:root{
    --bg:#f3f7fb;
    --card:#ffffff;
    --line:#d9e3ef;
    --text:#0b1b34;
    --muted:#60718c;
    --blue:#0057ff;
    --green:#00c98d;
    --cyan:#1fc7d4;
    --navy:#0c2d57;
    --shadow:0 18px 45px rgba(10,45,90,.10);
    --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}
.app-shell{display:flex;min-height:100vh}
.sidebar{width:250px;background:#fff;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);box-shadow:12px 0 28px rgba(0,40,100,.05);z-index:50;transition:.35s ease;display:flex;flex-direction:column}
.sidebar.collapsed{width:78px}.sidebar.collapsed .brand div:last-child,.sidebar.collapsed .menu-label,.sidebar.collapsed .menu-item b{display:none}.sidebar.collapsed .brand{justify-content:center}.sidebar.collapsed .menu-item{justify-content:center;padding:13px 0}.sidebar.collapsed .sidebar-actions{grid-template-columns:1fr;padding:12px 18px}
.brand{height:74px;display:flex;align-items:center;gap:12px;padding:0 18px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border-bottom-right-radius:28px}
.brand-logo{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--green),var(--cyan));display:grid;place-items:center;font-weight:900;font-size:23px;box-shadow:0 10px 24px rgba(0,201,141,.35)}
.brand strong{display:block;font-size:22px}.brand span{font-size:12px;opacity:.85;letter-spacing:.08em;text-transform:uppercase}
.menu{padding:22px 14px;overflow:auto;flex:1}.menu-label{font-size:13px;color:var(--blue);font-weight:800;background:#eef5ff;width:max-content;padding:6px 14px;border-radius:0 20px 20px 0;margin:10px 0}
.menu-item{display:flex;align-items:center;gap:14px;padding:13px 16px;margin:8px 0;color:#61708d;text-decoration:none;border-radius:12px;transition:.25s ease;font-size:15px}.menu-item span{font-size:20px;color:#50658b}.menu-item:hover,.menu-item.active{background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;transform:translateX(4px);box-shadow:0 12px 25px rgba(0,87,255,.18)}.menu-item:hover span,.menu-item.active span{color:#fff}
.sidebar-actions{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;border:1px solid var(--line);border-radius:28px;margin:12px;padding:8px}.sidebar-actions button{border:1px solid var(--line);background:#fff;border-radius:50%;height:38px;color:var(--blue);cursor:pointer;transition:.25s}.sidebar-actions button:hover{background:var(--blue);color:#fff}
.main{margin-left:250px;width:calc(100% - 250px);transition:.35s ease}.sidebar-collapsed .main{margin-left:78px;width:calc(100% - 78px)}
.topbar{height:64px;background:linear-gradient(135deg,var(--navy),var(--blue));display:flex;align-items:center;gap:18px;padding:0 24px;position:sticky;top:0;z-index:40;box-shadow:0 8px 24px rgba(0,45,100,.13)}
.toggle{height:38px;width:38px;border:0;border-radius:8px;background:rgba(255,255,255,.16);color:#fff;font-size:20px;cursor:pointer}.top-search{margin-left:auto;background:#fff;border-radius:22px;width:270px;height:38px;display:flex;align-items:center;gap:8px;padding:0 15px;color:var(--blue)}.top-search input{border:0;outline:0;width:100%;font-size:14px}.top-icons{display:flex;align-items:center;gap:12px}.top-icons button{position:relative;border:0;background:rgba(255,255,255,.14);color:#fff;width:42px;height:42px;border-radius:50%;cursor:pointer}.top-icons em{position:absolute;right:-5px;top:-7px;background:#fff;color:var(--blue);font-style:normal;font-size:11px;font-weight:800;padding:3px 7px;border-radius:12px}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--green),var(--cyan));font-weight:900;color:#fff;border:3px solid rgba(255,255,255,.75)}
.content{padding:22px 24px 40px}.page-title{display:flex;gap:16px;align-items:center;margin-bottom:18px}.title-icon{width:48px;height:48px;background:#fff;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;color:var(--blue);font-size:24px}.page-title h1{font-size:28px;margin:0}.page-title p{margin:4px 0 0;color:var(--muted)}.page-title span{margin:0 8px;color:var(--blue)}
.notice{background:#17221f;color:#fff;padding:12px 18px;border-radius:8px;font-size:14px;font-weight:700;margin-bottom:24px}
.hero{background:linear-gradient(135deg,var(--blue),var(--green));border-radius:var(--radius);color:#fff;padding:30px;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--shadow);overflow:hidden;position:relative}.hero:after{content:"";position:absolute;right:-90px;top:-90px;width:260px;height:260px;background:rgba(255,255,255,.14);border-radius:50%}.profile-card{display:flex;gap:18px;align-items:center;position:relative;z-index:1}.profile-avatar{width:76px;height:76px;border-radius:50%;background:#fff;color:var(--blue);display:grid;place-items:center;font-size:38px;font-weight:900;border:4px solid rgba(255,255,255,.45)}.hero h2{font-size:26px;margin:0}.hero p{margin:8px 0 16px}.mini-services{display:flex;gap:18px;flex-wrap:wrap}.mini-services span{display:flex;align-items:center;gap:8px;font-size:13px}.mini-services i{width:34px;height:34px;background:rgba(255,255,255,.2);border-radius:8px;display:inline-block}.hero-stats{display:flex;gap:28px;position:relative;z-index:1}.hero-stats div{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);border-radius:18px;padding:16px 18px;min-width:105px;text-align:center}.hero-stats span{display:block;font-size:12px}.hero-stats strong{font-size:24px}
