:root{
  --blue:#1d4ed8;
  --blue-dark:#0f2f6e;
  --blue-soft:#eff6ff;
  --border:#dbe5f3;
  --text:#10233f;
  --muted:#66758f;
  --bg:#f4f7fb;
  --white:#fff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.btn-primary{background:var(--blue);border-color:var(--blue)}
.btn-primary:hover{background:#1742b5;border-color:#1742b5}

/* Admin login */
.admin-login-page{min-height:100vh;background:linear-gradient(135deg,#eef5ff 0%,#f8fafc 52%,#ffffff 100%)}
.admin-login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 16px}
.admin-login-card{width:min(1080px,100%);display:grid;grid-template-columns:1.1fr .9fr;background:var(--white);border:1px solid var(--border);border-radius:24px;overflow:hidden;box-shadow:0 18px 48px rgba(15,47,110,.12)}
.admin-login-info{position:relative;padding:48px;background:linear-gradient(135deg,#123b85,#2563eb);color:#fff;display:flex;flex-direction:column;justify-content:center;min-height:520px}
.admin-login-info:after{content:"";position:absolute;right:-80px;bottom:-80px;width:240px;height:240px;border-radius:999px;background:rgba(255,255,255,.12)}
.admin-home-link{position:absolute;top:24px;left:32px;color:#dbeafe;font-weight:600}
.admin-login-logo{width:56px;height:56px;border-radius:16px;background:#fff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:24px;margin-bottom:20px}
.admin-eyebrow{margin:0 0 8px;color:#bfdbfe;text-transform:uppercase;letter-spacing:.08em;font-size:13px;font-weight:700}
.admin-login-info h1{font-size:42px;line-height:1.08;margin:0 0 16px;font-weight:800;max-width:560px}
.admin-login-desc{font-size:17px;color:#eaf2ff;margin:0 0 28px;max-width:560px}
.admin-login-badges{display:flex;flex-wrap:wrap;gap:10px;max-width:560px}
.admin-login-badges span{display:inline-flex;border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.12);border-radius:999px;padding:8px 12px;color:#fff;font-size:14px}
.admin-login-formbox{padding:48px;display:flex;flex-direction:column;justify-content:center;background:#fff}
.form-title-block h2{font-size:30px;color:var(--blue-dark);margin:0 0 6px;font-weight:800}
.form-title-block p{margin:0 0 26px;color:var(--muted)}
.admin-login-form .form-label{font-weight:700;color:#243b5a}
.admin-login-form .form-control{border-color:#cfd9e8;border-radius:12px}
.admin-login-form .form-control:focus{border-color:#5b8def;box-shadow:0 0 0 .2rem rgba(29,78,216,.13)}
.password-field{position:relative}
.password-field .form-control{padding-right:74px}
.password-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:0;background:#edf4ff;color:var(--blue);font-weight:700;border-radius:9px;padding:7px 12px}
.admin-login-submit{border-radius:12px;font-weight:800;padding:12px 16px;margin-top:8px}
.admin-login-note{margin-top:22px;padding:12px 14px;background:#f8fafc;border:1px solid var(--border);border-radius:12px;color:var(--muted);font-size:14px}

/* Shared admin dashboard fallback styles */
.admin-shell{max-width:1180px;margin:0 auto;padding:24px;display:grid;grid-template-columns:260px 1fr;gap:24px}
.admin-sidebar,.admin-card,.admin-alert,.admin-stat-card{background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:0 8px 22px rgba(15,47,110,.05)}
.admin-sidebar{padding:18px;height:max-content;position:sticky;top:18px}
.admin-brand{display:flex;gap:12px;align-items:center;margin-bottom:18px}
.brand-avatar{width:42px;height:42px;border-radius:12px;background:var(--blue);color:white;display:flex;align-items:center;justify-content:center;font-weight:800}
.admin-brand small{display:block;color:var(--muted);font-size:12px}.admin-menu{display:grid;gap:7px}.admin-menu a{display:block;padding:10px 12px;border-radius:10px;color:#29405f;font-weight:700}.admin-menu a.active,.admin-menu a:hover{background:var(--blue-soft);color:var(--blue);text-decoration:none}.sidebar-note{margin-top:18px;font-size:13px;color:var(--muted);background:#f8fafc;border:1px solid var(--border);border-radius:12px;padding:12px}.admin-main{min-width:0}.admin-topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.eyebrow{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--blue);font-weight:800}.admin-topbar h1{margin:4px 0 0;font-size:30px;color:var(--blue-dark)}.admin-actions{display:flex;gap:10px;flex-wrap:wrap}.admin-alert{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;margin-bottom:16px}.admin-alert p{margin:4px 0 0;color:var(--muted)}.admin-alert span{font-size:28px}.admin-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}.admin-stat-card{padding:16px}.admin-stat-card .stat-icon{font-size:24px}.admin-stat-card small,.admin-stat-card em{display:block;color:var(--muted)}.admin-stat-card strong{display:block;font-size:28px;color:var(--blue-dark)}.admin-card{padding:20px}.admin-card h2{font-size:20px;margin:0 0 14px;color:var(--blue-dark)}.todo-list,.system-list{display:grid;gap:10px}.todo-list>div,.system-list>div{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid var(--border);border-radius:12px;background:#fbfdff}.todo-list span{width:28px;height:28px;background:var(--blue-soft);color:var(--blue);font-weight:800;border-radius:999px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.todo-list small{display:block;color:var(--muted)}.system-list>div{justify-content:space-between}.system-list span{color:var(--muted)}

