:root {
  --primary:#1a3a5c; --primary-light:#24507a; --accent:#c8993a; --accent-light:#e8b84b;
  --light:#f4f1eb; --white:#fff; --danger:#c0392b; --success:#1e7a4a;
  --warn:#d68910; --text:#2c2c2c; --muted:#888; --border:#e0ddd6;
  --shadow:0 4px 24px rgba(0,0,0,0.10); --shadow-lg:0 8px 40px rgba(0,0,0,0.18);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'DM Sans',sans-serif;background:var(--light);color:var(--text);min-height:100vh}

/* ===== LOGIN ===== */
#loginScreen{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:linear-gradient(135deg,#0f2540 0%,#1a3a5c 50%,#c8993a 100%);position:relative;overflow:hidden}
#loginScreen::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse at 30% 50%,rgba(200,153,58,0.15) 0%,transparent 60%)}
.login-box{background:white;border-radius:20px;padding:52px 44px;width:380px;
  box-shadow:var(--shadow-lg);text-align:center;position:relative;z-index:1}
.login-crest{width:72px;height:72px;background:var(--primary);border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin:0 auto 20px;
  font-size:30px;box-shadow:0 4px 16px rgba(26,58,92,0.3)}
.login-title{font-family:'Playfair Display',serif;color:var(--primary);font-size:20px;font-weight:700;line-height:1.3}
.login-sub{font-size:12px;color:var(--muted);margin:6px 0 32px;letter-spacing:.3px}
.login-box input{width:100%;padding:13px 16px;border:1.5px solid var(--border);border-radius:10px;
  font-size:14px;margin-bottom:13px;outline:none;font-family:'DM Sans',sans-serif;transition:border .2s}
.login-box input:focus{border-color:var(--primary)}
.btn-login{width:100%;padding:14px;background:var(--primary);color:white;border:none;
  border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;font-family:'DM Sans',sans-serif;
  transition:all .2s;letter-spacing:.3px}
.btn-login:hover{background:#0f2540;transform:translateY(-1px);box-shadow:0 4px 16px rgba(26,58,92,0.3)}
.login-error{color:var(--danger);font-size:13px;margin-top:12px;min-height:20px}
.login-switch{margin-top:16px;font-size:13px;color:var(--muted)}
.login-switch a{color:var(--primary);cursor:pointer;font-weight:600;text-decoration:none}
.login-switch a:hover{text-decoration:underline}

/* ===== APP ===== */
#app{display:none;min-height:100vh;flex-direction:column}
header{background:var(--primary);color:white;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  height:66px;box-shadow:0 2px 16px rgba(0,0,0,0.2);position:sticky;top:0;z-index:100}
.header-left{display:flex;align-items:center;gap:14px}
.header-logo{font-family:'Playfair Display',serif;font-size:16px;line-height:1.25}
.header-logo small{display:block;font-size:11px;font-family:'DM Sans',sans-serif;opacity:.65;font-weight:300}
.header-right{display:flex;align-items:center;gap:10px}
.badge-role{font-size:11px;font-weight:700;padding:4px 12px;border-radius:20px;letter-spacing:.5px}
.badge-superadmin{background:var(--accent);color:white}
.badge-user{background:rgba(255,255,255,0.2);color:white;border:1px solid rgba(255,255,255,0.3)}
.btn-logout{background:rgba(255,255,255,0.12);border:1px solid rgba(255,255,255,0.25);
  color:white;padding:7px 16px;border-radius:8px;font-size:13px;cursor:pointer;
  font-family:'DM Sans',sans-serif;transition:.2s}
.btn-logout:hover{background:rgba(255,255,255,0.22)}

/* ===== NAV ===== */
.nav-bar{background:white;border-bottom:1px solid var(--border);
  display:flex;padding:0 24px;gap:0;overflow-x:auto}
.nav-item{padding:14px 20px;font-size:14px;font-weight:500;cursor:pointer;
  color:var(--muted);border-bottom:3px solid transparent;white-space:nowrap;
  transition:.2s;font-family:'DM Sans',sans-serif;background:none;border-left:none;border-right:none;border-top:none}
.nav-item:hover{color:var(--primary)}
.nav-item.active{color:var(--primary);border-bottom-color:var(--accent);font-weight:700}

/* ===== MAIN ===== */
.main{max-width:1200px;margin:0 auto;padding:28px 16px;flex:1}

/* ===== STATS ===== */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:28px}
.stat-card{background:white;border-radius:14px;padding:20px 22px;
  box-shadow:var(--shadow);position:relative;overflow:hidden}
.stat-card::after{content:'';position:absolute;right:-10px;top:-10px;
  width:70px;height:70px;border-radius:50%;opacity:.08}
.stat-card.blue::after{background:var(--primary)}
.stat-card.gold::after{background:var(--accent)}
.stat-card.green::after{background:var(--success)}
.stat-card.red::after{background:var(--danger)}
.stat-icon{font-size:22px;margin-bottom:10px}
.stat-label{font-size:11px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.6px}
.stat-value{font-size:24px;font-weight:700;color:var(--primary);margin-top:4px;font-family:'Playfair Display',serif}

