:root{
  --bg:#0b0b0c; /* page background - black */
  --panel:#0f1720; /* card background - very dark */
  --accent:#22d3ee; /* cyan accent */
  --muted:#9aa4af;
  --text:#e6eefc; /* near-white text */
}

*{box-sizing:border-box;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif}
body{margin:0;background:var(--bg);color:var(--text);padding:0}
.page-bg{min-height:100vh;padding:28px}
.app-shell{max-width:100%;width:100%;margin:0 auto}
.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px;padding:20px 0}
.brand h1{margin:0;font-size:28px;color:var(--text);font-weight:600;text-align:center}
.brand-sub{margin:8px 0 0 0;color:var(--muted);font-size:14px;text-align:center}
.layout{display:grid;grid-template-columns:1.8fr 1fr;gap:24px;width:100%}
.panel{display:flex;flex-direction:column;gap:20px}

/* Cards */
.panel .card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.015));padding:20px;border-radius:12px;border:1px solid rgba(34,211,238,0.2);box-shadow:0 10px 30px rgba(2,6,23,0.6);margin-bottom:0;transition:all .25s}
.panel .card:hover{box-shadow:0 10px 30px rgba(2,6,23,0.8);border-color:rgba(34,211,238,0.3)}
.pum-info-card{background:linear-gradient(135deg, rgba(34,211,238,0.15), rgba(34,211,238,0.05));border:2px solid rgba(34,211,238,0.5);box-shadow:0 0 20px rgba(34,211,238,0.2);margin-bottom:8px}
.pum-info-card .section-title{margin-bottom:16px;color:var(--accent)}
#calculationStrategy{border:1px solid rgba(34,211,238,0.2)}

/* Section titles */
.section-title{font-size:20px;font-weight:600;margin-bottom:12px;color:var(--text);text-align:center}
.section-description{color:var(--muted);font-size:13px;margin-bottom:16px}
.required{color:#ff5459}

.subjects-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.subject-card{padding:12px;border-radius:10px;background:transparent;border:1px solid rgba(255,255,255,0.03);cursor:pointer}
.subject-card .subject-header{display:flex;justify-content:space-between;font-weight:600;color:var(--text)}
.subject-card.selected{box-shadow:0 10px 30px rgba(34,211,238,0.06);border-color:rgba(34,211,238,0.12);background:linear-gradient(180deg, rgba(34,211,238,0.02), rgba(34,211,238,0.01))}
.paper-item{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-top:8px}
.field-label{display:block;font-size:13px;margin-bottom:8px;color:var(--muted)}
.input{width:100%;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:var(--text);font-size:14px}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,211,238,0.2)}
.input:required:invalid{border-color:#ff5459}
.actions-row{display:flex;gap:12px;align-items:center}
.btn{background:var(--accent);color:#0b0b0c;border:none;padding:10px 16px;border-radius:8px;cursor:pointer;font-weight:600;font-size:14px;transition:all .25s}
.btn:hover{opacity:0.9}
.btn.small{padding:6px 12px;font-size:13px}
.btn.outline{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,0.06)}
.btn.outline:hover{background:rgba(255,255,255,0.05);border-color:rgba(255,255,255,0.1)}
.btn.primary{background:var(--accent)}
.btn:disabled,.btn.disabled{opacity:0.4;cursor:not-allowed;pointer-events:none}
.muted{color:var(--muted)}
.report-card .report-header{margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,0.05)}
.report-card .report-header h3{margin:0 0 8px 0;font-size:24px;color:var(--text)}
.report-stats{display:flex;gap:12px;color:var(--muted);font-weight:600}
.components{display:block;overflow:auto;min-width:100%}
.table-wrap{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.subjects-table{width:100%;border-collapse:collapse;font-size:14px;min-width:100%}
.subjects-table th,.subjects-table td{padding:10px;border-bottom:1px solid rgba(255,255,255,0.05);text-align:left}
.subjects-table th{background:rgba(255,255,255,0.02);font-weight:600}
.component-cell{font-size:13px;color:var(--muted);line-height:1.6;font-family:monospace}
.weighted-marks-cell{font-size:13px;color:var(--accent);font-weight:600}
.grade-badge{display:inline-block;padding:6px 10px;border-radius:8px;background:rgba(34,211,238,0.08);color:var(--accent);font-weight:600}
.summary-section{margin:24px 0;padding:20px;background:rgba(34,211,238,0.05);border-radius:10px;border:1px solid rgba(34,211,238,0.1)}
.summary-title{font-size:18px;font-weight:600;margin:24px 0 16px 0;color:var(--text);text-align:center}
.summary-stats{display:flex;justify-content:space-around;flex-wrap:wrap;gap:24px}
.stat{display:flex;flex-direction:column;align-items:center;gap:8px}
.stat-label{font-size:13px;color:var(--muted);font-weight:500}
.stat-value{font-size:24px;font-weight:700;color:var(--text)}
.report-actions{display:flex;gap:12px;justify-content:center;margin-top:24px;padding-top:20px;border-top:1px solid rgba(255,255,255,0.05)}
.status-messages{position:fixed;right:20px;top:20px;z-index:1000}
.status-message{background:#111;color:var(--text);padding:8px 12px;border-radius:6px;margin-bottom:8px;opacity:0;transform:translateX(100%);transition:all .25s}
.status-message.show{opacity:1;transform:translateX(0)}
.status-message.success{background:rgba(34,211,238,0.15);color:var(--accent);border:1px solid rgba(34,211,238,0.3)}
.status-message.error{background:rgba(255,84,89,0.15);color:#ff5459;border:1px solid rgba(255,84,89,0.3)}
.status-message.info{background:rgba(154,164,175,0.15);color:var(--muted);border:1px solid rgba(154,164,175,0.3)}