@media (max-width: 900px){
  .admin-login-card{grid-template-columns:1fr}.admin-login-info{min-height:auto;padding:34px}.admin-login-formbox{padding:34px}.admin-login-info h1{font-size:32px}.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:static}.admin-stats-grid{grid-template-columns:repeat(2,1fr)}.admin-topbar{align-items:flex-start;flex-direction:column}
}
@media (max-width: 560px){
  .admin-login-wrap{padding:14px}.admin-login-card{border-radius:16px}.admin-login-info,.admin-login-formbox{padding:24px}.admin-home-link{position:static;margin-bottom:18px}.admin-login-info h1{font-size:28px}.admin-login-badges{display:grid}.admin-stats-grid{grid-template-columns:1fr}.admin-shell{padding:14px}.admin-actions .btn{width:100%}
}

/* Admin management pages v10 */
.admin-page-wrap{max-width:1180px;margin:0 auto;padding:28px 18px}.admin-page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}.admin-page-header h1{margin:3px 0 8px;color:var(--blue-dark);font-size:32px}.admin-page-header p{margin:0;color:var(--muted)}.admin-page-actions,.import-actions,.filter-actions,.bulk-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.admin-content-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-group{margin-bottom:14px}.form-group label,.student-filter-form label,.bulk-grid label{display:block;font-weight:700;color:#243b5a;margin-bottom:6px}.required{color:#dc2626}.form-control,.form-select{width:100%;border:1px solid #cfd9e8;border-radius:12px;padding:10px 12px;background:#fff;color:var(--text)}.form-text{font-size:13px;color:var(--muted);margin-top:5px}.filter-grid{display:grid;grid-template-columns:1fr 1fr auto;gap:14px;align-items:end}.bulk-grid{display:grid;grid-template-columns:1.2fr .6fr .9fr auto;gap:14px;align-items:end}.table-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.table-title-row h2{margin:0}.table-title-row span,.select-row{color:var(--muted);font-weight:700}.select-row{padding:8px 0 12px}.table-responsive{overflow:auto}.admin-table{width:100%;border-collapse:collapse}.admin-table th{background:#f8fbff;color:#243b5a;text-align:left;font-size:13px;border-bottom:1px solid var(--border);padding:10px}.admin-table td{border-bottom:1px solid var(--border);padding:10px;vertical-align:top}.status-pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 9px;background:#eef2f7;color:#475569;font-size:12px;font-weight:800}.status-pill.success{background:#e8f8ee;color:#166534}.status-pill.muted{background:#f1f5f9;color:#64748b}.btn-danger-soft{background:#fee2e2;color:#b91c1c;border:1px solid #fecaca}.btn-danger-soft:hover{background:#fecaca;color:#991b1b;text-decoration:none}.btn-sm{padding:6px 10px;border-radius:9px;font-size:13px}.action-cell{white-space:nowrap}.guide-note{border:1px solid var(--border);background:#fbfdff;border-radius:12px;padding:12px;margin-top:12px}.guide-note.muted{color:var(--muted)}.sample-table-wrap{overflow:auto}.sample-table{width:100%}.pagination-row{display:flex;gap:12px;align-items:center;justify-content:center;margin:18px 0}.check-line{display:flex;gap:8px;align-items:center;font-weight:700;margin:8px 0 18px}.form-card-narrow{max-width:880px}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mb-4{margin-bottom:1.5rem}.small{font-size:12px}.text-muted{color:var(--muted)}.text-success{color:#15803d}.text-danger{color:#b91c1c}.fw-semibold{font-weight:700}
@media(max-width:900px){.admin-page-header{flex-direction:column}.admin-content-grid,.form-grid-2,.filter-grid,.bulk-grid{grid-template-columns:1fr}.admin-page-actions .btn,.filter-actions .btn,.bulk-actions .btn{width:100%}}

/* Upload students page v11 */
.upload-hero{background:linear-gradient(135deg,#ffffff 0%,#f1f6ff 100%);border:1px solid var(--border);border-radius:22px;padding:22px 24px;box-shadow:0 12px 30px rgba(15,47,110,.06)}
.upload-hero h1{font-size:34px;margin-bottom:6px}.upload-hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.upload-hero-tags span{background:#eaf2ff;color:#1d4ed8;border:1px solid #cfe0ff;border-radius:999px;padding:6px 10px;font-size:13px;font-weight:800}.upload-card-pro{padding:24px}.card-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}.card-title-row h2{margin:0 0 4px}.card-title-row p{margin:0;color:var(--muted)}.import-stepper{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:6px 0 22px}.import-stepper div{display:flex;gap:9px;align-items:center;background:#f8fbff;border:1px solid var(--border);border-radius:14px;padding:10px 12px}.import-stepper span{width:26px;height:26px;border-radius:999px;background:#1d4ed8;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}.import-stepper