:root{
  --bg:#f4f6fb; --card:#fff; --ink:#1f2937; --muted:#6b7280;
  --brand:#3b5bdb; --brand-dk:#2f47ad; --ok:#0f9d58; --warn:#f59f00; --bad:#e03131;
  --line:#e5e7eb; --radius:12px;
}
*{box-sizing:border-box} 
body{margin:0;font-family:'Segoe UI',system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--brand);text-decoration:none}
.layout{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{width:240px;background:#1b2135;color:#c9d1e4;flex-shrink:0;padding:0 0 30px}
.sidebar .brand{padding:20px 18px;font-size:17px;font-weight:700;color:#fff;border-bottom:1px solid #2b3350}
.sidebar .brand small{display:block;font-weight:400;font-size:11px;color:#8892b0;margin-top:3px}
.sidebar nav a{display:block;padding:11px 18px;color:#c9d1e4;border-left:3px solid transparent;font-size:13.5px}
.sidebar nav a:hover{background:#242c45;color:#fff}
.sidebar nav a.active{background:#242c45;color:#fff;border-left-color:var(--brand)}
.sidebar .sec{padding:16px 18px 6px;font-size:10.5px;letter-spacing:1px;color:#67718f;text-transform:uppercase}

/* Main */
.main{flex:1;min-width:0}
.topbar{background:#fff;border-bottom:1px solid var(--line);padding:12px 24px;display:flex;justify-content:space-between;align-items:center}
.topbar h1{font-size:18px;margin:0}
.content{padding:22px 24px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px;box-shadow:0 1px 2px rgba(16,24,40,.04)}
.card h2{margin:0 0 14px;font-size:15px;border-bottom:1px solid var(--line);padding-bottom:10px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g2,.g3,.g4{grid-template-columns:1fr}.sidebar{width:64px}.sidebar .brand small,.sidebar nav a span,.sidebar .sec{display:none}}

/* Forms */
label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin:0 0 5px}
input[type=text],input[type=date],input[type=number],input[type=password],input[type=email],select,textarea{
  width:100%;padding:8px 10px;border:1px solid #d0d5dd;border-radius:8px;background:#fff;font-size:13.5px;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(59,91,219,.12)}
.field{margin-bottom:12px}
.btn{display:inline-block;padding:9px 16px;border:0;border-radius:8px;background:var(--brand);color:#fff;font-weight:600;cursor:pointer;font-size:13.5px}
.btn:hover{background:var(--brand-dk)}
.btn.sec{background:#fff;color:var(--ink);border:1px solid #d0d5dd}
.btn.ok{background:var(--ok)} .btn.bad{background:var(--bad)} .btn.sm{padding:5px 10px;font-size:12px}

/* Tables */
table.tbl{width:100%;border-collapse:collapse;background:#fff}
table.tbl th{background:#f1f3f9;text-align:left;padding:9px 10px;font-size:12px;color:#475069;border-bottom:1px solid var(--line)}
table.tbl td{padding:8px 10px;border-bottom:1px solid #f0f1f5}
table.tbl tr:hover td{background:#fafbff}

/* Timetable grid */
table.tt{width:100%;border-collapse:collapse;table-layout:fixed}
table.tt th,table.tt td{border:1px solid var(--line);padding:5px;vertical-align:top;font-size:12px}
table.tt th{background:#f1f3f9;text-align:center}
table.tt .dayhead{background:#eef1fb;font-weight:700;width:95px}
table.tt select{padding:4px;font-size:11.5px;border-radius:6px}
.cell-free{background:#f7fdf9;color:#0f9d58;text-align:center}
.cell-busy{background:#fff}

.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:700}
.b-ok{background:#e6f4ea;color:#0f9d58}.b-warn{background:#fff4e0;color:#b26a00}
.b-bad{background:#fde8e8;color:#c92a2a}.b-info{background:#e8edfd;color:#2f47ad}
.b-grey{background:#eef0f4;color:#5b6478}

.alert{padding:11px 14px;border-radius:9px;margin-bottom:14px;font-size:13.5px}
.alert.success{background:#e6f4ea;color:#14683b;border:1px solid #b7e1c6}
.alert.error{background:#fde8e8;color:#a32323;border:1px solid #f5b5b5}
.alert.info{background:#e8edfd;color:#26397f;border:1px solid #c2cdf5}

.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat .n{font-size:26px;font-weight:700} .stat .l{color:var(--muted);font-size:12px;margin-top:3px}
.bar{height:8px;background:#eef0f4;border-radius:6px;overflow:hidden}
.bar > i{display:block;height:100%;background:var(--brand)}
.muted{color:var(--muted)} .right{text-align:right} .center{text-align:center}
.flex{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}

@media print{.sidebar,.topbar,.noprint{display:none!important}.content{padding:0}.card{border:0;box-shadow:none}}
/* Teacher subject labels */
.teacher-subjects-inline{
    display:inline-flex;
    flex-wrap:wrap;
    gap:4px;
    margin-left:5px;
    vertical-align:middle;
}
.teacher-subject{
    display:inline-block;
    padding:2px 6px;
    border-radius:10px;
    font-size:10px;
    line-height:1.2;
    font-weight:700;
    white-space:nowrap;
    border:1px solid transparent;
}
.subject-main{
    background:#dbeafe;
    color:#1d4ed8;
    border-color:#93c5fd;
}
.subject-secondary{
    background:#fef3c7;
    color:#a16207;
    border-color:#fcd34d;
}
.subject-none{
    background:#f3f4f6;
    color:#6b7280;
    border-color:#d1d5db;
}


/* Relief star ratings */
.stars{white-space:nowrap;letter-spacing:2px;font-size:18px;line-height:1}
.stars .on{color:#f5a300}
.stars .off{color:#d5d9e2}
.star-hero{display:flex;align-items:center;gap:16px;padding:16px 18px;margin-bottom:14px;border:1px solid #fcd34d;border-radius:var(--radius);background:linear-gradient(135deg,#fffbe6,#fff4d1)}
.star-hero .trophy{font-size:38px;line-height:1}
.star-hero .star-name{font-size:20px;font-weight:700;margin:2px 0 6px}
.period-nav{display:flex;gap:8px;align-items:flex-end;flex-wrap:wrap;margin-bottom:14px}
tr.winner-row td{background:#fffbe6}