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#ddd;border-radius:8px;color:#555;cursor:pointer;font-size:12px;font-weight:500;padding:6px 12px;transition:all .2s ease}.interest-btn:hover{background:#e9ecef;border-color:#ccc}.interest-btn.active{background:#e7f3ff;border-color:#06c;color:#06c}.interest-btn.active:hover{background:#cce5ff}.planner-add-btn,.planner-remove-btn{border:none;border-radius:8px;cursor:pointer;font-size:13px;font-weight:500;padding:8px 16px;transition:all .2s ease}.planner-add-btn{background:#e7f3ff;color:#06c}.planner-add-btn:hover{background:#cce5ff}.planner-remove-btn{background:#fff5f5;color:#c33}.planner-remove-btn:hover{background:#ffe5e5}.planner-added-by-parent,.planner-added-by-student{color:#6c757d;font-size:12px;font-style:italic}.register-button{background:linear-gradient(135deg,#28a745,#20c997);border-radius:8px;box-shadow:0 3px 10px #28a7454d;color:#fff;display:inline-block;font-size:14px;font-weight:600;padding:12px 24px;text-decoration:none;transition:all .3s 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