/* Mark Entry Section - Enhanced Styling */
#markInputSection{margin-top:20px}
.mark-input-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px;margin-top:16px}
.mark-input-card{padding:20px;border-radius:12px;background:linear-gradient(180deg, rgba(34,211,238,0.08), rgba(34,211,238,0.03));border:1px solid rgba(34,211,238,0.15);box-shadow:0 4px 12px rgba(34,211,238,0.1);transition:all .25s}
.mark-input-card:hover{border-color:rgba(34,211,238,0.25);box-shadow:0 6px 16px rgba(34,211,238,0.15);transform:translateY(-2px)}
.mark-input-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid rgba(34,211,238,0.2)}
.mark-subject-name{font-weight:700;font-size:18px;color:var(--text)}
.mark-subject-code{font-size:12px;color:var(--accent);background:rgba(34,211,238,0.15);padding:6px 10px;border-radius:6px;font-weight:600;letter-spacing:0.5px}
.paper-inputs{display:flex;flex-direction:column;gap:12px}
.paper-input-row{display:flex;align-items:center;gap:10px;padding:10px;background:rgba(255,255,255,0.02);border-radius:8px;border:1px solid rgba(255,255,255,0.05);transition:all .2s}
.paper-input-row:focus-within{background:rgba(34,211,238,0.05);border-color:rgba(34,211,238,0.3)}
.paper-label{flex:1;font-size:13px;color:var(--text);font-weight:500;min-width:140px}
.paper-mark-input{width:80px;text-align:center;font-weight:600;font-size:14px;padding:8px;border-radius:6px;border:1px solid rgba(255,255,255,0.1);background:rgba(255,255,255,0.03);color:var(--text);transition:all .2s}
.paper-mark-input::placeholder{font-size:13px;opacity:0.8}
.paper-mark-input:focus{outline:none;border-color:var(--accent);background:rgba(34,211,238,0.1);box-shadow:0 0 0 3px rgba(34,211,238,0.2)}
.paper-mark-input.error{border-color:#ff5459;background:rgba(255,84,89,0.1)}
.paper-separator{font-size:14px;color:var(--muted);font-weight:500;width:20px;text-align:center}
.paper-max{width:60px;text-align:center;background:rgba(34,211,238,0.1);border:1px solid rgba(34,211,238,0.2);color:var(--accent);font-weight:600;font-size:13px;padding:8px;border-radius:6px;cursor:not-allowed}
.form-control.paper-mark-input,.form-control.paper-max{border:none;background:transparent;padding:0; width: 90px;}
.subject-total-row{margin-top:16px;padding-top:12px;border-top:2px solid rgba(34,211,238,0.2);display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--accent);font-size:15px}
.subject-total-row span:first-child{color:var(--text)}
.error-message{color:#ff5459;font-size:12px;margin-top:8px;font-weight:500;padding-left:4px}

