:root{--navy:#173f5f;--bg:#f3f6f8;--card:#fff;--line:#d8e2e8;--ink:#142a3a;--muted:#6b7d8b}
*{box-sizing:border-box}.hidden{display:none!important}
body{margin:0;font-family:"Noto Sans KR","Malgun Gothic",sans-serif;background:var(--bg);color:var(--ink)}
.shell{min-height:100vh;display:grid;grid-template-columns:260px 1fr}
.sidebar{background:#153f5d;color:#fff;padding:28px 20px;display:flex;flex-direction:column;gap:26px}
.brand{color:#fff;text-decoration:none}.brand strong{display:block;font-size:21px}.brand small{display:block;margin-top:5px;opacity:.72}
.nav{display:grid;gap:8px}.nav button{border:0;background:transparent;color:#dce9f1;text-align:left;padding:14px 15px;border-radius:10px;font-size:16px;font-weight:800;cursor:pointer}.nav button.active,.nav button:hover{background:#ffffff18;color:#fff}
.sidebar-foot{margin-top:auto;font-size:13px;line-height:1.6;opacity:.76}
.main{padding:34px 38px 64px}.center{padding:80px 20px;text-align:center;color:var(--muted)}
.login-card{width:min(520px,calc(100% - 32px));margin:70px auto;padding:30px;background:#fff;border:1px solid var(--line);border-radius:18px}.login-card h1{font-size:30px}.login-card form{display:grid;gap:16px}.login-card label{display:grid;gap:7px;font-weight:800}.login-card input{height:52px;border:1px solid #bdccd7;border-radius:10px;padding:0 13px;font-size:16px}.primary{height:52px;border:0;border-radius:10px;background:var(--navy);color:#fff;font-size:16px;font-weight:850}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:22px;margin-bottom:28px}.topbar h1{margin:0;font-size:34px;letter-spacing:-.04em}.topbar p{margin:8px 0 0;color:var(--muted)}
.top-actions{display:flex;align-items:center;gap:12px}.top-actions button{height:42px;border:1px solid #bdccd7;border-radius:9px;background:#fff;font-weight:800}.admin-badge{padding:11px 15px;border-radius:999px;background:#e8f4ed;color:#2d6a50;font-weight:850;white-space:nowrap}
.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}.summary{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}.summary strong{display:block;font-size:28px;color:var(--navy)}.summary span{display:block;margin-top:4px;color:var(--muted);font-size:14px}
.toolbar{display:grid;grid-template-columns:1fr 220px 190px;gap:12px;margin-bottom:18px}.toolbar input,.toolbar select{height:52px;border:1px solid #bccdd8;border-radius:11px;background:#fff;padding:0 14px;font-size:16px}
.table-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 24px rgba(25,55,74,.04)}.table-head,.academy-row{display:grid;grid-template-columns:minmax(260px,1.4fr) 150px 140px 140px 160px 130px;gap:14px;align-items:center}.table-head{padding:14px 20px;background:#edf3f6;color:#536a79;font-size:13px;font-weight:850}.academy-row{padding:18px 20px;border-top:1px solid #edf1f4}.academy-row:hover{background:#f8fbfc}.academy strong{display:block;font-size:18px}.academy small{display:block;margin-top:4px;color:var(--muted)}
.status{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:800}.dot{width:9px;height:9px;border-radius:50%;background:#4a9b74}.dot.gray{background:#9aa8b2}.manage{height:42px;border:0;border-radius:9px;background:#1f5273;color:#fff;font-weight:850;cursor:pointer}
.central-tools{margin-top:26px;display:grid;grid-template-columns:1fr;gap:18px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.tool-card h2{margin:0 0 8px;font-size:22px}.tool-card p{margin:0;color:var(--muted);line-height:1.65}.tool-card button{margin-top:18px;min-height:48px;border:1px solid #b9cbd7;border-radius:10px;background:#f8fbfd;color:#214762;font-size:15px;font-weight:850}
.empty{padding:40px 20px;text-align:center;color:var(--muted)}
@media(max-width:1100px){.shell{grid-template-columns:1fr}.sidebar{position:sticky;top:0;z-index:10;flex-direction:row;align-items:center;padding:14px 16px}.nav{display:flex}.sidebar-foot{display:none}.main{padding:22px}.summary-grid{grid-template-columns:repeat(2,1fr)}.toolbar{grid-template-columns:1fr}.table-head{display:none}.academy-row{grid-template-columns:1fr 1fr}}

.nav .nav-link{display:block;color:#dce9f1;text-decoration:none;padding:14px 15px;border-radius:10px;font-size:16px;font-weight:800}
.nav .nav-link:hover{background:#ffffff18;color:#fff}