/* Academic ERP - shared styles */
:root{
  --navy:#0f1b3d;
  --navy-2:#16234f;
  --white:#ffffff;
  --primary:#2952e3;
  --primary-dark:#1e3fb8;
  --success:#16a34a;
  --success-bg:#e8f8ee;
  --warning:#f5a623;
  --warning-bg:#fef6e7;
  --danger:#e0393e;
  --danger-bg:#fdeaea;
  --bg:#f4f6fb;
  --text:#1f2430;
  --muted:#6b7280;
  --border:#e5e7eb;
  --shadow:0 1px 3px rgba(15,27,61,.08), 0 1px 2px rgba(15,27,61,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:14px;}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------------- layout ---------------- */
.app{display:flex;min-height:100vh}
.sidebar{
  width:250px;flex:0 0 250px;background:var(--navy);color:#cdd6f0;
  position:sticky;top:0;height:100vh;overflow-y:auto;
}
.sidebar .brand{padding:18px 20px;font-weight:700;font-size:17px;color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);}
.sidebar .brand small{display:block;font-weight:400;font-size:11px;color:#93a1cf;margin-top:2px}
.sidebar nav{padding:10px 0}
.sidebar nav a{
  display:block;padding:11px 20px;color:#cdd6f0;font-size:13.5px;border-left:3px solid transparent;
}
.sidebar nav a:hover{background:rgba(255,255,255,.06);text-decoration:none}
.sidebar nav a.active{background:rgba(41,82,227,.25);border-left-color:var(--primary);color:#fff;font-weight:600}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{
  background:var(--white);border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:14px;padding:10px 22px;position:sticky;top:0;z-index:5;
}
.topbar .inst{font-weight:700;font-size:15px;color:var(--navy);white-space:nowrap}
.topbar .spacer{flex:1}
.topbar select, .topbar input[type=search]{
  border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:13px;background:#fff;
}
.topbar .user{display:flex;align-items:center;gap:8px;white-space:nowrap}
.topbar .avatar{
  width:30px;height:30px;border-radius:50%;background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;
}
.badge-role{background:var(--navy);color:#fff;font-size:11px;padding:2px 8px;border-radius:10px}
.content{padding:22px;flex:1}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.page-head h1{font-size:20px;margin:0 0 4px}
.breadcrumb{font-size:12.5px;color:var(--muted);margin-bottom:6px}
.breadcrumb a{color:var(--muted)}

/* ---------------- cards / kpi ---------------- */
.card{background:var(--white);border-radius:10px;box-shadow:var(--shadow);padding:18px;margin-bottom:18px}
.kpi-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:18px}
.kpi{background:var(--white);border-radius:10px;box-shadow:var(--shadow);padding:16px;cursor:default}
.kpi a{color:inherit}
.kpi .val{font-size:26px;font-weight:700;color:var(--navy)}
.kpi .lbl{font-size:12px;color:var(--muted);margin-top:4px}
.kpi.warn .val{color:var(--warning)}
.kpi.danger .val{color:var(--danger)}
.kpi.success .val{color:var(--success)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.grid-3{display:grid;grid-template-columns:2fr 1fr;gap:18px}
@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* ---------------- tables ---------------- */
table{width:100%;border-collapse:collapse;font-size:13.3px}
table.simple th, table.simple td{padding:9px 10px;border-bottom:1px solid var(--border);text-align:left}
table.simple th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.02em}
table.simple tr:hover td{background:#f9fafc}
.table-wrap{overflow-x:auto}
.table-toolbar{display:flex;gap:10px;align-items:center;margin-bottom:12px;flex-wrap:wrap}

/* ---------------- badges ---------------- */
.badge{display:inline-block;padding:3px 9px;border-radius:12px;font-size:11.5px;font-weight:600}
.badge.green{background:var(--success-bg);color:var(--success)}
.badge.amber{background:var(--warning-bg);color:#a05a00}
.badge.red{background:var(--danger-bg);color:var(--danger)}
.badge.grey{background:#eef0f4;color:var(--muted)}
.badge.blue{background:#e8edfd;color:var(--primary)}