strong{font-size:14px;color:#243b5a}.form-section-title{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:#1d4ed8;font-weight:900;margin:18px 0 10px;padding-top:12px;border-top:1px dashed #dbe5f3}.import-form .form-section-title:first-of-type{border-top:0;padding-top:0}.input-with-action{display:grid;grid-template-columns:1fr auto;gap:8px}.mini-btn{border:1px solid #cfe0ff;background:#eef6ff;color:#1d4ed8;border-radius:10px;padding:0 12px;font-weight:800;white-space:nowrap}.mini-btn:hover{background:#dbeafe}.auto-preview{margin:-2px 0 12px;padding:11px 13px;border:1px solid #bfdbfe;background:#eff6ff;color:#1742b5;border-radius:12px;font-weight:800}.file-drop-card{border:1px dashed #9db8ee;background:#f8fbff;border-radius:16px;padding:14px}.file-drop-card input[type=file]{background:#fff}.btn-import-main{padding:11px 18px;border-radius:12px;font-weight:900}.guide-card-pro{position:sticky;top:18px;height:max-content}.guide-example{display:grid;gap:9px;background:#f8fbff;border:1px solid var(--border);border-radius:14px;padding:12px;margin:12px 0}.guide-example div{display:flex;justify-content:space-between;gap:14px;align-items:center;border-bottom:1px dashed #dbe5f3;padding-bottom:8px}.guide-example div:last-child{border-bottom:0;padding-bottom:0}.guide-example small{color:var(--muted);font-weight:800}.guide-example strong{text-align:right;color:#0f2f6e}
@media(max-width:900px){.upload-hero{padding:18px}.import-stepper{grid-template-columns:1fr}.input-with-action{grid-template-columns:1fr}.mini-btn{height:42px}.guide-card-pro{position:static}.guide-example div{align-items:flex-start;flex-direction:column}.guide-example strong{text-align:left}}

/* v13 upload page primarily uses embedded CSS in admin/upload_students.php to avoid cache/load issues. */

/* v14 admin pages refinements */
body{background:#f5f8fc;color:#14213d;font-family:Arial,Helvetica,sans-serif}.admin-page-wrap{max-width:1320px;margin:0 auto;padding:22px 18px}.admin-page-header{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:16px}.admin-page-header h1{font-size:34px;line-height:1.12;color:#0f2f6e;font-weight:800;margin:4px 0 8px}.admin-page-header p{color:#66758f;margin:0}.admin-page-actions{display:flex;gap:10px;flex-wrap:wrap}.admin-card{background:#fff;border:1px solid #dbe5f3;border-radius:18px;padding:18px;box-shadow:0 10px 26px rgba(15,47,110,.05);margin-bottom:16px}.admin-card h2{font-size:20px;color:#0f2f6e;font-weight:800}.form-control,.form-select{border:1px solid #cfd9e8;border-radius:12px;padding:11px 12px;background:#fff;color:#10233f}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.filter-grid{display:grid;grid-template-columns:minmax(280px,1fr) auto;gap:14px;align-items:end}.bulk-grid{display:grid;grid-template-columns:1.2fr .65fr 1fr auto;gap:14px;align-items:end}.admin-table{width:100%;border-collapse:separate;border-spacing:0}.admin-table th{background:#f8fbff;color:#243b5a;font-size:13px;text-align:left;border-bottom:1px solid #dbe5f3;padding:11px 10px;white-space:nowrap}.admin-table td{border-bottom:1px solid #e6edf7;padding:10px;vertical-align:middle}.admin-table tbody tr:hover{background:#fbfdff}.status-pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 9px;background:#f1f5f9;color:#64748b;font-size:12px;font-weight:800}.status-pill.success{background:#e8f8ee;color:#166534}.status-pill.muted{background:#f1f5f9;color:#64748b}.table-title-row{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}.table-responsive{overflow:auto}.btn{border-radius:12px;font-weight:700}.btn-sm{padding:6px 10px;border-radius:9px;font-size:13px}@media(max-width:980px){.admin-page-header{flex-direction:column}.form-grid-2,.filter-grid,.bulk-grid{grid-template-columns:1fr}}

/* v15 unified admin template */
body{background:#f5f8fc;color:#10233f;font-family:"Segoe UI",Roboto,Arial,Helvetica,sans-serif;font-size:15px}
.admin-template-v15{width:100%;max-width:1440px;margin:0 auto;padding:22px 28px;display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px}
.admin-template-v15 .admin-sidebar{background:#fff;border:1px solid #dbe5f3;border-radius:18px;box-shadow:0 10px 26px rgba(15,47,110,.055);padding:16px;height:max-content;position:sticky;top:18px}
.admin-template-v15 .admin-brand{display:flex;gap:10px;align-items:center;padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid #e7eef9}