/* Calculation Strategy Section - Compact at bottom */
#calculationStrategy{max-width:100%;margin:32px auto 0;padding:16px 20px}
.compact-grading .section-title{font-size:18px;margin-bottom:12px}
.compact-grading .grading-explanation{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}
.compact-grading .explanation-item{padding:12px;background:rgba(255,255,255,0.02);border-radius:8px;border:1px solid rgba(255,255,255,0.05)}
.compact-grading .explanation-item h4{color:var(--accent);margin-bottom:6px;font-size:14px;font-weight:600}
.compact-grading .explanation-item p{color:var(--muted);margin:0;font-size:12px;line-height:1.4}
.compact-grading .grade-scale{display:none}
.compact-grading .grade-scale h4{margin-bottom:12px;color:var(--text);text-align:center;font-size:16px;font-weight:600}
.compact-grading .grade-scale-items{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center}
.compact-grading .grade-item{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.compact-grading .grade-item .grade-badge{padding:4px 8px;font-size:11px}

@media (max-width:980px){
  .layout{grid-template-columns:1fr}
  .subjects-grid{grid-template-columns:repeat(1,1fr)}
  .compact-grading .grading-explanation{grid-template-columns:repeat(2,1fr)}
  .summary-stats{flex-direction:column}
  .report-actions,.actions-row{flex-direction:column}
  .mark-input-group{grid-template-columns:1fr}
}
@media (max-width:768px){
  .page-bg{padding:16px}
  .app-header{margin-bottom:24px;padding:12px 0;flex-direction:column;gap:12px}
  .brand h1{font-size:22px}
  .brand-sub{font-size:12px;margin-top:4px}
  .header-actions{display:flex;gap:8px;width:100%;flex-direction:column}
  .header-actions .btn{width:100%;text-align:center}
  .subjects-table{font-size:13px}
  .subjects-table th,.subjects-table td{padding:8px}
  .mark-input-card{padding:16px}
  .paper-inputs{gap:10px}
  .paper-input-row{padding:8px}
  .btn{padding:12px 16px;font-size:16px;min-height:44px}
  .input{padding:12px;font-size:16px;min-height:44px}
  body{font-size:15px}
  #calculationStrategy{margin:24px auto 0}
}
@media (max-width:640px){
  .page-bg{padding:12px}
  .app-shell{padding:0}
  .app-header{margin-bottom:16px;padding:8px 0;flex-direction:column;gap:12px}
  .brand h1{font-size:20px}
  .brand-sub{font-size:11px}
  body{font-size:14px}
  .container{padding:0}
  
  /* Report Card Fixes */
  .report-card{padding:12px !important}
  .report-card .report-header{margin-bottom:16px;padding-bottom:12px}
  .report-card .report-header h3{font-size:18px;margin:0 0 6px 0}
  .report-card .report-header div:first-child{margin-bottom:8px}
  
  /* Table layout - proper card view */
  .summary-stats{gap:16px;flex-direction:column}
  .stat-value{font-size:20px}
  .stat-label{font-size:12px}
  .subjects-table{font-size:11px;width:100%;border-collapse:separate;border-spacing:0 8px}
  .subjects-table thead{display:table-header-group;background:rgba(255,255,255,0.02)}
  .subjects-table th{padding:8px 4px;font-size:10px;text-align:center;background:transparent}
  .subjects-table tbody{display:table-row-group}
  .subjects-table tr{display:table-row;margin-bottom:8px;border:1px solid rgba(34,211,238,0.15);border-radius:6px;background:rgba(255,255,255,0.015)}
  .subjects-table td{display:table-cell;padding:6px 4px;text-align:center;border-bottom:1px solid rgba(255,255,255,0.05);word-break:break-word}
  .subjects-table td:first-child{text-align:left;font-weight:600;color:var(--text);padding:8px 6px;min-width:60px}
  .subjects-table td:nth-child(2){font-size:10px;color:var(--muted);padding:6px 2px}
  .subjects-table td:nth-child(3),.subjects-table td:nth-child(4){font-size:11px;padding:6px 4px}
  .subjects-table td:nth-child(5),.subjects-table td:nth-child(6){color:var(--accent);font-weight:600;font-size:12px}
  .subjects-table td:last-child{font-weight:600;padding:8px 4px}
  
