.papers-page{min-height:calc(100vh - 80px);padding:2rem;max-width:1200px;margin:0 auto;box-sizing:border-box;overflow-y:auto}.page-header{text-align:center;margin-bottom:30px}.page-header h1{color:#333;font-size:32px;font-weight:700;margin:0}.subject-block{background:white;border-radius:16px;margin-bottom:32px;box-shadow:0 4px 20px rgba(0,0,0,.08);border:1px solid #e2e8f0;overflow:hidden;transition:all .2s ease}.subject-block:hover{box-shadow:0 8px 32px rgba(0,0,0,.12);transform:translateY(-2px)}.subject-header{background:linear-gradient(135deg,#10b981,#059669);color:white;padding:20px 25px;margin:0;display:flex;justify-content:space-between;align-items:center;cursor:pointer;transition:background .2s ease}.subject-header:hover{background:linear-gradient(135deg,#059669,#047857)}.collapse-btn{background:none;border:none;color:white;cursor:pointer;padding:8px;border-radius:4px;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.collapse-btn:hover{background:rgba(255,255,255,.1)}.collapse-btn svg{transition:transform .2s ease}.collapse-btn.expanded svg{transform:rotate(180deg)}.subject-header h3{margin:0;font-size:20px;font-weight:600}.subject-content{padding:25px}.papers-form{margin-bottom:30px}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));grid-gap:20px;gap:20px;align-items:end}.form-group{display:flex;flex-direction:column}.form-group label{font-weight:600;color:#374151;margin-bottom:8px;font-size:14px}.form-dropdown{padding:12px;border:2px solid #e5e7eb;border-radius:8px;font-size:14px;background:white;transition:all .2s ease;cursor:pointer}.form-dropdown:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.1)}.add-button{padding:12px 24px;background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:white;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease;font-size:14px}.add-button:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(59,130,246,.3)}.success-message{background:#d1fae5;color:#065f46;padding:12px 16px;border-radius:8px;margin-top:16px;font-weight:500}.papers-table-wrap{overflow-x:auto;border-radius:12px;border:1px solid #e5e7eb}.papers-table{width:100%;border-collapse:collapse;background:white}.papers-table th{background:#f9fafb;padding:16px 12px;text-align:left;font-weight:600;color:#374151;border-bottom:1px solid #e5e7eb;font-size:14px}.papers-table td{padding:16px 12px;border-bottom:1px solid #f3f4f6;font-size:14px}.papers-table tr:hover{background:#f9fafb}.checkbox-cell{text-align:center}.checkbox-cell input[type=checkbox]{width:18px;height:18px;cursor:pointer}.marks-input-container{display:flex;align-items:center;gap:8px}.marks-input{width:60px;padding:8px;border:1px solid #d1d5db;border-radius:4px;text-align:center;font-size:14px}.marks-total{color:#6b7280;font-size:14px;font-weight:500}.delete-btn,.open-btn{background:none;border:none;cursor:pointer;padding:8px;border-radius:4px;transition:all .2s ease;display:flex;align-items:center;justify-content:center}.open-btn{color:#3b82f6}.open-btn:hover{background:#eff6ff;color:#1d4ed8}.delete-btn{color:#ef4444}.delete-btn:hover{background:#fef2f2;color:#dc2626}.no-papers,.no-subjects{text-align:center;padding:3rem;color:#6b7280;font-size:1.1rem;background:white;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.05)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:1000}.modal-box{background:white;border-radius:12px;padding:2rem;max-width:400px;width:90%;box-shadow:0 20px 40px rgba(0,0,0,.2)}.modal-msg{margin-bottom:1.5rem;font-size:1.1rem;color:#374151}.modal-actions{display:flex;gap:1rem;justify-content:flex-end}.modal-yes{background:#ef4444;color:white;border:none;padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;font-weight:600;transition:all .2s ease}.modal-yes:hover{background:#dc2626;transform:translateY(-1px)}.modal-cancel{background:#6b7280;color:white;border:none;padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;font-weight:600;transition:all .2s ease}.modal-cancel:hover{background:#4b5563;transform:translateY(-1px)}@media (max-width:768px){.papers-page{padding:1rem}.form-row{grid-template-columns:1fr}.papers-table-wrap{font-size:12px}.papers-table td,.papers-table th{padding:8px 6px}}