.admin-template-v15 .brand-avatar{width:40px;height:40px;flex:0 0 40px;border-radius:12px;background:#1d4ed8;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.admin-template-v15 .admin-brand strong{display:block;color:#0f2f6e;font-size:15px;line-height:1.2}.admin-template-v15 .admin-brand small{display:block;color:#64748b;font-size:12px}.admin-template-v15 .admin-menu{display:grid;gap:7px}.admin-template-v15 .admin-menu a{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:12px;color:#29405f;font-weight:700;text-decoration:none}.admin-template-v15 .admin-menu a.active,.admin-template-v15 .admin-menu a:hover{background:#eaf2ff;color:#1d4ed8}.admin-template-v15 .sidebar-note{margin-top:16px;background:#f8fbff;border:1px solid #dbe5f3;border-radius:14px;padding:12px;color:#64748b;font-size:13px;line-height:1.45}.admin-template-v15 .admin-main{min-width:0}.admin-template-v15 .admin-topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}.admin-template-v15 .eyebrow{display:block;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#1d4ed8;font-weight:800;margin-bottom:4px}.admin-template-v15 .admin-topbar h1{font-size:34px;line-height:1.12;margin:0 0 6px;color:#0f2f6e;font-weight:800}.admin-template-v15 .admin-topbar p{margin:0;color:#66758f;max-width:780px}.admin-template-v15 .admin-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.admin-template-v15 .btn{border-radius:12px;font-weight:700;text-decoration:none}.btn-outline{border:1px solid #cfe0ff;color:#1d4ed8;background:#fff}.btn-outline:hover{background:#eef6ff}.btn-light{background:#fff;border:1px solid #dbe5f3;color:#24405f}.btn-light:hover{background:#f8fbff;color:#1d4ed8}.admin-card,.admin-alert,.admin-hero,.admin-stat-card{background:#fff;border:1px solid #dbe5f3;border-radius:18px;box-shadow:0 10px 26px rgba(15,47,110,.05)}.admin-card{padding:18px;margin-bottom:16px}.admin-card h2{font-size:20px;line-height:1.25;color:#0f2f6e;font-weight:800;margin:0 0 12px}.admin-alert{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px;margin-bottom:18px}.admin-alert p{margin:4px 0 0;color:#66758f}.admin-hero{padding:22px 24px;margin-bottom:18px;background:linear-gradient(135deg,#fff 0%,#f1f6ff 100%)}.admin-hero h1{font-size:28px;line-height:1.2;color:#0f2f6e;margin:4px 0 8px;font-weight:800}.admin-hero p{margin:0;color:#66758f}.hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.hero-tags span{background:#eaf2ff;color:#1d4ed8;border:1px solid #cfe0ff;border-radius:999px;padding:6px 10px;font-size:13px;font-weight:800}.admin-stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px}.admin-stat-card{padding:16px}.admin-stat-card .stat-icon{font-size:24px}.admin-stat-card small,.admin-stat-card em{display:block;color:#66758f}.admin-stat-card strong{display:block;font-size:28px;color:#0f2f6e}.admin-grid-2{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);gap:18px}.quick-admin-links{display:grid;gap:10px}.quick-admin-links a{display:block;padding:12px;border:1px solid #dbe5f3;border-radius:12px;background:#fbfdff;font-weight:700;text-decoration:none}.todo-list{display:grid;gap:10px}.todo-list>div{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid #dbe5f3;border-radius:12px;background:#fbfdff}.todo-list span{width:28px;height:28px;background:#eaf2ff;color:#1d4ed8;font-weight:800;border-radius:999px;display:flex;align-items:center;justify-content:center;flex:0 0 auto}.todo-list small{display:block;color:#66758f}.alert{border-radius:14px;padding:12px 14px;margin-bottom:16px}.alert-danger{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239}.alert-success{background:#ecfdf3;border:1px solid #bbf7d0;color:#166534}.alert-warning{background:#fffbeb;border:1px solid #fde68a;color:#92400e}.form-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.form-group{margin-bottom:14px}.form-group label,.student-filter-form label,.bulk-grid label{display:block;font-weight:700;color:#243b5a;margin-bottom:6px}.required{color:#dc2626}.form-control,.form-select{width:100%;border:1px solid #cfd9e8;border-radius:12px;padding:11px 12px;background:#fff;color:#10233f;min-height:44px}.form-control:focus,.form-select:focus{outline:none;border-color:#6ea0f4;box-shadow:0 0 0 3px rgba(29,78,216,.12)}.form-text{font-size:13px;color:#66758f;margin-top:6px}.filter-grid{display:grid;grid-template-columns:minmax(280px,420px) minmax(260px,1fr) auto;gap:14px;align-items:end}.bulk-grid{display:grid;grid-template-columns:1.2fr .65fr 1fr auto;gap:14px;align-items:end}.table-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.table-title-row h2{margin:0}.table-responsive{overflow:auto}.admin-table{width:100%;border-collapse:separate;border-spacing:0}.admin-table th{background:#f8fbff;color:#243b5a;font-size:13px;text-align:left;border-bottom:1px solid #dbe5f3;padding:11px 10px;white-space:nowrap}.admin-table td{border-bottom:1px solid #e6edf7;padding:10px;vertical-align:middle}.admin-table tbody tr:hover{background:#fbfdff}.status-pill{display:inline-flex;align-items:center;border-radius:999px;padding:4px 9px;background:#f1f5f9;color:#64748b;font-size:12px;font-weight:800;white-space:nowrap}.status-pill.success{background:#e8f8ee;color:#166534}.status-pill.muted{background:#f1f5f9;color:#64748b}.btn-danger-soft{background:#fee2e2;color:#b91c1c;border:1px solid #fecaca}.btn-danger-soft:hover{background:#fecaca;color:#991b1b;text-decoration:none}.btn-sm{padding:6px 10px;border-radius:9px;font-size:13px}.action-cell{white-space:nowrap}.pagination-row{display:flex;gap:12px;align-items:center;justify-content:center;margin:16px 