/* ============================================================
   Superclass — Descriptive Test Series (no navbar)
   ============================================================ */

:root{
  --bg:#F5F7FA;
  --surface:#FFFFFF;
  --border:#E4E9F0;
  --border-soft:#EDF1F5;
  --text:#101828;
  --text-soft:#3A4453;
  --muted:#67748A;
  --faint:#98A4B5;
  --primary:#0891B2;
  --primary-dark:#0A6E85;
  --primary-soft:#E5F8FB;
  --primary-soft-border:#BFEBF2;
  --success:#0F9D63;
  --success-soft:#E7F8EF;
  --warning:#D97706;
  --warning-soft:#FFF6E6;
  --danger:#DC2626;
  --danger-soft:#FDECEC;
  --locked:#8996A9;
  --locked-soft:#EEF1F5;
  --radius-s:8px;
  --radius-m:12px;
  --radius-l:18px;
  --shadow-1: 0 1px 2px rgba(16,24,40,0.04), 0 1px 3px rgba(16,24,40,0.05);
  --shadow-2: 0 4px 14px rgba(16,24,40,0.08);
  font-family:'Inter',sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);}
body{-webkit-font-smoothing:antialiased;}
h1,h2,h3,h4{font-family:'Manrope',sans-serif;color:var(--text);margin:0;letter-spacing:-0.01em;}
p{margin:0;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
.num{font-family:'JetBrains Mono',monospace;font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:-0.02em;}

.app{min-height:100vh;display:flex;flex-direction:column;}
.container{max-width:1160px;margin:0 auto;padding:0 24px;width:100%;}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:10px;font-weight:700;font-size:14px;padding:10px 18px;border:1px solid transparent;transition:.15s;white-space:nowrap;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);}
.btn-primary:disabled{background:#B9C2CE;cursor:not-allowed;}
.btn-outline{background:var(--surface);color:var(--text-soft);border-color:var(--border);}
.btn-outline:hover{border-color:var(--primary);color:var(--primary-dark);}
.btn-ghost{background:transparent;color:var(--text-soft);}
.btn-ghost:hover{background:var(--bg);}
.btn-danger-outline{background:var(--surface);color:var(--danger);border-color:#F4C6C6;}
.btn-danger-outline:hover{background:var(--danger-soft);}
.btn-sm{padding:7px 13px;font-size:13px;border-radius:8px;}
.btn-block{width:100%;}

/* BREADCRUMB */
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:6px;font-size:13.5px;color:var(--muted);margin-bottom:18px;}
.breadcrumb a{color:var(--muted);font-weight:600;}
.breadcrumb a:hover{color:var(--primary-dark);}
.breadcrumb .sep{color:var(--faint);}
.breadcrumb .current{color:var(--text);font-weight:700;}

/* PAGE HEAD */
.page-head{padding:36px 0 26px;}
.page-head h1{font-size:30px;}
.page-head p{color:var(--muted);font-size:15.5px;margin-top:7px;max-width:620px;line-height:1.5;}

/* CARDS */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-m);box-shadow:var(--shadow-1);}
.grid{display:grid;gap:18px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:960px){.grid-4{grid-template-columns:repeat(2,1fr);} .grid-3{grid-template-columns:repeat(2,1fr);}}
@media(max-width:640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}}

/* BADGES / STATUS */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;padding:4px 9px;border-radius:99px;border:1px solid transparent;}
.badge-green{background:var(--success-soft);color:var(--success);}
.badge-orange{background:var(--warning-soft);color:var(--warning);}
.badge-red{background:var(--danger-soft);color:var(--danger);}
.badge-grey{background:var(--locked-soft);color:var(--muted);}
.badge-blue{background:var(--primary-soft);color:var(--primary-dark);}
.badge-outline{background:transparent;border-color:var(--border);color:var(--text-soft);}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor;}

