:root{--navy:#08245c;--blue:#087bff;--cyan:#12c6d9;--bg:#f4f8fc;--text:#10213d;--muted:#66768f;--border:#dce7f2}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--blue);text-decoration:none}.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.sidebar{background:linear-gradient(180deg,#061d50,#073179);color:white;padding:20px;display:flex;flex-direction:column;gap:20px;position:sticky;top:0;height:100vh}
.brand img{width:100%;background:white;border-radius:20px;padding:10px}.sidebar nav{display:flex;flex-direction:column;gap:7px}.sidebar nav a{color:#dceaff;padding:11px 13px;border-radius:10px}.sidebar nav a:hover{background:#ffffff18;color:white}
.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:4px}.sidebar-foot small{opacity:.75}.sidebar-foot a{color:#7ee8ff;margin-top:6px}
.content{padding:32px}.page-head{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}.page-head h1{margin:0;font-size:30px}.page-head p{margin:5px 0 0;color:var(--muted)}
.card{background:white;border:1px solid var(--border);border-radius:18px;padding:20px;box-shadow:0 10px 30px #0d2f6410;margin-bottom:20px}
.cards{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.metric span{color:var(--muted);display:block}.metric strong{display:block;font-size:32px;color:var(--navy);margin-top:8px}.metric strong.small{font-size:14px}
.split{display:grid;grid-template-columns:380px 1fr;gap:18px}.grid2,.grid4,.grid5{display:grid;gap:14px}.grid2{grid-template-columns:1fr 1fr}.grid4{grid-template-columns:repeat(4,1fr)}.grid5{grid-template-columns:repeat(5,1fr)}
label{display:block;font-weight:650;margin:0 0 7px}input,select{width:100%;padding:11px 12px;border:1px solid #cbd8e6;border-radius:10px;background:#fff;margin-bottom:14px;font:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:white;border-radius:11px;padding:11px 16px;font-weight:750;color:var(--navy);cursor:pointer}.btn.primary{background:linear-gradient(135deg,var(--blue),var(--cyan));border:0;color:white}
.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{padding:12px;border-bottom:1px solid #e7eef6;text-align:left;vertical-align:top}thead th{color:#4d6280;background:#f8fbfe}.swatch{display:inline-block;width:16px;height:16px;border-radius:5px;margin-right:8px;vertical-align:-3px}
.alert{padding:13px 16px;border-radius:12px;margin-bottom:18px}.alert.danger{background:#fff0f0;color:#a92323}.alert.success{background:#eafbf3;color:#14744a}.alert.warning{background:#fff8dd;color:#7e6000}
.login-wrap{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at top,#e8fbff,#f3f7fb 45%,#eaf1fb)}
.login-card{width:min(430px,92vw);background:#fff;padding:30px;border-radius:26px;box-shadow:0 30px 80px #10336820}.login-logo{display:block;width:240px;max-width:100%;margin:0 auto 20px}.login-card h1{text-align:center;margin-bottom:6px}.login-card p{text-align:center;color:var(--muted);margin-top:0}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:15px}.tabs a{background:white;border:1px solid var(--border);padding:9px 13px;border-radius:999px;color:var(--navy)}.tabs a.active{background:var(--navy);color:white}
.timetable .lesson{min-width:155px}.lesson-card{border-left:5px solid var(--lesson-color);padding:8px 9px;border-radius:8px;background:#f8fbfe;display:flex;flex-direction:column;gap:3px}.lesson-card small{color:var(--muted)}.empty{color:#adb9c9}
@media(max-width:1050px){.cards{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}.grid4,.grid5{grid-template-columns:1fr 1fr}.app-shell{grid-template-columns:88px 1fr}.sidebar .brand img{padding:4px}.sidebar nav a{font-size:0}.sidebar nav a:before{content:"•";font-size:22px}.sidebar-foot strong,.sidebar-foot small{display:none}}
@media(max-width:700px){.content{padding:18px}.app-shell{grid-template-columns:1fr}.sidebar{height:auto;position:static}.sidebar nav{display:grid;grid-template-columns:repeat(3,1fr)}.sidebar nav a{font-size:12px}.sidebar nav a:before{display:none}.cards{grid-template-columns:1fr}.grid2,.grid4,.grid5{grid-template-columns:1fr}}