0}.check-line{display:flex;gap:8px;align-items:center;font-weight:700;margin:8px 0 18px}.form-card-narrow{max-width:960px}.text-muted,.muted{color:#66758f}.text-success{color:#15803d}.text-danger{color:#b91c1c}.fw-semibold{font-weight:700}.small{font-size:12px}.layout-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}.card-head h2{margin:0 0 4px}.card-head p{margin:0;color:#66758f}.stepper{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:6px 0 22px}.stepper div{display:flex;gap:9px;align-items:center;background:#f8fbff;border:1px solid #dbe5f3;border-radius:14px;padding:10px 12px}.stepper span{width:26px;height:26px;border-radius:999px;background:#1d4ed8;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}.stepper strong{font-size:14px;color:#243b5a}.section-label{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:#1d4ed8;font-weight:900;margin:18px 0 10px;padding-top:12px;border-top:1px dashed #dbe5f3}.section-label.first{border-top:0;padding-top:0}.input-with-action{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px}.mini-btn{border:1px solid #cfe0ff;background:#eef6ff;color:#1d4ed8;border-radius:10px;padding:0 12px;font-weight:800;white-space:nowrap}.auto-preview{margin:-2px 0 12px;padding:11px 13px;border:1px solid #bfdbfe;background:#eff6ff;color:#1742b5;border-radius:12px;font-weight:800}.file-box{border:1px dashed #9db8ee;background:#f8fbff;border-radius:16px;padding:14px}.form-actions,.import-actions,.filter-actions,.bulk-actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.guide-example{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;background:#f8fbff;border:1px solid #dbe5f3;border-radius:14px;padding:12px;margin:12px 0}.guide-example div{display:grid;gap:4px}.guide-example small{color:#66758f;font-weight:800}.guide-example strong{color:#0f2f6e}.guide-note-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.guide-note{border:1px solid #dbe5f3;background:#fbfdff;border-radius:12px;padding:12px;color:#40536f}.history-card{margin-top:2px}.class-label{max-width:420px;white-space:normal;color:#243b5a}
@media(max-width:1100px){.admin-template-v15{grid-template-columns:1fr;padding:16px}.admin-template-v15 .admin-sidebar{position:static}.admin-template-v15 .admin-topbar{flex-direction:column}.admin-template-v15 .admin-actions{justify-content:flex-start}.admin-stats-grid{grid-template-columns:repeat(2,1fr)}.admin-grid-2,.form-grid-2,.filter-grid,.bulk-grid,.guide-example,.guide-note-wrap{grid-template-columns:1fr}.stepper{grid-template-columns:1fr}.input-with-action{grid-template-columns:1fr}.mini-btn{height:42px}}
@media(max-width:600px){.admin-template-v15{padding:12px}.admin-template-v15 .admin-topbar h1{font-size:27px}.admin-stats-grid{grid-template-columns:1fr}.admin-alert{flex-direction:column;align-items:flex-start}.admin-actions .btn,.form-actions .btn{width:100%;text-align:center}}

/* v16: unified, readable admin tables */
.admin-table-wrap,
.table-responsive{
  width:100%;
  overflow-x:auto;
  border:1px solid #dbe5f3;
  border-radius:16px;
  background:#fff;
}
.admin-table{
  width:100%;
  min-width:860px;
  border-collapse:separate;
  border-spacing:0;
  font-size:14px;
  line-height:1.45;
}
.admin-table thead th{
  position:sticky;
  top:0;
  z-index:1;
  background:#f5f8ff;
  color:#28415f;
  font-weight:800;
  font-size:13px;
  letter-spacing:.01em;
  text-align:left;
  border-bottom:1px solid #d7e2f1;
  padding:12px 14px;
  white-space:nowrap;
}
.admin-table tbody td{
  padding:12px 14px;
  border-bottom:1px solid #e8eef7;
  vertical-align:middle;
  color:#18314f;
  background:#fff;
}
.admin-table tbody tr:nth-child(even) td{background:#fbfdff;}
.admin-table tbody tr:hover td{background:#f2f7ff;}
.admin-table tbody tr:last-child td{border-bottom:0;}
.admin-table td:first-child,
.admin-table th:first-child{width:42px;text-align:center;}
.admin-table .w-mssv{width:120px;}
.admin-table .w-actions{width:110px;text-align:right;}
.admin-table td strong{font-weight:800;color:#0f2f6e;white-space:nowrap;}
.admin-table .status-pill{white-space:nowrap;}
.admin-table .text-muted,
.admin-table .small{font-size:12px;line-height:1.35;}
.table-tools{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  padding:8px 0 12px;
}
.table-tools label{display:flex;align-items:center;gap:7px;}
.table-title-row{align-items:flex-end;}
.table-title-row .muted{font-size:14px;}
.action-cell,
.admin-table td:last-child{white-space:nowrap;}

/* students page: avoid visual clutter after hiding class column */
.students-list-table{min-width:780px;}
.students-list-table th:nth-child(2),
.students-list-table td:nth-child(2){width:125px;}
.students-list-table th:nth-child(3),
.students-list-table td:nth-child(3){min-width:210px;}
.students-list-table th:nth-child(4),
.students-list-table td:nth-child(4){width:90px;}
.students-list-table th:nth-child(5),
.students-list-table td:nth-child(5){min-width:170px;}
.students-list-table th:nth-child(6),
.students-list-table td:nth-child(6){width:120px;}
