursor:pointer;color:var(--navy)}.quick:hover{border-color:var(--teal)}.quick b{display:block;margin-top:8px}.conversation-layout{display:grid;grid-template-columns:310px 1fr;gap:18px;height:calc(100vh - 150px)}.conversation-list{padding:0;overflow:auto}.conversation-list .panel-head{padding:20px}.message-pane{display:flex;flex-direction:column;padding:0;overflow:hidden}.messages{padding:20px;overflow:auto;flex:1}.bubble{max-width:70%;padding:11px 14px;border-radius:14px;background:#eef3f7;margin:6px 0}.bubble.mine{background:#d8f3ef;margin-left:auto}.composer{border-top:1px solid var(--line);padding:13px;display:flex;gap:10px}.composer input{flex:1;border:1px solid var(--line);border-radius:9px;padding:12px}.empty{padding:42px 10px;text-align:center;color:var(--muted)}.empty h3{color:var(--navy)}.table{width:100%;border-collapse:collapse}.table th,.table td{text-align:left;padding:14px 8px;border-bottom:1px solid var(--line);font-size:13px}.table th{font-size:11px;color:var(--muted);text-transform:uppercase}.badge{display:inline-block;border-radius:20px;padding:5px 9px;font-size:11px;background:#e5f6f5;color:#087c78}.badge.pending{background:#fff6dc;color:#9b6c00}.badge.alert{background:#fee8e6;color:#af413b}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:7px}.field label{font-size:12px;font-weight:bold;color:var(--navy)}.field input,.field select,.field textarea{border:1px solid var(--line);border-radius:9px;padding:12px;font:inherit}.field textarea{min-height:110px;resize:vertical}.field.full{grid-column:1/-1}.toast{position:fixed;right:25px;bottom:25px;background:var(--navy);color:#fff;padding:13px 17px;border-radius:9px;display:none;z-index:8}.toast.show{display:block}@media(max-width:800px){.topbar{padding:0 16px;height:62px}.mobile-menu{display:block;margin-right:10px}.brand{margin-right:auto;font-size:20px}.layout{min-height:calc(100vh - 62px)}.sidebar{position:fixed;left:-280px;top:62px;bottom:0;z-index:3;transition:left .2s}.sidebar.open{left:0}.main{padding:24px 16px}.page-head{align-items:flex-start;gap:15px;flex-direction:column}.page-head h1{font-size:26px}.cards{grid-template-columns:1fr 1fr}.dashboard-grid,.conversation-layout{grid-template-columns:1fr}.conversation-layout{height:auto}.conversation-list{max-height:275px}.message-pane{min-height:430px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.table{min-width:600px}.panel.table-wrap{overflow:auto}}
/* Enhanced cross-platform controls */
.global-search{display:flex;align-items:center;gap:6px;background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:8px 11px;color:var(--muted)}
.global-search input{border:0;background:transparent;outline:0;width:180px;font:13px Arial}
@media(max-width:800px){.global-search{display:none}}
/* Authentication and onboarding foundation */
.auth-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at top right,#dff6f3,transparent 38%),var(--bg)}.auth-card{width:min(100%,430px);background:#fff;border:1px solid var(--line);border-radius:22px;padding:42px;box-shadow:0 18px 50px #183b5318}.auth-logo{width:78px;height:78px;object-fit:contain;margin-bottom:18px}.auth-card h1{color:var(--navy);font-size:30px;margin:8px 0}.auth-button{width:100%;margin-top:18px}.auth-divider{border-top:1px solid var(--line);margin:28px 0 0;text-align:center}.auth-divider span{position:relative;top:-9px;background:#fff;padding:0 10px;color:var(--muted);font-size:12px}.center{text-align:center}