/* BROWSE / SUBJECT CARDS */
.browse-card{padding:22px;display:flex;flex-direction:column;gap:12px;transition:.15s;cursor:pointer;}
.browse-card:hover{border-color:var(--primary-soft-border);box-shadow:var(--shadow-2);transform:translateY(-1px);}
.browse-card-top{display:flex;align-items:flex-start;justify-content:space-between;}
.browse-card h4{font-size:17px;}
.browse-card .meta-row{display:flex;gap:14px;font-size:13px;color:var(--muted);font-weight:600;}
.browse-card .meta-row .num{color:var(--text-soft);}
.browse-card .desc-line{font-size:13.5px;color:var(--muted);line-height:1.5;}
.browse-card .cta-line{margin-top:4px;font-size:13.5px;font-weight:700;color:var(--primary-dark);display:flex;align-items:center;gap:5px;}
.icon-tile{width:40px;height:40px;border-radius:10px;background:var(--primary-soft);color:var(--primary-dark);display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* TOOLBAR */
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:20px;flex-wrap:wrap;}
.search-box{flex:1;min-width:200px;display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:9px 13px;}
.search-box input{border:none;outline:none;background:transparent;font-size:14px;width:100%;color:var(--text);}
.filter-chip-row{display:flex;gap:7px;flex-wrap:wrap;}
.chip{padding:7px 13px;border-radius:99px;border:1px solid var(--border);background:var(--surface);font-size:13px;font-weight:700;color:var(--text-soft);}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff;}
.select-box{border:1px solid var(--border);background:var(--surface);border-radius:10px;padding:9px 12px;font-size:13.5px;font-weight:600;color:var(--text-soft);}
@media(max-width:700px){.filter-chip-row{display:none;} .mobile-filter-btn{display:flex !important;}}
.mobile-filter-btn{display:none;}

/* TEST LIST CARDS */
.test-card{padding:20px 22px;display:flex;flex-direction:column;gap:14px;}
.test-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;}
.test-card h4{font-size:16.5px;}
.test-card .sub-line{font-size:12.5px;color:var(--faint);margin-top:3px;font-weight:600;}
.stat-row{display:flex;gap:22px;flex-wrap:wrap;}
.stat{display:flex;flex-direction:column;gap:2px;}
.stat .label{font-size:11px;color:var(--faint);font-weight:700;text-transform:uppercase;letter-spacing:.03em;}
.stat .value{font-size:14.5px;font-weight:700;color:var(--text-soft);}
.test-card-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-soft);}
.score-pill{display:flex;align-items:baseline;gap:4px;}
.score-pill .big{font-size:20px;color:var(--success);}
.score-pill .of{font-size:12.5px;color:var(--muted);font-weight:600;}

/* INSTRUCTIONS LIST */
.instructions-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:11px;}
.instructions-list li{display:flex;gap:10px;font-size:14px;color:var(--text-soft);line-height:1.5;}
.instructions-list .n{flex-shrink:0;width:21px;height:21px;border-radius:6px;background:var(--primary-soft);color:var(--primary-dark);font-size:11.5px;font-weight:800;display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono';margin-top:1px;}

/* FILE TILES */
.file-tile{display:flex;align-items:center;gap:13px;padding:15px 16px;border:1px solid var(--border);border-radius:var(--radius-m);background:var(--bg);}
.file-icon{width:42px;height:42px;border-radius:9px;background:var(--danger-soft);color:var(--danger);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.file-icon.blue{background:var(--primary-soft);color:var(--primary-dark);}
.file-meta .fname{font-size:14px;font-weight:700;color:var(--text);}
.file-meta .fsize{font-size:12.5px;color:var(--muted);margin-top:2px;}

