:root{
  --brand:#6d28d9; --brand2:#4f46e5; --brand-grad:linear-gradient(135deg,#6d28d9,#4f46e5);
  --bg:#f3f4f6; --card:#ffffff; --ink:#111827; --muted:#6b7280; --line:#e5e7eb;
  --ok:#059669; --okbg:#ecfdf5; --err:#dc2626; --errbg:#fef2f2; --warn:#d97706;
  --radius:16px; --shadow:0 4px 20px rgba(17,24,39,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;overflow-x:hidden}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:15px}
a{text-decoration:none;color:inherit}

/* Layout */
.app{display:flex;min-height:100vh}
.sidebar{width:250px;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;
  position:fixed;top:0;bottom:0;left:0;z-index:40;transition:transform .25s}
.brand{display:flex;align-items:center;gap:10px;padding:20px 18px;font-weight:800;font-size:17px;color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08)}
.brand span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.menu{flex:1;padding:12px 10px;overflow-y:auto}
.menu a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;margin-bottom:4px;
  color:#cbd5e1;font-weight:500;transition:.15s}
.menu a .ic{font-size:18px;width:22px;text-align:center}
.menu a:hover{background:rgba(255,255,255,.06);color:#fff}
.menu a.active{background:var(--brand-grad);color:#fff;box-shadow:0 6px 16px rgba(109,40,217,.4)}
.logout{display:flex;align-items:center;gap:10px;padding:16px 22px;color:#f87171;border-top:1px solid rgba(255,255,255,.08)}
.logout:hover{background:rgba(248,113,113,.1)}

.main{flex:1;margin-left:250px;display:flex;flex-direction:column;min-width:0}
.topbar{background:var(--card);height:64px;display:flex;align-items:center;gap:14px;padding:0 22px;
  position:sticky;top:0;z-index:30;box-shadow:0 1px 0 var(--line)}
.topbar h1{font-size:19px;margin:0;flex:1}
.hamb{display:none;background:none;border:0;font-size:22px;cursor:pointer}
.top-right{display:flex;align-items:center;gap:16px}
.sess-form{display:flex;align-items:center;gap:8px}
.sess-form label{font-size:12px;color:var(--muted);font-weight:600}
.sess-form select{padding:7px 10px;border:1px solid var(--line);border-radius:10px;font-size:14px;background:#fff}
.hsearch input{padding:8px 12px;border:1px solid var(--line);border-radius:20px;font-size:13px;width:200px;background:#f9fafb}
.hsearch input:focus{background:#fff}
.user-chip{display:flex;align-items:center;gap:9px}
.user-chip .av{width:38px;height:38px;border-radius:50%;background:var(--brand-grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700}
.user-chip small{display:block;color:var(--muted);font-size:11px}
.content{padding:22px;max-width:1200px;width:100%;margin:0 auto}

/* Cards & grid */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin-bottom:20px;min-width:0}
.card h2{margin:0 0 16px;font-size:17px}
.card h3{margin:18px 0 10px;font-size:15px;color:var(--brand)}
.grid{display:grid;gap:16px}
.grid>*{min-width:0}            /* let children shrink so tables scroll inside, no page overflow */
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

/* Stat cards */
.stat{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;position:relative;overflow:hidden}
.stat .num{font-size:28px;font-weight:800;margin:6px 0 0}
.stat .lbl{color:var(--muted);font-size:13px;font-weight:600}
.stat .ic{position:absolute;right:16px;top:16px;font-size:26px;opacity:.25}
.stat.p{background:var(--brand-grad);color:#fff}.stat.p .lbl{color:rgba(255,255,255,.8)}

/* Forms */
label.f{display:block;font-size:13px;font-weight:600;color:#374151;margin:0 0 6px}
.field{margin-bottom:14px}
input[type=text],input[type=number],input[type=email],input[type=password],input[type=date],select,textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:11px;font-size:15px;background:#fff;font-family:inherit}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(109,40,217,.14)}
input[type=file]{width:100%;padding:9px;border:1px dashed var(--line);border-radius:11px;background:#fafafa;font-size:13px}
textarea{min-height:70px;resize:vertical}
.hint{font-size:12px;color:var(--muted);margin-top:4px}

.btn{display:inline-flex;align-items:center;gap:7px;padding:11px 20px;border:0;border-radius:11px;
  background:var(--brand-grad);color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:.15s}
.btn:hover{opacity:.92;transform:translateY(-1px)}
.btn.sm{padding:7px 13px;font-size:13px;border-radius:9px}
.btn.gray{background:#e5e7eb;color:#374151}
.btn.green{background:linear-gradient(135deg,#059669,#10b981)}
.btn.red{background:linear-gradient(135deg,#dc2626,#ef4444)}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}

/* Tables */
.table-wrap{overflow-x:auto;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:#f9fafb;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
tbody tr:hover{background:#faf5ff}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge.b-direct{background:#dbeafe;color:#1e40af}
.badge.b-agent{background:#fef3c7;color:#92400e}
.badge.b-ok{background:var(--okbg);color:var(--ok)}
.badge.b-due{background:var(--errbg);color:var(--err)}