.students-list-table th:nth-child(7),
.students-list-table td:nth-child(7){width:150px;}
.students-list-table th:nth-child(8),
.students-list-table td:nth-child(8){width:96px;text-align:right;}
@media(max-width:760px){
  .admin-table{min-width:760px;font-size:13px;}
  .admin-table thead th,.admin-table tbody td{padding:10px 11px;}
}

/* v17 public lookup template + student score table */
.site-container{width:min(1180px,calc(100% - 32px));margin:0 auto}.site-header.public-header{background:rgba(255,255,255,.96);border-bottom:1px solid #dbe5f3;position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}.site-brand{display:flex;align-items:center;gap:12px;color:#10233f;text-decoration:none}.site-brand:hover{text-decoration:none}.brand-mark{width:42px;height:42px;border-radius:14px;background:#1d4ed8;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:20px;box-shadow:0 8px 18px rgba(29,78,216,.18)}.site-brand strong{display:block;color:#0f2f6e;font-weight:900;line-height:1.2}.site-brand small{display:block;color:#66758f;font-size:12px}.site-menu{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.site-menu a{display:inline-flex;align-items:center;padding:8px 11px;border-radius:999px;color:#29405f;font-weight:800;font-size:14px;text-decoration:none}.site-menu a:hover,.site-menu a.active{background:#eaf2ff;color:#1d4ed8;text-decoration:none}.site-menu .admin-link{background:#0f2f6e;color:#fff}.nav-toggle{display:none;border:0;background:#eaf2ff;border-radius:12px;padding:8px;width:42px;height:38px}.nav-toggle span{display:block;height:2px;background:#1d4ed8;margin:5px 4px;border-radius:99px}.public-main{padding-bottom:42px}.hero-section{background:radial-gradient(circle at 20% 10%,#dbeafe 0,#eff6ff 28%,#f5f8fc 70%);padding:42px 0}.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:24px;align-items:center}.hero-content-card,.hero-side-card,.feature-card,.content-card,.student-summary-card,.score-sheet-card,.empty-state-card,.auth-card{background:#fff;border:1px solid #dbe5f3;border-radius:24px;box-shadow:0 16px 38px rgba(15,47,110,.07)}.hero-content-card{padding:34px}.section-kicker{display:inline-block;text-transform:uppercase;letter-spacing:.12em;color:#1d4ed8;font-weight:900;font-size:12px;margin-bottom:8px}.hero-content-card h1{font-size:44px;line-height:1.05;margin:0 0 12px;color:#0f2f6e;font-weight:900}.hero-desc{font-size:17px;color:#40536f;margin:0 0 22px;max-width:720px}.lookup-card{background:#f8fbff;border:1px solid #cfe0ff;border-radius:18px;padding:16px;margin:16px 0}.lookup-card label{display:block;font-weight:900;color:#243b5a;margin-bottom:8px}.lookup-input-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.lookup-input-row input{min-height:48px;border:1px solid #c7d8ef;border-radius:14px;padding:12px 14px;font-size:16px;color:#10233f;background:#fff}.lookup-input-row input:focus{outline:none;border-color:#6ea0f4;box-shadow:0 0 0 3px rgba(29,78,216,.12)}.lookup-hint,.muted-note{color:#66758f;font-size:14px;margin:8px 0 0}.primary-button,.secondary-button{display:inline-flex;align-items:center;justify-content:center;border-radius:14px;font-weight:900;text-decoration:none;border:1px solid transparent;padding:11px 16px;min-height:44px;cursor:pointer}.primary-button{background:#1d4ed8;color:#fff}.primary-button:hover{background:#1742b5;color:#fff;text-decoration:none}.secondary-button{background:#fff;border-color:#cfe0ff;color:#1d4ed8}.secondary-button:hover{background:#eef6ff;text-decoration:none}.primary-button.full,.secondary-button.full{width:100%}.public-alert{border-radius:14px;padding:12px 14px;margin:12px 0;font-weight:700}.public-alert.error{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239}.public-alert.warning{background:#fffbeb;border:1px solid #fde68a;color:#92400e}.public-alert.info{background:#eff6ff;border:1px solid #bfdbfe;color:#1742b5}.public-alert.success{background:#ecfdf3;border:1px solid #bbf7d0;color:#166534}.lookup-status-card{display:flex;gap:13px;border-radius:18px;padding:15px;border:1px solid #dbe5f3;background:#fbfdff;margin:15px 0}.lookup-status-card.success{border-color:#bbf7d0;background:#f0fdf4}.lookup-status-card.warning{border-color:#fde68a;background:#fffbeb}.lookup-status-card strong{display:block;color:#0f2f6e}.lookup-status-card p{margin:4px 0 10px;color:#40536f}.status-icon{width:36px;height:36px;border-radius:14px;background:#fff;display:flex;align-items:center;justify-content:center}.lookup-actions{display:flex;gap:10px;flex-wrap:wrap}.security-note{display:flex;gap:10px;align-items:flex-start;background:#f8fafc;border:1px solid #e2e8f0;border-radius:16px;padding:12px;color:#40536f}.security-note p{margin:0}.compact-note{margin:16px 0}.hero-side-card{padding:20px;background:linear-gradient(135deg,#fff,#f1f6ff)}.score-preview-card{background:#0f2f6e;color:#fff;border-radius:22px;padding:18px;box-shadow:0 18px 36px rgba(15,47,110,.18)}.preview-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.preview-head