/* UPLOAD */
.upload-area{border:2px dashed var(--border);border-radius:var(--radius-m);padding:40px 20px;text-align:center;background:var(--bg);transition:.15s;cursor:pointer;}
.upload-area:hover{border-color:var(--primary);background:var(--primary-soft);}
.upload-area .u-icon{width:50px;height:50px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;}
.upload-area h4{font-size:15.5px;margin-bottom:5px;}
.upload-area .sub{font-size:13px;color:var(--muted);}
.upload-formats{margin-top:14px;display:flex;gap:8px;justify-content:center;flex-wrap:wrap;}
.fmt-pill{font-size:11px;font-weight:800;padding:3px 9px;border-radius:6px;background:var(--surface);border:1px solid var(--border);color:var(--muted);}
.progress-track{height:7px;border-radius:99px;background:var(--border-soft);overflow:hidden;margin-top:10px;}
.progress-fill{height:100%;background:var(--primary);border-radius:99px;transition:width .25s ease;}

/* TIMELINE */
.timeline{display:flex;flex-direction:column;gap:0;}
.t-step{display:flex;gap:14px;position:relative;padding-bottom:26px;}
.t-step:last-child{padding-bottom:0;}
.t-line{position:absolute;left:12px;top:26px;bottom:0;width:2px;background:var(--border);}
.t-step:last-child .t-line{display:none;}
.t-dot{width:25px;height:25px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;z-index:1;}
.t-dot.done{background:var(--success);color:#fff;}
.t-dot.pending{background:var(--locked-soft);border:2px solid var(--border);color:var(--faint);}
.t-dot.current{background:var(--warning-soft);border:2px solid var(--warning);color:var(--warning);}
.t-body .t-title{font-size:14.5px;font-weight:700;color:var(--text);}
.t-body .t-title.pending{color:var(--faint);}
.t-body .t-sub{font-size:12.5px;color:var(--muted);margin-top:2px;}

/* TABS */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:22px;overflow-x:auto;}
.tab-btn{padding:11px 16px;font-size:14px;font-weight:700;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap;background:none;border-top:none;border-left:none;border-right:none;}
.tab-btn.active{color:var(--primary-dark);border-color:var(--primary);}

/* RESULT */
.result-hero{display:flex;align-items:center;gap:26px;padding:26px;flex-wrap:wrap;}
.score-circle{width:104px;height:104px;border-radius:50%;background:var(--success-soft);border:3px solid var(--success);display:flex;flex-direction:column;align-items:center;justify-content:center;flex-shrink:0;}
.score-circle.fail{background:var(--danger-soft);border-color:var(--danger);}
.score-circle .sc-num{font-size:24px;color:var(--success);}
.score-circle.fail .sc-num{color:var(--danger);}
.score-circle .sc-of{font-size:11px;color:var(--muted);font-weight:700;}
.result-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;flex:1;min-width:280px;}
@media(max-width:640px){.result-facts{grid-template-columns:repeat(2,1fr);}}

/* LOCKED */
.locked-card{padding:24px;text-align:center;border:1px dashed var(--border);border-radius:var(--radius-m);background:var(--locked-soft);}
.locked-icon{width:44px;height:44px;border-radius:50%;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;color:var(--locked);}

/* EMPTY STATE */
.empty-state{padding:52px 24px;text-align:center;}
.empty-state .e-icon{width:52px;height:52px;border-radius:14px;background:var(--locked-soft);color:var(--locked);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;}
.empty-state h4{font-size:16.5px;margin-bottom:6px;}
.empty-state p{font-size:13.5px;color:var(--muted);max-width:340px;margin:0 auto;}

/* MODAL */
.modal-overlay{position:fixed;inset:0;background:rgba(16,24,40,0.5);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px;}
.modal-box{background:var(--surface);border-radius:var(--radius-l);max-width:440px;width:100%;padding:26px;box-shadow:var(--shadow-2);}
.modal-box h3{font-size:18px;margin-bottom:8px;}
.modal-box .modal-sub{font-size:13.5px;color:var(--muted);line-height:1.5;margin-bottom:18px;}
.modal-fact-row{display:flex;justify-content:space-between;font-size:13.5px;padding:9px 0;border-bottom:1px solid var(--border-soft);}
.modal-fact-row .k{color:var(--muted);font-weight:600;}
.modal-fact-row .v{font-weight:700;color:var(--text);}
.modal-actions{display:flex;gap:10px;margin-top:20px;}