/* ===== SECTION ===== */
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.section-title{font-family:'Playfair Display',serif;font-size:20px;color:var(--primary)}
.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

/* ===== BUTTONS ===== */
.btn{padding:10px 20px;border:none;border-radius:9px;font-size:13px;font-weight:600;
  cursor:pointer;font-family:'DM Sans',sans-serif;transition:all .2s;
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn-primary{background:var(--primary);color:white}
.btn-primary:hover{background:#0f2540;transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:white}
.btn-accent:hover{background:#b8862e}
.btn-success{background:var(--success);color:white}
.btn-success:hover{background:#155c37}
.btn-danger{background:var(--danger);color:white}
.btn-danger:hover{background:#9b2c1f}
.btn-warn{background:var(--warn);color:white}
.btn-outline{background:transparent;border:1.5px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:white}
.btn-ghost{background:transparent;border:1.5px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:6px 12px;font-size:12px;border-radius:7px}
.btn-xs{padding:4px 9px;font-size:11px;border-radius:6px}

/* ===== TABLE ===== */
.table-wrap{background:white;border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
table{width:100%;border-collapse:collapse}
th{background:var(--primary);color:white;padding:13px 16px;text-align:left;font-size:12px;
  font-weight:700;letter-spacing:.4px;text-transform:uppercase}
td{padding:12px 16px;font-size:13px;border-bottom:1px solid #f0ede6;vertical-align:middle}
tr:last-child td{border-bottom:none}
tr:hover td{background:#faf8f4;cursor:pointer}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:700;letter-spacing:.3px}
.badge-paid{background:#d4edda;color:#155724}
.badge-partial{background:#fff3cd;color:#856404}
.badge-unpaid{background:#f8d7da;color:#721c24}
.badge-active{background:#d4edda;color:#155724}
.badge-inactive{background:#f8d7da;color:#721c24}

/* ===== SEARCH ===== */
.search-bar{padding:10px 16px;border:1.5px solid var(--border);border-radius:9px;
  font-size:13px;font-family:'DM Sans',sans-serif;outline:none;width:220px;transition:.2s}
.search-bar:focus{border-color:var(--primary);width:260px}

/* ===== FILTER TABS ===== */
.filter-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.filter-tab{padding:6px 16px;border-radius:20px;font-size:12px;font-weight:600;
  cursor:pointer;border:1.5px solid var(--border);background:white;color:var(--muted);
  font-family:'DM Sans',sans-serif;transition:.2s}
.filter-tab.active{background:var(--primary);color:white;border-color:var(--primary)}
.filter-tab:hover:not(.active){border-color:var(--primary);color:var(--primary)}

/* ===== MODAL ===== */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);
  z-index:1000;align-items:center;justify-content:center;padding:16px}
.modal-overlay.active{display:flex}
.modal{background:white;border-radius:18px;padding:36px 32px;width:100%;
  max-width:500px;box-shadow:var(--shadow-lg);max-height:92vh;overflow-y:auto}
.modal-lg{max-width:700px}
.modal-title{font-family:'Playfair Display',serif;font-size:21px;color:var(--primary);margin-bottom:24px}
.form-group{margin-bottom:18px}
label{display:block;font-size:12px;font-weight:700;color:var(--text);
  margin-bottom:6px;text-transform:uppercase;letter-spacing:.4px}
input[type=text],input[type=number],input[type=email],input[type=password],select,textarea{
  width:100%;padding:11px 14px;border:1.5px solid var(--border);
  border-radius:9px;font-size:14px;font-family:'DM Sans',sans-serif;
  outline:none;transition:.2s;background:white}
input:focus,select:focus,textarea:focus{border-color:var(--primary)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px;flex-wrap:wrap}
.auto-field{padding:11px 14px;background:#f8f6f1;border:1.5px solid #eee;
  border-radius:9px;font-size:14px;color:var(--text);font-weight:600}
.field-hint{font-size:11px;color:var(--muted);margin-top:4px}

