:root{font-family:Inter,"Segoe UI",Tahoma,Arial,sans-serif;color:#14264a;background:#f4f7fc;line-height:1.5;--blue:#245ce4;--ink:#14264a;--muted:#687995;--line:#e2e9f4;--white:#fff;--danger:#b3261e}*{box-sizing:border-box}body{margin:0}.center-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:0 12px 35px #173e8d12}.login-card{width:min(430px,100%);display:grid;gap:16px}.brand{width:220px;height:55px;object-fit:contain;background:#173e8d;border-radius:12px;padding:8px}h1,h2,h3,p{margin:0}p,small{color:var(--muted)}label{display:grid;gap:7px;font-weight:700}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}textarea{min-height:100px;resize:vertical}button{border:0;border-radius:12px;padding:11px 16px;background:var(--blue);color:#fff;font:inherit;font-weight:800;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:#eaf0ff;color:var(--blue)}button.danger{background:#fff0ee;color:var(--danger)}.message{min-height:24px;color:var(--danger)}#app{min-height:100vh;display:grid;grid-template-columns:250px 1fr}aside{background:#132a55;padding:24px 18px;display:flex;flex-direction:column;gap:24px;position:sticky;top:0;height:100vh}aside nav{display:grid;gap:8px}aside nav button{background:transparent;text-align:right;color:#cbd9f5}aside nav button.active{background:#245ce4;color:#fff}aside #logout{margin-top:auto}main{padding:30px;max-width:1450px;width:100%;margin:auto}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page{display:grid;gap:20px}.stats{display:grid;grid-template-columns:repeat(4,minmax(160px,1fr));gap:14px}.stat strong{font-size:32px;display:block}.toolbar,.actions,.modal-head,.row{display:flex;gap:10px;align-items:center}.toolbar{justify-content:space-between;flex-wrap:wrap}.toolbar input{max-width:380px}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:18px}table{width:100%;border-collapse:collapse;min-width:800px}th,td{text-align:right;padding:13px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#eef3fc;color:var(--muted)}.badge{display:inline-block;border-radius:20px;background:#eaf0ff;color:var(--blue);padding:3px 9px;font-size:12px}.badge.good{background:#dcf5eb;color:#087857}.grid{display:grid;grid-template-columns:repeat(2,minmax(280px,1fr));gap:16px}.course-card{display:grid;gap:12px}.course-card .actions{flex-wrap:wrap}.muted{color:var(--muted)}dialog{border:0;border-radius:22px;width:min(720px,calc(100% - 30px));padding:0;box-shadow:0 30px 90px #07142d55}dialog::backdrop{background:#07142d99}.modal-form{padding:24px;display:grid;gap:18px;max-height:88vh;overflow:auto}.modal-head{justify-content:space-between}.modal-head .icon{font-size:22px;padding:4px 12px}.modal-form #modal-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.modal-form label.wide{grid-column:1/-1}.actions{justify-content:flex-end}.logo-preview{width:min(430px,100%);height:120px;object-fit:contain;background:#173e8d;border-radius:18px;padding:14px}.empty{padding:30px;text-align:center;color:var(--muted)}@media(max-width:850px){#app{grid-template-columns:1fr}aside{height:auto;position:static;padding:14px}aside .brand{width:160px}aside nav{display:flex;overflow:auto}aside nav button{white-space:nowrap}aside #logout{margin:0}main{padding:18px}.stats,.grid{grid-template-columns:1fr 1fr}.modal-form #modal-fields{grid-template-columns:1fr}.modal-form label.wide{grid-column:auto}}@media(max-width:520px){.stats,.grid{grid-template-columns:1fr}header{align-items:flex-start;gap:12px}.toolbar{align-items:stretch}.toolbar input{max-width:none;width:100%}}