span{width:40px;height:40px;border-radius:14px;background:rgba(255,255,255,.16);display:flex;align-items:center;justify-content:center}.preview-head strong{display:block}.preview-head small{display:block;color:#bfdbfe}.preview-line{display:flex;align-items:center;justify-content:space-between;border-top:1px solid rgba(255,255,255,.16);padding:10px 0;color:#dbeafe}.preview-line strong{color:#fff}.preview-line.total{font-size:18px}.hero-mini-steps{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.hero-mini-steps div{display:flex;gap:9px;align-items:center;background:#fff;border:1px solid #dbe5f3;border-radius:14px;padding:10px}.hero-mini-steps span{width:28px;height:28px;border-radius:999px;background:#eaf2ff;color:#1d4ed8;display:flex;align-items:center;justify-content:center;font-weight:900}.hero-mini-steps strong{font-size:13px;color:#243b5a}.feature-section{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px;margin-bottom:22px}.feature-card{padding:18px}.feature-icon{width:38px;height:38px;border-radius:14px;background:#eaf2ff;color:#1d4ed8;font-weight:900;display:flex;align-items:center;justify-content:center;margin-bottom:10px}.feature-card h3{font-size:18px;color:#0f2f6e;font-weight:900;margin:0 0 8px}.feature-card p{color:#66758f;margin:0}.public-info-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr);gap:18px;margin-bottom:28px}.content-card{padding:22px}.card-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:14px}.card-title-row h2{margin:0 0 4px;color:#0f2f6e;font-weight:900}.public-check-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.public-check-list li{position:relative;padding-left:28px;color:#40536f}.public-check-list li:before{content:'✓';position:absolute;left:0;top:0;width:20px;height:20px;border-radius:999px;background:#e8f8ee;color:#166534;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:12px}.site-footer{border-top:1px solid #dbe5f3;background:#fff;padding:24px 0;color:#66758f}.footer-inner{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.footer-inner strong{color:#0f2f6e}.footer-inner p{margin:4px 0 0}.auth-page.public-auth-page{min-height:calc(100vh - 72px);display:flex;align-items:center;justify-content:center;padding:28px 16px}.auth-page.public-auth-page.wide{align-items:flex-start}.auth-card{width:min(560px,100%);padding:26px}.auth-card.link-card{width:min(820px,100%)}.auth-icon{font-size:38px;margin-bottom:8px}.auth-card h1{font-size:30px;color:#0f2f6e;font-weight:900;margin:0 0 8px}.auth-card p{color:#40536f}.link-form-grid,.form-grid.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-alert.error{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239;border-radius:14px;padding:12px 14px}.text-link{display:inline-block;margin-top:12px}.public-score-page{padding:24px 0 40px}.public-student-card{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;padding:24px;margin-bottom:18px}.public-student-card h1{font-size:32px;color:#0f2f6e;font-weight:900;margin:0 0 8px}.summary-badge{background:#e8f8ee;color:#166534;border-radius:999px;padding:8px 12px;font-weight:900;white-space:nowrap}.student-class-tags{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}.student-class-tags span{border:1px solid #cfe0ff;background:#eef6ff;color:#1742b5;border-radius:999px;padding:5px 10px;font-weight:800;font-size:13px}.public-score-card{padding:22px;margin-bottom:18px}.score-card-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:16px}.score-card-head h2{font-size:24px;color:#0f2f6e;font-weight:900;margin:0 0 6px}.final-score-stack{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}.final-score-box{min-width:110px;text-align:center;background:#0f2f6e;color:#fff;border-radius:18px;padding:12px 14px}.final-score-box small{display:block;color:#bfdbfe;font-weight:800;max-width:180px}.final-score-box strong{display:block;font-size:28px;line-height:1.1}.public-table-wrap{border:1px solid #dbe5f3;border-radius:16px;overflow:auto;background:#fff}.public-score-table{width:100%;min-width:720px;border-collapse:separate;border-spacing:0}.public-score-table th{background:#f5f8ff;color:#28415f;font-size:13px;font-weight:900;text-align:left;border-bottom:1px solid #d7e2f1;padding:12px 14px;white-space:nowrap}.public-score-table td{padding:12px 14px;border-bottom:1px solid #e8eef7;vertical-align:middle;background:#fff;color:#18314f}.public-score-table tr:nth-child(even) td{background:#fbfdff}.public-score-table tr:last-child td{border-bottom:0}.public-score-table td:first-child,.public-score-table th:first-child{text-align:center}.public-score-table td strong{color:#0f2f6e}.public-score-table .status-pill{margin-left:8px;vertical-align:middle}.score-cell-value{font-weight:900;color:#0f2f6e;font-size:16px;white-space:nowrap}.score-note-cell{color:#40536f}.is-final-row td{background:#f0f7ff!important}.is-final-row .score-cell-value{font-size:18px}.score-footnote{margin-top:10px}.compact-score-table{min-width:520px}.public-empty-card{text-align:center;padding:34px}.legacy-score-list{display:grid;gap:10px}.score-group-item{border:1px solid #dbe5f3;border-radius:16px;background:#fbfdff;padding:12px}.score-group-item summary{display:flex;align-items:center;justify-content:space-between;gap:14px;cursor:pointer;font-weight:900;color:#0f2f6e}.score-comment{color:#40536f;margin:10px 0}.force-show{display:flex!important}