/* ---------------- forms/buttons ---------------- */
label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px;font-weight:600}
input,select,textarea{
  width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:6px;font-size:13.5px;
  font-family:inherit;background:#fff;color:var(--text);
}
textarea{min-height:70px}
.field{margin-bottom:14px}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}
.btn{
  display:inline-block;padding:8px 16px;border-radius:6px;border:1px solid transparent;
  background:var(--primary);color:#fff;font-size:13.5px;font-weight:600;cursor:pointer;
}
.btn:hover{background:var(--primary-dark);text-decoration:none}
.btn.secondary{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn.secondary:hover{background:#eef2ff}
.btn.success{background:var(--success)}
.btn.danger{background:var(--danger)}
.btn.ghost{background:transparent;color:var(--muted);border-color:var(--border)}
.btn.sm{padding:5px 10px;font-size:12px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---------------- tabs ---------------- */
.tabs{display:flex;gap:2px;border-bottom:2px solid var(--border);margin-bottom:18px;flex-wrap:wrap}
.tabs a, .tabs button{
  padding:9px 16px;border:none;background:none;font-size:13.5px;color:var(--muted);cursor:pointer;
  border-bottom:2px solid transparent;margin-bottom:-2px;font-weight:600;
}
.tabs a.active, .tabs button.active{color:var(--primary);border-bottom-color:var(--primary)}

/* ---------------- misc ---------------- */
.progress{background:#eef0f4;border-radius:8px;height:9px;overflow:hidden}
.progress > div{background:var(--primary);height:100%}
.progress.success > div{background:var(--success)}
.flash{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:13.5px}
.flash.success{background:var(--success-bg);color:var(--success)}
.flash.error{background:var(--danger-bg);color:var(--danger)}
.muted{color:var(--muted)}
.right{text-align:right}
.center{text-align:center}
.mt0{margin-top:0}
.small{font-size:12px}
hr{border:none;border-top:1px solid var(--border);margin:16px 0}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.chip{padding:6px 12px;border-radius:16px;background:#eef0f4;font-size:12.5px;color:var(--text);cursor:pointer;border:1px solid var(--border)}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* calendar grid */
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-head{font-size:11px;color:var(--muted);text-transform:uppercase;text-align:center;padding-bottom:4px}
.cal-cell{background:#fff;border:1px solid var(--border);border-radius:6px;min-height:76px;padding:6px;font-size:11.5px}
.cal-cell .d{font-weight:700;color:var(--navy);margin-bottom:3px}
.cal-cell .ev{border-radius:4px;padding:1px 5px;margin-bottom:2px;color:#fff;font-size:10.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cal-cell.empty{background:transparent;border:none}

/* timetable grid */
.tt-grid{display:grid;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.tt-grid .tt-cell{border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:6px;font-size:11.5px;min-height:56px;background:#fff}
.tt-grid .tt-head{background:#f4f6fb;font-weight:700;text-align:center;font-size:12px;color:var(--navy)}

/* co-po matrix */
.matrix th,.matrix td{text-align:center;min-width:44px}
.matrix select{padding:3px;font-size:12px}

@media(max-width:760px){
  .sidebar{position:fixed;left:-260px;transition:left .2s;z-index:20}
  .sidebar.open{left:0}
  .content{padding:14px}
  .kpi-row{grid-template-columns:repeat(2,1fr)}
}

/* ---------------- Manage Timetable (weekly, time-based) ---------------- */
.tt-scroll{overflow-x:auto}
.tt-week{display:grid;grid-template-columns:repeat(7,minmax(190px,1fr));border:2px solid #b9bec9;min-width:1330px;background:#fff}
.tt-col{border-right:1px solid #cfd3dc}
.tt-col:last-child{border-right:0}
.tt-day{text-align:center;font-weight:600;padding:8px 4px;border-bottom:1px solid #cfd3dc;background:#fafbfd}
.tt-add{text-align:center;padding:4px;border-bottom:1px solid #e1e4ea}
.tt-slot{padding:7px 6px 8px;text-align:center;font-size:11.5px;line-height:1.45;border-bottom:1px solid #e1e4ea}
.tt-slot .tt-time{color:#333}
.tt-slot .tt-sub{color:#1e3fb8}
.tt-slot .tt-fac{color:#444}
.tt-slot .tt-room{color:#777}
.tt-slot .tt-cx{margin-top:2px;color:#a15a00;font-size:10.5px}
.tt-slot .tt-acts{display:flex;gap:4px;justify-content:center;margin-top:5px}
.tt-slot.cancelled-today{background:#fff8ec}
.tt-b{border:0;border-radius:3px;color:#fff;font-size:11px;padding:3px 9px;cursor:pointer}
.tt-b.green{background:#1aa37a}.tt-b.orange{background:#f0ad4e}.tt-b.blue{background:#2a6ebb}.tt-b.red{background:#d9534f}
.tt-b.cyan{background:#18a2b8}
.tt-empty{padding:10px;color:#9aa1ad;text-align:center;font-size:11px}

/* a value the user may see but not edit (a name is corrected in the Student Master) */
.readonly{padding:8px 10px;border:1px dashed #ccd;border-radius:6px;background:#f7f7fb;color:#333;font-weight:600}