  .component-cell{font-size:10px;color:var(--muted);line-height:1.4}
  .weighted-marks-cell{font-size:11px;color:var(--accent);font-weight:600}
  .grade-badge{padding:4px 6px;font-size:10px}
  
  .mark-input-card{padding:14px}
  .mark-input-header{margin-bottom:12px;padding-bottom:10px}
  .mark-subject-name{font-size:16px}
  .mark-subject-code{font-size:11px;padding:4px 8px}
  .paper-input-row{gap:8px;padding:8px;flex-wrap:wrap}
  .paper-label{min-width:100%;font-size:12px;margin-bottom:4px}
  .paper-mark-input,.paper-max{width:100%;font-size:16px;padding:10px}
  .paper-separator{display:none}
  .subject-total-row{margin-top:12px;font-size:14px}
  
  .btn{padding:14px 16px;font-size:15px;min-height:48px;width:100%;margin-bottom:8px}
  .actions-row{width:100%;flex-direction:column}
  .actions-row .btn{width:100%}
  .input{padding:12px;font-size:16px;min-height:44px;width:100%}
  .report-stats{font-size:12px;gap:8px}
  .section-title{font-size:18px;margin-bottom:10px}
  .card{padding:14px;margin-bottom:0;border-radius:10px}
  .mark-input-group{gap:12px}
  .compact-grading .grading-explanation{grid-template-columns:1fr;gap:10px}
  .compact-grading .explanation-item{padding:10px}
  .compact-grading .explanation-item h4{font-size:13px}
  .compact-grading .explanation-item p{font-size:11px}
  .status-messages{right:10px;top:10px}
  .status-message{padding:10px;font-size:13px}
  
  .summary-section{margin:16px 0;padding:12px;border-radius:8px}
  .summary-title{font-size:16px;margin:0 0 12px 0;padding:0}
  .report-actions{flex-direction:column;gap:8px;margin-top:12px;padding-top:12px}
  .report-actions .btn{width:100%}
}\n@media (max-width:480px){
  .page-bg{padding:8px}
  .app-header{margin-bottom:12px;padding:4px 0}
  .brand h1{font-size:18px}
  .brand-sub{font-size:10px;margin-top:2px}
  
  /* Report card ultra-small screen */
  .report-card{padding:10px !important}
  .subjects-table{font-size:10px}
  .subjects-table th{padding:6px 3px;font-size:9px}
  .subjects-table td{padding:5px 2px;font-size:9px}
  .subjects-table td:first-child{min-width:50px;padding:6px 3px}
  .subjects-table td:nth-child(2){font-size:8px}
  
  .mark-input-card{padding:12px;margin-bottom:12px}
  .btn{padding:12px;font-size:14px;min-height:44px}
  .input{padding:10px;font-size:15px}
  body{font-size:13px;line-height:1.5}
  .section-title{font-size:16px;margin-bottom:8px}
  .summary-stats{gap:12px;flex-direction:column}
  .stat-value{font-size:18px}
  .stat-label{font-size:11px}
  .summary-title{font-size:15px;margin:0 0 10px 0;padding:0}
  .report-card .report-header{margin-bottom:12px;padding-bottom:10px}
  .report-card .report-header h3{font-size:16px;margin-bottom:4px}
  .summary-section{margin:12px 0;padding:10px}
  .report-actions{margin-top:10px;padding-top:10px;gap:6px}
  .report-actions .btn{padding:12px;font-size:13px}
}