/* ===== STUDENT DETAIL ===== */
.student-detail-header{display:flex;align-items:flex-start;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.student-avatar{width:64px;height:64px;background:var(--primary);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:white;
  font-size:26px;font-family:'Playfair Display',serif;font-weight:700;flex-shrink:0}
.student-detail-info h2{font-family:'Playfair Display',serif;font-size:22px;color:var(--primary)}
.student-detail-info p{font-size:13px;color:var(--muted);margin-top:4px}
.fee-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:24px}
.fee-box{background:var(--light);border-radius:12px;padding:16px;text-align:center}
.fee-box .label{font-size:11px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.4px}
.fee-box .amount{font-size:20px;font-weight:700;font-family:'Playfair Display',serif;margin-top:4px}
.fee-box.total .amount{color:var(--primary)}
.fee-box.paid .amount{color:var(--success)}
.fee-box.due .amount{color:var(--danger)}
.timeline{border-left:3px solid var(--accent);padding-left:20px;margin-top:8px}
.timeline-item{position:relative;margin-bottom:18px}
.timeline-item::before{content:'';position:absolute;left:-26px;top:8px;
  width:10px;height:10px;border-radius:50%;background:var(--accent);border:2px solid white;box-shadow:0 0 0 2px var(--accent)}
.timeline-date{font-size:11px;color:var(--muted);font-weight:600;margin-bottom:4px}
.timeline-card{background:white;border-radius:10px;padding:14px 16px;
  box-shadow:0 2px 10px rgba(0,0,0,0.07);border:1px solid var(--border)}
.timeline-card .amount{font-size:16px;font-weight:700;color:var(--success)}
.timeline-card .pending{font-size:13px;color:var(--danger);font-weight:600;margin-top:4px}

/* ===== CATEGORY CARDS ===== */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.category-card{background:white;border-radius:14px;padding:22px;box-shadow:var(--shadow);
  border-top:4px solid var(--accent);cursor:pointer;transition:.2s}
.category-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.category-card h3{font-family:'Playfair Display',serif;font-size:17px;color:var(--primary);margin-bottom:12px}
.cat-stat{display:flex;justify-content:space-between;font-size:13px;padding:4px 0;border-bottom:1px dashed #eee}
.cat-stat:last-child{border-bottom:none}
.cat-stat .k{color:var(--muted)}
.cat-stat .v{font-weight:700;color:var(--text)}

/* ===== SLIP ===== */
.slip-preview-box{border:2px solid var(--primary);border-radius:12px;padding:28px;
  max-width:420px;margin:0 auto;background:white}
.slip-header-area{text-align:center;border-bottom:2px solid var(--accent);padding-bottom:14px;margin-bottom:16px}
.slip-institute-name{font-family:'Playfair Display',serif;font-size:17px;color:var(--primary);font-weight:700;line-height:1.3}
.slip-sub{font-size:12px;color:var(--muted);margin-top:3px}
.slip-receipt-label{font-size:18px;font-weight:800;color:var(--accent);text-align:center;
  margin:10px 0 16px;letter-spacing:2px;font-family:'Playfair Display',serif}
.slip-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed #eee;font-size:13px}
.slip-row:last-child{border-bottom:none}
.slip-row .k{color:var(--muted)}
.slip-row .v{font-weight:600;color:var(--text)}
.slip-paid-box{background:var(--primary);color:white;border-radius:9px;
  padding:11px 16px;margin-top:14px;display:flex;justify-content:space-between;font-weight:700;font-size:15px}
.slip-pending-box{background:#fff3cd;border-radius:9px;padding:9px 16px;
  margin-top:8px;display:flex;justify-content:space-between;font-size:14px;font-weight:700;color:#856404}
.slip-footer-area{text-align:center;margin-top:16px}
.slip-stamp{border:2px solid var(--success);color:var(--success);display:inline-block;
  padding:4px 20px;border-radius:4px;font-weight:800;font-size:12px;
  letter-spacing:2px;transform:rotate(-6deg);margin-top:6px}
.slip-footer-text{font-size:10px;color:var(--muted);margin-top:10px}

/* ===== USERS ===== */
.user-card{background:white;border-radius:12px;padding:18px 20px;
  box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;
  gap:14px;flex-wrap:wrap;margin-bottom:12px}
.user-avatar{width:44px;height:44px;background:var(--primary-light);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:white;
  font-weight:700;font-size:18px;flex-shrink:0}
.user-info .name{font-weight:700;font-size:15px;color:var(--primary)}
.user-info .email{font-size:12px;color:var(--muted);margin-top:2px}
.user-actions{display:flex;gap:8px;flex-wrap:wrap}

/* ===== PROGRESS BAR ===== */
.progress-bar{height:8px;background:#eee;border-radius:10px;overflow:hidden;margin-top:8px}
.progress-fill{height:100%;border-radius:10px;background:linear-gradient(90deg,var(--success),var(--accent-light));transition:width .4s}

/* ===== EMPTY ===== */
.empty-state{text-align:center;padding:52px 24px;color:var(--muted)}
.empty-state .icon{font-size:52px;margin-bottom:14px;opacity:.6}
.empty-state p{font-size:14px}

/* ===== PRINT ===== */
#slipPrint{display:none}
@media print{
  body>*{display:none!important}
  #slipPrint{display:block!important;font-family:'DM Sans',sans-serif}
  .slip-preview-box{max-width:420px;margin:20px auto;border:2px solid #1a3a5c}
}

@media(max-width:600px){
  .form-row,.form-row-3{grid-template-columns:1fr}
  .modal{padding:24px 18px}
  .search-bar{width:160px}
  .search-bar:focus{width:200px}
  header{padding:0 14px}
  .header-logo{font-size:13px}
  .fee-overview{grid-template-columns:1fr}
  .main{padding:18px 12px}
}