@media(max-width:980px){.hero-grid,.public-info-grid{grid-template-columns:1fr}.feature-section{grid-template-columns:repeat(2,minmax(0,1fr))}.score-card-head,.public-student-card,.footer-inner{flex-direction:column}.final-score-stack{justify-content:flex-start}.hero-content-card h1{font-size:36px}}
@media(max-width:720px){.site-container{width:min(100% - 24px,1180px)}.header-inner{min-height:64px}.nav-toggle{display:block}.site-menu{display:none;width:100%;padding:0 0 12px}.site-menu.is-open{display:flex}.header-inner{flex-wrap:wrap}.lookup-input-row{grid-template-columns:1fr}.lookup-input-row .primary-button{width:100%}.feature-section{grid-template-columns:1fr}.hero-section{padding:24px 0}.hero-content-card,.hero-side-card,.content-card,.public-score-card,.public-student-card{border-radius:18px;padding:18px}.hero-content-card h1{font-size:32px}.hero-mini-steps,.link-form-grid,.form-grid.two{grid-template-columns:1fr}.auth-card{padding:20px}.public-score-table{min-width:640px}.primary-button,.secondary-button{width:100%}.lookup-actions .primary-button,.lookup-actions .secondary-button{width:auto}}


/* =========================================================
   Admin wide layout + large table usability
   ========================================================= */
@media (min-width:1101px){
  .admin-template-v15{
    width:100%;
    max-width:none;
    margin:0;
    padding:18px 22px;
    grid-template-columns:220px minmax(0,1fr);
    gap:18px;
  }
  .admin-template-v15 .admin-sidebar{
    top:14px;
    max-height:calc(100vh - 28px);
    overflow:auto;
  }
  .admin-template-v15 .admin-main{
    width:100%;
    min-width:0;
  }
  .admin-template-v15 .admin-topbar{
    padding-right:4px;
  }
  .admin-template-v15 .admin-card,
  .admin-template-v15 .admin-hero,
  .admin-template-v15 .edit-panel,
  .admin-template-v15 .add-row-panel,
  .admin-template-v15 .sheet-hero{
    width:100%;
  }
  .admin-template-v15 .table-responsive,
  .admin-template-v15 .score-edit-table-wrap{
    width:100%;
    max-width:100%;
    overflow:auto;
  }
  .admin-template-v15 .admin-table th,
  .admin-template-v15 .admin-table td{
    white-space:nowrap;
  }
  .admin-template-v15 .admin-table td.wrap,
  .admin-template-v15 .admin-table .class-label,
  .admin-template-v15 .admin-table .text-wrap{
    white-space:normal;
  }
}
@media (min-width:1500px){
  .admin-template-v15{
    grid-template-columns:230px minmax(0,1fr);
    padding-left:26px;
    padding-right:26px;
  }
}
@media (max-width:1100px){
  .admin-template-v15 .admin-table th,
  .admin-template-v15 .admin-table td{
    white-space:nowrap;
  }
}
.btn-success{
  background:#16a34a;
  border:1px solid #15803d;
  color:#fff;
}
.btn-success:hover,
.btn-success:focus{
  background:#15803d;
  border-color:#166534;
  color:#fff;
  text-decoration:none;
}

/* RBAC admin role badge */
.sidebar-role-badge{display:flex;gap:10px;align-items:center;margin:12px 14px 14px;padding:12px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.10);border-radius:16px;color:#eaf3ff}
.sidebar-role-badge>span{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.16)}
.sidebar-role-badge strong{display:block;font-size:13px;line-height:1.2;color:#fff}
.sidebar-role-badge small{display:block;margin-top:2px;font-size:11px;color:#d8e8ff}
.permission-alert{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:18px;padding:14px 16px;margin-bottom:16px;font-weight:700}
.permission-alert strong{display:block;color:#7c2d12;margin-bottom:4px}
.admin-template-v15 .sidebar-role-badge{background:linear-gradient(135deg,#eff6ff,#f8fbff);border:1px solid #cfe0ff;color:#17396f;box-shadow:0 8px 20px rgba(29,78,216,.07)}
.admin-template-v15 .sidebar-role-badge>span{background:#1d4ed8;color:#fff}
.admin-template-v15 .sidebar-role-badge strong{color:#0f2f6e}
.admin-template-v15 .sidebar-role-badge small{color:#52647e}


/* Admin teacher/course management + simplified score upload */
.admin-manage-grid{align-items:start}
.form-vertical{display:grid;gap:14px}
.form-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.score-meta-grid .form-group{min-width:0}
.todo-list.compact{gap:10px}
.todo-list.compact>div{padding:10px 0}
.admin-table .text-wrap{white-space:normal;min-width:220px}
.table-tools input.form-control{min-width:240px;min-height:40px}
.admin-card .muted strong{color:#0f2f6e}
.file-box input[type=file]{padding:10px;background:#fff}
@media(max-width:980px){.form-grid-3{grid-template-columns:1fr}.table-tools{width:100%}.table-tools input.form-control{min-width:0;width:100%}}