.kpi-grid{display:grid;grid-template-columns:repeat(4,minmax(180px,1fr));gap:22px;margin:24px 0}.kpi-card{border-radius:var(--radius);padding:22px;display:flex;justify-content:space-between;align-items:center;color:#fff;box-shadow:var(--shadow);min-height:130px;overflow:hidden;position:relative}.kpi-card.blue{background:linear-gradient(135deg,#0057ff,#277cff)}.kpi-card.green{background:linear-gradient(135deg,#00a875,#00c98d)}.kpi-card.cyan{background:linear-gradient(135deg,#00a4c7,#1fc7d4)}.kpi-card.navy{background:linear-gradient(135deg,#0c2d57,#0f5aa8)}.kpi-card:after{content:"";position:absolute;right:-40px;top:-40px;width:140px;height:140px;background:rgba(255,255,255,.12);border-radius:50%}.kpi-icon{display:grid;place-items:center;width:46px;height:46px;border:1px solid rgba(255,255,255,.55);border-radius:12px;font-size:22px;margin-bottom:8px}.kpi-card h3{font-size:36px;margin:0}.kpi-card p{margin:4px 0}.kpi-card small{opacity:.86}.kpi-bar{width:160px;height:5px;background:rgba(255,255,255,.28);border-radius:8px;margin-top:16px}.kpi-bar i{display:block;height:100%;background:#fff;border-radius:8px}.ring{width:68px;height:68px;border-radius:50%;background:conic-gradient(#fff calc(var(--value)*1%),rgba(255,255,255,.35) 0);display:grid;place-items:center;z-index:1}.ring b{width:50px;height:50px;background:rgba(255,255,255,.18);border-radius:50%;display:grid;place-items:center;font-size:12px}
.chart-card,.panel,.cta-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:24px}.card-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:20px}.card-head h2,.panel h2{margin:0 0 8px;font-size:20px}.card-head span{color:var(--muted);font-size:13px}
.two-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.list-row{display:flex;align-items:center;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}.list-row:last-child{border-bottom:0}.row-icon{width:42px;height:42px;border-radius:10px;background:#eaf4ff;color:var(--blue);display:grid;place-items:center;font-size:20px}.row-icon.yellow{background:#fff7df;color:#f5a400}.row-icon.big{width:56px;height:56px}.list-row strong{display:block}.list-row p{margin:4px 0 0;color:var(--muted);font-size:13px}.status{margin-left:auto;background:#dcfff4;color:#008b62;padding:8px 14px;border-radius:18px;font-size:12px;font-weight:800}.status.alt{background:#eaf4ff;color:var(--blue)}
.summary-boxes{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:10px 0 18px}.summary-boxes div{background:#f4f8fd;border:1px solid var(--line);border-radius:10px;text-align:center;padding:13px}.summary-boxes span{display:block;color:var(--muted);font-size:12px}.summary-boxes b{display:block;margin-top:6px;color:var(--navy)}
.teacher-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.teacher-card{text-align:center;border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff;transition:.25s}.teacher-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}.teacher-avatar{width:76px;height:76px;margin:0 auto 12px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:30px;font-weight:900}.teacher-card.green .teacher-avatar{background:var(--green)}.teacher-card.blue .teacher-avatar{background:var(--blue)}.teacher-card.cyan .teacher-avatar{background:var(--cyan)}.teacher-card.navy .teacher-avatar{background:var(--navy)}.teacher-card strong{display:block}.teacher-card span{color:var(--muted);font-size:13px}.teacher-card p{color:#e91959;letter-spacing:3px}
.cta-card{display:flex;align-items:center;gap:18px}.cta-card p{color:var(--muted);margin:6px 0}.cta-card button{margin-left:auto;border:0;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;padding:13px 24px;font-weight:800;cursor:pointer;box-shadow:0 12px 25px rgba(0,87,255,.18)}
footer{color:var(--muted);font-size:13px;padding:10px 0 20px}.reveal{opacity:0;transform:translateY(24px);transition:opacity .65s ease,transform .65s ease}.reveal.show{opacity:1;transform:none}
@media(max-width:1200px){.kpi-grid{grid-template-columns:repeat(2,1fr)}.two-grid{grid-template-columns:1fr}.teacher-grid{grid-template-columns:repeat(2,1fr)}.hero{align-items:flex-start;gap:20px;flex-direction:column}.hero-stats{flex-wrap:wrap}}
@media(max-width:760px){.sidebar{transform:translateX(-100%)}.sidebar.collapsed{transform:translateX(0);width:250px}.sidebar.collapsed .brand div:last-child,.sidebar.collapsed .menu-label,.sidebar.collapsed .menu-item b{display:block}.sidebar.collapsed .menu-item{justify-content:flex-start;padding:13px 16px}.main,.sidebar-collapsed .main{margin-left:0;width:100%}.top-search{width:180px}.content{padding:16px}.kpi-grid,.teacher-grid,.summary-boxes{grid-template-columns:1fr}.hero-stats{width:100%;display:grid;grid-template-columns:1fr}.cta-card{align-items:flex-start;flex-direction:column}.cta-card button{margin-left:0;width:100%}}