/* BOTTOM SHEET */
.sheet-overlay{position:fixed;inset:0;background:rgba(16,24,40,0.45);z-index:100;display:flex;align-items:flex-end;}
.sheet{background:var(--surface);width:100%;border-radius:20px 20px 0 0;padding:22px;max-height:75vh;overflow:auto;}
.sheet-handle{width:36px;height:4px;border-radius:99px;background:var(--border);margin:0 auto 16px;}

/* TIMER */
.timer-pill{display:flex;align-items:center;gap:7px;background:var(--danger-soft);color:var(--danger);padding:8px 15px;border-radius:10px;font-weight:800;}

/* FOOTER */
.footer{margin-top:auto;border-top:1px solid var(--border);padding:26px 0;text-align:center;color:var(--faint);font-size:12.5px;}

::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:#D5DCE5;border-radius:99px;}

/* RESPONSIVE */
@media(max-width:760px){
  .container{padding-left:16px;padding-right:16px;}
  .page-head{padding:28px 0 20px;}
  .page-head h1{font-size:25px;}
  .page-head p{font-size:14px;}
  .grid[style*="grid-template-columns:2fr 1fr"],
  .grid[style*="grid-template-columns:1fr 1fr"],
  .grid[style*="grid-template-columns:1.3fr 1fr"],
  .grid[style*="grid-template-columns:2.2fr 1fr"]{
    grid-template-columns:1fr !important;
  }
  .test-card-bottom{align-items:flex-start;gap:10px;flex-wrap:wrap;}
  .test-card-bottom .btn{margin-left:auto;}
  .file-tile{align-items:flex-start;flex-wrap:wrap;}
  .file-meta{min-width:0;}
  .file-tile > div:last-child{width:100%;}
  .file-tile > div:last-child .btn{flex:1;}
  .modal-actions{flex-direction:column;}
  .result-hero{padding:20px;}
  .score-circle{margin:0 auto;}
  .result-facts{min-width:100%;}
  .tabs{margin-bottom:18px;}
  .tab-btn{padding:10px 13px;font-size:13px;}
  .toolbar{align-items:stretch;}
  .search-box{min-width:100%;}
  .select-box{width:100%;}
  .mobile-filter-btn{width:100%;}
}

.question-paper-actions{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
  margin-top:14px;
}
.question-paper-actions .btn{width:100%;}
@media(max-width:760px){ .question-paper-actions{grid-template-columns:1fr;} }

@media(max-width:640px){
  .upload-action-row{flex-direction:column;}
  .upload-action-row .btn{width:100%;}
}

@media(max-width:760px){
  .leader-top{grid-template-columns:1fr !important;}
  .leader-row{grid-template-columns:52px minmax(120px,1fr) 75px 105px !important;}
  .leader-head{font-size:10px !important;}
  .leaderboard-card{margin-left:0;margin-right:0;}
}
@media(max-width:480px){
  .leaderboard-card > div:last-child{overflow-x:auto;}
  .leader-row{min-width:520px;}
}
@media(max-width:480px){
  .btn{font-size:13px;padding:9px 13px;}
  .btn-sm{padding:7px 10px;font-size:12px;}
  .browse-card{padding:18px;}
  .test-card{padding:17px;}
  .stat-row{gap:15px;}
  .file-tile{padding:13px;}
  .file-tile > div:last-child{display:flex;flex-direction:column;gap:8px;}
  .file-tile > div:last-child .btn{width:100%;}
  .result-facts{gap:12px;}
  .result-facts .stat{min-width:0;}
}