/* Alerts */
.alert{padding:13px 16px;border-radius:12px;margin-bottom:18px;font-weight:500}
.alert.ok{background:var(--okbg);color:var(--ok);border:1px solid #a7f3d0}
.alert.err{background:var(--errbg);color:var(--err);border:1px solid #fecaca}

/* Fee two-column */
.ledger-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.ledger{border:1px solid var(--line);border-radius:14px;overflow:hidden;min-width:0}
.ledger .lhd{padding:14px 16px;color:#fff;font-weight:700;display:flex;justify-content:space-between;align-items:center}
.ledger.college .lhd{background:linear-gradient(135deg,#4f46e5,#6366f1)}
.ledger.agent .lhd{background:linear-gradient(135deg,#d97706,#f59e0b)}
.ybox{padding:14px 16px;border-bottom:1px solid var(--line)}
.ybox:last-child{border-bottom:0}
.ybox .yr{font-weight:700;margin-bottom:6px}
.figs{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;margin-bottom:8px}
.figs b{display:block;font-size:15px}
.figs .due b{color:var(--err)} .figs .paid b{color:var(--ok)}

/* Percentage pill */
.pct{display:inline-block;margin-top:6px;padding:4px 10px;border-radius:8px;background:var(--okbg);
  color:var(--ok);font-weight:700;font-size:13px}

/* Student profile head */
.stu-head{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.stu-head img,.stu-head .noimg{width:78px;height:78px;border-radius:16px;object-fit:cover;background:#e5e7eb;
  display:flex;align-items:center;justify-content:center;font-size:30px;color:#9ca3af}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:14px}
.kv .k{color:var(--muted)}

.page-actions{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);
  font-weight:700;margin:22px 0 10px}

/* Login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:var(--brand-grad);padding:20px}
.login-card{background:#fff;border-radius:22px;box-shadow:0 24px 60px rgba(0,0,0,.3);width:100%;max-width:400px;padding:34px}
.login-card .lg{text-align:center;font-size:40px}
.login-card h1{text-align:center;font-size:22px;margin:6px 0 2px}
.login-card p.sub{text-align:center;color:var(--muted);margin:0 0 22px;font-size:14px}

/* Mobile bottom navigation (Android-app style) */
.bottom-nav{display:none}
.nav-scrim{display:none}
@media(max-width:820px){
  .sidebar{transform:translateX(-100%);z-index:60}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .hamb{display:block}
  .g2,.g3,.g4,.ledger-cols{grid-template-columns:1fr}
  .hsearch{display:none}
  .topbar h1{font-size:16px}

  body.appmode .bottom-nav{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:55;
    height:64px;background:#fff;border-top:1px solid var(--line);
    box-shadow:0 -3px 16px rgba(17,24,39,.08);
    padding-bottom:env(safe-area-inset-bottom);
  }
  body.appmode .bottom-nav a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:10.5px;font-weight:600;color:var(--muted);
  }
  body.appmode .bottom-nav a .bi{font-size:21px;line-height:1}
  body.appmode .bottom-nav a.active{color:var(--brand)}
  body.appmode .bottom-nav a.active .bi{transform:translateY(-1px)}
  body.appmode .content{padding-bottom:88px}
  body.appmode .topbar{padding-top:env(safe-area-inset-top)}
  /* hide bottom nav while typing (keyboard open) so it doesn't float over forms */
  body.appmode.kb-open .bottom-nav{display:none}

  /* dark scrim behind the slide-out menu, only when open */
  .sidebar.open ~ .nav-scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:58}
}

/* Never show the app bottom-nav on mouse (desktop/laptop) devices,
   even if the window is narrow — keeps the PC view classic. */
@media (pointer:fine){
  body.appmode .bottom-nav{display:none}
}

/* Searchable combobox (type-to-search select) */
.combo{position:relative}
.combo-menu{position:absolute;left:0;right:0;top:calc(100% + 4px);background:#fff;border:1px solid var(--line);
  border-radius:11px;box-shadow:var(--shadow);max-height:240px;overflow:auto;z-index:25;display:none}
.combo.open .combo-menu{display:block}
.combo-opt{padding:9px 13px;font-size:14px;cursor:pointer;border-bottom:1px solid #f3f4f6}
.combo-opt:last-child{border-bottom:0}
.combo-opt:hover{background:#faf5ff}
.combo-opt.hidden{display:none}

/* App-style search overlay (mobile) */
.search-ov{display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:70;padding:14px}
.search-ov.show{display:block}
.search-ov .search-box{display:flex;align-items:center;gap:8px;background:#fff;border-radius:14px;
  padding:8px 12px;box-shadow:0 12px 40px rgba(0,0,0,.3);margin-top:env(safe-area-inset-top)}
.search-ov .si{font-size:18px}
.search-ov input{flex:1;border:0;font-size:16px;padding:10px 4px}
.search-ov input:focus{outline:none;box-shadow:none}
.search-ov .cx{background:none;border:0;color:var(--brand);font-weight:600;font-size:14px;cursor:pointer}

@media print{
  .sidebar,.topbar,.page-actions,.no-print{display:none!important}
  .main{margin:0}.content{padding:0}
  body{background:#fff}
}